DRV8316_技术文档

DRV8316

www.ti.com

SLVSF16 – JANUARY 2021

DRV8316 Three-Phase Integrated FET Motor Driver

1 Features

3 Description

•

Three-phase PWM motor driver

– 3-Phase Brushless-DC motors

4.5-V to 35-V operating voltage

– 40-V Absolute maximum voltage

High output current capability

– 8-A Peak current drive

Low on-state resistance

– 95-mΩ R_DS(ON)(HS + LS) at T_A= 25°C

Low power sleep mode

– 1.5-µA at V_VM= 24-V, T_A= 25°C

Multiple control interface options

– 6x PWM control interface

The DRV8316 provides three half-H-bridge integrated

MOSFET drivers for driving a three-phase Brushless-

DC (BLDC) motor for 12-V/24-V DC rails or battery

powered applications. These applications include

field-oriented control (FOC), sinusoidal current

control, and trapezoidal current control of BLDC

motors. The device integrates three current-sense

amplifiers (CSA) with built-in current sense for

sensing the three phase currents of BLDC motors.

Each output driver channel consists of N-channel

power MOSFETs configured in

a

half-bridge

configuration. Various PWM control modes are

supported for simple interfacing to control circuits that

can be powered by the 30-mA, 3.3-V internal

regulator (AVDD). The DRV8316R/T also supports a

buck regulator which in conjunction can support 200-

mA with programmable regulated supply. The device

supports 200-kHz maximum PWM frequency.

– 3x PWM control interface

Supports 200-kHz PWM frequency

Cycle by cycle current limit

•

Built-in integrated current sense

– No external resistor required

SPI and Hardware device variants

– 5-MHz, 16-Bit SPI communication

Supports 1.8-V, 3.3-V, and 5-V logic inputs

Built-in 3.3-V, 30-mA LDO regulator

Built-in 3.3-V/5-V, 200-mA buck regulator

Delay compensation to reduce duty cycle distortion

Integrated protection features

– VM undervoltage lockout (UVLO)

– Charge pump undervoltage (CPUV)

– Overcurrent protection (OCP)

– Thermal warning and shutdown (OTW/OTSD)

– Fault condition indication pin (nFAULT)

Internal protection functions are provided for

undervoltage lockout (UVLO), Overvoltage protection

(OVP), charge pump undervoltage (CPUV),

overcurrent protection (OCP), over-temperature

warning (OTW) and over-temperature shutdown

(OTSD). Fault conditions are indicated by the nFAULT

pin.

•

Device Information ⁽¹⁾

PART NUMBER

DRV8316R

PACKAGE

VQFN (40)

BODY SIZE (NOM)

7.00 mm x 5.00 mm

DRV8316T ⁽²⁾

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

2 Applications

(2) Device available for preview only.

•

CPAP machines

Printers

Camera gimbals

HVAC motors

Office automation machines

Factory automation and robotics

4.5 V to 35 V

DRV8316T/R

OUTA

nSLEEP

Three Phase PWM

Motor Driver

PWM (6x/3x)

M

HW / SPI

Buck Regulator (R)

3x Shunt Amplifier

Built-In Protection

OUTB

CSA Output

nFAULT

OUTC

Simplified Schematic

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.

Submit Document Feedback

1

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Table of Contents

1 Features............................................................................1

2 Applications.....................................................................1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Device Comparison Table ..............................................3

6 Pin Configuration and Functions...................................4

Pin Functions.................................................................... 6

7 Specifications.................................................................. 8

7.1 Absolute Maximum Ratings ....................................... 8

7.2 ESD Ratings .............................................................. 8

7.3 Recommended Operating Conditions ........................8

7.4 Thermal Information ...................................................9

7.5 Electrical Characteristics ............................................9

7.6 SPI Timing Requirements ........................................ 16

7.7 SPI Slave Mode Timings...........................................16

8 Detailed Description......................................................17

8.1 Overview...................................................................17

8.2 Functional Block Diagram.........................................18

8.3 Feature Description...................................................20

8.4 Device Functional Modes..........................................54

8.5 SPI Communication.................................................. 55

8.6 Register Map.............................................................56

9 Application and Implementation..................................69

9.1 Application Information............................................. 69

9.2 Typical Applications.................................................. 70

10 Power Supply Recommendations..............................75

10.1 Bulk Capacitance....................................................75

11 Layout...........................................................................76

11.1 Layout Guidelines................................................... 76

11.2 Layout Example...................................................... 77

11.3 Thermal Considerations..........................................78

12 Device and Documentation Support..........................79

12.1 Support Resources................................................. 79

12.2 Trademarks.............................................................79

12.3 Electrostatic Discharge Caution..............................79

12.4 Glossary..................................................................79

13 Mechanical, Packaging, and Orderable

Information.................................................................... 79

4 Revision History

DATE

REVISION

NOTES

January 2021

*

Initial release.

2

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

5 Device Comparison Table

DEVICE

PACKAGES

40-pin VQFN (7x5 mm)

INTERFACE

SPI

BUCK REGULATOR

DRV8316R

Yes

DRV8316T⁽¹⁾

Hardware

(1) Device available for preview only.

Submit Document Feedback

3

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

6 Pin Configuration and Functions

1

2

32

31

30

29

28

27

26

25

24

23

22

21

INLC

NC

AGND

FB_BK

GND_BK

SW_BK

CPL

INHC

3

INLB

4

INHB

INLA

5

6

INHA

DRV8316R

(PowerPAD)

CPH

7

AGND

AVDD

NC

CP

8

VM

9

VM

10

11

12

nSLEEP

nFAULT

DRVOFF

VM

PGND

Figure 6-1. DRV8316R 40-Pin VQFN With Exposed Thermal Pad Top View

4

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

NC

AGND

FB_BK

GND_BK

SW_BK

CPL

32

31

30

29

28

27

26

25

24

23

22

21

INLC

1

2

INHC

3

INLB

4

INHB

INLA

5

6

INHA

DRV8316T

(PowerPAD)

CPH

7

AGND

AVDD

VSEL_BK

nSLEEP

nFAULT

DRVOFF

CP

8

VM

9

VM

10

11

12

VM

PGND

Figure 6-2. DRV8316T 40-Pin VQFN With Exposed Thermal Pad Top View

Submit Document Feedback

5

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Pin Functions

40-pin Package

TYPE

DESCRIPTION

NAME

DRV8316R

DRV8316T

AGND

2, 26

PWR

Device analog ground. Connect to system ground.

3.3 internal regulator output. Connect a X5R or X7R, 1-µF, 6.3-V ceramic

capacitor between the AVDD1 and AGND pins. This regulator can source up

to 30 mA externally.

AVDD

25

PWR

Charge pump output. Connect a X5R or X7R, 1-µF, 16-V ceramic capacitor

between the CP and VM pins.

CP

8

7

6

8

7

6

PWR

Charge pump switching node. Connect a X5R or X7R, 47-nF, VM-rated

ceramic capacitor between the CPH and CPL pins.

CPH

CPL

Charge pump switching node. Connect a X5R or X7R, 47-nF, VM-rated

ceramic capacitor between the CPH and CPL pins.

DRVOFF

FB_BK

21

3

21

3

I

Disables all six MOSFETs.

PWR

Feedback for buck regulator. Connect output of buck regulator to this pin.

Amplifier gain setting. The pin is a 4 level input pin set by an external resistor

(Hardware devices).

GAIN

—

4

36

4

I

PWR

I

GND_BK

INHA

Buck regulator ground. Connect to system ground.

High-side driver control input for OUTA. This pin controls the output of the

high-side MOSFET.

27

High-side driver control input for OUTB. This pin controls the output of the

high-side MOSFET.

INHB

INHC

INLA

INLB

INLC

29

31

28

30

32

29

31

28

30

32

I

High-side driver control input for OUTC. This pin controls the output of the

high-side MOSFET.

Low-side driver control input for OUTA. This pin controls the output of the low-

side MOSFET.

Low-side driver control input for OUTB. This pin controls the output of the low-

side MOSFET.

Low-side driver control input for OUTC. This pin controls the output of the low-

side MOSFET.

PWM input mode setting. This pin is a 2 level input pin set by an external

resistor (Hardware devices).

MODE

NC

—

1, 24

22

33

1

I

—

O

No Connect.

Fault indication pin. Pulled logic-low with fault condition; open-drain output

requires an external pullup.

nFAULT

22

Serial chip select. A logic low on this pin enables serial interface

communication (SPI devices).

nSCS

nSLEEP

OCP

36

23

—

23

35

I

Driver nSLEEP. When this pin is logic low the device goes to a low-power

sleep mode. An 20 to 40-µs low pulse can be used to reset fault conditions.

OCP level setting. This pin is a 2 level input pin set by an external resistor

(Hardware devices).

OUTA

OUTB

OUTC

PGND

13, 14

16, 17

13, 14

16, 17

O

Half bridge output A

Half bridge output B

19, 20

O

Half bridge output C

12, 15, 18

PWR

Device power ground. Connect to system ground.

Serial clock input. Serial data is shifted out and captured on the corresponding

rising and falling edge on this pin.(SPI devices).

SCLK

35

—

I

Serial data input. Data is captured on the falling edge of the SCLK pin (SPI

devices).

SDI

34

33

—

40

—

34

40

I

SDO

SLEW

SOA

O

I

Serial data output. Data is shifted out on the rising edge of the SCLK pin.

Slew rate control setting. This pin is a 4 level input pin set by an external

resistor (Hardware devices).

O

Current sense amplifier output.

6

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

NAME

SOB

40-pin Package

TYPE

DESCRIPTION

DRV8316R

DRV8316T

39

38

5

39

38

5

O

Current sense amplifier output.

SOC

SW_BK

PWR

Buck switch node. Connect this pin to an inductor or resistor.

Current sense amplifier power supply input and reference. Connect a X5R or

X7R, 0.1-µF, 6.3-V ceramic capacitor between the VREF and AGND pins.

VREF/ILIM

VM

37

9, 10, 11

—

37

9, 10, 11

24

PWR/I

PWR

I

Power supply. Connect to motor supply voltage; bypass to GND with two 0.1-

µF capacitors (for each pin) plus one bulk capacitor rated for VM

Buck output voltage setting. This pin is a 4 level input pin set by an external

resistor (Hardware devices).

VSEL_BK

Thermal

pad

PWR

Must be connected to ground

Submit Document Feedback

7

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

7 Specifications

7.1 Absolute Maximum Ratings

over operating ambient temperature range (unless otherwise noted)⁽¹⁾

MIN

MAX UNIT

Power supply pin voltage (VM)

–0.3

40

4

V

V/µs

V

Power supply voltage ramp (VM)

Voltage difference between ground pins (GND_BK, PGND, AGND)

Charge pump voltage (CPH, CP)

–0.3

–1

0.3

V_M+ 6

V_M+ 0.3

5.75

V

Charge pump negative switching pin voltage (CPL)

Switching regulator pin voltage (FB_BK)

Switching node pin voltage (SW_BK)

Analog regulators pin voltage (AVDD)

Logic pin input voltage (DRVOFF, INHx, INLx, nSCS, nSLEEP, SCLK, SDI)

Logic pin output voltage (nFAULT, SDO)

Output pin voltage (OUTA, OUTB, OUTC)

Ambient temperature, T_A

V

V_M+ 0.3

5.75

V

5.75

V

5.75

V

V_M+ 1

125

V

–40

–65

°C

Junction temperature, T_J

150

Storage tempertaure, T_stg

150

(1) Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under

Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device

reliability.

7.2 ESD Ratings

VALUE

±2000

±500

UNIT

Human body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾

Electrostatic

discharge

V_(ESD)

V

Charged device model (CDM), per JEDEC specification JESD22-C101⁽²⁾

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)

MIN

NOM

MAX UNIT

V_VM

f_PWM

I_OUT

Power supply voltage

V_VM

4.5

24

35

200

8

V

kHz

A

Output PWM frequency

Peak output winding current

OUTA, OUTB, OUTC

(1)

DRVOFF, INHx, INLx, nSCS, nSLEEP,

SCLK, SDI

V_IN

Logic input voltage

–0.1

5.5

V

V_OD

Open drain pullup voltage

Push-pull voltage

nFAULT, SDO

SDO

–0.1

2.2

5.5

V

V_SDO

I_OD

V_VREF

T_A

Open drain output current

Voltage reference pin voltage

Operating ambient temperature

Operating Junction temperature

nFAULT, SDO

VREF

5

mA

V

2.8

–40

AVDD

125

150

°C

T_J

(1) Power dissipation and thermal limits must be observed

8

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

7.4 Thermal Information

DRV8316T, DRV8316R

THERMAL METRIC⁽¹⁾

VQFN (RGF)

40 Pins

25.7

UNIT

R_θJA

Junction-to-ambient thermal resistance

°C/W

R_θJC(top)

R_θJB

Junction-to-case (top) thermal resistance

Junction-to-board thermal resistance

15.2

7.3

Ψ_JT

Junction-to-top characterization parameter

Junction-to-board characterization parameter

Junction-to-case (bottom) thermal resistance

0.2

Ψ_JB

7.2

R_θJC(bot)

2.0

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

7.5 Electrical Characteristics

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

POWER SUPPLIES

V_VM> 6 V, nSLEEP = 0, T_A= 25 °C

nSLEEP = 0

0.6

0.5

1.5

2.5

5

µA

I_VMQ

VM sleep mode current

nSLEEP = 1, INHx = INLx = 0, SPI =

'OFF', BUCK_DIS = 1;

2

3

4

mA

VM standby mode current

(Buck regulator disabled)

I_VMS

V_VM> 6 V, nSLEEP = 1, INHx = INLx =

0, SPI = 'OFF', T_A= 25 °C, BUCK_DIS =

1;

V_VM> 6 V, nSLEEP = 1, INHx = INLx =

0, SPI = 'OFF', I_BK= 0, T_A= 25

°C, BUCK_DIS = 0;

3

4

5

mA

VM standby mode current

(Buck regulator enabled)

I_VMS

nSLEEP = 1, INHx = INLx = 0, SPI =

'OFF', I_BK= 0, BUCK_DIS = 0;

3

10

13

10

13

4

11.5

17

V_VM> 6 V, nSLEEP = 1, f_PWM= 25 kHz,

T_A= 25 °C, BUCK_DIS = 1

13 mA

21 mA

13 mA

21 mA

V_VM> 6 V, nSLEEP = 1, f_PWM= 200 kHz,

T_A= 25 °C, BUCK_DIS = 1

VM operating mode current

(Buck regulator disabled)

I_VM

nSLEEP =1, f_PWM= 25 kHz, BUCK_DIS

= 1

11.5

17

nSLEEP =1, f_PWM= 200 kHz,

BUCK_DIS = 1

V_VM> 6 V, nSLEEP = 1, f_PWM= 25 kHz,

T_A= 25 °C, BUCK_DIS =

0; BUCK_PS_DIS = 0

6

mA

VM operating mode current

(Buck regulator enabled)

