英语培训心得体会

1. 低功率方案(<20w ) fairchild p/n: fsez1016/fsez20xx/fan100/sgp400 operation method: psr feature: a> cc/cv control without secondary-feedback circuit (opto， 431...) b> integrated 600v high performance mosfet c> minimize standby power consumer by decreasing pwm frequency linearly d> decrease emi by frequency hopping e> low start-up current， low operation current f> ovp/otp/uvlo function demo reference: 2. 中功率方案 (30—100w) fairchild p/n: fan7527b/fsq0365/fsq0965… operation method: hard switch/qrc feature: a> realize cc/cv control by current detect b> high pf value only using pfc controller without input capacitance c> high efficiency using qrc ic to reduce mosfet consuming d> low operation current e> ocp/ovp/uvlp/short protection demo reference: