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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 soft-start, 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.
| FSQ0565RQ Datasheet |
| Product | Product & Eco Status | Unit Price/1K Order | Packing Method Convention | Package Marking Convention* |
|---|---|---|---|---|
| FSQ0565RQLDTU | Obsolete as of 21-Sep-2011 Green as of Jul 2011 Replacement Part: FSGM0565RBLDTU China RoHS | N/A | TO-220F 6L
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4.8 x 10.16 x 15.88mm,
RAIL
| Line 1$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) &K
|
| FSQ0565RQWDTU | Full Production Green as of Jul 2011 China RoHS | $1.352 | TO-220F 6L
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4.7 x 10.16 x 16.07mm,
RAIL
| Line 1$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) &K
Line 2&E (Space) |