I_VM

V_VM> 6 V, nSLEEP = 1, f_PWM= 200 kHz,

T_A= 25 °C, BUCK_DIS =

13

0; BUCK_PS_DIS = 0

0 mA ≤ I_AVDD≤ 30 mA; BUCK_PS_DIS =

0

V_AVDD

Analog regulator voltage

3.135

3.3

3.465

V

I_AVDD

V_VCP

f_CP

External analog regulator load

Charge pump regulator voltage

Charge pump switching frequency

30 mA

VCP with respect to VM

4.7

V

400

kHz

V_VM> V_UVLO, nSLEEP = 1 to outputs

ready and nFAULT released

t_WAKE

Wakeup time

1

ms

t_SLEEP

t_RST

Sleep Pulse time

Reset Pulse time

nSLEEP = 0 period to enter sleep mode

nSLEEP = 0 period to reset faults

120

20

µs

40

Submit Document Feedback

9

DRV8316

www.ti.com

MAX UNIT

SLVSF16 – JANUARY 2021

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

TYP

BUCK REGULATOR

V_VM> 6 V, 0 mA ≤ I_BK≤ 200 mA,

BUCK_SEL = 00b

3.1

4.6

3.7

5.2

3.3

5.0

4.0

5.7

3.5

5.4

4.3

6.2

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 200 mA,

BUCK_SEL = 01b

Buck regulator average voltage

(L_BK= 47 µH, C_BK= 22 µF)

(SPI Device)

V_VM> 6 V, 0 mA ≤ I_BK≤ 200 mA,

BUCK_SEL = 10b

V_BK

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 200 mA,

BUCK_SEL = 11b

V_VM< 6.0 V (BUCK_SEL = 00b, 01b,

10b) or V_VM< 6.0 V (BUCK_SEL = 11b),

0 mA ≤ I_BK≤ 200 mA

V_BK–

I_BK*(R_LBK

+2)

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA,

BUCK_SEL = 00b

3.1

4.6

3.7

5.2

3.3

5.0

4.0

5.7

3.5

5.4

4.3

6.2

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA,

BUCK_SEL = 01b

Buck regulator average voltage

(L_BK= 22 µH, C_BK= 22 µF)

(SPI Device)

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA,

BUCK_SEL = 10b

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 50 mA,

BUCK_SEL = 11b

V_VM< 6.0 V (BUCK_SEL = 00b, 01b,

10b) or V_VM< 6.0 V (BUCK_SEL = 11b),

0 mA ≤ I_BK≤ 50 mA

V_BK–

I_BK*(R_LBK

+2)

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 40 mA,

BUCK_SEL = 00b

3.1

4.6

3.7

5.2

3.3

5.0

4.0

5.7

3.5

5.4

4.3

6.2

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 40 mA,

BUCK_SEL = 01b

Buck regulator average voltage

(R_BK= 22 Ω, C_BK= 22 µF)

(SPI Device)

V_VM> 6 V, 0 mA ≤ I_BK≤ 40 mA,

BUCK_SEL = 10b

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 40 mA,

BUCK_SEL = 11b

V_VM< 6.0 V (BUCK_SEL = 00b, 01b,

10b) or V_VM< 6.0 V (BUCK_SEL = 11b),

0 mA ≤ I_BK≤ 40 mA

V_BK–

I_BK*(R_BK

+2)

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 200 mA,

VSEL_BK pin tied to AGND

3.1

4.6

3.3

5.0

3.5

5.4

V_VM> 6 V, 0 mA ≤ I_BK≤ 200

mA, VSEL_BK pin to Hi-Z

V_VM> 6 V, 0 mA ≤ I_BK≤ 200

mA, VSEL_BK pin to 47 kΩ +/- 5% tied

to AVDD

Buck regulator average voltage

(L_BK= 47 µH, C_BK= 22 µF)

(HW Device)

3.7

5.2

4.0

5.7

4.3

6.2

V_BK

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 200 mA,

VSEL_BK pin to AGND

V_BK

–

V_VM< 6.0 V, 0 mA ≤ I_BK≤ 200 mA

I_BK*(R_LBK

+2)

V

10

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA,

VSEL_BK pin tied to AGND

3.1

3.3

3.5

5.4

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 50

mA, VSEL_BK pin to Hi-Z

4.6

3.7

5.2

5.0

4.0

5.7

V_VM> 6 V, 0 mA ≤ I_BK≤ 50

mA, VSEL_BK pin to 47 kΩ +/- 5% tied

to AVDD

Buck regulator average voltage

(L_BK= 22 µH, C_BK= 22 µF)

(HW Device)

4.3

6.2

V

V_BK

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 50 mA,

VSEL_BK pin to AGND

V_BK

–

V_VM< 6.0 V, 0 mA ≤ I_BK≤ 50 mA

I_BK*(R_LBK

+2)

V_VM> 6 V, 0 mA ≤ I_BK≤ 40 mA,

VSEL_BK pin tied to AGND

3.1

4.6

3.3

5.0

3.5

5.4

V

V_VM> 6 V, 0 mA ≤ I_BK≤ 40

mA, VSEL_BK pin to Hi-Z

V_VM> 6 V, 0 mA ≤ I_BK≤ 40

mA, VSEL_BK pin to 47 kΩ +/- 5% tied

to AVDD

Buck regulator average voltage

(R_BK= 22 Ω, C_BK= 22 µF)

(HW Device)

3.7

5.2

4.0

5.7

4.3

6.2

V

V_BK

V_VM> 6.7 V, 0 mA ≤ I_BK≤ 40 mA,

VSEL_BK pin to AGND

V_BK

–

V_VM< 6.0 V, 0 mA ≤ I_BK≤ 40 mA

I_BK*(R_BK

+2)

V_VM> 6 V, 0 mA ≤ I_BK≤ 200 mA, Buck

regulator with inductor, L_BK= 47 uH, C_BK

= 22 µF

–100

100 mV

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA, Buck

regulator with inductor, L_BK= 22 uH, C_BK

= 22 µF

V_{BK_RIP}

Buck regulator ripple voltage

V_VM> 6 V, 0 mA ≤ I_BK≤ 50 mA, Buck

regulator with resistor; R_BK= 22 Ω, C_BK

= 22 µF

100 mV

200 mA

L_BK= 47 uH, C_BK= 22 µF,

BUCK_PS_DIS = 1b

L_BK= 47 uH, C_BK= 22 µF,

BUCK_PS_DIS = 0b

200 –

I_AVDD

mA

L_BK= 22 uH, C_BK

22 µF, BUCK_PS_DIS = 1b

=

50 mA

I_BK

External buck regulator load

L_BK= 22 uH, C_BK= 22 µF,

BUCK_PS_DIS = 0b

50 –

I_AVDD

mA

R_BK= 22 Ω, C_BK

22 µF, BUCK_PS_DIS = 1b

=

40 mA

R_BK= 22 Ω, C_BK= 22 µF,

BUCK_PS_DIS = 0b

40 –

I_AVDD

mA

Regulation Mode

Linear Mode

TBD

0

535 kHz

f_{SW_BK}

Buck regulator switching frequency

Submit Document Feedback

11

DRV8316

www.ti.com

MAX UNIT

SLVSF16 – JANUARY 2021

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

V_BKrising, BUCK_SEL = 00b

V_BKfalling, BUCK_SEL = 00b

V_BKrising, BUCK_SEL = 01b

V_BKfalling, BUCK_SEL = 01b

V_BKrising, BUCK_SEL = 10b

V_BKfalling, BUCK_SEL = 10b

V_BKrising, BUCK_SEL = 11b

V_BKfalling, BUCK_SEL = 11b

V_BKrising, VSEL_BK pin tied to AGND

V_BKfalling, VSEL_BK pin tied to AGND

MIN

2.7

2.5

4.3

4.1

2.7

2.5

4.3

4.1

2.7

2.5

TYP

2.8

2.6

4.4

4.2

2.8

2.6

4.4

4.2

2.8

2.6

2.9

2.7

4.5

4.3

2.9

2.7

4.5

4.3

2.9

2.7

V

Buck regulator undervoltage lockout

(SPI Device)

V_{BK_UV}

V_BKrising, VSEL_BK pin to 47 kΩ +/- 5%

tied to AVDD

4.3

4.1

4.4

4.2

4.5

4.3

V

V_BKfalling, VSEL_BK pin to 47 kΩ +/-

5% tied to AVDD

Buck regulator undervoltage lockout

(HW Device)

V_{BK_UV}

V_BKrising, VSEL_BK pin to Hi-Z

2.7

2.5

4.3

4.1

2.8

2.6

4.4

4.2

2.9

2.7

4.5

4.3

V

V_BKfalling, VSEL_BK pin to Hi-Z

V_BKrising, VSEL_BK pin tied to AVDD

V_BKfalling, VSEL_BK pin tied to AVDD

Buck regulator undervoltage lockout

hysteresis

V_{BK_UV_HYS}

Rising to falling threshold

200

mV

BUCK_CL = 0b

BUCK_CL = 1b

600

150

mA

Buck regulator Current limit threshold

(SPI Device)

I_{BK_CL}

Buck regulator Current limit threshold

(HW Device)

I_{BK_CL}

600

mA

Buck regulator Overcurrent protection

trip point

I_{BK_OCP}

2

3

1

4

A

t_{BK_RETRY}

Overcurrent protection retry time

ms

LOGIC-LEVEL INPUTS (DRVOFF, INHx, INLx, nSLEEP, SCLK, SDI)

V_IL

Input logic low voltage

0

1.5

1.6

180

95

0.6

5.5

V

Other Pins

V_IH

Input logic high voltage

nSLEEP

Other PIns

300

250

420 mV

V_HYS

I_IL

Input logic hysteresis

Input logic low current

Input logic high current

nSLEEP

V_PIN(Pin Voltage) = 0 V

nSLEEP, V_PIN(Pin Voltage) = 5 V

Other pins, V_PIN(Pin Voltage) = 5 V

nSLEEP

–1

1

30

µA

kΩ

pF

15

I_IH

30

75

150

70

200

100

30

300

130

R_PD

C_ID

Input pulldown resistance

Input capacitance

Other pins

LOGIC-LEVEL INPUTS (nSCS)

V_IL

Input logic low voltage

Input logic high voltage

Input logic hysteresis

Input logic low current

Input logic high current

Input pullup resistance

Input capacitance

0

1.5

0.6

5.5

V

V_IH

V_HYS

I_IL

180

300

420 mV

V_PIN(Pin Voltage) = 0 V

V_PIN(Pin Voltage) = 5 V

75

25

µA

kΩ

pF

I_IH

–1

80

R_PU

C_ID

100

30

130

12

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

FOUR-LEVEL INPUTS (GAIN, MODE, SLEW, VSEL_BK)

0.2*AVD

V_L1

V_L2

V_L3

V_L4

Input mode 1 voltage

Input mode 2 voltage

Input mode 3 voltage

Input mode 4 voltage

Tied to AGND

0

V

D

0.27*AV

DD

0.545*AV

DD

Hi-Z

0.5*AVDD

0.606*AV 0.757*AVD 0.909*AV

47 kΩ +/- 5% tied to AVDD

Tied to AVDD

DD

D

DD

0.94*AV

DD

AVDD

R_PU

R_PD

Input pullup resistance

To AVDD

To AGND

70

100

130

kΩ

Input pulldown resistance

FOUR-LEVEL INPUTS ( OCP/SR)

0.09*AV

DD

V_L1

V_L2

V_L3

V_L4

Input mode 1 voltage

Input mode 2 voltage

Input mode 3 voltage

Tied to AGND

22 kΩ ± 5% to AGND

Hi-Z

0

V

0.12*AV

DD

0.2*AVD

D

0.15*AVDD

0.5*AVDD

0.45*AV

DD

0.55*AV

DD

0.94*AV

DD

Tied to AVDD

AVDD

R_PU

R_PD

Input pullup resistance

To AVDD

To AGND

100

kΩ

Input pulldown resistance

OPEN-DRAIN OUTPUTS (nFAULT)

V_OL

I_OH

Output logic low voltage

Output logic high current

Output capacitance

I_OD= 5 mA

V_OD= 5 V

0.4

1

V

–1

µA

pF

C_OD

30

PUSH-PULL OUTPUTS (SDO)

V_OL

V_OH

I_OL

Output logic low voltage

I_OP= 5 mA

V_OP= 0 V

V_OP= 5 V

0

2.2

–1

0.4

5.5

1

V

Output logic high voltage

V

Output logic low leakage current

Output logic high leakage current

Output capacitance

µA

pF

I_OH

–1

1

C_OD

30

DRIVER OUTPUTS

V_VM> 6 V, I_OUT= 1 A, T_A= 25°C

V_VM< 6 V, I_OUT= 1 A, T_A= 25°C

V_VM> 6 V, I_OUT= 1 A, T_J= 150 °C

V_VM< 6 V, I_OUT= 1 A, T_J= 150 °C

95

100

130

mΩ

Total MOSFET on resistance (High-side

+ Low-side)

R_DS(ON)

V_VM= 24 V, SLEW = 00b or SLEW pin

tied to AGND

25

50

V/us

V_VM= 24 V, SLEW = 01b or SLEW pin to

Hi-Z

Phase pin slew rate switching low to high

(Rising from 20 % to 80 %)

SR

V_VM= 24 V, SLEW = 10b or SLEW pin to

47 kΩ +/- 5% to AVDD

125

200

V_VM= 24 V, SLEW = 11b or SLEW pin

tied to AVDD

Submit Document Feedback

13

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

V_VM= 24 V, SLEW = 00b or SLEW pin

tied to AGND

25

V/us

V_VM= 24 V, SLEW = 01b or SLEW pin to

Hi-Z

50

125

200

V/us

Phase pin slew rate switching high to low

(Falling from 80 % to 20 %

SR

V_VM= 24 V, SLEW = 10b or SLEW pin to

47 kΩ +/- 5% to AVDD

V_VM= 24 V, SLEW = 11b or SLEW pin

tied to AVDD

Leakage current on OUTx

V_OUTx= V_VM, nSLEEP = 1

V_OUTx= 0 V, nSLEEP = 1

5

1

mA

µA

I_LEAK

V_VM= 24 V, SR = 25 V/µs, HS driver ON

to LS driver OFF

2500

1200

750

3400

1550

1000

750

ns

V_VM= 24 V, SR = 50 V/µs, HS driver ON

to LS driver OFF

Output dead time (high to low / low to

high)

t_DEAD

V_VM= 24 V, SR = 125 V/µs, HS driver

ON to LS driver OFF

V_VM= 24 V, SR = 200 V/µs, HS driver

ON to LS driver OFF

500

V_VM= 24 V, INHx = 1 to OUTx

transisition, SR = 25 V/µs

3000

1300

950

3500

1700

1100

900

V_VM= 24 V, INHx = 1 to OUTx

transisition, SR = 50V/µs

Propagation delay (high-side / low-side

ON/OFF)

t_PD

V_VM= 24 V, INHx = 1 to OUTx

transisition, SR = 125 V/µs

V_VM= 24 V, INHx = 1 to OUTx

transisition, SR = 200 V/µs

700

ns

t_{MIN_PULSE}

Minimum output pulse width

SR = 200 V/µs

600

CURRENT SENSE AMPLIFIER

CSA_GAIN = 00

0.15

0.3

0.6

1.2

0.15

0.3

0.6

1.2

V/A

%

CSA_GAIN = 01

G_CSA

Current sense gain (SPI Device)

