IR3220S_技术文档

Data Sheet No.PD60180-C

IR3220S

FULLY PROTECTED H-BRIDGE FOR D.C. MOTOR

Features

The IR3220S is a fully protected dual high side switch I.C that

integrates an H–bridge motor controller with two very efficient

Programmable PWM In-rush

high side MOSFETs in a single 20-pin package. The IR3220S

Current Limitation (e.g 18A)

combines with the two low side IRF7484Q MOSFETs as few as

10 external passive components to provide a complete, fully op-

erational and fully protected H-bridge control actuator with for-

ward, reverse, braking and non-braking modes without the need

of a micro-controller.

6 A Continuous Current Capability

without Heat Sink (2 x 13 mΩ)

Over-Temperature (165 °C) and

Over-Current (30A) Protections

Functional Description

The high side switches provide the direction capability and the H-

bridge protection. The low side MOSFETs bring the flexibility by

offering the high frequency switching ability. Therefore, crude

start-up of the motor is avoided and replaced by a smooth and

stress-less speed ramp-up.

20 kHz PWM Oscillator Embedded

Low & High Frequency Switching

Operation (self adaptive dead-time)

Easy Speed / Torque Control

(analog duty cycle input)

The IR3220S features shoot-through protection for each leg, H-

bridge logic control, soft-start sequence and over-current / over-

temperature shutdown protections. Two input signals (IN1 & IN2)

select the operating modes while the PWM soft-start sequence

cycles the corresponding active low side MOSFET in order to

limit the motor in-rush current. The soft-start sequence is pro-

grammed by an RC time constant and reset itself automatically.

Thanks to the inner PWM oscillator, the IR3220S can also be

the final stage of an overall torque or speed loop. If needed, an

external clock may force the H-bridge switching operation. This

can be combined with low frequency PWM operation through

the IN1(2) inputs.

Braking / Non-Braking Modes

Sleep Mode (braking) for

Automotive Actuator

Packages

The IR3220S is a Co-pack IPS product offering very low Rds(on)

and a high level of functionality and protection. Its open architec-

ture and programmability helps the designer to optimize each

motor drive upon the application requirements at a very low cost.

For automotive actuators, the motor is kept shorted even during

the low consumption sleep mode. Shoot-through protection, over-

temperature & over-current shutdowns, self-adaptive dead-time

and PWM circuitries are described in details in the AN 1032

Application Note. A general purpose method to help rating the

soft-start sequence as well as layout and thermal considerations

are also covered. Finally, a 6A DC motor actuator with a PCB

size down to 1 Inch² is suggested in the document.

8-Lead SOIC

IRF7484Q

20-Lead SOIC

(wide body)

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1

IR3220S

Functional Block Diagram (see AN-1032 for a detailed description of each block)

SS

Vrc

1k

0.5k

5.5 V Ref.

+

-

Soft Start duty cycle

S S reset

10 mA

Gnd

Oscillator

VCC

IN 2

VCC

IN 1

H Bridge logic control

& status feedback

40 V Active Clamp

DG

Over current

shutdown

Over current

shutdown

Over temp.

protection

Shoot-through

protection

Shoot-through

protection

50

Low Side

Driver

Low Side

Driver

G 2

G 1

50

M 2

Gnd

M 1

Thanks to the self-adaptive dead-time circuitry, the low side MOSFET of each leg is driven in the opposite

phase of the high side one without any conflict. Thus, the single IN1 signal turns on the leg M1 (and IN2, the

output M2). Consequently, when both IN1 and IN2 are low, the quiescent state of the H-bridge is the Braking

Mode (the two low side MOSFETs on). The over-temperature circuitry and the two over-current protections

(one per leg) protect the IC and flag the DG pin. The thermal shutdown also covers the body diode over-

heating. Fault conditions are reset by cycling the corresponding IN1(2) input. Each leg appears independent

so that the PWM soft-start management is greatly simplified and makes the 20kHz oscillator block almost a

separate function. The positive input of the PWM comparator is accessible on the SS pin. An external analog

voltage or a RC network can either drive the duty cycle. It has to be said that a clock signal (< 20 kHz) applied

on this input will directly drive the low side MOSFETs. A 5V voltage source is embedded in the I.C ( switched

off while in the sleep mode ) so that no additional power supply is needed for the soft-start RC time constant.

Its capacitor is discharged through the ‘ ’ SS reset ‘ ’ circuitry every time IN1 equals IN2. Thus, the soft-start

sequence is ready to operate whichever the formerly braking mode was.

