KA7577D Просмотр технического описания (PDF) - Fairchild Semiconductor

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KA7577D

SMPS controller

Fairchild Semiconductor 

KA7577

SMPS Controller

Features

• Low Stand-By Current

• Pulse by Pulse Current Limiting

• Over Voltage Protection

• Over Current Protection

• Integrated Thermal Shutdown Circuit

• Output Driver Current of ± 2A

• Totem pole Output

Internal Block Diagram

www.fairchildsemi.com

Description

KA7577 is fixed frequency PWM controller and specially

designed for SMPS to get regulated DC voltage from AC

power supply. This integrated circuit has so fast rise and fall

output pulse that it can directly drive power transistor as well

as power MOSFET. This device features high speed and

high sensitive current limiting. Protection circuitry include

current limiting function against short and over current at

secondary side, owing to the integrated timertype-protection

circuit.

16-DIP

1

20-SOP

1

©2000 Fairchild Semiconductor International

Rev. 5.0

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