DRV10964 [TI]

具有自动调优功能的 5V 标称电压、1.8A 峰值无传感器正弦控制三相 BLDC 电机驱动器;


型号：	DRV10964
厂家：	TEXAS INSTRUMENTS
描述：	具有自动调优功能的 5V 标称电压、1.8A 峰值无传感器正弦控制三相 BLDC 电机驱动器电机驱动传感器驱动器
文件：	总27页 (文件大小：2402K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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DRV10964

ZHCSEQ8 –MARCH 2016

DRV10964 5V、三相正弦无传感器 BLDC 电机驱动器

1 特性

3 说明

•

专有的无传感器无窗口

180° 正弦控制方案

DRV10964 是一款带有集成功率金属氧化物半导体场

效应晶体管 (MOSFET) 的三相无传感器电机驱动器。

该器件专门针对高效、低噪声和低外部组件数的电机驱

动应用而设计。专有的无传感器无窗口 180° 正弦控制

方案可提供超静音的电机驱动性能。DRV10964 具备

智能锁定检测功能，与其他内部保护电路搭配使用以确

保器件安全运行。DRV10964 采用带有外露散热焊盘

的高效散热型 10 引脚超小外形尺寸无引线 (USON) 封

装。

•

输入电压范围：2.1V 至 5.5V

500mA 输出电流

休眠模式下的静态电流低至 15µA（典型值）

驱动器高侧和低侧 (H+L) 总导通电阻 (Rdson) 小于

1.5Ω

•

电流限制和短路电流保护

锁定检测

电压浪涌保护 (AVS)

欠压闭锁 (UVLO)

热关断

器件信息 ⁽¹⁾

部件号

DRV10964

封装

USON (10)

封装尺寸（标称值）

3.00mm x 3.00mm

2 应用范围

(1) 要了解所有可用封装，请见数据表末尾的可订购产品附录。

•

笔记本 CPU 风扇

游戏站 CPU 风扇

ASIC 冷却风扇

简化电路原理图

VCC

100k

VCC

PWM 10

PWMIN

FGS

VCC

CONFIG

FG Status

VCC

Direction

2.2 µF

GND

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. PRODUCTION DATA.

English Data Sheet: SLDS227

DRV10964

ZHCSEQ8 –MARCH 2016

www.ti.com.cn

7.3 Feature Description................................................... 7

7.4 Device Functional Modes........................................ 14

Application and Implementation ........................ 17

8.1 Application Information............................................ 17

8.2 Typical Application .................................................. 17

Power Supply Recommendations...................... 19

特性.......................................................................... 1

应用范围................................................................... 1

说明.......................................................................... 1

修订历史记录 ........................................................... 2

Pin Configuration and Functions......................... 3

Specifications......................................................... 4

6.1 Absolute Maximum Ratings ...................................... 4

6.2 ESD Ratings.............................................................. 4

6.3 Recommended Operating Conditions....................... 4

6.4 Thermal Information.................................................. 4

6.5 Electrical Characteristics........................................... 5

6.6 Typical Characteristics.............................................. 6

Detailed Description .............................................. 7

7.1 Overview ................................................................... 7

7.2 Functional Block Diagram ......................................... 7

10 Layout................................................................... 19

10.1 Layout Guidelines ................................................. 19

10.2 Layout Example .................................................... 19

11 器件和文档支持 ..................................................... 20

11.1 社区资源................................................................ 20

11.2 商标....................................................................... 20

11.3 静电放电警告......................................................... 20

11.4 Glossary................................................................ 20

12 机械、封装和可订购信息....................................... 20

4 修订历史记录

日期

修订版本

注释

2016 年 2016

最初发布。

DRV10964

www.ti.com.cn

ZHCSEQ8 –MARCH 2016

5 Pin Configuration and Functions

DSN Package

10-Pin USON

Top View

PWM

CONFIG

FGS

VCC

GND

Pin Functions

NAME

I/O

DESCRIPTION

NO.

Output Motor speed indicator output (open drain).

Motor speed indicator selector. The state of this pin is latched on power up and can not be changed

dynamically.

FGS

Input

VCC

Power

Input voltage for motor and chip supply.

Motor Phase W

GND

Ground Ground

Motor Phase V

Motor Phase U

Input

Motor direction selector. This pin can be dynamically changed after power up.

Resistor setting for configuring the handoff threshold. The state of this pin is latched on power up and can

not be changed dynamically.