2

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IR3220S

Soft-Start Sequence

IN1

(IN2)

t

Vss+

SS

Vss-

M1-M2

(M2-M1)

Duty cycle modulation follows SS voltage

Tss ( approximately 1.4 x RC time constant )

Trd

Truth Table

IN1 IN2

MODES

DG

HS1

OFF

ON

LSS1

ON

HS2

OFF

ON

LSS2

SS reset

ON

L

Stand-by with braking - sleep mode**

Forward rotation (normal operation)

Forward rotation (protection triggered)

Reverse rotation (normal operation)

Reverse rotation (protection triggered)

Stand-by without braking

H

L

H

L

ON

L

H

L

ON*

OFF

ON*

OFF

ON

L

OFF

H

L

OFF

H

* During Soft-start sequence, the low side part is switching.

** Protections are reset in this mode

The IR 3220S over-current is set at 30A which is low enough to protect the whole application. The soft-start RC

time constant has to be designed in order to keep the maximum in-rush current below the I shutdown (application

worst case - see AN 1032 ). The total switching sequence is about 1.4 times the RC time constant. A smoother

start-up is even achievable by slightly increasing the RC values. However, the soft-start sequence should

remain short enough not to trip the over-temperature protection (Tj while free-wheeling). The truth table shows

that the soft-start sequence can be interrupted at any time. But a minimum time is needed prior to any change

in the direction or re-start of a new SS sequence. Actually, the capacitor of the RC network has to be discharged

and the motor fully stopped first otherwise the over-current protection might trip during the next turn-on.

The protections turn off the high side MOSFETs so that no braking sequence follows the fault detection. Both

IN1 and IN2 have to go low for a minimum time in order to reset the fault circuitry. When both inputs are back

to the low level, the H-bridge is in the braking mode and the motor shorted. In this mode, no protection is

activated and the peak current due to the braking is not monitored. After 300 ms, the I.C sleep mode is

activated and the consumption is reduced down to few micro-amps. The low side gate drivers keep the gates

high so the motor remains shorted. When using end switches, the I.C goes into the low consumption mode as

soon as the mechanical stop are reached. When interfacing such switches directly to the IR 3220S, de-bounc-

ing RC networks have to be implemented on the input pins in order to prevent false over-current detection.

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3

IR3220S

Typical Connection

+ 5 V

+ Bat.

VCC

Vrc

10 k

Gnd

DG

IN 2

Diagnostic

Feedback

IR 3220S

SS

IN 1

LS gate 1

M 2

LS gate 2

M 1

1 k

R

Clockwise motion

10 k

D

S

D

S

Counter clockwise

motion

10 k

G

SO 8 Mosfet

C

Deboucing

RC networks

( e.g 10 nF )

Micro

Controller

Electrical stop

0 V

IN1

t

IN2

SS

M1

Soft-Start sequence

t

M2

Stand-by Mode

(M1 & M2 opened)

Braking Mode

(M1 & M2 grounded)

Motor

Current

t

IN1(2) & M1(2) Timing Diagrams

4

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IR3220S

The PWM generator is based on a 3V saw-tooth oscillator. The soft-start sequence takes advantage of the RC

charge profile in order to perform a smooth duty cycle variation. When the SS pin is below 1.2V, no PWM signal

is sent to the low side MOSFETs. When it exceeds 4.2V, they are permanently ON. By designing the proper RC

network, the start-up can either be very slow without any in-rush current or, fast and efficient by shortening the

PWM sequence. In addition to the quiescent braking mode, the IR 3220S is able to open the four MOSFETs

simultaneously if the mechanical load requires its natural slow-down (stand-by mode without braking). The

four modes and their corresponding DC motor current profiles are summarized in the Timing Diagram.

Over-load protection is achieved thanks to the I.C temperature shutdown protection. By using the recom-

mended part number and the proper cooling, the whole H-bridge is protected by the IR 3220S’ s inner over-

temperature circuitry (see AN 1032). A micro-controller is able to directly drive the PWM duty cycle by forcing

a 0 to 5V voltage on the SS pin (e.g. through a 10K resistor). Thus, closing a speed or torque control loop for

advanced applications becomes very easy. Since the low side MOSFETs are the only ones switching, the

IR 3220S body diodes offer the freewheeling path to the motor. The power dissipated in each body diode while

switching may appear high enough to trip the over-temperature protection. For permanent switching operation,

external Schottky diodes should be implemented between each output (M1 & M2) and the VCC pin.

Permanent Switching Operation

(without external RC time constant)

+5V

+Bat

Additional

Schottky diodes

Over-voltage

protection

Additional Schottky diodes

have to be implemented if

the I.C temperature appears

too high.

