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FA5301BP

Bipolar IC For Switching Power Supply Control

Fuji Electric 

FFAA53051B3P(0N)1BP(N)

s Description

The FA5301BP(N) is a bipolar IC containing basic circuits

necessary for PWM-type switching power supply control.

This IC switches an external transistor according to external

synchronizing pulses.

s Features

• External synchronization input terminal

• Wide supply voltage range (VCC =7 to 22V)

• Open-collector output

• Soft-start from standby mode

• Double protection of output transistor by overcurrent limiting

and cutoff functions

• Output ON/OFF control function

• Not many external discrete components needed

s Applications

• Switching power supply for general equipment

(Optimum for TV, display, and other monitor devices)

Bipolar IC

For Switching Power Supply Control

s Dimensions, mm

SOP-16

16

9

1

8

9.9±0.1

0.42±0.07

DIP-16

16

1.27±0.2

9

0.33

0.65

1

19.4

8

0.81

1.5

s Block diagram

2.54±0.25

0.5±0.1

7.6

0~15˚

0.3+–00.1.05

0~15˚

Pin Pin

No. symbol

Description

1 IN (–) Inverting input to error amplifier

2 IN (+) Non-inverting input to error

amplifier

3 ER.OUT Error amplifier output

4 FB

Feedback input

5 IS

Overcurrent detection

6 CD

Overcurrent cutoff delay

capacitor

7 GND

Ground

8 ON/OFF Output ON/OFF control

9 OUT

Output

10 DT

Dead time adjustment

11 CT

Oscillator timing capacitor

12 CSY

External synchronizing signal

detection capacitor

13 SYNC External synchronization input

14 CSO

PWM soft-start capacitor

15 REF

Reference voltage output (5V)

16 VCC

Power supply

1

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