Fairchild FSQ510 RD-267 4.2W电源参考设计

Fairchild 公司的FSQ510是用于谷底开关转换器,具有低EMI和高效率, 内部集成了700V的LDMOS功率开关,内置的软起动时间为5ms,主要用在LCD TV, LCD监视器,PC和白色家电的辅助电源.本文介绍FSQ510主要特性,方框图,典型应用电路以及采用FSQ510的RD-267 4.2W电源参考设计的电路和所用变压器的主要特性和电路.

FSQ510, FSQ510H, and FSQ510M:Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter – Low EMI and High Efficiency

A Valley Switching Converter (VSC) generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ510 (H or M) is an integrated valley switching pulse width modulation (VSPWM) controller and SenseFET specifically designed for offline switch-mode power supplies (SMPS) for valley switching with minimal external components. The VS-PWM controller includes an integrated oscillator, under-voltage lockout (UVLO), leading-edge blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry.
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