12v psu problem

to: all c-hing,
for the pic. attached, any c-hing know what is the me
aning of 9.輸出端並聯10uF/50V和0.1uF/50V的電容?
thanks
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佢係話個波紋300mV是經過了電容後度出來的數據.

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回復 2# funfunhk
thanks for ur reply.
if i want to reduce the noise, can i use the cap. to do so-輸出端並聯10uF/50V和0.1uF/50V的電容? thx

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回復 3# sunschow


    你要求的波紋要多少?
手頭有材料可以先試一試,
唔work至考慮買過....
用在什麼地方?音響?

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回復 4# funfunhk

for lcd tv, has many snow-flower!

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btw, there has 2 16v 1000uf for output, if replace by 25v 1000 uf, can be better for noise reduction ? thx

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雪花反而睇下輸出線有冇磁環?

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回復 7# funfunhk
aly add 磁環, but still no good.
i aly use a external psu to test, the result is good. therefore, i think the psu have noise for output. thx

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回復  funfunhk
aly add 磁環, but still no good.
i aly use a external psu to test, the result is goo ...
sunschow 發表於 2013-5-30 17:02


If there is noise from PSU, you may consider adding a EMI filter to the PSU input.

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回復 9# ckshum

at the ac input side? thx

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