KA3511 datasheet(2/28 Pages) FAIRCHILD

부품명	KA3511

상세설명	PC POWER SUPPLY DESIGN WITH KA3511

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제조업체	FAIRCHILD [Fairchild Semiconductor]

홈페이지	http://www.fairchildsemi.com

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2 / 28 page

2

Rev C, November 1999

ORDERING INFORMATION

FEATURES

• Complete PWM control and house keeping circuitry

• Few external components

• Precision voltage reference trimmed to 2%

• Dual output for push-pull operation

• Each output TR for 200mA sink current

• Variable duty cycle by dead time control

• Soft start capability by using dead time control

• Double pulse suppression logic

• Over voltage protection for 3.3V / 5V / 12V

• Under voltage protection for 3.3V / 5V / 12V

• One more external input for various protection (PT)

• Remote on/off control function (PS-ON)

• Latch function controlled by remote and protection input

• Power good signal generator with hysteresis

• 22-Pin dual in-line package

2. BLOCK DIAGRAM

Device

Package

Operating Temperature

KA3511

22 DIP

-25°C ~ 85°C

7

8

OSCILLATOR

2

3

4

19

12

VREF

Start Up

1

9

DELAY

CONTROLLER

17

18

10

20

22

21

5

6

TREM

11

16

13

14

15

PT

V12

V5

V3.3

PG

REM

(PS-ON)

E

C2

C1

REMOTE ON/OFF

1.4V

1.25V

VREF

5V

OVP

COMP

1.25V

UVP

COMP

GND

TUVP

2.2uF

TPG

2.2uF

COMP3

1.8V

0.6V

1.8V

0.6V

PG

GENERATOR

VREF

Ichag

COMP2

COMP1

1.25V

0.1V

DEAD TIME

CONTROLLER

PWM

CONTROL

Q

R

S

CK

DQ

Q

1.25V

INTERNAL

BIAS

5V

DET

VCC

VREF

DEAD TIME

CONTROL

E/A(+)

E/A(-)

V5

V12

COMP

CT

RT

22-DIP-400

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KA3511 데이터시트(PDF) 2 Page - Fairchild Semiconductor

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