CONFIG

Input

10 PWM

Thermal Pad

Input

—

Motor speed control input.

—

Connect to Ground for maximum thermal efficiency. Thermal pad is on the bottom of the package.

DRV10964

ZHCSEQ8 –MARCH 2016

www.ti.com.cn

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1) (2)

MIN

–0.3

–1

MAX

UNIT

VCC pin supply voltage

Motor phase pins (U, V, W)

7.7

Direction, speed indicator input, and speed input (FR, FGS, PWM, CONFIG)

Speed output (FG)

–0.3

–40

7.7

150

260

150

T_J

Junction temperature

°C

T_SDR

T_stg

Maximum lead soldering temperature, 10 seconds

Storage temperature

–55

(1) Stresses beyond those listed under Absolute Maximum Ratings 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 Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltages are with respect to ground.

6.2 ESD Ratings

VALUE

±2500

±1000

UNIT

(1)

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

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

V_(ESD)

Electrostatic discharge

(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.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

MAX UNIT

VCC

VCC pin supply voltage

Motor phase pins

2.1

–0.7

–0.1

–40

5.5

U, V, W

FR, FGS, PWM, CONFIG

Direction, speed indicator input, and speed input

Speed output

5.5

7.5

125

T_J

Junction temperature

°C

6.4 Thermal Information

DRV10964

DSN (USON)

10 PINS

40.9

(1)

THERMAL METRIC

UNIT

R_{θ JA}

Junction-to-ambient thermal resistance

Junction-to-case (top) thermal resistance

Junction-to-board thermal resistance

Junction-to-top characterization parameter

°C/W

R_{θ JC(top)}

R_{θ JB}

46.6

15.8

ψ_JT

0.5

ψ_JB

Junction-to-board characterization parameter

Junction-to-case (bottom) thermal resistance

R_{θ JC(bot)}

2.9

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

report, SPRA953.

DRV10964

www.ti.com.cn

ZHCSEQ8 –MARCH 2016

6.5 Electrical Characteristics

(VCC = 5 V, T_A= 25°C unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

I_VCC

Operating current

Sleep current

PWM = V_CC, no motor connected

PWM = 0 V

6.5

µA

I_{VCC_SLEEP}

UVLO

2.1

V_{UVLO_H}

V_{UVLO_L}

V_{UVLO_HYS}

Undervoltage threshold high

Undervoltage threshold low

Undervoltage threshold hysteresis

1.8

1.7

100

200

300

1.5

INTEGRATED MOSFET

R_DSON

PWM

Series resistance (H+L)

V_CC= 5 V; I_OUT= 0.5 A

Ω

V_{IH_PWM}

V_{IL_PWM}

F_PWM

Input high threshold

Input low threshold

PWM input frequency

0.45 × VCC

0.15 × VCC

100

Duty cycle >0% and <100%

Active mode

kHz

kΩ

MΩ

R_{PU_PWM_VCC}

t_SLEEP

PWM pin pullup resistor

Sleep entry time

Standby mode

1.5

PWM = 0 V and the motor speed

less than 10 Hz

I_{OL_FG}

FG sink current

V_FG= 0.3 V

V_FG= 5 V

I_{SC_FG}

FG short circuit current

FGS and FR

V_{IH_FGS}

V_{IL_FGS}

V_{IH_FR}

V_{IL_FR}

Input high threshold

Input low threshold

Input high threshold

Input low threshold

0.45 × VCC

0.15 × VCC

Active Mode

1.5

kΩ

MΩ

kΩ

R_{PU_FGS_VCC}

FGS pin pullup resistor

Standby Mode

R_{PU_FR_VCC}

FR pin pullup resistor

425

BEMF COMPARATOR

V_offset

Input offset

-10

μs

V_HYS

Input hysteresis

T_{delay_r}

Output delay rising

Output delay falling

Common mode voltage

25-mV step

1.5

T_{delay_f}

1.5

V_com

0.3

VCC – 0.7

RATE LIMITING

Ramp time for align (from 0 to

50% duty cycle)

t_ARamp

300

DRV10964

ZHCSEQ8 –MARCH 2016

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Electrical Characteristics (continued)

(VCC = 5 V, T_A= 25°C unless otherwise noted)

PARAMETER

CONFIG

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Handoff speed threshold 87.5 Hz

