MB3789 View Datasheet(PDF) - Fujitsu

Part Name

Description

View to exact match

MB3789

Switching Regulator Controller

Fujitsu 

MB3789

s PIN DESCRIPTION

Pin no.

7

8

6

10

9

11

Pin symbol

–IN1

+IN1

FB1

–IN2

+IN2

FB2

13

CB

5

SCP

12

DTC

15

OUT

I/O

Function

I Error amplifier 1 inverting input pin

I Error amplifier 1 noninverting input pin

O Error amplifier 1 output pin

I Error amplifier 2 inverting input pin

I Error amplifier 2 noninverting input pin

O Error amplifier 2 output pin

Output bootstrap pin.

— Connect a capacitor between the CB and OUT pins to bootstrap the

output transistor.

— Capacitor connection pin for short-circuit protection circuit

I Dead time control pin

O Totem-pole output pin

3

CT

—

Sawtooth waveform frequency setting capacitor/resistor connection

pin

4

SYNC

I External sync signal input pin

1

VCC1

— Reference power supply, control circuit power-supply pin

14

VCC2

— Output circuit power-supply pin

2

VREF

O Reference voltage output pin

16

GND

— Ground pin

3

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