CSA_GAIN = 10

CSA_GAIN = 11

GAIN pin tied to AGND

GAIN pin to Hi-Z

G_CSA

Current sense gain (HW Device)

Current sense gain error

GAIN pin to 47 kΩ ± 5% to AVDD

GAIN pin tied to AVDD

T_A= 25°C, I_PHASE< 4A

T_A= 25°C, I_PHASE> 4A

I_PHASE< 4 A

–1.5

–3

1.5

3

%

G_{CSA_ERR}

–2.5

–5

2.5

5

%

I_PHASE> 4 A

%

T_A= 25°C

–3

3

%

Current sense gain error matching

between phases A, B and C

I_MATCH

–5

5

%

FS_POS

FS_NEG

Full scale positive current measurement

Full scale negative current measurement

8

A

–8

A

V_VREF

–

V_LINEAR

SOX output voltage linear range

0.25

V

0.25

Phase current = 0 A, G_CSA= 0.15 V/A

Phase current = 0 A, G_CSA= 0.3 V/A

Phase current = 0 A, G_CSA= 0.6 V/A

Phase current = 0 A, G_CSA= 1.2 V/A

–50

50 mA

I_OFFSET

Current sense offset low side current in

14

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

Step on SOX = 1.2 V, G_CSA= 0.15 V/A

Step on SOX = 1.2 V, G_CSA= 0.3 V/A

Step on SOX = 1.2 V, G_CSA= 0.6 V/A

Step on SOX = 1.2 V, G_CSA= 1.2 V/A

Phase current = 0 A

MIN

TYP

MAX UNIT

1

μs

t_SET

Settling time to ±1%, 30 pF

V_DRIFT

I_VREF

Drift offset

–80

80 µA/℃

VREF input current

VREF = 3.0 V

50

75

55

20

µA

dB

AVDD to SOx, DC

60

44

10

PSRR

Power Supply Rejection Ratio

AVDD to SOx, 10 kHz

AVDD to SOx, 500 kHz

Current limit corresponding to VLIM pin

voltage range

I_LIMIT

0

5

A

PROTECTION CIRCUITS

VM rising

VM falling

4.3

4.1

140

3

4.4

4.2

200

5

4.5

4.3

V

V_UVLOSupply undervoltage lockout (UVLO)

V_{UVLO_HYS}Supply undervoltage lockout hysteresis Rising to falling threshold

350 mV

t_UVLO

Supply undervoltage deglitch time

7

µs

V

Supply rising, OVP_EN = 1, OVP_SEL =

0

32.5

31.8

20

34

33

22

21

35

Supply falling, OVP_EN = 1, OVP_SEL

= 0

34.3

23

V

Supply overvoltage protection (OVP)

(SPI Device)

V_OVP

Supply rising, OVP_EN = 1, OVP_SEL =

1

Supply falling, OVP_EN = 1, OVP_SEL

= 1

19

22

Rising to falling threshold, OVP_SEL = 1

Rising to falling threshold, OVP_SEL = 0

0.9

0.7

1

0.8

5

1.1

0.9

V

Supply overvoltage protection (OVP)

(SPI Device)

V_{OVP_HYS}

t_OVP

Supply overvoltage deglitch time

µs

V

Supply rising

2.5

2.4

100

2.85

2.65

Charge pump undervoltage lockout

(above VM)

V_CPUV

Supply falling

V

V_{CPUV_HYS}Charge pump UVLO hysteresis

Rising to falling threshold

Supply rising

mV

V

2.7

2.5

3

V_{AVDD_UV}

Analog regulator undervoltage lockout

Supply falling

2.8

V

Analog regulator undervoltage lockout

hysteresis

V_{AVDD_ UV_HYS}

Rising to falling threshold

200

mV

OCP_LVL = 0b

10

15

10

15

16

24

20

28

A

Overcurrent protection trip point (SPI

Device)

OCP_LVL = 1b

I_OCP

OCP pin tied to AGND

OCP pin tied to AVDD

OCP_DEG = 00b

OCP_DEG = 01b

OCP_DEG = 10b

OCP_DEG = 11b

16

21.5

31

A

Overcurrent protection trip point (HW

Device)

24

A

0.2

0.6

1.1

1.6

µs

Overcurrent protection deglitch time

(SPI Device)

t_OCP

Overcurrent protection deglitch time

(HW Device)

0.2

µs

OCP_RETRY = 0

OCP_RETRY = 1

5

ms

Overcurrent protection retry time

(SPI Device)

t_RETRY

500

Overcurrent protection retry time

(HW Device)

t_RETRY

5

ms

Submit Document Feedback

15

DRV8316

www.ti.com

MAX UNIT

SLVSF16 – JANUARY 2021

T_J= –40°C to +150°C, V_VM= 4.5 to 35 V (unless otherwise noted). Typical limits apply for T_A= 25°C, V_VM= 24 V

PARAMETER

TEST CONDITIONS

MIN

135

10

TYP

145

15

T_OTW

Thermal warning temperature

Thermal warning hysteresis

Thermal shutdown temperature

Thermal shutdown hysteresis

Die temperature (T_J)

160

20

°C

T_{OTW_HYS}

T_TSD

Die temperature (T_J)

150

10

160

15

175

20

T_{TSD_HYS}

7.6 SPI Timing Requirements

MIN

NOM

MAX UNIT

t_READY

SPI ready after power up

nSCS minimum high time

nSCS input setup time

nSCS input hold time

1

ms

ns

t_{HI_nSCS}

t_{SU_nSCS}

t_{HD_nSCS}

t_SCLK

300

25

SCLK minimum period

SCLK minimum high time

SCLK minimum low time

SDI input data setup time

SDI input data hold time

SDO output data delay time

SDO enable delay time

SDO disable delay time

100

50

t_SCLKH

t_SCLKL

50

t_{SU_SDI}

t_{HD_SDI}

t_{DLY_SDO}

t_{EN_SDO}

t_{DIS_SDO}

25

50

7.7 SPI Slave Mode Timings

t_{HD_nSCS}

t_{HI_nSCS}

t_{SU_nSCS}

t_SCLK

t_SCLKH

t_SCLKL

X

MSB

LSB

X

t_{DIS_SDO}

t_{DLY_SDO}

t_{SU_SDI}

t_{HD_SDI}

Z

MSB

LSB

Z

t_{EN_SDO}

Figure 7-1. SPI Slave Mode Timings

16

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8 Detailed Description

8.1 Overview

The DRV8316 device is an integrated 95-mΩ (combined high-side and low-side MOSFET's on-state resistance)

driver for 3-phase motor-drive applications. The device reduces system component count, cost, and complexity

by integrating three half-bridge MOSFETs, gate drivers, charge pump, current sense amplifiers, linear regulator

for the external load and buck regulator. A standard serial peripheral interface (SPI) provides a simple method

for configuring the various device settings and reading fault diagnostic information through an external controller.

Alternatively, a hardware interface (H/W) option allows for configuring the most commonly used settings through

fixed external resistors.

The architecture uses an internal state machine to protect against short-circuit events, and protect against dv/dt

parasitic turnon of the internal power MOSFET.

The DRV8316 device integrates three, bidirectional current-sense amplifiers for monitoring the current level

through each of the half-bridges using a built-in current sense. The gain setting of the amplifier can be adjusted

through the SPI or hardware interface.

In addition to the high level of device integration, the DRV8316 device provides a wide range of integrated

protection features. These features include power-supply undervoltage lockout (UVLO), charge-pump

undervoltage lockout (CPUV), overcurrent protection (OCP), AVDD undervoltage lockout (AVDD_UV), buck

regulator ULVO for DRV8316R/T and overtemperature shutdown (OTW and OTSD). Fault events are indicated

by the nFAULT pin with detailed information available in the SPI registers on the SPI device version.

The DRV8316T and DRV8316R device are available in 0.5-mm pin pitch, VQFN surface-mount packages. The

VQFN package size is 7 mm × 5 mm.

Submit Document Feedback

17

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.2 Functional Block Diagram

V_VM

+

C_VM1

C_CP

VM

C_VM2

C_FLY

CPL

CP

CPH

To AVDD and

Buck Regulator

Replace Inductor (L_BK

)

with Resistor (R_BK) for

larger external load

or to reduce power

dissipation

Charge Pump

Regulators

I/O Control

Ext.

Load

Protection

AVDD

AGND

nSLEEP

V_VM

C_AVDD1

AVDD Linear Regulator

Overcurrent

Protection

DRVOFF

INHA

L_BK

Ext.

Load

SW_BK

Thermal Warning

Thermal Shutdown

C_BK

R_BK

V_VM

GND_BK

Buck Regulator

INLA

FB_BK

Input

Control

INHB

INLB

Predriver Stage

VCP

Power Stage

VM

INHC

HS Pre-

driver

INLC

VDD

OUTA

VLS

R_nFAULT

LS Pre-

driver

Digital Control

Output

Current

Sense for

Phase - A

nFAULT

PGND

ISEN_A

Predriver Stage

VCP

Power Stage

VM

Interface

SCLK

HS Pre-

driver

SPI

OUTB

SDI

Current Limit

AVDD

VLS

SOA

SOB

LS Pre-

driver

SDO

Current

Sense for

Phase - B

AVDD

PGND

SOC

nSCS

+

-

ILIM

ISEN_B

Predriver Stage

VCP

Power Stage

VM

Current Sense Amplifiers

HS Pre-

driver

VREF/

ILIM

ISEN_A

ISEN_B

ISEN_C

A_V

OUTC

SOC

SOB

SOA

VLS

A_V

Output Offset

Bias

LS Pre-

driver

Current

Sense for

Phase - C

PGND

ISEN_C

PGND

TPAD

Figure 8-1. DRV8316R Block Diagram

18

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

V_VM

+

C_VM1

C_CP

VM

C_VM2

C_FLY

CPL

CP

CPH

To AVDD and

Buck Regulator

Replace Inductor (L_BK

)

with Resistor (R_BK) for

larger external load

or to reduce power

dissipation

Charge Pump

Regulators

I/O Control

Ext.

Load

Protection

AVDD

AGND

nSLEEP

DRVOFF

V_VM

C_AVDD1

AVDD Linear Regulator

Overcurrent

Protection

L_BK

Ext.

Load

SW_BK

Thermal Warning

Thermal Shutdown

C_BK

R_BK

GND_BK

V_VM

INHA

INLA

INHB

INLB

INHC

Buck Regulator

FB_BK

Predriver Stage

VCP

Power Stage

VM

HS Pre-

driver

Input

Control

OUTA

INLC

VLS

LS Pre-

driver

Digital Control

Current

Sense for

Phase - A

MODE

SLEW

PGND

ISEN_A

Predriver Stage

VCP

Power Stage

VM

OCP/SR

GAIN

HS Pre-

driver

VSEL_BK

OUTB

Current Limit

VLS

SOA

SOB

VDD

LS Pre-

driver

R_nFAULT

Current

Sense for

Phase - B

Output

PGND

nFAULT

SOC

+

-

ILIM

ISEN_B

Predriver Stage

VCP

Power Stage

VM

Current Sense Amplifiers

HS Pre-

driver

VREF/

ILIM

ISEN_A

ISEN_B

ISEN_C

A_V

OUTC

SOC

SOB

SOA

VLS

A_V

Output Offset

Bias

LS Pre-

driver

Current

Sense for

Phase - C

PGND

ISEN_C

PGND

TPAD

Figure 8-2. DRV8316T Block Diagram

Submit Document Feedback

19

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3 Feature Description

Table 8-1 lists the recommended values of the external components for the driver.

Table 8-1. DRV8316 External Components

COMPONENTS

C_VM1

PIN 1

VM

PIN 2

PGND

RECOMMENDED

X5R or X7R, 0.1-µF, VM-rated capacitor

≥ 10-µF, VM-rated capacitor

C_VM2

VM

PGND

C_CP

CP

VM

X5R or X7R, 16-V, 1-µF capacitor

X5R or X7R, 10-nF, VM-rated capacitor

X5R or X7R, 1-µF, 6.3-V capacitor

X5R or X7R, buck-output rated capacitor

Output inductor

C_FLY

CPH

CPL

C_AVDD

C_BK

AVDD

SW_BK

VCC

AGND

GND_BK

FB_BK

L_BK

R_nFAULT

R_MODE

R_SLEW

R_OCP

nFAULT

5.1-kΩ, Pullup resistor

MODE

SLEW

OCP

AGND or AVDD

AGND

DRV8316 hardware interface

R_GAIN

GAIN

DRV8316 hardware interface

R_{VSEL_BK}

C_VREF

VSEL_BK

VREF/ILIM

DRV8316 hardware interface

X5R or X7R, 0.1-µF, VREF-rated capacitor (Optional)

Note

TI recommends to connect pull up on nFAULT even if it is not used to avoid undesirable entry into

internal test mode.

8.3.1 Output Stage

The DRV8316 device consists of an integrated 95-mΩ (combined high-side and low-side FET's on-state

resistance) NMOS FETs connected in a three-phase bridge configuration. A doubler charge pump provides the

proper gate-bias voltage to the high-side NMOS FET's across a wide operating-voltage range in addition to

providing 100% duty-cycle support. An internal linear regulator provides the gate-bias voltage for the low-side

MOSFETs. The device has three VM motor power-supply pins which are to be connected together to the motor-

supply voltage.

8.3.2 Control Modes

The DRV8316 family of devices provides four different control modes to support various commutation and

control methods. Table 8-2 shows the various modes of the DRV8316 device.

Table 8-2. PWM Control Modes

MODE Pin

(Hardware

Variant)

PWM_MODE Bits

(SPI Variant)

MODE Type

MODE

Connected to

AGND

PWM_MODE =

00b

Mode 1

Mode 2

Mode 3

Mode 4

6x Mode

PWM_MODE =

01b

Hi-Z

6x Mode with Current Limit

3x Mode

Connected to

AVDD with R_MODE

PWM_MODE =

10b

Connected to

AVDD

PWM_MODE = 11b

3x Mode with Current Limit

20

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Note

Texas Instruments does not recommend changing the MODE pin or PWM_MODE register during

operation of the power MOSFETs. Set all INHx and INLx pins to logic low before changing the MODE

pin or PWM_MODE register.

