Fairchild FSGM0565离线电源设计方案
Fairchild 公司的FSGM0565是集成了SenseFET的PWM控制器,特别设计用于离线开关电源(SMPS),最大限度降低外接元件数量. PWM控制器包括固定频率振荡器,UVLO, 前沿消隐(LEB),优化栅极驱动器,软起动,用于回路补偿的温度补偿精密电流源,以及自保护低矮路.内部的高压SenseFET可达650V,主要用在LCD TV和监视器,STB和DVD的电源.本文介绍FSGM0565主要特性,方框图, PWM电路图,典型应用电路, 演示板电路图和所用材料清单(BOM).
Fairchild Semiconductor’s Power Switch Improves Off-Line Power Supply Designs
The FSGM0565R is an integrated Pulse Width Modulation (PWM) controller and SenseFET specifically designed for offline Switch-Mode Power Supplies (SMPS) with minimal external components. 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 loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSGM series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform suited for cost-effective design of a flyback converter.
FSGM0565主要特性:
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