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'150W' 12VDC isolated 25kHz step-up smps for B+
'150W' 12VDC isolated 25kHz step-up smps for B+
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Old 18th October 2017, 02:10 PM   #11
kodabmx is online now kodabmx  Canada
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Especially designing a choke input filter for 60Hz to filter 20kHz. The coil should have been about 50mH. Reality says it's not necessary. However I'm now using a large cap since it's a power amp. 2200uf just because I had one in the junk box.

Last edited by kodabmx; 18th October 2017 at 02:14 PM. Reason: typo
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Old 5th December 2017, 07:49 AM   #12
ErikdeBest is offline ErikdeBest  Switzerland
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'150W' 12VDC isolated 25kHz step-up smps for B+
hi trobbins,

which 10uF did you use (brand, model)? I got some surplus 33uF/350V 125ºC, I will check model and see if I find a datasheet.

Thanks! Erik
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Old 5th December 2017, 08:01 AM   #13
trobbins is offline trobbins  Australia
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Hi Erik, i had some UCC KMG 105C.
Ciao, Tim
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Old 5th December 2017, 10:48 AM   #14
ErikdeBest is offline ErikdeBest  Switzerland
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'150W' 12VDC isolated 25kHz step-up smps for B+
Thank you Tim!
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