Handoff speed threshold 12.5 Hz

Handoff speed threshold 25 Hz

Handoff speed threshold 37.5 Hz

Handoff speed threshold 50 Hz

Handoff speed threshold 62.5 Hz

Handoff speed threshold 75 Hz

Handoff speed threshold 87.5 Hz

Handoff speed threshold 100 Hz

Handoff speed threshold 112.5 Hz

Handoff speed threshold 125 Hz

Handoff speed threshold 137.5 Hz

Handoff speed threshold 150 Hz

Handoff speed threshold 162.5 Hz

Handoff speed threshold 175 Hz

Handoff speed threshold 187.5 Hz

7.3

3.1

9.4

5.4 % VCC

11.7 % VCC

17.9 % VCC

24.1 % VCC

30.4 % VCC

36.6 % VCC

42.9 % VCC

48.9 % VCC

55.1 % VCC

61.3 % VCC

67.6 % VCC

73.8 % VCC

80.1 % VCC

86.3 % VCC

92.6 % VCC

100 % VCC

MΩ

13.5

19.8

26.0

32.2

38.5

44.7

50.7

57.0

63.2

69.5

75.6

81.9

88.2

94.5

15.6

21.8

28.1

34.4

40.6

46.8

53.1

59.3

65.6

71.9

78.1

84.4

90.6

96.9

CONFIG_trip

CONFIG pin trip points

r_i

CONFIG pin input impedance

LOCK PROTECTION

t_{ON_LOCK}Lock detect time

t_{OFF_LOCK}Lock release time

SHORT CIRCUIT CURRENT PROTECTION

I_SHTShort circuit current protection

THERMAL SHUTDOWN

Abnormal Kt lock

0.3

0.33

5.9

1.8

T_SD

Thermal shutdown temperature

Thermal shutdown hysteresis

160

°C

T_{SD_HYS}

6.6 Typical Characteristics

1.8

1.6

1.4

1.2

1.0

0.8

0.6

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Power Supply at 25°C

C001

图 1. R_DS(ON)vs Power Supply at 25°C

DRV10964

www.ti.com.cn

ZHCSEQ8 –MARCH 2016

7 Detailed Description

7.1 Overview

The DRV10964 device is a three phase sensorless motor driver with integrated power MOSFETs. It is

specifically designed for high efficiency, low noise and low external component count motor drive applications.

The proprietary sensorless windowless 180° sinusoidal control scheme provides ultra-quiet motor operation by

keeping electrically induced torque ripple small.

Upon start-up, the DRV10964 device will spin the motor in the direction indicated by the FR input pin. The

DRV10964 device will operate a three phase BLDC motor using a sinusoidal control scheme. The magnitude of

the applied sinusoidal phase voltages is determined by the duty cycle of the PWM pin. As the motor spins, the

DRV10964 device provides the speed information at the FG pin.

The DRV10964 device contains an intelligent lock detect function. In the case where the motor is stalled by an

external force, the system will detect the lock condition and will take steps to protect itself as well as the motor.

The operation of the lock detect circuit is described in detail in Lock Detection .

The DRV10964 device also contains several internal protection circuits such as overcurrent protection,

overvoltage protection, undervoltage protection, and overtemperature protection.

7.2 Functional Block Diagram

CONFIG

Decode

ADC

V/I Sensor

GND

DRV10964

VCC

PWM and

WakeUp

PWM

FGS

Logic

Core

Lock

Over Current

Thermal

UVLO

GND

DRV10964

7.3 Feature Description

7.3.1 Sleep Mode

When the PWM commanded duty cycle input is lower than 0.38%, but not 0%, the phase outputs will be put into

a high impedance state. The device will stop driving the motor. The device logic is still active during standby

mode and the DRV10964 device will consume current as specified by I_VCC

DRV10964

ZHCSEQ8 –MARCH 2016

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Feature Description (接下页)

When the PWM commanded duty cycle input is driven to 0% (less than VIL_PWM for at least t_SLEEPtime), the

DRV10964 device will enter a low power sleep mode. In sleep mode, most of the circuitry in the device will be

disabled to minimize the system current. The current consumption in this state is specified by I_{VCC_SLEEP}

The device will remain in sleep mode until either the PWM commanded duty cycle input is driven to a logic high

(higher than V_{IH_PWM}) or the PWM input pin is allowed to float. If the input is allowed to float an internal pullup

resistor will raise the voltage to a logic high level.

Recovering from sleep mode is treated the same as power on condition as illustrated in 图 14.

