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50W隔離型離線式DC.pdf

  • 資源大小:677 K
  • 上傳時(shí)間: 2021-11-24
  • 上傳用戶:kingwide
  • 資源積分:2 下載積分
  • 標(biāo)      簽: 隔離

資 源 簡(jiǎn) 介

ABSTRACT

The flyback power stage is a popular choice for single and multiple output dc-to-dc converters at power

levels of 150 Watts or less. Without the output inductor required in buck derived topologies, such as the

forward or push-pull converter, the component count and cost are reduced. This application note will review

the design procedure for the power stage and control electronics of a flyback converter. In these isolated

converters, the error signal from the secondary still needs to cross the isolation boundary to achieve

regulation. By using the UC3965 Precision Reference with Low Offset Error Amplifier on the secondary

side to drive an optocoupler and the UCC3809 Economy Primary Side Controller on the primary side, a

simple and low cost 50 Watt isolated power supply is realized.


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