8.3.2.1 6x PWM Mode (MODE = 00b or MODE Pin Tied to AGND)

In 6x PWM mode, each half-bridge supports three output states: low, high, or high-impedance (Hi-Z). The

corresponding INHx and INLx signals control the output state as listed in Table 8-3.

Table 8-3. 6x PWM Mode Truth Table

INLx

INHx

PHASEx

0

1

0

1

0

1

Hi-Z

H

L

Hi-Z

Figure 8-3 shows the application diagram of DRV8316 configured in 6x PWM mode.

VM

OUTA

nSLEEP

INHA

INLA

INHB

VM

Controller

INLB

INHC

OUTB

Gate

Drive

and

Logic

OCP

BLDC

Motor

INLC

VM

MODE

GND

OUT3

GND

Figure 8-3. 6x PWM Mode

Submit Document Feedback

21

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.2.2 3x PWM Mode (MODE = 10b or MODE Pin is Connected to AGND with R_MODE

)

In 3x PWM mode, the INHx pin controls each half-bridge and supports two output states: low or high. The INLx

pin is used to put the half bridge in the Hi-Z state. If the Hi-Z state is not required, tie all INLx pins to logic high.

The corresponding INHx and INLx signals control the output state as listed in Table 8-4.

Table 8-4. 3x PWM Mode Truth Table

INLx

INHx

PHASEx

0

1

X

0

1

Hi-Z

L

H

Figure 8-4 shows the application diagram of DRV8316 configured in 3x PWM mode.

VM

OUTA

nSLEEP

INHA

INHB

INHC

VM

Controller

INLA

INLB

OUTB

Gate

Drive

and

Logic

OCP

BLDC

Motor

INLC

VM

AVDD

OUT3

MODE

GND

Figure 8-4. 3x PWM Mode

22

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.2.3 Current Limit Mode (MODE = 01b / 11b or MODE Pin is Hi-Z or Connected to AVDD)

Figure 8-5 shows the application diagram of DRV8316 configured in current limit mode. A current limit

comparator is used for the current limiting which input is generated with the three current sense amplifier's

outputs.

VM

OUTA

nSLEEP

Current

Sense

ISEN_A

INHA

VM

INLA

INHB

INLB

INHC

Controller

OUTB

Gate

Drive

and

Logic

Current

Sense

OCP

BLDC

Motor

ISEN_B

INLC

VM

Hi-Z /

Connected

to AVDD

MODE

OUT3

Current

Sense

ISEN_C

GND

Current Limit

SOA

SOB

ILIM

SOC

-

+

PWM Current Limit

Figure 8-5. Current Limit Mode

Submit Document Feedback

23

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.3 Device Interface Modes

The DRV8316 family of devices supports two different interface modes (SPI and hardware) to let the end

application design for either flexibility or simplicity. The two interface modes share the same four pins, allowing

the different versions to be pin-to-pin compatible. This compatibility lets application designers evaluate with one

interface version and potentially switch to another with minimal modifications to their design.

8.3.3.1 Serial Peripheral Interface (SPI)

The SPI devices support a serial communication bus that lets an external controller send and receive data with

the DRV8316. This support lets the external controller configure device settings and read detailed fault

information. The interface is a four wire interface using the SCLK, SDI, SDO, and nSCS pins which are

described as follows:

•

The SCLK pin is an input that accepts a clock signal to determine when data is captured and propagated on

the SDI and SDO pins.

•

The SDI pin is the data input.

The SDO pin is the data output. The SDO pin uses an open-drain structure and requires an external pullup

resistor.

•

The nSCS pin is the chip select input. A logic low signal on this pin enables SPI communication with the

DRV8316.

For more information on the SPI, see the Section 8.5 section.

8.3.3.2 Hardware Interface

Hardware interface devices convert the four SPI pins into four resistor-configurable inputs which are GAIN,

SLEW, MODE, and OCP.

This conversion lets the application designer configure the most common device settings by tying the pin logic

high or logic low, or with a simple pullup or pulldown resistor. This removes the requirement for an SPI bus from

the external controller. General fault information can still be obtained through the nFAULT pin.

•

The GAIN pin configures the gain of the current sense amplifier.

The SLEW pin configures the slew rate of the output voltage.

The MODE pin configures the PWM control mode.

The OCP/SR pin is used to configures the OCP level and active demagnetization modes.

For more information on the hardware interface, see the Section 8.3.10 section.

AVDD

R_SLEW

AVDD

SLEW

SCLK

SDI

AVDD

MODE

SPI

Interface

AVDD

VCC

R_PU

Hardware

Interface

OCP/SR

GAIN

SDO

nSCS

AVDD

Figure 8-7. DRV8316T Hardware Interface

Figure 8-6. DRV8316R SPI Interface

24

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.4 AVDD Linear Voltage Regulator

A 3.3-V, linear regulator is integrated into the DRV8316 family of devices and is available for use by external

circuitry. The AVDD regulator is used for powering up the internal digital circuitry of the DRV8316 device.

Additionally, this regulator can also provide the supply voltage for a low-power MCU or other circuitry supporting

low current (up to 30mA). The output of the AVDD regulator should be bypassed near the AVDD pin with an X5R

or X7R, 1-µF, 6.3-V ceramic capacitor routed directly back to the adjacent AGND ground pin.

The AVDD nominal, no-load output voltage is 3.3V.

VM

REF

+

œ

AVDD

AGND

External Load

C_AVDD

Figure 8-8. AVDD Linear Regulator Block Diagram

Use Equation 1 to calculate the power dissipated in the device by the AVDD linear regulator.

2 = (8_8/F 8_#8&&) × +_#8&&

(1)

For example, at a V_VMof 24 V, drawing 20 mA out of AVDD results in a power dissipation as shown in Equation

2.

P = 24 V - 3.3 V ì 20 mA = 414 mW

(

)

(2)

Submit Document Feedback

25

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.5 Step-Down Buck Regulator )

The DRV8316R and DRV8316T have an integrated buck regulator in conjunction with analog linear regulator to

supply regulated 3.3/5V power for an external controller or system voltage rail. Additionally, the buck output can

also be configured to 4/5.7V to support extra headroom for an external LDO generating a 3.3/5V supply. The

output voltage of the buck is set by the VSEL_BK pin in the DRV8316T device (hardware variant) and

BUCK_SEL bits in the DRV8316R device (SPI variant).

The buck regulator has a very-low quiescent current during light loads to prolong battery life. The device

improves performance during line and load transients by implementing a pulse-frequency current-mode control

scheme which requires less output capacitance and simplifies frequency compensation design.

8.3.5.1 Buck Inductor Mode

The buck regulator in DRV8316 device is primarily designed to support low inductance of 47µH and 22µH

inductors. The 47µH inductor allows the buck regulator to operate up to 200 mA load current support, whereas

the 22µH inductor limits the load current to 50 mA.

Figure 8-9 shows the connection of buck regulator in inductor mode.

VM

SW_BK

Ext. Load

V_BK

Control

L_BK

C_BK

GND_BK

FB_BK

Figure 8-9. Buck (Inductor Mode)

8.3.5.2 Buck Resistor mode

If the external load requirement is less than 40 mA, the inductor can be replaced with a resistor. In resistor mode,

power is dissipated from the external resistor and the efficiency is lower than inductor mode.

Figure 8-10 shows the connection of buck regulator in resistor mode.

VM

SW_BK

Ext. Load

V_BK

Control

R_BK

C_BK

GND_BK

FB_BK

Figure 8-10. Buck (Resistor Mode)

26

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.5.3 Buck Regulator with External LDO

The buck regulator in the DRV8316 device also supports the voltage requirement to feed to an external LDO to

generate the standard 3.3V/5V output rail. The buck output voltage is configured to 4V or 5.7V to provide an

extra headroom to support the external LDO for generating a 3.3V or 5V rail as shown in Figure 8-11. This allows

a lower-voltage LDO design to save cost and better thermal management due to low drop-out voltage.

VM

V_LDO

(3.3V / 5V)

V_BK

SW_BK

(4V / 5.7V)

V_IN

V_LDO

Ext. Load

C_LDO

Control

L_BK

3.3V / 5V

LDO

C_BK

GND_BK

FB_BK

GND

External LDO

GND

Figure 8-11. Buck Regulator with External LDO

Submit Document Feedback

27

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.5.4 LDO Power Sequencing on Buck Regulator

The LDO of DRV8316R and DRV8316T devices has an option of accepting the power supply from buck

regulator to reduce power dissipation. The power sequencing mode in the DRV8316R and DRV8316T device

allows on-the-fly changeover of the LDO power supply from the DC mains (VM) to buck output (VBK) as shown

in Figure 8-12. This sequencing automatically happens in the hardware device when the buck voltage is set to

either 5V or 5.7V. For disabling the power sequencing in the SPI device, set the BUCK_PS_DIS bit to 1.

VM

SW_BK

Ext. Load

V_BK

Control

L_BK

C_BK

GND_BK

FB_BK

AVDD_PS

V_BK

VM

REF

+

œ

AVDD

AGND

External Load

C_AVDD

Figure 8-12. LDO Power Sequencing on Buck Regulator

28

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.5.5 Buck Operation and Control

The buck regulator in DRV8316R and DRV8316T implements a pulse frequency modulation (PFM) architecture

with peak current mode control. The output voltage of the buck regulator is compared with the reference voltage

(V_{BK_REF}) which is internally generated depending on the buck-output voltage setting (VSEL_BK pin or

BUCK_SEL bits) which constitutes an outer voltage control loop. Now, depending on the comparator output

going high (V_BK< V_{BK_REF}) or low (V_BK> V_{BK_REF}), the high-side power FET of the buck turns on and off

respectively. An independent current control loop monitors the current in the high-side power FET (I_BK) and turns

off the high-side FET when the current becomes higher than the buck current limit (I_{BK_CL}). This implements a

current limit control for the buck regulator. Figure 8-13 shows the architecture of the buck and various control/

protection loops to avoid unwanted scenarios.

Slew Rate

Control

SW_BK

I_BK

Ext. Load

V_BK

VM

L_BK

PWM Control

and Driver

C_BK

GND_BK

I_BK

+

Current Limit

OC Protection

UV Protection

_

I_{BK_CL}

I_BK

+

_

I_{BK_OCP}

FB_BK

V_BK

+

_

V_{BK_UVLO}

VM

V_BK

+

_

Voltage Control

V_{BK_REF}

VSEL_BK

Buck

(HW Device)

Reference

Voltage

Generator

Buck Control

BUCK_SEL

(SPI Device)

Figure 8-13. Buck Operation and Control Loops

Submit Document Feedback

29

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.5.6 Buck Undervoltage Protection

If at any time the input supply voltage on the FB_BK pin falls lower than the V_{BK_UVLO}threshold, all of the both

high-side and low-side MOSFETs of the buck regulator are disabled and the nFAULT pin is driven low. The

FAULT, BK_FLT and BUCK_UV bits are also latched high in the registers on SPI devices. Normal operation

starts again (buck operation and the nFAULT pin is released) when the VBK undervoltage condition clears. The

BUCK_UV bit stays set until cleared through the CLR_FLT bit or an nSLEEP pin reset pulse (t_RST).

8.3.5.7 Buck Overcurrent Protection

The overcurrent event is sensed by monitoring the current flowing through high-side MOSFET of the buck

regulator. If the current across high-side MOSFET exceeds the I_{BK_OCP}threshold for longer than the t_{OCP_DEG}

deglitch time, a buck OCP event is recognized and nFAULT pin is driven low. The FAULT, BK_FLT and BK_OCP

bits are latched high in the SPI registers. Normal operation starts again automatically (buck operation and the

nFAULT pin is released) after the t_RETRYtime elapses. The FAULT, BK_FLT and BK_OCP bits stay latched until

the t_RETRYperiod expires.

On hardware interface devices, the I_{BK_OCP}threshold is set to 600-mA, whereas on SPI devices, the I_{BK_OCP}

threshold is set through the BUCK_CL bit to either to 600-mA or 150-mA.

30

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.6 Charge Pump

Because the output stages use N-channel FETs, the device requires a gate-drive voltage higher than the VM

power supply to enhance the high-side FETs fully. The DRV8316 integrates a charge-pump circuit that generates

a voltage above the VM supply for this purpose.

The charge pump requires two external capacitors for operation. See the block diagram, pin descriptions and

see section (Table 8-1 ) for details on these capacitors (value, connection, and so forth).

The charge pump shuts down when nSLEEP is low.

VM

C_CP

CP

CPH

VM

Charge

Pump

Control

C_FLY

CPL

Figure 8-14. DRV8316 Charge Pump

Submit Document Feedback

31

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.7 Slew Rate Control

An adjustable gate-drive current control to the MOSFETs of half-bridges is implemented to achieve the slew rate

control. The MOSFET VDS slew rates are a critical factor for optimizing radiated emissions, energy and duration

of diode recovery spikes, and switching voltage transients related to parasitics. These slew rates are

predominantly determined by the rate of gate charge to internal MOSFETs as shown in Figure 8-15.

VM

VCP (Internal)

Slew Rate

Control

OUTx

VCP (Internal)

Slew Rate

Control

GND

Figure 8-15. Slew Rate Circuit Implementation

The slew rate of each half-bridge can be adjusted by the SLEW pin in hardware device variant or by using the

SLEW bits in SPI device variant. Each half-bridge can be selected to either of a slew rate setting of 25-V/µs, 50-

V/µs, 125-V/µs or 200-V/µs. The slew rate is calculated by the rise time and fall time of the voltage on OUTx pin

as shown in Figure 8-16.

V_OUTx

VM

80%

20%

0

Time

t_fall

t_rise

Figure 8-16. Slew Rate Timings

32

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.8 Cross Conduction (Dead Time)

The device is fully protected for any cross conduction of MOSFETs. In half-bridge configuration, the operation of

high-side and low-side MOSFETs are ensured to avoid any shoot-through currents by inserting a dead time

(t_dead). This is implemented by sensing the gate-source voltage (VGS) of the high-side and low-side MOSFETs

and ensuring that VGS of high-side MOSFET has reached below turn-off levels before switching on the low-side

MOSFET of same half-bridge as shown in Figure 8-17 and Figure 8-18.

VM

Gate

Control

+

VGS

HS

LS

œ

OUTx

Gate

Control

+

GND

VGS

œ

Figure 8-17. Cross Conduction Protection

OUTx HS

OUTx

Gate

(VGS_HS)

10%

t_DEAD

OUTx

Gate

(VHS_LS)

10%

OUTx LS

Time

Figure 8-18. Dead Time

Submit Document Feedback

33

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.9 Propagation Delay

The propagation delay time (t_pd) is measured as the time between an input logic edge to change in gate driver

voltage. This time has three parts consisting of the digital input deglitcher delay, analog driver, and comparator

delay.

