KA5L0365RN

www.fairchildsemi.com

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KA5x0365RN-SERIES
KA5M0365RN, KA5L0365RN Fairchild Power Switch(FPS)
Features
Precision Fixed Operating Frequency (67/50kHz) Low Start-up Current(Typ. 100uA) Pulse by Pulse Current Limiting Over Current Protection Over Voltage Protection (Min. 25V) Internal Thermal Shutdown Function Under Voltage Lockout Internal High Voltage Sense FET Auto-Restart Mode

Description
The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consists of a high voltage power SenseFET and a current mode PWM IC. Included PWM controller integrates the fixed frequency oscillator, the under voltage lock-out, the leading edge blanking, the optimized gate turn-on/turn-off driver, the thermal shutdown protection, the over voltage protection, and the temperature compensated precision current sources for the loop compensation and the fault protection circuitry. Compared to a discrete MOSFET and a PWM controller or an RCCsolution, a Fairchild Power Switch(FPS) can reduce the total component count, design size and weight and at the same time increase efficiency, productivity, and system reliability. It has a basic platform well suited for the cost effective design in either a flyback converter or a forward converter
8-DIP

Applications
SMPS for VCR, SVR, STB, DVD DVCD SMPS for Printer, Facsimile Scanner Adaptor for Camcorder

1.6.7.8 Drain 2.GND 3.Vcc 4.FB 5.NC

Internal Block Diagram
3 VCC
32V 5V Vref Good logic OSC 9V 5 A 1mA 2.5R 1R 7.5V - 27V - Thermal S/D OVER VOLTAGE S/D - S R L.E.B 0.1V S R Q Q Internal bias SFET

1,6,7,8 DRAIN

4 FB

2 GND

Power on reset

Rev.1.0.6
2003 Fairchild Semiconductor Corporation