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Electronics => Projects, Designs, and Technical Stuff => Topic started by: China NewBoy on November 03, 2019, 11:56:06 am

Title: A problem about my switch mode Power supply
Post by: China NewBoy on November 03, 2019, 11:56:06 am

 i made a 24V switch mode power and it is suppoed to output the current of 2A ,but ,after i did some experiments,i found the Volt drop down to 22V when the LOAD is 12ohm. (there is weird sound -ZiZi)  (pdf 's  left upon part is the power supply unit) ,i think the circuit around OPA or tl431 is the key ,however, i just cant adjust it properly.

my SchDoc Pdf
my PCB Doc

 hope the problem solved :-+

Title: Re: A problem about my switch mode Power supply
Post by: Simon on November 03, 2019, 01:49:44 pm

If you start another topic twice you will be banned! i hope that is clear enough for you.