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Old 19th January 2014, 09:32 AM   #1
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Default Cap selection

Sorry if this is the wrong section. I am looking to upgrade the caps in the power supply se tion on my car audio sound processor. Tbe picture is below. The stock caps are jamicon tk The 3 larger caps are 1000uf 16v and the two smaller are 470uf 25v. Any advice is appreciated.


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Old 19th January 2014, 10:26 AM   #2
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Additionally in the audio path there is a bunch of smd caps. 4mm in size. Some are 22uf 16v and some are 10uf 16v. Any suggestions for them as well?
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Old 19th January 2014, 11:17 AM   #3
ishiru is offline ishiru  Indonesia
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blackgates maybe?

there's a bucnh of good caps.BHC Aerovox, Panasonic FC, Nichicon Gold Tune, Sanyo OsCon, etc..

i usually use panasonic fc sInce they're low esr type and cheap enough

bypass them w/ some MKPs if you want..

for audio path, you might want to use oscon, silmic, cerafine, etc.for a smaller one like 1uF, or several nF i prefer MKPs or oils..

Last edited by ishiru; 19th January 2014 at 11:20 AM.
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Old 19th January 2014, 11:20 AM   #4
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Cost is no option. Just need low esr. I want blackgate fk but they are too big.
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Old 19th January 2014, 11:24 AM   #5
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For the main caps the max diameter is 10mm. Yeah i know, that sucks. It is a small board.
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Old 19th January 2014, 12:04 PM   #6
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I take it the top 4 caps are the bypass caps?
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Old 19th January 2014, 12:11 PM   #7
AndrewT is offline AndrewT  Scotland
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The chip should all have local HF decoupling to each chip's power pins.
Groups of chips should all have nearly local MF decoupling to the chips supply rail/s.

Once that is attended to thoroughly, the PSU capacitors have little to do. They just recharge the HF and MF decoupling and supply the slower changing currents.
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Last edited by AndrewT; 19th January 2014 at 12:25 PM.
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