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TOP单端反激设计范例 发电源资料(反激篇)

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TOP单端反激设计范例 发电源资料(反激篇)

This document is an engineering report that describes a universal input power supply that utilises a TOP249Y. This supply is an off-line flyback converter that operates in continuousmode.Belowisalistofnotablefeatures:

 • Verycompactdesign:(4.1”×2.25”×1.06”internalboxdimensions)

 • Highpowerdensity-7W/inch³

 • Fulloutputpowerinsealedenclosureat40°Cambient 

• Highefficiency:84%(85VAC),89%(230VAC) 

• Lowno-loadconsumption:350mW(115VAC),500mW(230VAC)

 • Lowvalueinputcapacitor:extendedmaximumdutycycleallows2µF/W

 • Powerlimitedduringoverload:overloadoutputcurrent<5Aat19V 

• Primarysidesoft-start:minimizescomponentstressesduringstart-up

 • LowEMIduetofrequencyjittering:meetsCISPR22B/EN55022Bwith outputearthed 

• Lineundervoltagesense:nooutputglitchesonpoweruporpowerdown

 • Lineovervoltageshutdown:extendedlinesurgeprotection

 • Hystereticthermalshutdown:supplyautomaticallyrecoverswhenfaultis removed

 • Lowcomponentcount:simplecircuitanddesign

 • SinglesidedPCboard:noplatedthroughholes

 • Nosurfacemountcomponentsrequired

部分文件列表

文件名 大小
TOP单端反激设计范例.pdf 1M

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