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This literature is subject to all applicable copyright laws and is not for resale in any manner.www.fairchildsemi.com KA5x02xx-SERIES KA5H0265RC, KA5M0265R, KA5L0265R, KA5H02659RN/KA5M02659RN, KA5H0280R, KA5M0280R Fairchild Power Switch(FPS) Features Description Precision Fixed Operating Frequency (100/67/50kHz) The Fairchild Power Switch(FPS) product family is specially Low Start-up Current (Typ. 100uA) designed for an off-line SMPS with minimal external Pulse by Pulse Current Limiting components. The Fairchild Power Switch(FPS) consist of high Over Load Protection voltage power SenseFET and current mode PWM IC. Included Over Voltage Protection (Min. 25V) PWM controller features integrated fixed oscillator, under Internal Thermal Shutdown Function voltage lock out, leading edge blanking, optimized gate turn-on/ Under Voltage Lockout turn-off driver, thermal shut down protection, over voltage Internal High Voltage Sense FET protection, and temperature compensated precision current Auto-Restart Mode sources for loop compensation and fault protection circuitry- compared to discrete MOSFET and controller or R CC switching converter solution. The Fairchild Power Switch(FPS) can reduce total component count, design size, weight and at the same time increase efficiency, productivity, and system reliability. It has a basic platform well suited for cost-effective design in either a flyback converter or a forward converter. TO-220F-4L 8-DIP TO220-5L 1 1 1 1.6.7.8. Drain 1. Drain 1. GND 2. GND 2. GND 2. Drain 3. Vcc 3. Vcc 3. Vcc 4. FB 4. FB 4. FB 5. NC 5. S/S Internal Block Diagram VCC DRAIN 32V 5V Internal SFET Vref bias Good logic Soft Start * OSC 5V S uA Q R FB L.E.B 2.5R 5 A 1mA + 1R 9V 0.1V + S GND 7.5V Q R + Thermal S/D Power on reset 27V OVER VOLTAGE S/D * KA5H0265RC Rev.1.0.4 2003 Fairchild Semiconductor Corporation