As part of the device initialization the motor resistance value and the motor Kt value are measured during the

initial motor spin up as shown in 图 14.

7.3.2 Speed Input and Control

The DRV10964 provides three-phase 25-kHz PWM outputs which have an average value of sinusoidal

waveforms from phase to phase. When any phase is measured with reference to ground, the waveform observed

will be a PWM encoded sinusoid coupled with third order harmonics as shown in 图 2. This encoding scheme

simplifies the driver requirements because there will always be one phase output that is equal to zero.

U-V

V-W

W-U

Sinusoidal Voltage from Phase to Phase Sinusoidal Voltage from Phase to GND

With Third Order Harmonics

PWM Output

Average Value

PWM Encoded Phase Output and the Average Value

图 2. Sinusoidal Phase Encoding Used in DRV10964

The output amplitude is determined by the supply voltage (VCC) and the commanded PWM duty cycle (PWM) as

described in 公式 1 and illustrated in 图 3. The maximum amplitude is applied when the commanded PWM duty

cycle is 100%.

Vph_pk= PWMdc × VCC

(1)

VCC

100% output

Vph_pk

VCC*PWMdc

图 3. Output Voltage Amplitude Adjustment

The motor speed is controlled indirectly by using the PWM command to control the amplitude of the phase

voltages which are applied to the motor.

DRV10964

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ZHCSEQ8 –MARCH 2016

Feature Description (接下页)

The duty cycle of PWM input is converted into a 9-bit digital number (from 0 to 511). The control resolution is

1/512 ≈ 0.2%. The duty cycle analyzer implements a first order transfer function between the input duty cycle and

the 9-bit digital number. This is illustrated in 图 4 and 图 5.

9-bit Digital

Number

Amplitude of Output

Sin-wave

PWM In

PWM Output

Duty Cycle Analyzer

AVS

图 4. PWM Command Input Controls the Output Peak Amplitude

VCC/2

255

No AVS or Software

(511 is the Maximum)

50%

Output at Peak

Current Limit Occurs

50%

图 5. Example of PWM Command Input Controlling the Output

The transfer function between the PWM commanded duty cycle and the output peak amplitude is adjustable in

the DRV10964 device. The output peak amplitude is described by 公式 1 when PWM_dc> minimum operation

duty cycle. The minimum operation duty cycle is 10%. When the PWM commanded duty cycle is lower than

minimum operation duty cycle and higher than 0.38%, the output will be controlled at the minimum operation duty

cycle. When the input duty cycle is lower than 0.38%, the DRV10964 device will not drive the output, and enters

the standby mode. This is illustrated in 图 6.

Output Duty

10%

Input Duty

Minimum Duty Cycle = 10%

图 6. Speed Control Transfer Function

7.3.3 Motor Direction Change

The DRV10964 can be easily configured to drive the motor in either direction by setting the input on the FR

(Forward Reverse) pin to a logic 1 or logic 0 state. The direction of commutation as described by the

commutation sequence is illustrated in 表 1.

表 1. Motor Direction Phase Sequencing

FR = 0

FR = 1

Motor direction

U->V->W

U->W->V

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ZHCSEQ8 –MARCH 2016

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7.3.4 Motor Frequency Feedback (FG)

During operation of the DRV10964 device, the FG pin provides an indication of the speed of the motor. The

output provided on this pin is configured by applying a logic signal to the FGS pin.

The formula to determine the speed of the motor is:

IF FGS = 0, RPM = (FREQFG × 60)/number of pole pairs

IF FGS = 1, RPM = (FREQFG × 60 × 3)/number of pole pairs

(2)

(3)

During Open Loop Acceleration the FG pin will provide an indication of the frequency of the signal which is

driving the motor. The lock condition of the motor is not known during Open Loop Acceleration so it is possible

that the FG could be toggling during this time even though the motor is not moving.

The FG pin has built in short circuit protection, which limits the current in the event that the pin is shorted to VCC.

The current will be limited to I_{SC_FG}

7.3.4.1 Tach Feedback During Spin Down

The DRV10964 will provide feedback on the FG pin during spin down of the motor. 图 7 illustrates the behavior

of the FG output. When DRV10964 PWM input is at 0% DRV10964 will provide the output of the U phase

comparator on the FG pin until the motor speed drops below 10 Hz. When the motor speed is below 10 Hz the

device will enter into the Sleep state and the FG output will be held at a constant value based on the last BEMF

zero cross detection.

