Electronics > Projects, Designs, and Technical Stuff

A problem about my switch mode Power supply

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ocset:
your transformer is not phased correctly for it to be a flyback.
(The  dots are in the wrong place)

China NewBoy:
thank you , i knew that my sch have the transformer mistake but my PCB doc is not wrong .....just too lazy to correct the sch

China NewBoy:

--- Quote from: China NewBoy on November 19, 2019, 10:36:20 am ---thank you , i knew that my sch have the transformer mistake but my PCB doc is not wrong .....just too lazy to correct the sch

--- End quote ---
and the problem have been solved ,its c2_cha
 ..... my stupid  mistake, i take a 1uf cap to solder on c2_cha's place.
and it cause the  feedback volt too low

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