FA3641 데이터 시트보기 (PDF) - Fuji Electric

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FA3641

PWM control IC with light load power saving function For Switching Power Supply Control

Fuji Electric 

s Block diagram

FA3641

FA3647

FA3641P(N), FA3647P(N)

Pin No. Symbol Function

Description

1

RT

Oscillator timing Setting oscillation frequency

resistor

2

FB

Feedback

Input to PWM comparator

3

IS (+)/ Overcurrent

Input to overcurrent limiting

IS (–) detection

function

4

GND Ground

Ground

5

OUT Output

Output for direct driving a

power MOSFET

6

VCC Power supply

Power supply for IC

7

REF Reference voltage Reference voltage output

(5V)

8

CS

Soft-start and

Soft-start, ON/OFF and latch-

ON/OFF control mode shutdown operations

s Absolute maximum ratings (Ta=25˚C)

Item

Supply voltage

Output peak current

FB pin input voltage

REF pin output current

IS pin input voltage

CS pin input current

Total power dissipation

Operating temperature

Junction temperature

Storage temperature

Symbol

VCC1

VCC2

IOL

IOH

VFB

IREF

VIS

ICS

Pd

Topr

Tj

Tstg

Test condition

Low impedance source (Icc >15mA)

Internal ZD clamp (Icc < 15mA)

Sink current

Source current

at Ta =25˚C

DIP

SOP

Rating

30

Self limiting

+1.0

–0.5

–0.3 to 5.0

–10

–0.3 to 5.0

2.0

800 *1

400 *2

–30 to +85

125

–40 to +150

Unit

V

V

A

A

V

mA

V

mA

mW

˚C

˚C

˚C

Note: *1 Derating factor Ta > 25˚C: 8.0mW/˚C

*2 Derating factor Ta > 25˚C: 4.0mW/˚C

Maximum power dissipation curve

400mW (SOP)

800mW (DIP)

0

–30

25

85

125

Ambient temperature Ta [˚C]

59

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