Closed Loop

FG = defined by FGS

Operation

Command PWM = 0%

Wait for Motor to Stop FG = U to CT BEMF comparator

Speed < 10 Hz

Sleep

FG = 0 or 1 (will not toggle)

图 7. TACH Feedback on Spin Down

7.3.5 Lock Detection

When the motor is locked by some external condition the DRV10964 will detect the lock condition and will take

action to protect the motor and the device. The lock condition must be properly detected whether it occurs as a

result of a slowly increasing load or a sudden shock.

The DRV10964 reacts to lock conditions by stopping the motor drive. To stop driving the motor the phase

outputs are placed into a high impedance state. To prevent the current which is flowing in the motor from being

returned to the power supply (VCC) the DRV10964 uses an Ant-Voltage Surge feature. For more information on

this feature, see Anti-Voltage Surge (AVS). After successfully transitioning into a high impedance state as the

result of a lock condition the DRV10964 will attempt to restart the motor after t_{OFF_LOCK}seconds.

The DRV10964 has a comprehensive lock detect function which includes 5 different lock detect schemes. Each

of these schemes detects a particular condition of lock as illustrated in 图 8.

DRV10964

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ZHCSEQ8 –MARCH 2016

No motor

Frequency Overflow

BEMF abnormal

Accelerate abnormal

Speed abnormal

Tri-state

and Restart

Logic

图 8. Lock Detect

The behavior of each lock detect scheme is described in the following sections.

7.3.5.1 Lock0: No Motor

The Phase U current is checked after transitioning from open loop to closed loop. If Phase U current is not

greater than 50mA then the motor is not connected. This is reported as a locked condition.

7.3.5.2 Lock1: Frequency Overflow

For most applications the maximum electrical frequency of the motor will be less than 3 kHz. If the motor is

stopped then the BEMF voltage will be zero. Under this condition, when the DRV10964 device is in the closed

loop mode, the sensor less control algorithm will continue to accelerate the electrical commutation rate even

though the motor is not spinning. A lock condition is triggered if the electrical frequency exceeds 3 kHz.

7.3.5.3 Lock2: BEMF Abnormal

For any specific motor, the integrated value of BEMF during half of an electrical cycle will be a constant as

illustrated by the shaded green area in 图 9. This is true regardless of whether the motor runs fast or slow. The

DRV10964 monitors this value and uses it as a criterion to determine if the motor is in a lock condition.

The DRV10964 uses the integrated BEMF to determine the Kt value of the motor during the initial motor start.

Based on this measurement a range of acceptable Kt values is established. This range is between 1/2 x Kt and 4

x Kt During closed loop motor operation the Ktc value is continuously updated. If the calculated Ktc goes beyond

the acceptable range a lock condition is triggered. This is illustrated in 图 10.

图 9. BEMF Integration

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ZHCSEQ8 –MARCH 2016

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4 x Kt

Ktc

0.5 x Kt

Lock detect

图 10. Abnormal Kt Lock Detect

7.3.5.3.1 Lock 3: Accelerate Abnormal

This lock condition is active when the DRV10964 device is operating in the closed loop mode. When the closed

loop commutation rate becomes lower than 1/2 of the previous commutation period then this is an indication that

the motor is not moving. Under this condition the accelerate abnormal condition will be triggered.

7.3.5.4 Lock4: Speed Abnormal

If the motor is in normal operation the motor BEMF will always be less than the voltage applied to the phase. The

DRV10964 sensorless control algorithm is continuously updating the value of the motor BEMF based on the

speed of the motor and the motor Kt as shown in 图 11. If the calculated value for motor BEMF is higher than the

applied voltage (U) for a certain period of time (t_{ON_LOCK}) then there is an error in the system. The calculated

value for motor BEMF is wrong or the motor is out of phase with the commutation logic. When this condition is

detected a lock detect is triggered.

BEMF = kt * speed

If speed > U / kt

Lock is triggered.

图 11. BEMF Monitoring

7.3.6 Short Circuit Current Protection

The short circuit current protection function shuts off drive to the motor by placing the motor phases into a high

impedance state if the current in any motor phase exceeds the short circuit protection limit I_SHT. The DRV10964

device will go through the initialization sequence and will attempt to restart the motor after the short circuit

condition is removed. This function is intended to protect the device and the motor from catastrophic failure when

subjected to a short circuit condition.

