BD9102FVM, BD9104FVM, BD9106FVM

Technical Note

7/17

www.rohm.com

2009.05 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

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Block diagram, Application circuit

【

BD9102FVM,BD9104FVM】

Fig.37 BD9102FVM BD9104FVM TOP View

Fig.38 BD9102FVM BD9104FVM Block diagram

Fig.39 BD9106FVM TOP View

Fig.40 BD9106FVM Block diagram

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Pin No. & function table

Pin No.

Pin name

PIN function

1

Output voltage detect pin/ ADJ for BD9106FVM

2

ITH

GmAmp output pin/Connected phase compensation capacitor

3

EN

Enable pin(Active High)

4

GND

Ground

5

PGND

Nch FET source pin

6

SW

Pch/Nch FET drain output pin

7

Pch FET source pin

8

VCC power supply input pin

8

7

6

5

SW

PGND

1

2

3

4

ITH

EN

GND

TOP View

8

7

6

5

SW

PGND

1

2

3

4

ADJ

ITH

EN

GND

TOP View

BD9106FVM

OSC

UVLO

TSD

Current

Sense/

Protect

Driver

Logic

+

Soft

Start

8

7

6

5

4

2

1

3

RQ

S

EN

10μF

5V

Input

4.7μH

SW

10μF

Output

PGND

GND

ITH

SLOPE

Current

Comp.

Gm Amp.

CLK

OSC

UVLO

TSD

Current

Sense/

Protect

Driver

Logic

+

Soft

Start

8

7

6

5

4

2

1

3

RQ

S

EN

10μF

5V

Input

4.7μH

SW

10μF

Output

PGND

GND

ITH

ADJ

SLOPE

Current

Comp.

Gm Amp.

CLK