The input deglitcher prevents high-frequency noise on the input pins from affecting the output state of the gate

drivers. To support multiple control modes, a small digital delay is added as the input command propagates

through the device.

INx

OUTx High

t_PD

20%

OUTx Low

OUTx

Time

Figure 8-19. Propagation Delay Timing

8.3.9.1 Driver Delay Compensation

DRV8316 monitors the prorogation delay internally and adds a variable delay on top of it to provide fixed delay

as shown in Figure 8-20 and Figure 8-21. Delay compensation feature reduces uncertainty caused in timing of

current measurement and also reduces duty cycle distortion caused due to propagation delay.

The fixed delay is summation of propagation delay (t_PD) caused to internal driver delay and variable delay (t_VAR

)

added to compensate for uncertainty. The fixed delay can be configured through DLY_TARGET register. Refer

Table 8-5 for recommendation on configuration for DLY_TARGET for different slew rate settings.

Delay compensation is only available in SPI variant DRV8316R and can be enabled by configuring DLYCMP_EN

and DLY_TARGET. It is disabled in hardware variant DRV8316T

INLx

INHx

1V

OUTx

Time

t_VAR

t_PD

t_VAR

t_PD

DLY_TARGET

Figure 8-21. Delay Compensation with current

flowing into the phase

Figure 8-20. Delay Compensation with current

flowing out of phase

34

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Table 8-5. Delay Target Recommendation

SLEW RATE

200 V/μs

125 V/μs

50 V/μs

DLY_TARGET

DLY_TARGET = 0x5 (1.2 μs)

DLY_TARGET = 0x8 (1.8 μs)

DLY_TARGET = 0xB (2.4 μs)

DLY_TARGET = 0xF (3.2 μs)

25 V/μs

Submit Document Feedback

35

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.10 Pin Diagrams

This section presents the I/O structure of all digital input and output pins.

8.3.10.1 Logic Level Input Pin (Internal Pulldown)

Figure 8-22 shows the input structure for the logic level pins, DRVOFF, INHx, INLx, nSLEEP, SCLK and SDI.

The input can be with a voltage or external resistor. It is recommended to put these pins low in device sleep

mode to reduce leakage current through internal pull-down resistors.

AVDD

STATE

V_IH

CONNECTION

Tied to AVDD

Tied to GND

INPUT

Logic High

Logic Low

V_IL

R_PD

ESD

Figure 8-22. Logic-Level Input Pin Structure

8.3.10.2 Logic Level Input Pin (Internal Pullup)

Figure 8-23 shows the input structure for the logic level pin, nSCS. The input can be driven with a voltage or

external resistor.

AVDD

STATE

V_IH

CONNECTION

Tied to AVDD

Tied to GND

INPUT

R_PU

Logic High

Logic Low

V_IL

ESD

Figure 8-23. Logic nSCC

8.3.10.3 Open Drain Pin

Figure 8-24 shows the structure of the open-drain output pin, nFAULT. The open-drain output requires an

external pullup resistor to function properly.

AVDD

STATE

No Fault

Fault

STATUS

Pulled-Up

R_PU

OUTPUT

Inactive

Active

Pulled-Down

ESD

Figure 8-24. Open Drain

8.3.10.4 Push Pull Pin

Figure 8-25 shows the structure of push-pull pin, SDO.

36

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

AVDD

STATE

V_OH

STATUS

Pulled-Up

OUTPUT

Logic High

Logic Low

V_OL

Pulled-Down

ESD

Figure 8-25. Push Pull

8.3.10.5 Four Level Input Pin

Figure 8-26 shows the structure of the four level input pins, GAIN, MODE, SLEW, OCP/SR and VSEL_BK on

hardware interface devices. The input can be set with an external resistor.

CONTROL

AVDD

STATE

V_L1

RESISTANCE

Tied to AGND

Setting-1

Setting-2

Setting-3

Setting-4

+

R_PU

œ

Hi-Z (>2000 kΩ to

AGND)

V_L2

V_L3

V_L4

+

R_PD

47 kΩ ±5%

to AVDD

œ

Tied to AVDD

+

œ

Figure 8-26. Four Level Input Pin Structure

Submit Document Feedback

37

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.11 Current Sense Amplifiers

The DRV8316 integrates three, high-performance low-side current sense amplifiers for current measurements

using built-in current sensing. Low-side current measurements are commonly used to implement overcurrent

protection, external torque control, or brushless-DC commutation with an external controller. All three amplifiers

can be used to sense the current in each of the half-bridge legs (low-side FETs). The current sense amplifiers

include features such as programmable gain and external reference is provided on a voltage reference pin

(VREF).

8.3.11.1 Current Sense Amplifier Operation

The SOx pin on the DRV8316 outputs an analog voltage proportional to current flowing in the low side FETs

multiplied by the gain setting (G_CSA). The gain setting is adjustable between four different levels which can be

set by the GAIN pin (in hardware device variant) or the GAIN bits (in SPI device variant).

Figure 8-27 shows the internal architecture of the current sense amplifiers. The current sense is implemented

with the sense FET on each low-side FET of the DRV8316 device. This current information is fed to the interal

I/V converter, which generates the CSA output voltage on the SOX pin based on the voltage on VREF pin and

the Gain setting. The CSA output voltage can be calculated as :

8

^4'(W

51: = @

A ± )#+0 × +_176:

2

(3)

VM

VREF

OUTX

Sense

FET

GAIN

I/V Converter

PGND

SOX

Figure 8-27. Integrated Current Sense Amplifier

38

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Figure 8-28 and Figure 8-29 show the detail of the amplifier operational range. In bi-directional operation, the

amplifier output for 0-V input is set at VREF / 2. Any change in the differential input results in a corresponding

change in the output times the CSA_GAIN factor. The amplifier has a defined linear region in which it can

maintain operation.

SOX

VREF

V

VREF

œ 0.25 V

œI_OUTx

V

SO(rangeœ)

V

SO(off)max

/ 2

V , V

OFF DRIFT

0 V

V

VREF

V

SO(off)min

V

SO(range+)

I_OUTx

0.25 V

0 V

Figure 8-28. Bidirectional Current Sense Output

SOX (V)

V_REF

V_{REF / 2}

V_LINEAR

I_OUTx(A) (Current flowing into the FET)

Figure 8-29. Bidirectional Current Sense Regions

Submit Document Feedback

39

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.12 Active Demagnetization

DRV8316 family of devices has smart rectification features (actice demagnetization) which reduces power losses

in device by reducing diode conduction losses. When this feature is enabled device automatically turns ON FET

whenever it detects diode conduction. This feature can be configured with the OCP/SR pins in hardware

variants. In SPI device variants this can be configured through EN_ASR and EN_AAR bits. The smart

rectification is classified into two categories of automatic synchronous rectification (ASR) mode and automatic

asynchronous rectification (AAR) mode which are described in sections below.

Note

In SPI device variants both bits, EN_ASR and EN_AAR needs to set to 1 to enable active

demagnetization.

The DRV8316 device includes a high-side (AD_HS) and low-side (AD_LS) comparator which detects the

negative flow of current in the device on each half-bridge. The AD_HS comparator compares the sense-FET

output with the supply voltage (VM) threshold, whereas the AD_LS compatator compares with the ground (0-V)

threshold. Depending upon the flow of current from OUTx to VM or PGND to OUTx, the AD_HS or the AD_LS

comparator trips. This comparator provides a reference point for the operation of active demagnetization feature.

VM

AD_HS

Comparator

+

-

Sense

FET

(To Digital)

OUTX

VM

+

-

Sense

FET

AD_LS

Comparator

0V (GND)

PGND

VREF

I/V Converter

SOX

GAIN

Figure 8-30. Active Demagnetization Operation

Table 8-6 shows the configuration of ASR and AAR mode in the DRV8316 device.

Table 8-6. PWM_MODE Configuration

OCP/SR Pin (Hardware

MODE Type

Mode 1

SR Bits (SPI Variant)

EN_ASR = 0, EN_AAR = 0

OCP Setting

16 A

ASR and AAR Mode

ASR and AAR Disabled

Variant)

Connected to AGND

Connected to AGND with

R_MODE1

Mode 2

24 A

Mode 3

Mode 4

Hi-Z

EN_ASR = 1, EN_AAR = 1

16 A

24 A

ASR and AAR Enabled

Connected to AVDD

40

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.12.1 Automatic Synchronous Rectification Mode (ASR Mode)

The automatic synchronous rectification (ASR) mode is divided into two categories of ASR during commutation

and ASR during PWM mode.

8.3.12.1.1 Automatic Synchronous Rectification in Commutation

Figure 8-31 shows the operation of active demagnetization during the BLDC motor commutation. As shown in

Figure 8-31 (a), the current is flowing from HA to LC in one commutation state. During the commutation

changeover as shown in Figure 8-31 (b), the HC switch is turned on, whereas the commutation current (due to

motor inductance) in OUTA flows through the body diode of LA. This incorporates a higher diode loss depending

on the commutation current. This commutation loss is reduced by turning on the LA for the commutation time as

shown in Figure 8-31 (c).

Similarly the operation of high-side FET is realized in Figure 8-31 (d), (e) and (f).

VM

HB

HC

HA

HB

HC

HA

OUTA

OUTB

OUTC

LA

LB

LC

LA

LB

LC

(a) Current flowing from HA to LC

VM

(d) Current flowing from HC to LA

VM

Decay Current

HB

HC

HB

OUTA

LB

HC

HA

OUTA

OUTB

LA

LB

LC

LA

LC

(e) Decay current with AD disabled

VM

(b) Decay current with AD disabled

VM

Decay Current

HB

HC

HB

OUTA

LB

HC

HA

OUTA

OUTB

LA

LB

LC

LA

LC

(c) Decay current with AD enabled

(f) Decay current with AD enabled

Figure 8-31. ASR in BLDC Motor Commutation

Submit Document Feedback

41

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Figure 8-32 (a) shows the BLDC motor phase current waveforms for automatic synchronous rectification mode in

BLDC motor operating with trapezoidal commutation. This figure shows the operation of various switches in a

single commutation cycle.

Figure 8-32 (b) shows the zoomed waveform of commutation cycle with details on the ASR mode start with

margin time (t_margin) and ASR mode early stop due to active demag. comparator threshold and delays.

Current Limit

Phase ”A‘

Current

LA

HA

HA, LB

HB, LC

HB, LA

HC, LA

HC, LB

HA, LC

(a) Commutation current of Phase —A“

t_margin

t_dead

HA Conducts

LA Body Diode

Conducts

HA Body Diode

Conducts

Phase ”A‘

Current

LA Conducts

t_dead

HC, LA

HC, LB

HA, LC

HB, LC

(b) Zoomed waveform of Active Demagnetization

Figure 8-32. Current Waveforms for ASR in BLDC Motor Commutation

42

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.12.1.2 Automatic Synchronous Rectification in PWM Mode

Figure 8-33 shows the operation of ASR in PWM mode. As shown in this figure, a PWM is applied only on the

high-side FET, whereas the low-side FET is always off. During the PWM off time, current decays from the low-

side FET which results in higher power losses. Therefore, this mode supports turning on the low-side FET during

the low-side diode conduction.

PWM_HS

(Applied)

&t

PWM_LS

(Applied)

&t

PWM_HS

(Actual)

&t

PWM_LS

(Actual)

&t

I_a

&t

ASR Mode Disabled

ASR Mode Enabled

Figure 8-33. ASR in PWM Mode

Submit Document Feedback

43

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.12.2 Automatic Asynchronous Rectification Mode (AAR Mode)

Figure 8-34 shows the operation of AAR in PWM mode. As shown in this figure, a PWM is applied in a

synchronous rectification to the high-side and low-side FETs. During the low-side FET conduction, for lower

inductance motors, the current can decay to zero and becomes negative since low side FET is in on-state. This

creates a negative torque on the BLDC motor operation. When AAR mode is enabled, the current during the

decay is monitored and the low-side FET is turned off as soon as the current reaches near to zero. This saves

the negative current building in the BLDC motor which results in better noise performance and better thermal

management.

PWM_HS

(Applied)

&t

PWM_LS

(Applied)

&t

PWM_HS

(Actual)

&t

PWM_LS

(Actual)

&t

I_a

&t

AAR Mode Disabled

AAR Mode Enabled

Figure 8-34. AAR in PWM Mode

44

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.13 Cycle-by-Cycle Current Limit

The current-limit circuit activates if the current flowing through the low-side MOSFET exceeds the I_LIMITcurrent.

This feature restricts motor current to less than the I_LIMIT

.

The current-limit circuitry utilizes the current sense amplifier output of the three phases compared with the

voltage at ILIM pin. Figure 8-35 shows the implementation of current limit circuitry. As shown in this figure, the

output of current sense amplifiers is combined with star connected resistive network. This measured voltage

V_MEASis compared with the external reference voltage e V_ILIMpin to realize the current limit implementation. The

relation between current sensed on OUTX pin and V_MEASthreshold is given as:

8

^#8&&W

: ;

¤

A F k +_176#+ +_176$+ +_176%× )#+0 3o

8_/'#5= @

2

(4)

where

•

AVDD is 3.3-V LDO output

OUTX is current flowing into the low-side MOSFET

GAIN is the CSA gain setting

The I_LIMITthreshold can be adjusted by configuring ILIM pin between AVDD/2 to (AVDD/2 - 0.4) V. AVDD/2 is

minimum value and when it is applied on ILIM pin cycle by cycle current limit is disabled, whereas maximum

threshold of 8A can be configured by applying (AVDD/2 - 0.4) V on ILIM pin. The relation between current

sensed on OUTX pin and ILIMIT threshold is given as:

VM

AVDD

I/V Converter

SOA

OUTA

Sense

FET

GAIN

PGND

SOB

To PWM

V_MEAS

V_ILIM

Controller

-

+

ILIM

SOC

Figure 8-35. Current Limit Implementation

When then the current limit activates, the high-side FET is disabled until the beginning of the next PWM cycle as

shown in Figure 8-36. The low-side FETs can operate in brake mode or high-Z mode by configuring the

ILIM_RECIR bit in the SPI device variant.

Submit Document Feedback

45

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

PWM

OUTx

I_LIMIT

Bridge Operating in

Brake Mode

I_BRIDGE

Time

Figure 8-36. Cycle-by-Cycle Current-Limit Operation

46

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Figure 8-37 shows the operation of driver in brake mode, where the current recirculates through low-side FETs

while the high-side FETs are disabled.

Figure 8-38 shows the operation of driver in hi-Z mode, where the current recirculates through the body diodes

of the low-side FETs while the high-side FETs are disabled.

VM

HB

HC

HA

HB

HC

HA

X

OUTA

OUTB

OUTC

LA

LB

LC

LA

LB LC

X X X

Figure 8-37. Brake State

Figure 8-38. Coast State

Note

The current-limit circuit is ignored immediately after the PWM signal goes active for a short blanking

time to prevent false trips of the current-limit circuit.

