Technical Note

3/8

BD63940EFV, BD63960EFV

www.rohm.com

2012.02 - Rev.A

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

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Terminal function

1) BD63940EFV/BD63960EFV

Pin

No.

Pin name

Function

Pin

No.

Pin name

Function

1

PGND

Ground terminal

13

IN1A

Logic input terminal

2

IN2B

Logic input terminal

14

PGND

Ground terminal

3

VREF2

Output current value setting terminal

15

VCC1

Power supply terminal

4

CR2

Connection terminal of CR for setting

PWM frequency

16

OUT1A

H bridge output terminal

5

NC

Non connection

17

RNF1

Connection terminal of resistor for output

current detection

6

TEST

Terminal for testing

(used by connecting with GND)

18

OUT1B

H bridge output terminal

7

GND

Ground terminal

19

OUT2B

H bridge output terminal

8

PS

Power save terminal

20

RNF2

Connection terminal of resistor for output

current detection

9

CR1

Connection terminal of CR for setting

PWM frequency

21

OUT2A

H bridge output terminal

10

VREF1

Output current value setting terminal

22

VCC2

Power supply terminal

11

IN1B

Logic input terminal

23

NC

Non connection

12

NC

Non connection

24

IN2A

Logic input terminal

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Block diagram･Application circuit diagram･Input output equivalent circuit diagram

Fig.1 Block diagram & Application circuit diagram

39kΩ

1000pF

Set the PWM frequency.

Setting range is

C:470pF～4700pF

R:10kΩ～100kΩ

39kΩ

1000pF

Set the PWM frequency.

Setting range is

C:470pF～4700pF

R:10kΩ～100kΩ

Terminal for testing.

Please connect to GND.

0.3Ω

Bypass capacitor.

Setting range is

100uF～470uF(electrolytic)

0.01uF～0.1uF(multilayer ceramic etc.)

Resistor for current detection.

Setting range is

0.2Ω～0.5Ω(BD63940EFV)

0.2Ω～0.4Ω(BD63960EFV)

0.3Ω

Be sure to short VCC1 & VCC2.

0.1uF

100uF

VREF1

CR1

10

Predriver

Current

Limit

Comp.

15

VCC1

18

OUT1B

ONE

SHOT

16

OUT1A

17

RNF1

9

OCP

Predriver

Current

Limit

Comp.

22

VCC2

19

OUT2B

21 OUT2A

20

RNF2

6

TEST

IN1B

IN1A

11

13

LOGIC

VREF2

CR2

3

ONE

SHOT

4

IN2B

IN2A

2

24

LOGIC

OCP

7

GND

14

PGND

TSD

OVLO

UVLO

8PS

Regulator

RESET

1

PGND

Resistor for current detection.

Setting range is

0.2Ω～0.5Ω(BD63940EFV)

0.2Ω～0.4Ω(BD63960EFV)