7.3.7 Anti-Voltage Surge (AVS)

Under normal operation the DRV10964 acts to transfer energy from the power supply to the motor to generate

torque, which results in angular rotation of the motor. Under certain conditions, however, energy which is stored

in the motor in the form of inductive energy or angular momentum (mechanical energy) can be returned to the

power supply. This can happen whenever the output voltage is quickly interrupted or whenever the voltage

applied to the motor becomes less than the BEMF voltage generated by the motor. The energy which is returned

to the supply can cause the supply voltage to increase. This condition is referred to as voltage surge.

DRV10964

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ZHCSEQ8 –MARCH 2016

The DRV10964 includes an anti-voltage-surge (AVS) feature which prevents energy from being transferred from

the motor to the power supply. This feature helps to protect the DRV10964 as well as any other components that

are connected to the power supply (VCC).

7.3.7.1 Protecting Against the Return of Mechanical Energy

Mechanical energy is typically returned to the power supply when the speed command is abruptly decreased. If

the voltage applied to the phase becomes less than the BEMF voltage then the motor will work as a generator

and current will flow from the motor back to VCC. This is illustrated in 图 12. To prevent this from happening, the

DRV10964 buffers the speed command value and limits the rate at which it is able to change. The AVS function

acts to ensure that the effective output amplitude (U) is maintained to be larger than the BEMF voltage. This

prevents current from becoming less than zero. The value of BEMF used to perform this function is calculated by

the motor Kt and the motor speed.

U = BEMF + I * Rm

BEMF = kt * speed

AVS: U_MIN= BEMF

If U < BEMF, I<0.

If U > BEMF, I>0.

图 12. Mechanical AVS

7.3.7.2 Protecting Against the Return of Inductive Energy

When the DRV10964 suddenly stops driving the motor, the current which is flowing in the motor’s inductance will

continue to flow. It flows through the intrinsic body diodes in the mosfets and charges VCC. An example of this

behavior is illustrated by the two pictures in the top half of 图 13. When the driver is active, the current flows from

S1 to the motor and then to S6 and is returned to ground. When the driver is placed into a high impedance (tri-

state) mode, the current goes flows from ground through the body diode of S2 to the motor and then through the

body diode of S5 to VCC. The current will continue to flow through the motor’s inductance in this direction until

the inductive energy is dissipated.

图 13. Inductive AVS

The lower two pictures in 图 13 illustrate how the AVS circuit in the DRV10964 device prevents this energy from

being returned to the supply. When the AVS condition is detected the DRV10964 device will act to turn on the

low side device designated as S6. This allows the current flowing in the motor inductance to be returned to

ground instead of being directed to the VCC supply voltage.

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ZHCSEQ8 –MARCH 2016

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7.3.8 Overtemperature Protection

The DRV10964 contains a thermal shut down function which disables motor operation when the device junction

temperature has exceeded T_SD. Motor operation will resume when the junction temperature becomes lower than

T_SD- T_{SD_HYS}

7.3.9 Undervoltage Protection

The DRV10964 contains an undervoltage lockout feature, which prevents motor operation whenever the supply

voltage (VCC) becomes too low. Upon power up, the DRV10964 will operate once VCC rises above V_{UVLO_H}

The DRV10964 will continue to operate until VCC falls below V_{UVLO_L}

7.3.10 CONFIG Configuration

The CONFIG pin provides an option for selecting the open loop to closed loop threshold. This is accomplished

with the selection of a resistor divider between VCC and GND which is connected to the CONFIG pin. See

Electrical Characteristics.

7.4 Device Functional Modes

7.4.1 Spin up Settings

7.4.1.1 Motor Kt and Rm

DRV10964 utilizes information about the motor's torque constant and resistance to control motor timing. These

parameters are measured during the initial motor spin up as shown in 图 14.

7.4.1.2 Motor Start

DRV10964 will start the motor using a procedure which is illustrated in 图 14.

Power On

Calibration

Align

40 ms

Resistance

Measurement

Open Loop

Accelerate

Coasting

Wait T_{OFF_LOCK}

Measurement

Close Loop

Closed Loop

Lock Detected

图 14. DRV10964 Initialization and Motor Start-up Sequence

7.4.1.3 Initial Speed Detect (ISD)

The ISD function is used to identify the initial condition of the motor.

Phase-to-phase comparators are used to detect the zero crossings of the motor’s BEMF voltage while it is

coasting (motor phase outputs are in high-impedance state). 图 15 shows the configuration of the comparators.