Note

During the brake operation, a high-current can flow through the low-side FETs which can eventually

trigger the over current protection circuit. This allows the body-diode of the high-side FET to conduct

and pump brake energy to the VM supply rail.

Submit Document Feedback

47

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.13.1 Cycle by Cycle Current Limit with 100% Duty Cycle Input

In case of 100% duty cycle applied on PWM input, there is no edge available to turn high-side FET back on. To

overcome this problem, DRV8316 has built in internal PWM clock which is used to turn high-side FET back on

once it is disabled after exceeding I_LIMITthreshold. In SPI variant DRV8316R , this internal PWM clock can be

configured to either 20 kHz or 40 kHz through PWM_100_DUTY_SEL. In H/W variant DRV8316T PWM internal

clock is set to 20 kHz. Figure 8-39 shows operation with 100 % duty cycle.

PWM

Internal

PWM

OUTx

ILIMIT

Bridge Operating in

Brake Mode

Time

Figure 8-39. Cycle-by-Cycle Current-Limit Operation with 100% PWM Duty Cycle

48

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.14 Protections

The DRV8316 family of devices is protected against VM undervoltage, charge pump undervoltage, and

overcurrent events. Table 8-7 summarizes various faults details.

Table 8-7. Fault Action and Response (SPI Devices)

FAULT

CONDITION

CONFIGURATION

REPORT

H-BRIDGE

LOGIC

RECOVERY

Automatic:

V_VM> V_{UVLO_R}

CLR_FLT, nSLEEP Reset Pulse (NPOR

bit)

VM undervoltage

(NPOR)

V_VM< V_UVLO

—

Hi-Z

Disabled

Automatic:

V_AVDD> V_{AVDD_UV_R}

CLR_FLT, nSLEEP Reset Pulse (NPOR

bit)

AVDD undervoltage

(NPOR)

V_AVDD< V_{AVDD_UV}

V_{FB_BK}< V_{BK_UV}

V_CP< V_CPUV

—

nFAULT

Hi-Z

Active

Hi-Z

Disabled

Active

Automatic:

V_{FB_BK}> V_{BUCK_UV_R}

CLR_FLT, nSLEEP Reset Pulse

(BUCK_UV bit)

Buck undervoltage

(BUCK_UV)

Automatic:

V_VCP> V_CPUV

CLR_FLT, nSLEEP Reset Pulse

(VCP_UV bit)

Charge pump

undervoltage

(VCP_UV)

Active

OVP_EN = 0b

OVP_EN = 1b

None

Active

Hi-Z

Active

No action (OVP Disabled)

OverVoltage

Protection

(OVP)

Automatic:

V_VM< V_OVP

CLR_FLT, nSLEEP Reset Pulse (OVP bit)

V_VM> V_OVP

FAULT

Latched:

CLR_FLT, nSLEEP Reset Pulse (OCP

bits)

OCP_MODE = 00b

OCP_MODE = 01b

nFAULT

Hi-Z

Active

Retry:

t_RETRY

Overcurrent

Protection

(OCP)

I_PHASE> I_OCP

Automatic:

CLR_FLT, nSLEEP Reset Pulse (OCP

bits)

OCP_MODE = 10b

OCP_MODE = 11b

—

nFAULT

None

Active

No action

Buck Overcurrent

Protection

(BUCK_OCP)

Retry:

t_RETRY

I_BK> I_{BK_OC}

nFAULT

Automatic:

CLR_FLT, nSLEEP Reset Pulse

(SPI_FLT bit)

SPI_FLT_REP = 0b

nFAULT

Active

SPI Error

(SPI_FLT)

SCLK fault and ADDR

fault

SPI_FLT_REP = 1b

—

None

nFAULT

None

Active

Hi-Z

Active

No action

OTP Error

(OTP_ERR)

Latched:

OTP reading is erroneous

T_J> T_OTW

Power Cycle, nSLEEP Reset Pulse

OTW_REP = 0b

Active

No action

Thermal warning

(OTW)

Automatic:

T_J< T_OTW– T_HYS

CLR_FLT, nSLEEP Pulse (OTW bit)

OTW_REP = 1b

—

nFAULT

Active

Hi-Z

Active

Automatic:

T_J< T_OTSD– T_HYS

CLR_FLT, nSLEEP Pulse (OTS bit)

Thermal shutdown

(OTSD)

T_J> T_OTSD

Submit Document Feedback

49

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.3.14.1 VM Supply Undervoltage Lockout (NPOR)

If at any time the input supply voltage on the VM pin falls lower than the V_UVLOthreshold (VM UVLO falling

threshold), all of the integrated FETs, driver charge-pump and digital logic controller are disabled as shown in

Figure 8-40. Normal operation resumes (driver operation) when the VM undervoltage condition is removed. The

NPOR bit is reset and latched low in the IC status (IC_STAT) register once the device presumes VM. The NPOR

bit remains in reset condition until cleared through the CLR_FLT bit or an nSLEEP pin reset pulse (t_RST).

V_UVLO(max) rising

V_UVLO(min) rising

V_UVLO(max) falling

V_UVLO(min) falling

V_VM

DEVICE ON

DEVICE OFF

DEVICE ON

Time

Figure 8-40. VM Supply Undervoltage Lockout

8.3.14.2 AVDD Undervoltage Lockout (AVDD_UV)

If at any time the voltage on AVDD pin falls lower than the V_{AVDD_UV}threshold, all of the integrated FETs, driver

charge-pump and digital logic controller are disabled. Normal operation resumes (driver operation) when the

AVDD undervoltage condition is removed. The NPOR bit is reset and latched low in the IC status (IC_STAT)

register once the device presumes VM. The NPOR bit remains in reset condition until cleared through the

CLR_FLT bit or an nSLEEP pin reset pulse (t_RST).

8.3.14.3 BUCK Undervoltage Lockout (BUCK_UV)

If at any time the voltage on VFB_BK pin falls lower than the V_{BK_UV}threshold, the integrated FETs of the buck

regulator are disabled while the driver FETs, charge pump, and digital logic control continue to operate normally.

The nFAULT pin is driven low in the event of a buck undervoltage fault, and the BK_FLT bit in IC_STAT register

is set in SPI devices. The FAULT and BUCK_UV bits are also latched high in the registers on SPI devices.

Normal operation starts again (buck regulator operation and the nFAULT pin is released) when the BUCK

undervoltage condition clears. The BK_FLT and BUCK_UV bits stay set until cleared through the CLR_FLT bit or

an nSLEEP pin reset pulse (t_RST).

8.3.14.4 VCP Charge Pump Undervoltage Lockout (CPUV)

If at any time the voltage on the VCP pin (charge pump) falls lower than the V_CPUVthreshold voltage of the

charge pump, all of the integrated FETs are disabled and the nFAULT pin is driven low. The FAULT and VCP_UV

bits are also latched high in the registers on SPI devices. Normal operation starts again (driver operation and the

nFAULT pin is released) when the VCP undervoltage condition clears. The CPUV bit stays set until cleared

through the CLR_FLT bit or an nSLEEP pin reset pulse (t_RST). The CPUV protection is always enabled in both

hardware and SPI device varaints.

8.3.14.5 Overvoltage Protections (OV)

If at any time input supply voltage on the VM pins rises higher lower than the V_OVPthreshold voltage, all of the

integrated FETs are disabled and the nFAULT pin is driven low. The FAULT and OVP bits are also latched high

in the registers on SPI devices. Normal operation starts again (driver operation and the nFAULT pin is released)

when the OVP condition clears. The OVP bit stays set until cleared through the CLR_FLT bit or an nSLEEP pin

50

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

reset pulse (t_RST). Setting the OVP_EN bit high on the SPI devices enables this protection feature. On hardware

interface devices, the OVP protection is always enabled and set to a 32-V threshold.

The OVP threshold is also programmable on the SPI device variant. The OVP threshold can be set to 20-V or

32-V based on the OVP_SEL bit.

V_VM

V_OVP(max) rising

V_OVP(min) rising

V_OVP(max) falling

V_OVP(min) falling

DEVICE ON

DEVICE OFF

DEVICE ON

nFAULT

Time

Figure 8-41. Over Voltage Protection

8.3.14.6 Overcurrent Protection (OCP)

A MOSFET overcurrent event is sensed by monitoring the current flowing through FETs. If the current across a

FET exceeds the I_OCPthreshold for longer than the t_OCPdeglitch time, an OCP event is recognized and action is

done according to the OCP_MODE bit. On hardware interface devices, the I_OCPthreshold is set via OCP/SR pin,

the t_{OCP_DEG}is fixed at 0.2-µs, and the OCP_MODE bit is configured for 5-ms automatic retry. On SPI devices,

the I_OCPthreshold is set through the OCP_LVL SPI register, the t_{OCP_DEG}is set through the OCP_DEG SPI

register, and the OCP_MODE bit can operate in four different modes: OCP latched shutdown, OCP automatic

retry, OCP report only, and OCP disabled.

8.3.14.6.1 OCP Latched Shutdown (OCP_MODE = 00b)

After a OCP event in this mode, all MOSFETs are disabled and the nFAULT pin is driven low. The FAULT, OCP,

and corresponding FET's OCP bits are latched high in the SPI registers. Normal operation starts again (driver

operation and the nFAULT pin is released) when the OCP condition clears and a clear faults command is issued

either through the CLR_FLT bit or an nSLEEP reset pulse (t_RST).

Submit Document Feedback

51

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Peak Current due

to deglitch time

I_OCP

I_OUTx

t_OCP

nFAULT Released

nFAULT Pulled High

Fault Condition

nFAULT

Clear Fault

Time

Figure 8-42. Overcurrent Protection - Latched Shutdown Mode

8.3.14.6.2 OCP Automatic Retry (OCP_MODE = 01b)

After a OCP event in this mode, all the FETs are disabled and the nFAULT pin is driven low. The FAULT, OCP,

and corresponding FET's OCP bits are latched high in the SPI registers. Normal operation starts again

automatically (driver operation and the nFAULT pin is released) after the t_RETRYtime elapses. After the t_RETRY

time elapses, the FAULT, OCP, and corresponding FET's OCP bits stay latched until a clear faults command is

issued either through the CLR_FLT bit or an nSLEEP reset pulse (t_RST).

Peak Current due

to deglitch time

I_OCP

I_OUTx

t_RETRY

t_OCP

nFAULT Released

nFAULT Pulled High

Fault Condition

nFAULT

Time

Figure 8-43. Overcurrent Protection - Automatic Retry Mode

8.3.14.6.3 OCP Report Only (OCP_MODE = 10b)

No protective action occurs after a OCP event in this mode. The overcurrent event is reported by driving the

nFAULT pin low and latching the FAULT, OCP, and corresponding FET's OCP bits high in the SPI registers. The

DRV8316 continues to operate as usual. The external controller manages the overcurrent condition by acting

52

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

appropriately. The reporting clears (nFAULT pin is released) when the OCP condition clears and a clear faults

command is issued either through the CLR_FLT bit or an nSLEEP reset pulse (t_RST).

8.3.14.6.4 OCP Disabled (OCP_MODE = 11b)

No action occurs after a OCP event in this mode.

8.3.14.7 Buck Overcurrent Protection

A buck overcurrent event is sensed by monitoring the current flowing through buck regulator’s FETs. If the

current across the buck regulator FET exceeds the I_{BK_OCP}threshold for longer than the t_{BK_OCP}deglitch time,

an OCP event is recognized. The buck OCP mode is configured in automatic retry setting. In this setting, after a

buck OCP event is detected, all the buck regulator’s FETs are disabled and the nFAULT pin is driven low. The

FAULT, BK_FLT, and BUCK_OCP bits are latched high in the SPI registers. Normal operation starts again

automatically (driver operation and the nFAULT pin is released) after the t_{BK_RETRY}time elapses. The FAULT,

BK_FLT, and BUCK_OCP bits stay latched until the t_RETRYperiod expires.

8.3.14.8 Thermal Warning (OTW)

If the die temperature exceeds the trip point of the thermal warning (T_OTW), the OT bit in the IC status (IC_STAT)

register and OTW bit in the status register is set. The reporting of OTW on the nFAULT pin can be enabled by

setting the over-temperature warning reporting (OTW_REP) bit in the configuration control register. The device

performs no additional action and continues to function. In this case, the nFAULT pin releases when the die

temperature decreases below the hysteresis point of the thermal warning (T_{OTW_HYS}). The OTW bit remains set

until cleared through the CLR_FLT bit or an nSLEEP reset pulse (t_RST) and the die temperature is lower than

thermal warning trip (T_OTW).

Note

Over temperature warning is not reported on nFAULT pin by default.

8.3.14.9 Thermal Shutdown (OTS)

If the die temperature exceeds the trip point of the thermal shutdown limit (T_OTS), all the FETs are disabled, the

charge pump is shut down, and the nFAULT pin is driven low. In addition, the FAULT and OT bit in the IC status

(IC_STAT) register and OTS bit in the status register is set. Normal operation starts again (driver operation and

the nFAULT pin is released) when the overtemperature condition clears. The OTS bit stays latched high

indicating that a thermal event occurred until a clear fault command is issued either through the CLR_FLT bit or

an nSLEEP reset pulse (t_RST). This protection feature cannot be disabled.

Submit Document Feedback

53

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.4 Device Functional Modes

8.4.1 Functional Modes

8.4.1.1 Sleep Mode

The nSLEEP pin manages the state of the DRV8316 family of devices. When the nSLEEP pin is low, the device

goes to a low-power sleep mode. In sleep mode, all FETs are disabled, sense amplifiers are disabled, buck

regulator (if present) is disabled, the charge pump is disabled, the AVDD regulator is disabled, and the SPI bus

is disabled. The t_SLEEPtime must elapse after a falling edge on the nSLEEP pin before the device goes to sleep

mode. The device comes out of sleep mode automatically if the nSLEEP pin is pulled high. The t_WAKEtime must

elapse before the device is ready for inputs.

In sleep mode and when V_VM< V_UVLO, all MOSFETs are disabled.

Note

During power up and power down of the device through the nSLEEP pin, the nFAULT pin is held low

as the internal regulators are enabled or disabled. After the regulators have enabled or disabled, the

nFAULT pin is automatically released. The duration that the nFAULT pin is low does not exceed the

t_SLEEPor t_WAKEtime.

8.4.1.2 Operating Mode

When the nSLEEP pin is high and the V_VMvoltage is greater than the V_UVLOvoltage, the device goes to

operating mode. The t_WAKEtime must elapse before the device is ready for inputs. In this mode the charge

pump, AVDD regulator, buck regulator, and SPI bus are active.

8.4.1.3 Fault Reset (CLR_FLT or nSLEEP Reset Pulse)

In the case of device latched faults, the DRV8316 family of devices goes to a partial shutdown state to help

protect the power MOSFETs and system.

