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Power tip: Weighted feedback in multiple-output supplies

Posted: 30 Apr 2014     Print Version  Bookmark and Share

Keywords:power supply  output voltage regulation  flyback  resistors  control 

[Summary of tips] Many times you are asked to design a multiple output power supply for a minimum cost yet with somewhat stringent output voltage regulation requirements. A good example is the low-power offline flyback shown in figure 1, where both a 3.3- and a 5V output are required.Regulation requirements for this design are ±5% for the 3......
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