Q0765R PDF – Fairchild Power Switch ( FSQ0765R, QO765R )

Part Number: Q0765R, FSQ0765R

Function: Green-Mode Fairchild Power Switch

Package: TO-220 Type

Manufacturer: Fairchild Semiconductor

Images:Q0765R pdf switch



This is Green-Mode Fairchild Power Switch.

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), LeadingEdge Blanking (LEB), optimized gate driver, internal softstart, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry.


1. Optimized for Quasi-Resonant Converter (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

6. Simple Scheme for Sync Voltage Detection


Q0765R pinout

Key features commonly associated with Green-Mode Fairchild Power Switches may include:

1. Integrated Power MOSFET: The IC integrates a power MOSFET for efficient switching operation, eliminating the need for external discrete components.

2. Advanced Protection Mechanisms: These power switches often include built-in protections such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown protection to ensure safe operation and prevent damage to the system.

3. Green-Mode Control: The “Green-Mode” designation typically indicates that the IC incorporates energy-saving features, such as pulse-frequency modulation (PFM) or burst mode operation, to optimize power consumption during light load conditions or standby mode.

4. Wide Input Voltage Range: Fairchild’s Green-Mode Power Switches are designed to accommodate a broad range of input voltages, making them suitable for various applications.

5. Simplified Design: These ICs often provide integrated features that simplify system design and reduce external component count, resulting in compact and cost-effective solutions.


1. Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder

Q0765R PDF Datasheet

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