When the fault condition clears, the device can go to the operating state again by either setting the CLR_FLT

SPI bit on SPI devices or issuing a reset pulse to the nSLEEP pin on either interface variant. The nSLEEP reset

pulse (t_RST) consists of a high-to-low-to-high transition on the nSLEEP pin. The low period of the sequence

should fall with the t_RSTtime window or else the device will start the complete shutdown sequence. The reset

pulse has no effect on any of the regulators, device settings, or other functional blocks.

8.4.2 DRVOFF functionality

When DRVOFF pin is high, all six MOSFETs are disabled. If nSLEEP is high when the DRVOFF pin is high, the

charge pump, AVDD regulator, buck regulator, and SPI bus are active and any driver-related faults such as OCP

will be inactive.

54

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.5 SPI Communication

8.5.1 Programming

On DRV8316 SPI devices, an SPI bus is used to set device configurations, operating parameters, and read out

diagnostic information. The SPI operates in slave mode and connects to a master controller. The SPI input data

(SDI) word consists of a 16-bit word, with a 6-bit address and 8 bits of data. The SPI output consists of 16 bit

word, with a 8 bits of status information (STAT register) and 8-bit register data.

A valid frame must meet the following conditions:

•

The SCLK pin should be low when the nSCS pin transitions from high to low and from low to high.

The nSCS pin should be pulled high for at least 400 ns between words.

When the nSCS pin is pulled high, any signals at the SCLK and SDI pins are ignored and the SDO pin is

placed in the Hi-Z state.

•

Data is captured on the falling edge of the SCLK pin and data is propagated on the rising edge of the SCLK

pin.

•

The most significant bit (MSB) is shifted in and out first.

A full 16 SCLK cycles must occur for transaction to be valid.

If the data word sent to the SDI pin is less than or more than 16 bits, a frame error occurs and the data word

is ignored.

•

For a write command, the existing data in the register being written to is shifted out on the SDO pin following

the 8-bit status data.

The SPI registers are reset to the default settings on power up and when the device is enters sleep mode

8.5.1.1 SPI Format

The SDI input data word is 16 bits long and consists of the following format:

•

1 read or write bit, W (bit B15)

6 address bits, A (bits B14 through B9)

Parity bit, P (bit B8)

8 data bits, D (bits B7 through B0)

The SDO output data word is 16 bits long and the first 8 bits are status bits. The data word is the content of the

register being accessed.

For a write command (W0 = 0), the response word on the SDO pin is the data currently in the register being

written to.

For a read command (W0 = 1), the response word is the data currently in the register being read.

nSCS

A1

S1

D1

R1

SDI

SDO

Figure 8-44.

Submit Document Feedback

55

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Master Controller

Device

MCLK

MO

MI

SCLK

SDI

SPI

Communication

SDO

SPI

Communication

nSCS

CS

Figure 8-45.

Table 8-8. SDI Input Data Word Format

R/W

ADDRESS

Parity

DATA

B15

W0

B14

A5

B13

A4

B12

A3

B11

A2

B10

A1

B9

A0

B8

P

B7

D7

B6

D6

B5

D5

B4

D4

B3

D3

B2

D2

B1

D1

B0

D0

Table 8-9. SDO Output Data Word Format

STATUS

B15

S7

B14

S6

B13

S5

B12

S4

B11

S3

B10

S2

B9

S1

B8

S0

B7

D7

B6

D6

B5

D5

B4

D4

B3

D3

B2

D2

B1

D1

B0

D0

nSCS

SCLK

SDI

X

Z

MSB

LSB

X

Z

SDO

Capture

Point

Propagate

Point

Figure 8-46. SPI Slave Timing Diagram

8.6 Register Map

56

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.1 STATUS Registers

Table 8-10 lists the STATUS registers. All register offset addresses not listed in Table 8-10 should be considered

as reserved locations and the register contents should not be modified.

Status Configuration

Table 8-10. STATUS Registers

Address

0x0

Acronym

IC_Status_

Status__1

Status__2

Register Name

IC Status Register

Status Register 1

Status Register 2

Section

Go

0x1

Go

0x2

Go

Complex bit access types are encoded to fit into small table cells. Table 8-11 shows the codes that are used for

access types in this section.

Table 8-11. STATUS Access Type Codes

Access Type

Code

Description

Read Type

R

Read

R-0

R

Read

-0

Returns 0s

Reset or Default Value

- n

Value after reset or the default value

Submit Document Feedback

57

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.1.1 IC_Status_ Register (Address = 0x0) [Reset = 0x0]

IC_Status_ is shown in Table 8-12.

Return to the Summary Table.

Table 8-12. IC_Status_ Register Field Descriptions

Bit

Field

Type

Reset

Description

6

BK_FLT

R

0x0

Buck Fault Bit

0x0 = No buck regulator fault condition is detected

0x1 = Buck regulator fault condition is detected

5

4

3

2

1

0

SPI_FLT

OCP

R

0x0

SPI Fault Bit

0x0 = No SPI fault condition is detected

0x1 = SPI Fault condition is detected

Over Current Protection Status Bit

0x0 = No overcurrent condition is detected

0x1 = Overcurrent condition is detected

NPOR

OVP

Supply Power On Reset Bit

0x0 = Power on reset condition is detected on VM

0x1 = No power-on-reset condition is detected on VM

Supply Overvoltage Protection Status Bit

0x0 = No overvoltage condition is detected on VM

0x1 = Overvoltage condition is detected on VM

OT

Overtemperature Fault Status Bit

0x0 = No overtemperature warning / shutdown is detected

0x1 = Overtemperature warning / shutdown is detected

FAULT

Device Fault Bit

0x0 = No fault condition is detected

0x1 = Fault condition is detected

58

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.1.2 Status__1 Register (Address = 0x1) [Reset = 0x0]

Status__1 is shown in Table 8-13.

Return to the Summary Table.

Table 8-13. Status__1 Register Field Descriptions

Bit

Field

Type

Reset

Description

7

OTW

R

0x0

Overtemperature Warning Status Bit

0x0 = No overtemperature warning is detected

0x1 = Overtemperature warning is detected

6

5

4

3

2

1

0

OTS

R

0x0

Overtemperature Shutdown Status Bit

0x0 = No overtemperature shutdown is detected

0x1 = Overtemperature shutdown is detected

OCP_HC

OCL_LC

OCP_HB

OCP_LB

OCP_HA

OCP_LA

Overcurrent Status on High-side switch of OUTC

0x0 = No overcurrent detected on high-side switch of OUTC

0x1 = Overcurrent detected on high-side switch of OUTC

Overcurrent Status on Low-side switch of OUTC

0x0 = No overcurrent detected on low-side switch of OUTC

0x1 = Overcurrent detected on low-side switch of OUTC

Overcurrent Status on High-side switch of OUTB

0x0 = No overcurrent detected on high-side switch of OUTB

0x1 = Overcurrent detected on high-side switch of OUTB

Overcurrent Status on Low-side switch of OUTB

0x0 = No overcurrent detected on low-side switch of OUTB

0x1 = Overcurrent detected on low-side switch of OUTB

Overcurrent Status on High-side switch of OUTA

0x0 = No overcurrent detected on high-side switch of OUTA

0x1 = Overcurrent detected on high-side switch of OUTA

Overcurrent Status on Low-side switch of OUTA

0x0 = No overcurrent detected on low-side switch of OUTA

0x1 = Overcurrent detected on low-side switch of OUTA

Submit Document Feedback

59

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.1.3 Status__2 Register (Address = 0x2) [Reset = 0x0]

Status__2 is shown in Table 8-14.

Return to the Summary Table.

Table 8-14. Status__2 Register Field Descriptions

Bit

7

Field

Type

Reset

Description

RESERVED

OTP_ERR

R

0x0

Reserved

6

R

0x0

One Time Programmabilty Error

0x0 = No OTP error is detected

0x1 = OTP Error is detected

5

4

3

2

1

0

BUCK_OCP

BUCK_UV

R

0x0

Buck Regulator Overcurrent Staus Bit

0x0 = No buck regulator overcurrent is detected

0x1 = Buck regulator overcurrent is detected

R

Buck Regulator Undervoltage Staus Bit

0x0 = No buck regulator undervoltage is detected

0x1 = Buck regulator undervoltage is detected

VCP_UV

R

Charge Pump Undervoltage Status Bit

0x0 = No charge pump undervoltage is detected

0x1 = Charge pump undervoltage is detected

SPI_PARITY

SPI_SCLK_FLT

SPI_ADDR_FLT

R-0

R

SPI Parity Error Bit

0x0 = No SPI parity error is detected

0x1 = SPI parity error is detected

SPI Clock Framing Error Bit

0x0 = No SPI clock framing error is detected

0x1 = SPI clock framing error is detected

R

SPI Address Error Bit

0x0 = No SPI address fault is detected (due to accessing non-user

register)

0x1 = SPI address fault is detected

60

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2 CONTROL Registers

Table 8-15 lists the CONTROL registers. All register offset addresses not listed in Table 8-15 should be

considered as reserved locations and the register contents should not be modified.

Control Configuration

Table 8-15. CONTROL Registers

Address

0x3

Acronym

Register Name

Section

Go

Control__1

Control__2

Control__3

Control__4

Control__5

Control__6

Control__10

Control Register 1

Control Register 2

Control Register 3

Control Register 4

Control Register 5

Control Register 6

Control Register 10

0x4

Go

0x5

Go

0x6

Go

0x7

Go

0x8

Go

0xC

Go

Complex bit access types are encoded to fit into small table cells. Table 8-16 shows the codes that are used for

access types in this section.

Table 8-16. CONTROL Access Type Codes

Access Type

Read Type

R

Code

R

Description

Read

Write Type

W

Write

W1C

W

Write

1C

1 to clear

WAPU

W

Write

APU

Atomic write with password unlock

Reset or Default Value

- n

Value after reset or the default value

Submit Document Feedback

61

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.1 Control__1 Register (Address = 0x3) [Reset = 0x11]

Control__1 is shown in Table 8-17.

Return to the Summary Table.

Table 8-17. Control__1 Register Field Descriptions

Bit

7-3

2-0

Field

Type

Reset

Description

RESERVED

REG_LOCK

R

0x2

Reserved

R/WAPU

0x1

Register Lock Bits

0x0 = No effect unless locked or unlocked

0x1 = No effect unless locked or unlocked

0x2 = No effect unless locked or unlocked

0x3 = Write 011b to this register to unlock all registers

0x4 = No effect unless locked or unlocked

0x5 = No effect unless locked or unlocked

0x6 = Write 110b to lock the settings by ignoring further register

writes except to these bits and address 0x03h bits 2-0.

0x7 = No effect unless locked or unlocked

62

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.2 Control__2 Register (Address = 0x4) [Reset = 0x18]

Control__2 is shown in Table 8-18.

Return to the Summary Table.

Table 8-18. Control__2 Register Field Descriptions

Bit

7-6

5

Field

Type

Reset

Description

RESERVED

SDO_MODE

R

0x0

Reserved

R/W

0x0

SDO Mode Setting

0x0 = SDO IO in Open Drain Mode

0x1 = SDO IO in Push Pull Mode

4-3

2-1

0

SLEW

R/W

W1C

0x3

0x0

Slew Rate Settings

0x0 = Slew rate is 25 V/µs

0x1 = Slew rate is 50 V/µs

0x2 = Slew rate is 150 V/µs

0x3 = Slew rate is 200 V/µs

PWM_MODE

CLR_FLT

Device Mode Selection

0x0 = 6x mode

0x1 = 6x mode with current limit

0x2 = 3x mode

0x3 = 3x mode with current limit

Clear Fault

0x0 = No clear fault command is issued

0x1 = To clear the latched fault bits. This bit automatically resets after

being written.

Submit Document Feedback

63

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.3 Control__3 Register (Address = 0x5) [Reset = 0x0]

Control__3 is shown in Table 8-19.

Return to the Summary Table.

Table 8-19. Control__3 Register Field Descriptions

Bit

7

Field

Type

Reset

Description

Reserved

RESERVED

PWM_100_DUTY_SEL

R

0x0

6

R

0x0

5

R

0x0

4

R/W

0x0

Freqency of PWM at 100% Duty Cycle

0x0 = 20KHz

0x1 = 40KHz

3

2

1

0

OVP_SEL

OVP_EN

R/W

0x0

Overvoltage Level Setting

0x0 = VM overvoltage level is 32-V

0x1 = VM overvoltage level is 20-V

Overvoltage Enable Bit

0x0 = Overvoltage protection is disabled

0x1 = Overvoltage protection is enabled

SPI_FLT_REP

OTW_REP

SPI Fault Reporting Disable Bit

0x0 = SPI fault reporting on nFAULT pin is enabled

0x1 = SPI fault reporting on nFAULT pin is disabled

Overtemperature Warning Reporting Bit

0x0 = Over temperature reporting on nFAULT is disabled

0x1 = Over temperature reporting on nFAULT is enabled

64

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.4 Control__4 Register (Address = 0x6) [Reset = 0x1]

Control__4 is shown in Table 8-20.

Return to the Summary Table.

Table 8-20. Control__4 Register Field Descriptions

Bit

Field

Type

Reset

Description

7

DRV_OFF

R/W

0x0

Driver OFF Bit

0x0 = No Action

0x1 = Enter Low Power Standby Mode

6

OCP_CBC

OCP_DEG

R/W

0x0

OCP PWM Cycle Operation Bit

0x0 = OCP clearing in PWM input cycle change is disabled

0x1 = OCP clearing in PWM input cycle change is enabled

5-4

OCP Deglitch Time Settings

0x0 = OCP deglitch time is 0.2 µs

0x1 = OCP deglitch time is 0.6 µs

0x2 = OCP deglitch time is 1.1 µs

0x3 = OCP deglitch time is 1.6 µs

3

2

OCP_RETRY

OCP_LVL

R/W

0x0

0x1

OCP Retry Time Settings

0x0 = OCP retry time is 5 ms

0x1 = OCP retry time is 500 ms

Overcurrent Level Setting

0x0 = OCP level is 16 A

0x1 = OCP level is 24 A

1-0

OCP_MODE

OCP Fault Options

0x0 = Overcurrent causes a latched fault

0x1 = Overcurrent causes an automatic retrying fault

0x2 = Overcurrent is report only but no action is taken

0x3 = Overcurrent is not reported and no action is taken

Submit Document Feedback

65

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.5 Control__5 Register (Address = 0x7) [Reset = 0x0]

Control__5 is shown in Table 8-21.

Return to the Summary Table.

