BD2046AFJ, BD2056AFJ

Technical Note

7/13

www.rohm.com

2009.05 - Rev.A

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



Block diagram

Gate

Logic1

OCD1

Charge

Pump1

TSD1

UVLO

Charge

Pump2

OCD2

Gate

Logic2

TSD2

/EN1

EN1

IN

/EN2

EN2

GND

/OC1

OUT1

OUT2

/OC2

Delay

Delay

1

2

8

7

GND

IN

/OC1

OUT1

3

/EN1

(EN1)

4

6

5

OUT2

/OC2

Top View

/EN2

(EN2)

Fig.36 Block diagram

Fig.37 Pin Configuration



Pin description

○

BD2046AFJ

Pin No.

Symbol

I / O

Pin function

1

GND

I

Ground.

2

IN

I

Power supply input.

Input terminal to the switch and power supply input terminal of the internal circuit.

3, 4

/EN

I

Enable input.

Switch on at Low level.

High level input > 2.0V, Low level input < 0.8V.

5, 8

/OC

O

Error flag output. Low at over current, thermal shutdown.

Open drain output.

6, 7

OUT

O

Switch output.

○

BD2056AFJ

Pin No.

Symbol

I / O

Pin function

1

GND

I

Ground.

2

IN

I

Power supply input.

Input terminal to the switch and power supply input terminal of the internal circuit.

3, 4

EN

I

Enable input. Switch on at High level.

High level input > 2.0V, Low level input < 0.8V

5, 8

/OC

O

Error flag output. Low at over current, thermal shutdown.

Open drain output.

6, 7

OUT

O

Switch output.