The Fairchild Power Switch (FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch (FPS) consist of high voltage power SenseFET and current mode PWM IC. Included PWM controller features integrated fixed oscillator, under voltage lock out, leading edge blanking, optimized gate turn-on/turn-off driver, thermal shut down protection, over voltage protection, and temperature compensated precision current sources for loop compensation and fault protection circuitry. Compared to discrete MOSFET and controller or R_CC switching converter solution, a 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.

• Precision fixed operating frequency (100/67/50KHz)
• Low startup current (typ. 100µA)
• Pulse by pulse current limiting
• Over load protection
• Over voltage protecton (Min. 25V)
• Internal thermal shutdown function
• Under voltage lockout
• Internal high voltage sense FET
• Auto-restart mode