MB3788 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB3788

SWITCHING REGULATOR CONTROLLER

Fujitsu 

MB3788

s PIN DESCRIPTION

Pin No.

Pin name I/O

Descriptions

2

OUT1

O Channel 1 push-pull type output

3

VE1

I Channel 1 output current setting

4

Channel 5

1

6

Ca1

Cb1

FB1

— Channel 1 output transistor OFF current setting: Output transistor OFF

— The current is set by connecting a capacitor between pins Ca1 and Cb1.

O Channel 1 error amplifier output

7

-IN1(E)

I Channel 1 error amplifier inversion input

8

+IN1(E)

Channel 1 error amplifier non-inversion input

9

-IN1(C)

I Channel 1 comparator inversion input

16

-IN2(C)

I Channel 2 comparator inversion input

17 +IN2(E)

I Channel 2 error amplifier non-inversion input

18

-IN2(E)

I Channel 2 error amplifier inversion input

Channel 19

2

20

21

FB2

Ca2

Cb2

O Channel 2 error amplifier output

— Channel 2 output transistor OFF current setting: Output transistor OFF

— The current is set by connecting a capacitor between pins Ca2 and Cb2.

22

VE2

I Channel 2 output current setting

23

OUT2

O Channel 2 push-pull type output

13

CTL1

Power and channel 1 control pin

I H level: Power and channel 1 operating

L level: Standby

Control

circuit

14

CTL2

Channel 2 control pin

I

When CTL1 pin = H level,

H level: Channel 2 operating

L level: Channel 2 OFF

15

SCP

— Short-circuit protection circuit capacitor connection

1

VCC2

— Output circuit power pin

Power

circuit

10 -IN(PWM)

I Master oscillating waveform input

11

VCC1

— Reference power and control circuit power

12

VREF

O Reference voltage output

24

GND

— Ground

Note: The alphabetic characters in parenthesis above indicate the following input pins.

(C): Comparator

(E): Error amplifier

3

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