Technical Note

3/8

BD6380EFV/BD6381EFV

www.rohm.com

2012.02 - Rev.A

© 2012 ROHM Co., Ltd. All rights reserved.

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Terminal function･Block diagram･Application circuit diagram

1) BD6380EFV / BD6381EFV

Pin

No.

Pin name

Function

Pin

No.

Pin name

Function

1

GND

Ground terminal

13

RNF2

Connection terminal of resistor for

output current detection

2

PS

Power save terminal

3

VLIM1

Output current limit setting terminal

14

OUT2B

H bridge output terminal

4

SENSE1

Input terminal of current limit comp.

15

OUT2A

H bridge output terminal

5

CR1

Connection terminal of CR for setting

PWM frequency

16

VM2

Power supply terminal for motor

17

NC

Non connection

6

IN1A

Logic input terminal

18

IN2B

Logic input terminal

7

IN1B

Logic input terminal

19

IN2A

Logic input terminal

8

NC

Non connection

20

CR2

Connection terminal of CR for setting

PWM frequency

9

VM1

Power supply terminal for motor

10

OUT1A

H bridge output terminal

21

SENSE2

Input terminal of current limit comp.

11

OUT1B

H bridge output terminal

22

VLIM2

Output current limit setting terminal

12

RNF1

Connection terminal of resistor for

output current detection

23

VREF

Reference voltage output terminal

Fig.1 Block diagram & Application circuit diagram of BD6380EFV / BD6381EFV

Resistor for current. detecting.

Setting range is

0.1Ω～1.0Ω

Bypass capacitor.

Setting range is

10uF～470uF(electrolytic)

0.01uF～0.1uF

(multilayer ceramic etc.)

Set

the

PWM

frequency.

Setting range is

C:470pF～4700pF

R:10kΩ～100kΩ

VM1

VLIM2

CR2

VCC

IN1A

IN1B

CR1

IN2A

IN2B

VLIM1

OUT1B

SENSE1

RNF1

VM2

SENSE2

OUT2B

RNF2

39kΩ

1000pF

39kΩ

1000pF

0.3Ω

0.3Ω

Predriver

Current Limit Comp.

9

CR

Timer

Current Limit Comp.

CR

Timer

Predriver

TSD

UVLO

GND

20

6

7

5

19

18

11

4

12

16

15

21

14

13

10

47uF

0.1uF

Resistor for current. detecting.

Setting range is

0.1Ω～1.0Ω

4.7uF

0.1uF

Bypass capacitor.

Setting range is

4.7uF～47uF(electrolytic)

0.01uF～0.1uF(multilayer ceramic etc.)

VREF

23

Logic

22

3

VREF

Set the PWM frequency.

Setting range is

C:470pF～4700pF

R:10kΩ～100kΩ

You can devide the

reference voltage by

external resistor, and use

it for output current limit

setting.

OCP

24

1

OUT2A

OUT1A