Q0465R Datasheet PDF – 650V Integrated Power Switch

Part Number: Q0465R, QO465R

Function: 650V, Green-Mode Fairchild Power Switch

Package: TO-220-6 Pin Type

Manufacturer: Fairchild Semiconductor

Q0465R datasheet


The Q0465R is Green-Mode Fairchild Power Switch (FPS) for Quasi-Resonant Operation – Low EMI and High Efficiency.

A Quasi-Resonant Converter (QRC) 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 quasi-resonant operation and Alternating Valley Switching (AVS).

The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading- Edge Blanking (LEB), optimized gate driver, internal softstart, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective designs of quasi-resonant switching flyback converters.



1. Optimized for Quasi-Resonant Converters (QRC)

2. Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)

3. High-Efficiency through Minimum Voltage Switching

4. Narrow Frequency Variation Range over Wide Load and Input Voltage Variation

5. Advanced Burst-Mode Operation for Low Standby Power Consumption

Block Diagram

Other data sheets are available within the file:



Q0465R Datasheet PDF Download

Q0465R pdf