SMPS Power Switch(QRC), 0.5A, 650V, 8DIP/8LSOP (Green)

A Valley Switching Converter FSQ321 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.
By Fairchild Semiconductor
FSQ321 's PackagesFSQ321 's pdf datasheet
FSQ321L SOP




FSQ321 Pinout, Pinouts
FSQ321 pinout,Pin out
This is one package pinout of FSQ321,If you need more pinouts please download FSQ321's pdf datasheet.

FSQ321 Application circuits
FSQ321 circuits
This is one application circuit of FSQ321,If you need more circuits,please download FSQ321's pdf datasheet.


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