Vcc

Micro

Controller

Dg

Diagnostic

In1

In2

ss

S

IR 3220

Direction &

Braking

DC Motor

A over-voltage protection

may be needed depending

on the power supply wire

length

IRF 7484

Speed

Gnd

Star Connection

0V

-Bat

Copper plates added to the footprints will improve the cooling.

However, the low side MOSFETs should always remain colder

and thermally independent from the IR 3220S. The power path

has to be designed carefully and shall include both a decoupling

capacitor (e.g. 100 nF ceramic) and a reservoir capacitor (e.g.

Cres ( uF). = I pk soft-start (A) x 25). The window-lifter is a

good example where the IR 3220S’ s PWM ability greatly en-

hances the application. The current is monitored thanks to a

shunt and sent back to the micro-controller which takes over

the torque control loop (anti-pinch function).

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5

IR3220S

In addition, the soft-start sequence pro-

vides a smooth motion of the window.

Torque or speed controls are also

achievable without any micro-control-

ler. With a few additional components,

the IR 3220S can be the ‘ ’ power stage‘ ’

of an overall analog control loop. The

SS pin is then used as the PWM duty

cycle input (continuous switching op-

eration requires high cooling capabil-

ity)

When an obstacle is encountered, the uP

controls the torque thanks to the SS pin.

+Bat

Dg

In1

In2

ss

IR 3220

µP

IRF 7484

Shunt

-Bat

For actuators, the PWM Soft Start sequence helps reduce the speed before reaching the end switches. There-

fore, the braking time is very short and the actuator final position is then accurate and repeatable as shown

hereunder. Mechanical stops under torque control are also possible by controlling the motor current through

the PWM duty cycle.

speed

braking

Rev

Fwd

+ Vcc

DG

Soft-Start

( PWM )

Low Speed

( PWM )

motion

Vcc Vcc Vcc Vcc

Vrc

SS

DG

R1

IR 3220

2

IN

1

G2

M2 M2 M2 Gnd IN

M1 M1 M1

G1

Fwd

Rev

1000 uF

C

R2

100 nF

D D D D

IRF7484

D D D D

G

IRF7484

S

S S

S

S S

GND

Fwd

Rev

6

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IR3220S

Absolute Maximum Ratings

Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage param-

eters are referenced to Gnd lead. (T

= 25^oC unless otherwise specified). Symbols with (2) refer to M2 output.

Ambient

Symbol

Parameter

Min.

Max.

Units

V

m1 (2)

(2)

Maximum M1 (M2) voltage (active clamp)

Maximum IN 1 (IN 2) voltage

cc-37

-0.3

-1

cc+0.3

5.5

45

in1

V

Vcc/gnd

I in1 (2)

Vg1 (2)

Vss

Maximum Vcc pin to GND pin voltage

Maximum IN1 (IN 2) current

10

mA

Maximum Gate 1 ( Gate 2 ) voltage

Maximum SS voltage

-0.3

7.5

5.5

1

V

Vrc

Maximum Vrc voltage

Irc

Maximum output current of the Vrc pin

Maximum diagnostic output voltage

Maximum diagnostic output current

Diode max. permanent current (Rth=80°C/W) (1)

(Rth=60°C/W) (1)

mA

V

—

Vdg

-0.3

5.5

10

Idg

-1

mA

Isd cont.

2.0

—

A

3.0

15

Isd pulsed

ESD 1

ESD 2

PD

Diode max. pulsed current (1)

Electrostatic discharge ( human body model C=100pF, R=1500Ω)

Electrostatic discharge ( machine model C=200pF, R=0Ω, L=10µH)

Maximum power dissipation ( Rth = 80°C/W )

Max. storage & operating junction temperature

Lead temperature ( soldering 10 seconds )

4

kV

W

0.5

1.5

+150

300

60

—

TJ max.

-40

°C

T

L

—

Vcc/gnd max. Maximum Vcc to GND voltage (0.4 s - single pulse)

V

Ig1 (2) max.

Ig1 (2) avg.

Maximum transient gate current (Ton < 5µS)

100

10

mA

Maximum average gate current

(1) Limited by junction temperature.

Thermal Characteristics

Symbol

Parameter

Typ.

80

Max.

Units

R

1

2

Junction to ambient thermal resistance (std footprint)

Junction to ambient thermal resistance (1" sq. footprint)

—

th

°C/W

60

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7

IR3220S

Recommended Operating Conditions

These values are given for a quick design. For operation outside these conditions, please consult the application notes.