DRV10964

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Device Functional Modes (接下页)

degrees

图 15. Initial Speed Detect Function

The motor speed is determined by measuring the time between two rising edges of either of the comparators.

If neither of the comparator outputs toggle for a given amount of time (80 ms), the condition is defined as

stationary and the Align state will begin. If the comparators are toggling at a speed that is greater than this

threshold then the DRV10964 will wait for the motor to slow down until the toggling is less than the threshold and

it can be treated as stationary.

7.4.1.4 Align

To align the rotor to the commutation logic the DRV10964 applies a 50% duty cycle on phases V and W while

holding phase U at GND. This condition is maintained for 0.64 seconds. In order to avoid a sudden change in

current that could result in undesirable acoustics the 50% duty cycle is applied gradually to the motor over 0.3

seconds.

7.4.1.5 Handoff and Closed Loop

When the motor accelerates to the velocity defined by the voltage applied to the CONFIG pin, commutation

control transitions from open loop mode to closed loop mode. The commutation drive sequence and timing is

determined by the internal control algorithm and the applied voltage is determined by the PWM commanded duty

cycle input.

The selection of handoff threshold can be determined by experimental testing. The goal is to choose a handoff

threshold that is as low as possible and allows the motor to smoothly and reliably transition between the open

loop acceleration and the closed loop acceleration. Normally higher speed motors (maximum speed) require a

higher handoff threshold because higher speed motors have lower Kt and as a result lower BEMF. 表 2 shows

the configurable settings for the handoff threshold. Maximum speed in electrical hertz are shown as a guide to

assist in identifying the appropriate handoff speed for a particular application.

表 2. Motor Handoff Speed Threshold Options

MAXIMUM SPEED (Hz)

350 to approximately 400

<100

Hand Off Frequency (Hz)

CONFIG[3:0]

0x0

87.5

12.5

0x1

100 to approximately 150

150 to approximately 200

200 to approximately 250

250 to approximately 300

300 to approximately 350

350 to approximately 400

400 to approximately 450

450 to approximately 500

0x2

37.5

0x3

0x4

62.5

0x5

0x6

87.5

100

112.5

0x7

0x8

0x9

DRV10964

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Device Functional Modes (接下页)

表 2. Motor Handoff Speed Threshold Options (接下页)

MAXIMUM SPEED (Hz)

500 to approximately 560

560 to approximately 620

620 to approximately 700

700 to approximately 800

800 to approximately 900

>900

Hand Off Frequency (Hz)

CONFIG[3:0]

125

137.5

150

0xA

0xB

0xC

0xD

0xE

0xF

162.5

175

187.5

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8 Application and Implementation

注

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. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

DRV10964 is used in sensorless three-phase BLDC motor control. The driver provides a high performance, high

reliability, flexible and simple solution for compute fan applications. The following design shows a common

application of the DRV10964.

8.2 Typical Application

VCC

100k

VCC

PWM 10

PWMIN

FGS

VCC

CONFIG

FG Status

VCC

Direction

2.2 µF

GND

图 16. Typical Application Schematic

8.2.1 Design Requirements

表 3 lists several key motor characteristics and recommended ranges which the DRV10964 is capable of driving.

However, that does not necessarily mean motors outside these boundaries cannot be driven by DRV10964.

Recommended ranges listed in 表 3 can serve as a general guideline to quickly decide whether DRV10964 is a

good fit for an application. Motor performance is not ensured for all uses.

表 3. Key Motor Characteristics and Recommended Ranges

Rm (Ω)

Lm (µH)

Kt (mV/Hz)

f_{FG_max}(Hz)

Recommended Value

2.5 ~ 10

50 ~ 1000

1 ~ 100

1300

DRV10964

ZHCSEQ8 –MARCH 2016

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Rm - Motor phase resistance between phase to phase;

Lm - Motor phase to phase inductance between phase to phase;

Kt - Motor BEMF constant from phase to center tape;

f_{FG_max}- Maximum electrical frequency. Maximum motor speed can be calculated from:

•

If FGS = 1, RPM = (f_{FG_max}× 3 x 60)/ number of pole pairs

If FGS = 0, RPM = (f_{FG_max}× 120)/ number of pole pairs

8.2.2 Detailed Design Procedure

1. Refer to Design Requirements and make sure your system meets the recommended application range.

2. Refer to the DRV10964 Tuning Guide and measure the motor parameters.

3. Refer to the DRV10964 Tuning Guide. Configure the parameters using DRV10964 GUI, and optimize the

motor operation. The Tuning Guide takes the user through all the configurations step by step, including: start-up

operation, closed-loop operation, current control, initial positioning, lock detection, and anti-voltage surge.

