MB3775(1994) 查看數據表（PDF） - Fujitsu

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MB3775
(Rev.:1994)

Switching Regulator Controller

Fujitsu 

MB3817

s BLOCK DIAGRAM

FB

5

−IN

4

+IN 3

DTC

6

CS

13

Error

− Amp.

+

PWM

Comp.

CS

1µ

Q1

Soft Start

− Comp.

+

SCP

− Comp.

+

OUT

CB1

7

8

CB2

OFF current

setting

block

9

VCC

Q4

10

OUT

Q6

D1

11

Q5

(0.5 V)

VE

(0.9 V)

1.5 V

SCP

OSC

−1.4 V

−1.0 V

bias

RS

Latch

UVLO

1µ

bias

VCC

Q2 Q3 Ref Power 15

(1.5 V) ON/OFF

CTL

12

CT RT

14 16

12

CSCP VREF GND

4

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