Table 8-21. Control__5 Register Field Descriptions

Bit

7

Field

Type

Reset

Description

RESERVED

ILIM_RECIR

R

0x0

Reserved

6

R/W

0x0

Current Limit Recirculation Settings

0x0 = Current recirculation through FETs (Brake Mode)

0x1 = Current recirculation through diodes (Coast Mode)

5

4

3

RESERVED

EN_AAR

R

0x0

Reserved

R

R/W

Active Asynshronous Rectification Enable Bit

0x0 = AAR mode is disabled

0x1 = AAR mode is enabled

2

EN_ASR

R/W

0x0

Active Synchronous Rectification Enable Bit

0x0 = ASR mode is disabled

0x1 = ASR mode is enabled

1-0

CSA_GAIN

Current Sense Amplifier's Gain Settings

0x0 = CSA gain is 0.15 V/A

0x1 = CSA gain is 0.1875 V/A

0x2 = CSA gain is 0.25 V/A

0x3 = CSA gain is 0.375 V/A

66

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.6 Control__6 Register (Address = 0x8) [Reset = 0x0]

Control__6 is shown in Table 8-22.

Return to the Summary Table.

Table 8-22. Control__6 Register Field Descriptions

Bit

7-6

5

Field

Type

Reset

Description

Reserved

RESERVED

BUCK_PS_DIS

R

0x0

R

0x0

4

R/W

0x0

Buck Power Sequencing Disable Bit

0x0 = Buck power sequencing is enabled

0x1 = Buck power sequencing is disabled

3

BUCK_CL

R/W

0x0

Buck Current Limit Setting

0x0 = Buck regulator current limit is set to 600 mA

0x1 = Buck regulator current limit is set to 150 mA

2-1

BUCK_SEL

Buck Voltage Selection

0x0 = Buck voltage is 3.3 V

0x1 = Buck voltage is 5.0 V

0x2 = Buck voltage is 4.0 V

0x3 = Buck voltage is 5.7 V

0

BUCK_DIS

R/W

0x0

Buck Disable Bit

0x0 = Buck regulator is enabled

0x1 = Buck regulator is disabled

Submit Document Feedback

67

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

8.6.2.7 Control__10 Register (Address = 0xC) [Reset = 0x0]

Control__10 is shown in Table 8-23.

Return to the Summary Table.

Table 8-23. Control__10 Register Field Descriptions

Bit

7-5

4

Field

Type

Reset

Description

RESERVED

DLYCMP_EN

R

0x0

Reserved

R/W

0x0

Driver Delay Compensation enable

0x0 = Disable

0x1 = Enable

3-0

DLY_TARGET

R/W

0x0

Delay Target for Driver Delay Compensation

0x0 = 0 us

0x1 = 0.4 us

0x2 = 0.6 us

0x3 = 0.8 us

0x4 = 1 us

0x5 = 1.2 us

0x6 = 1.4 us

0x7 = 1.6 us

0x8 = 1.8 us

0x9 = 2 us

0xA = 2.2 us

0xB = 2.4 us

0xC = 2.6 us

0xD = 2.8 us

0xE = 3 us

0xF = 3.2 us

68

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification, and TI

does not warrant its accuracy or completeness. TI’s customers are responsible for determining

suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

The DRV8316 can be used to drive Brushless-DC motors. The following design procedure can be used to

configure the DRV8316.

V_VM

+

10 nF

CPL

1 µF

VM

0.1 µF

10 µF

0.1 µF

CPH

CP

V_CC

Voltage

Supervisor

VREF

AVDD

Microcontroller

C_AVDD

AGND

ADC

SOC

SOB

SOA

Replace Inductor (L_BK) with Resistor

(R_BK) for larger external load or to

reduce power dissipation

Current

Sensing

CSA

ADC

L_BK

External

Load

SW_BK

R_BK

R_PU1

C_BK

DRV8316R

GND_BK

nFAULT

GP-I

FB_BK

nSLEEP

DRVOFF

GP-O

Driver

Control

GP-O

INHA

INLA

INHB

INLB

INHC

INLC

GP-O

PWM

Control

Module

PWM

Control

Input

Hall

Sensors

(Optional)

OUTA

OUTB

GP-O

A

B

SDO

GP-I

GP-O

nSCS

SCLK

SPI

OUTC

PGND

SDI

Hall Input

GP-I

Figure 9-1. Primary Application Schematics

Submit Document Feedback

69

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

9.2 Typical Applications

9.2.1 Three-Phase Brushless-DC Motor Control

In this application, the DRV8316 is used to drive a Brushless-DC motor

9.2.1.1 Detailed Design Procedure

Table 9-1lists the example input parameters for the system design.

Table 9-1. Design Parameters

DESIGN PARAMETERS

Supply voltage

REFERENCE

EXAMPLE VALUE

V_VM

I_RMS

I_PEAK

f_PWM

SR

24 V

3 A

Motor RMS current

Motor peak current

8 A

PWM Frequency

50 kHz

200 V/µs

3.3 V

Slew Rate Setting

Buck regulator output voltage

ADC reference voltage

System ambient temperature

V_BK

V_VREF

T_A

3.0 V

–20°C to +105°C

9.2.1.1.1 Motor Voltage

Brushless-DC motors are typically rated for a certain voltage (for example 12 V and 24 V). Operating a motor at

a higher voltage corresponds to a lower drive current to obtain the same motor power. A higher operating

voltage also corresponds to a higher obtainable rpm. DRV8316 device allows for the use of higher operating

voltage because of a maximum VM rating of 40 V.

Operating at lower voltages generally allows for more accurate control of phase currents. The DRV8316

functions down to a supply of 4.5V.

9.2.1.2 Application Curves

TBD

Graph Placeholder

C00

Figure 9-2. App Curve-1

Figure 9-3. App Curve-2

70

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

9.2.2 Three-Phase Brushless-DC Motor Control With Current Limit

In this application, the DRV8316 is used to drive a brushless-DC motor with current limit.

9.2.2.1 Detailed Design Procedure

Table 9-1lists the example input parameters for the system design.

Table 9-2. Design Parameters

DESIGN PARAMETERS

Supply voltage

REFERENCE

V_VM

EXAMPLE VALUE

24 V

5 A

Motor RMS current

Motor peak current

Motor resistance

I_RMS

I_PEAK

8 A

R_MOTOR

L_MOTOR

f_PWM

Motor inductance

PWM Frequency

50 kHz

Slew Rate Setting

SR

200 V/µs

Rise and Fall Time

t_RISE, t_FALL

V_BK

V_VREF

T_A

Buck regulator output voltage

ADC reference voltage

System ambient temperature

3.3 V

3.0 V

–20°C to +105°C

9.2.2.1.1 Motor Voltage

Brushless-DC motors are typically rated for a certain voltage (for example 12 V and 24 V). Operating a motor at

a higher voltage corresponds to a lower drive current to obtain the same motor power. A higher operating

voltage also corresponds to a higher obtainable rpm. DRV8316 device allows for the use of higher operating

voltage because of a maximum VM rating of 40 V.

Operating at lower voltages generally allows for more accurate control of phase currents. The DRV8316

functions down to a supply of 4.5V.

9.2.2.2 Application Curves

TBD

Graph Placeholder

C00

Figure 9-4. Device Powerup with VM

Figure 9-5. Device Powerup with nSLEEP

Submit Document Feedback

71

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

Graph Placeholder

C00

Figure 9-6. Power Management

Figure 9-7. Driver PWM Operation with Current

Feedback

72

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

9.2.3 Brushed-DC and Solenoid Load

9.2.3.1 Design Requirements

Table 9-3 gives design input parameters for system design.

Table 9-3. Design Parameters

DESIGN PARAMETER

REFERENCE

EXAMPLE VALUE

Brushed motor rms current

I_{RMS, BDC}

1.0 A

2.0 A

0.5 A

1.0 A

Brushed motor peak current

Solenoid rms current

I_{PEAK, BDC}

I_{RMS, SOL}

Solenoid peak current

I_{PEAK, SOL}

9.2.3.1.1 Detailed Design Procedure

Table 9-4. Brushed-DC Control

Function

IN1

EN1

IN2

EN2

OUT1

OUT2

Forward

Reverse

1

0

1

0

1

H

L

H

L

Brake (low-side slow

decay)

0

1

0

1

L

High-side slow decay

Coast

1

0

1

0

H

Z

H

Z

X

Table 9-5. Solenoid Control (High-Side Load)

Function

IN3

EN3

OUT3

Coast / Off

On

X

0

1

0

1

Z

L

Brake

H

Submit Document Feedback

73

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

9.2.4 Three Solenoid Loads

9.2.4.1 Design Requirements

Table 9-6 gives design input parameters for system design.

Table 9-6. Design Parameters

DESIGN PARAMETER

REFERENCE

EXAMPLE VALUE

Solenoid rms current

I_{RMS, SOL}

1.0 A

1.5 A

Solenoid peak current

I_{PEAK, SOL}

9.2.4.1.1 Detailed Design Procedure

Table 9-7. Solenoid Control (high-side load)

Function

IN2

EN2

OUT2

Coast / Off

On

X

0

1

0

1

Z

L

Brake

H

Table 9-8. Solenoid Control (low-side load)

Function

IN1

EN1

OUT1

Coast / Off

On

X

1

0

1

Z

H

L

Brake

74

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

10 Power Supply Recommendations

10.1 Bulk Capacitance

Having an appropriate local bulk capacitance is an important factor in motor drive system design. It is generally

beneficial to have more bulk capacitance, while the disadvantages are increased cost and physical size.

The amount of local capacitance needed depends on a variety of factors, including:

•

The highest current required by the motor system

The capacitance and current capability of the power supply

The amount of parasitic inductance between the power supply and motor system

The acceptable voltage ripple

The type of motor used (brushed dc, brushless DC, stepper)

The motor braking method

The inductance between the power supply and the motor drive system limits the rate current can change from

the power supply. If the local bulk capacitance is too small, the system responds to excessive current demands

or dumps from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage

remains stable and high current can be quickly supplied.

The data sheet generally provides a recommended value, but system-level testing is required to determine the

appropriate sized bulk capacitor.

Parasitic Wire

Inductance

Motor Drive System

Power Supply

VM

+

Motor Driver

œ

GND

Local

Bulk Capacitor

IC Bypass

Capacitor

Figure 10-1. Example Setup of Motor Drive System With External Power Supply

The voltage rating for bulk capacitors should be higher than the operating voltage, to provide margin for cases

when the motor transfers energy to the supply.

Submit Document Feedback

75

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

11 Layout

11.1 Layout Guidelines

The bulk capacitor should be placed to minimize the distance of the high-current path through the motor driver

device. The connecting metal trace widths should be as wide as possible, and numerous vias should be used

when connecting PCB layers. These practices minimize inductance and allow the bulk capacitor to deliver high

current.

Small-value capacitors such as the charge pump, AVDD, and VREF capacitors should be ceramic and placed

closely to device pins.

The high-current device outputs should use wide metal traces.

To reduce noise coupling and EMI interference from large transient currents into small-current signal paths,

grounding should be partitioned between PGND and AGND. TI recommends connecting all non-power stage

circuitry (including the thermal pad) to AGND to reduce parasitic effects and improve power dissipation from the

device. Optionally, GND_BK can be split. Ensure grounds are connected through net-ties or wide resistors to

reduce voltage offsets and maintain gate driver performance.

The device thermal pad should be soldered to the PCB top-layer ground plane. Multiple vias should be used to

connect to a large bottom-layer ground plane. The use of large metal planes and multiple vias helps dissipate

the I²× R_DS(on)heat that is generated in the device.

To improve thermal performance, maximize the ground area that is connected to the thermal pad ground across

all possible layers of the PCB. Using thick copper pours can lower the junction-to-air thermal resistance and

improve theremal dissipation from the die surface.

Separate the SW_BUCK and FB_BUCK traces with ground separation to reduce buck switching from coupling

as noise into the buck outer feedback loop. Widen the FB_BUCK trace as much as possible to allow for faster

load switching.

Recommended Layout Example for VQFN Package shows a layout example for the DRV8316.

76

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

11.2 Layout Example

Recommended Layout Example for VQFN Package

Submit Document Feedback

77

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

11.3 Thermal Considerations

The DRV8316 has thermal shutdown (TSD) as previously described. A die temperature in excess of 150°C

(minimally) disables the device until the temperature drops to a safe level.

Any tendency of the device to enter thermal shutdown is an indication of excessive power dissipation, insufficient

heatsinking, or too high an ambient temperature.

11.3.1 Power Dissipation

The power dissipated in the output FET resistance, or R_DS(on)dominates power dissipation in the DRV8316. A

rough estimate of average power dissipation of each half-H-bridge when running a static load is:

At start-up and fault conditions, this current is much higher than normal running current; remember to take these

peak currents and their duration into consideration.

The total device dissipation is the power dissipated in each of the three half-H-bridges added together.

The maximum amount of power that the device can dissipate depends on ambient temperature and heatsinking.

Note that R_DS(on)increases with temperature, so as the device heats, the power dissipation increases. Take this

into consideration when sizing the heatsink.

78

Submit Document Feedback

DRV8316

SLVSF16 – JANUARY 2021

www.ti.com

12 Device and Documentation Support

12.1 Support Resources

TI E2E^™support forums are an engineer's go-to source for fast, verified answers and design help — straight

from the experts. Search existing answers or ask your own question to get the quick design help you need.

Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do

not necessarily reflect TI's views; see TI's Terms of Use.

12.2 Trademarks

TI E2E^™is a trademark of Texas Instruments.

All trademarks are the property of their respective owners.

12.3 Electrostatic Discharge Caution

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled

with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may

be more susceptible to damage because very small parametric changes could cause the device not to meet its published

specifications.

12.4 Glossary

TI Glossary

This glossary lists and explains terms, acronyms, and definitions.

13 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most-

current data available for the designated device. This data is subject to change without notice and without

revision of this document. For browser-based versions of this data sheet, see the left-hand navigation pane.

Submit Document Feedback

79

IMPORTANT NOTICE AND DISCLAIMER

TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE

DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”

AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY

IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD

PARTY INTELLECTUAL PROPERTY RIGHTS.

These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate

TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable

standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you

permission to use these resources only for development of an application that uses the TI products described in the resource. Other

reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third party

intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages,

costs, losses, and liabilities arising out of your use of these resources.

TI’s products are provided subject to TI’s Terms of Sale (https:www.ti.com/legal/termsofsale.html) or other applicable terms available either

on ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s

applicable warranties or warranty disclaimers for TI products.IMPORTANT NOTICE

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265


型号：	DRV8316
厂家：	TEXAS INSTRUMENTS
描述：	DRV8316 Three-Phase Integrated FET Motor Driver
文件：	总83页 (文件大小：2077K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DRV8316 [TI]

相关型号：

DRV8316-Q1

DRV8316C

DRV8316C-Q1

DRV8316CRQRGFRQ1

DRV8316CRRGFR

DRV8316CTQRGFRQ1

DRV8316CTRGFR

DRV8316R

DRV8316R-Q1

DRV8316RQRGFRQ1

DRV8316RRGFR

DRV8316T