Symbol

Parameter

Min.

8

Max.

28

Units

V

cc

Continuous Vcc voltage (2)

(2)

High level IN 1 (IN 2) input voltage

Low level IN 1 (IN 2) input voltage

Continuous output current (Std footprint - Tj = 150°C)

4

5.5

V

in1

-0.3

0.9

Iout Ta=85°C

—

6.0

5.0

A

Iout Ta=105°C Continuous output current (Std footprint - Tj = 150°C)

R in

Recommended resistor in series with IN pin

Recommended pull-up resistor on DG pin

Soft-Start resistor

0.5

10

20

0.1

0

5

20

R dg

R

kΩ

200

3.3

50

C

Soft-Start capacitor

µF

Ω

R gate

Lm min.

Recommended gate resistor for Low Side Switch

Minimum motor inductance required

10

µH

—

Static Electrical Characteristics

(T = 25^oC, V = 14V unless otherwise specified.)

j

cc

Symbol

Parameter

Min. Typ. Max. Units Test Conditions

o

Rds1 on

Rds2 on

Vcc oper.

Vclamp1 (2)

Vf1 (2)

ON state resistance Tj =

Functional voltage range

—

5.5

37

—

1.0

—

0.8

—

0.2

11

18

—

13

22

35

48

—

25 C

mΩ

Vin1,2 = 5V,1m1,2 = 5A

o

150 C

Vcc to M1 (M2) clamp voltage

Body diode 1 (2) forward voltage

40

0.9

10

8

Id =10mA see Figs.1,2

Id = 5A, Vin1,2 = 0V

V

IM1 (2) leakage M1 (M2) output leakage current

50

12

—

Vm1, 2 = 0V; Tj = 25°C

Vin1(2) = 0V, Vcc=12V

µA

Icc off

Supply current when off (sleep mode)

Supply current when on

Icc on

mA

V

Vin1 = 5V

Vdgl

Low level diagnostic output voltage

Diagnostic output leakage current

IN1 (IN2) high threshold voltage

IN1 (IN2) low threshold voltage

ON state IN1 (IN2) positive current

Vcc UVLO positive going threshold

Vcc UVLO negative going threshold

SS high level threshold

0.4

—

2.6

2.0

30

5

Idg = 1.0mA

Vdg = 4.5V

Idg leakage

Vih1 (2) th.

Vil1 (2) th.

Iin1 (2)

Vccuv+

Vccuv-

Vss+

10

3.4

—

µA

V

80

—

µA

Vin1, 2 = 5V

4

—

V

4.2

1.2

0.1

5.3

0.7

4.8

—

Vss-

SS low level threshold

Iss leakage

Vrc

IN1(2) hys

SS pin leakage current

10

—

1.5

µA

Vss = 5V

Typical voltage of the Vrc pin

IN1 (2) input hysteresis

Irc = 0.25mA

Iin = 1mA

V

8

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IR3220S

Switching Electrical Characteristics

V

= 14V, Resistive Load = 3.0Ω, T = 25^oC, (unless otherwise specified).

j

cc

Symbol

Parameter

Min. Typ. Max. Units Test Conditions

Td

Turn-on delay time

55

—

100

30

on

T

µs

Rise time to Vout = Vcc -5V

Rise time from the end of Tr1 to

3

r1

see figure 3

see figure 4

Tr2

V

= 90% of V

cc

40

3

—

200

—

out

Turn ON d

d

V/µs

µs

V/dt (on)

V/dt

Tdoff

Tf

dV/dt (off)

Turn-off delay time

30

16

2

80

50

—

Fall time to Vout = 10% of Vcc

Turn OFF dV/dt

V/µs

IN1 (2) max. freq. Max. frequency on IN1 (IN2)

500

Hz

dt=0.5

—

none braking mode(2)

Soft-Start freq.

Soft-Start oscillator frequency

15

50

22

80

30

—

kHz

mA

ms

V

Ig1 (2) min.

Trd

Vg1

Min. Gate 1 (Gate 2) current

low side driver

Min. IN1 (2) OFF time to reset SS

Gate 1 (gate 2) voltage

—

8.0

7

—

C=3.3µF, IN1 = IN2

µs

V

Tin1 (2)

Vst

Minimum IN1 (2) ON state for operation

Shoot-through protection threshold

200

1.1

350

2.3

550

3.3

See AN-1032

Protection Characteristics

Symbol Parameter

Min. Typ. Max. Units Test Conditions

Tsd

Over-temperature threshold

Over-current threshold

Reset time

—

24

—

165

30

—

38

—

^oC

See figure 2

IN1 = IN2 = 0V

Isd

A

Treset

100

µS

Note 1: The low side switches present sufficient cooling capability in order to have the whole H Bridge function protected

by the IR3220S inner temperature sensor.

