a dc to dc converter problem

[wei9321]

when the converter no load,
it's output voltage can not steady
but afther adding the mini load
the output voltage is stable
and the temperature rise,
the ouout voltage rise fast
why?

 

[TekUT]

Could you write some others details about the converter e.g. topology (Buck, Boost, ...), feedback type (voltage mode, current mode, ...), functioning mode (CCM, DCM, ...), voltage on input/output and so on...
Do you've some circuit schematic?

Bye

 

[eem2am]

no_load can be problematic, but it neednt be............

some of the old power ICs couldnt deal with it cuzz they always came on every cycle

but newer ones do skip cycle etc etc and can handle it easy

im surprised yo are having this problem

 

[wei9321]

Could you write some others details about the converter e.g. topology (Buck, Boost, ...), feedback type (voltage mode, current mode, ...), functioning mode (CCM, DCM, ...), voltage on input/output and so on...
Do you've some circuit schematic?

Bye

topology:flyback
feedback type:current mode
functioning mode:CCM
input:18-75v
output:5v/2A

 

[TekUT]

Do you've also a schematic?

Bye