Fairchild/ON Semiconductor FSQ0265RL

650V Integrated Power Switch with Valley Switching control for 16Watt offline flyback converters
POWER SWITCH SMPS GREEN, SMD, LSOP8; Power Supply Type:SMPS; Max Output Current:1.2A; Voltage, Output Max:700V; No. of Outputs:1; Power Dissipation:1.5W; Frequency:55.6kHz; Voltage, Supply Max:20V; Termination Type:SMD; Case Style:LSOP; No. of Pins:8; Operating Temperature Range:-25°C to 85°C; Temp, Op. Max:85°C; Temp, Op. Min:-25°C; Base Number:265; Enc Power Output @ 230VAC:14W; Enc Power Output @ 85-265VAC:11W; Power, Output of @ 230VAC:20W; Power, Output of @ 85-265VAC:16W; Resistance, Rds On:5ohm; Voltage, Output:700V; Voltage, Vcc:15V
A Valley Switching Converter generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for valley switching operation with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout, Leading Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry. Compared with discrete MOSFET and PWM controller solutions, the FSQ-series reduces total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of valley switching fly-back converters.