KA3S0765RF Ver la hoja de datos (PDF) - Fairchild Semiconductor

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Fabricante

KA3S0765RF

Fairchild Power Switch(SPS)

Fairchild Semiconductor 

KA3S0765R/KA3S0765RF

Fairchild Power Switch(SPS)

www.fairchildsemi.com

Features

• Wide operatimg frequency range up to (150kHz)

• Pulse by pulse over current limiting

• Over load protection

• Over voltage protecton (Min. 23V)

• Internal thermal shutdown function

• Under voltage lockout

• Internal high voltage sense FET

• External sync terminal

• Auto Restart Mode

Description

The SPS product family is specially designed for an offline

SMPS with minimal external components. The SPS consist

of high voltage power SenseFET and current mode PWM

IC. Included control IC features a trimmed oscillator, under

voltage lock-out, leading edge blanking, optimized gate turn-

on/turn-off driver, thermal shut down protection, over volt-

age protection, temperature compensated precision current

sources for loop compensation and fault protection circuit.

Compared to discrete MOSFET and controller or RCC

switching converter solution, a SPS can reduce total compo-

nent count, design size, weight and at the same time increase

& efficiency, productivity, and system reliabilit. It has a

basic platform well suited for cost-effective C-TV power

supply.

TO-3P-5L

TO-3PF-5L

Internal Block Diagram

1

1

1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync

#3 VCC

#5 Sync

#4 FB

32V

−

5V

+

6.4V

2µA 1mA 2.5R

9V 1R

+

5V

Internal

Vref

bias

Good

logic

OSC

−

+

S

Q

R

L.E.B

0.1V

7.5V −

+

Thermal S/D

S

Q

R

25V −

OVER VOLTAGE S/D

Power on reset

SFET

#1 DRAIN

#2 GND

©2001 Fairchild Semiconductor Corporation

Rev.1.0.1

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