Note 2: Switching in the none braking mode consists in cycling one of the inputs while the other one is held at the high logic

level.

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9

IR3220S

Lead Definitions

Vcc

M1

M2

G1

Positive power supply

IN1

IN2

Dg

Vrc

SS

Logic input 1 ( Leg 1 Cdt. / mode )

Logic input 2 ( Leg 2 Cdt. / mode )

Diagnostic output ( open drain )

Voltage ref. output ( soft-start RC )

RC soft-start input ( the voltage on this input

drives the switching duty cycle )

Motor 1 output ( high side source - leg 1 )

Motor 2 output ( high side source - leg 2 )

Gate 1 drive output ( low side gate - leg 1 )

Gate 2 drive output ( low side gate - leg 2 )

Power supply return

G2

Gnd

Lead Assignments

Vcc Vcc m1 m1 m1 nc g1 Gnd In1Vrc

D D D D

S S S G

Vcc Vcc m2 m2 m2 nc g2 In2 Dg SS

20 Lead - SOIC (wide body)

8 Lead - SOIC

IR3220S

IRF7484Q

Part Number

10

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IR3220S

T clamp

5 V

0 V

IN1 (2)

t > T reset

t < T reset

IN1 (2)

I shutdown

I M1(2)

M1(2)

( + Vcc )

T shutdown

Tsd

Tj

0 V

5 V

V clamp

DG

0 V

(

see IPS Appl . Notes to evaluate power dissipation )

Figure 2 - Protection Timing diagram

Figure 1 - Active clamp waveforms

IN 1(2)

IN1(2)

Vcc

90%

Vcc - 5 V

M1(2)

dV/dt off

M1 (2)

dV/dt on

Tr 1

10%

Tf

Td off

Td on

Tr 2

Figure 3 - Switching Time Definitions (turn-on)

Figure 4 - Switching Time Definitions (turn-off)

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11

IR3220S

5

4

3

2

1

50

40

30

20

10

0

----- IN1h(2)

-- -- IN1l(2)

- - - -IN1(2) hysteresis

0

-50 -25

0

25

50

75

100 125 150

-50 -25

0

25 50 75 100 125 150

Figure 5 - IN1 (2) thresholds (V) vs Tj (^oC)

Figure 6 - IN1 (2) current (µA) vs Tj (^oC)

50

40

30

20

10

0

50

40

30

20

10

0

-50 -25

0

25 50 75 100 125 150

-50 -25

0

25 50 75 100 125 150

Figure 8 - Typ. I shutdown (A) vs Tj (^oC)

Figure 7 - Iccoff (µA) vs Tj (^oC)

12

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IR3220S

30

28

26

24

22

20

18

16

14

12

10

8

20

15

10

5

Vf@ 25°C

Vf@ 150°C

6

4

2

0

2

4

6

8

10 12 14 16 18 20

0,0

0,2

0,4

0,6

0,8

1,0

1,2

Figure 9 - Body diode : Ids (A) vs Vds (V)

Figure 10 - Rds(on) (mΩ) vs Vcc (V)

30

20

10

0

15

12,5

10

- - - 1’’ square footprint

------- standard footprint

7,5

5

2,5

0

-50

-25

0

25

50

75

100

125

150

-50

0

50

100

150

200

Figure 11 - Rdson (mΩ) vs Tj (^oC)

Figure 12 - Max. Cont. current (A) vs Amb. Temp. (^oC)

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13

IR3220S

1000

100

10

1

100

0,1

0,01

rth std footprint

10

1,E-06

1,E-05

1,E-04

1,E-03

1,E-02

1,E-01

1,E+00

1,E+01

1,E+02

Figure 13 - Transient Rth (^oC/W) vs Time (S)

Figure 14 - Isd (A) vs Time (s)

Case Outline - 8 Lead SOIC

(MS-012AA) 01-0021 09

14

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IR3220S

Case Outline

20 Lead SOIC (wide body)

(MS-013AC) 01-3080 00

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105

Data and specifications subject to change without notice. 9/18/2003

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15


型号：	IR3220S
厂家：	Infineon
描述：	FULLY PROTECTED H-BRIDGE FOR D.C. MOTOR 全面保护H-桥直流电机运动控制电子器件信号电路光电二极管电动机控制电机
文件：	总15页 (文件大小：547K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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