4. Build your hardware based on Layout Guidelines.

5. Connect the device into system and validate your system solution

8.2.3 Application Curves

NOTE: FG_OUT Signal Being Held HIGH During Locked Rotor

Condition (Stall)

图 18. Reference PCB Start-Up (Align-Acceleration) Profile

图 17. Reference PCB Sinusoidal Current Profile

图 19. Reference PCB Open Loop and Close Loop

图 20. Reference PCB Closed Loop

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9 Power Supply Recommendations

The DRV10964 is designed to operate from an input voltage supply, V(VCC), range from 2.1 and 5.5 V. The user

must place a 2.2-μF ceramic capacitor rated for VCC as close as possible to the VCC and GND pin.

10 Layout

10.1 Layout Guidelines

The package uses an exposed pad to remove heat from the device. For proper operation, this pad must be

thermally connected to copper on the PCB to dissipate heat. On a multi-layer PCB with a ground plane, this can

be accomplished by adding a number of vias to connect the thermal pad to the ground plane. On PCBs without

internal planes, copper area can be added on either side of the PCB to dissipate heat. If the copper area is on

the opposite side of the PCB from the device, thermal vias are used to transfer the heat between top and bottom

layers.

For details about how to design the PCB, refer to TI application report, PowerPAD™ Thermally Enhanced

Package (SLMA002), and TI application brief, PowerPAD™ Made Easy (SLMA004), available at www.ti.com. In

general, the more copper area that can be provided, the more power can be dissipated.

10.2 Layout Example

2.2 uF

GND

100k

10 PWM

FG 1

100k

FGS 2

9 CONFIG

8 FR

GND

(PPAD)

VCC 3

W 4

7 U

6 V

GND 5

图 21. DRV10964 Layout Example

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11 器件和文档支持

11.1 社区资源

The following links connect to TI community resources. Linked contents are 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.

TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration

among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help

solve problems with fellow engineers.

Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and

contact information for technical support.

11.2 商标

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

11.3 静电放电警告

这些装置包含有限的内置 ESD 保护。存储或装卸时，应将导线一起截短或将装置放置于导电泡棉中，以防止 MOS 门极遭受静电损

伤。

11.4 Glossary

SLYZ022 — TI Glossary.

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

12 机械、封装和可订购信息

以下页中包括机械、封装和可订购信息。这些信息是针对指定器件可提供的最新数据。这些数据会在无通知且不对

本文档进行修订的情况下发生改变。欲获得该数据表的浏览器版本，请查阅左侧的导航栏。

重要声明

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IMPORTANT NOTICE

邮寄地址：上海市浦东新区世纪大道1568 号，中建大厦32 楼邮政编码： 200122

PACKAGE OPTION ADDENDUM

www.ti.com

10-Dec-2020

PACKAGING INFORMATION

Orderable Device

Status Package Type Package Pins Package

Eco Plan

Lead finish/

Ball material

MSL Peak Temp

Op Temp (°C)

Device Marking

Samples

Drawing

Qty

(1)

(2)

(3)

(4/5)

(6)

DRV10964FFDSNR

DRV10964FFDSNT

ACTIVE

SON

DSN

3000 RoHS & Green

250 RoHS & Green

NIPDAU

Level-2-260C-1 YEAR

-40 to 125

964FF1

NIPDAU

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

⁽²⁾RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance

do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may

reference these types of products as "Pb-Free".

RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.

Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based

flame retardants must also meet the <=1000ppm threshold requirement.

⁽³⁾MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

⁽⁴⁾There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

⁽⁵⁾Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation

of the previous line and the two combined represent the entire Device Marking for that device.

(6)

Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two

lines if the finish value exceeds the maximum column width.

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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

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Addendum-Page 2

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DRV10964 [TI]

相关型号：

DRV10964FFDSNR

DRV10964FFDSNT

DRV10970

DRV10970PWP

DRV10970PWPR

DRV10974

DRV10974PWPR

DRV10974RUMR

DRV10975

DRV10975PWP

DRV10975PWPR

DRV10975RHFR