Product Summary

The 3S1265R is a Power Switch specially designed for an off line SMPS with minimal external components. The Fairchild Power Switch(FPS) consists 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 voltage protection, temperature compensated precision current sources for loop compensation and fault protection circuit. compared to discrete MOSFET and controller or RCC switching converter solution, the 3S1265R can reduce total component count, design size, weight and at the same time increase efficiency, productivity, and system reliability. The 3S1265R has a basic platform well suited for cost-effective C-TV power supply.

Parametrics

3S1265R absolute maximum ratings: (1)Maximum drain voltage, VD,MAX: 650 V; (2)Drain-gate voltage (RGS=1MΩ), VDGR: 650 V; (3)Gate-source (GND) voltage, VGS: ±30 V; (4)Drain current pulsed, IDM: 48.0 ADC; (5)Single pulsed avalanche energy, EAS: 785 mJ; (6)Continuous drain current (TC=25℃), ID: 12 ADC; (7)Continuous drain current (TC=100℃), ID: 8.4 ADC; (8)Maximum supply voltage, VCC,MAX: 30 V; (9)Input voltage range, VFB: -0.3 to VSD V; (10)Total power dissipation, PD: 269 W; (11)Operating ambient temperature, TA: -25 to +85℃; (12)Storage temperature, TSTG: -55 to +150℃.

Features

3S1265R features: (1)Wide operatimg frequency range up to (150kHz); (2)Pulse by pulse over current limiting; (3)Over load protection; (4)Over voltage protecton (Min. 23V); (5)Internal thermal shutdown function; (6)Under voltage lockout; (7)Internal high voltage sense FET; (8)External sync terminal; (9)Auto Restart Mode.

Diagrams

3S1265R internal block diagram