亚洲激情一区二区-久操视频免费-秋霞成人av-中文字幕 国产-99在线视频精品-日韩在线视屏-久久国产精品视频-久久久久久逼-日韩精品免费观看-日本黄色网络-www.色中色-午夜日韩欧美-香港台湾经典三级a视频-国产又粗又猛又爽又黄的视频一-久久影院午夜伦手机不四虎卡-米仓穗香在线观看-黄网www

This application note describes a relatively novel and simple way to produce an off-line, power factor corrected 15 Vdc and higher output power supply using an isolated, single stage conversion topology. The power topology is essentially a buck-boost derived flyback converter operating in continuous conduction mode (CCM) and utilizing ON Semiconductor’s NCP1652A controller which was designed specifically for this implementation. The power supply described in this application note is a 48 Vdc, 2 A supply with universal AC input and is intended for general purpose supplies, telecom distributed power “front-ends” and constant voltage LED drivers such as those used in area lighting and distributed lighting applications such as refrigerator case lighting and cove lighting. Efficiencies approaching 90% were achieved with a power factor exceeding 0.95 for most typical loads. The supply includes overcurrent protection, overvoltage protection, brownout detection, and an input EMI filter.