Caps on the chip with snubberized?

chipco3434 · 9th March 2006, 03:03 AM

I built a snubberized PS for LM3875. Basically a dual bridge 3x4700uF per rail with the snubber stuff at the end. Do I still need the 1000uF caps at the V+ and V- on the chip?

The chip will be used in non-inverted mode.

EDIT---- I did another search/Sorry to waste your time.

Dominick22 · 10th March 2006, 07:38 PM

Chipco, I just think that the right people have not seen you Q yet. Sometimes it takes a few days to get the answer you want. Sometimes I get used to recieving an answer in a few hours, but every once in a while,it takes a few days or even a week.

Anyway, I don't have your answer, but I am very interested in snubbers right now and would really like to see pics of what you have created so that I may begin to builg a visual of what they should look like.

Thanks chipco,
Dominick

Bazukaz · 10th March 2006, 07:57 PM

You may need ~470 uF bypass near the chip , if supply leads are long.If power supply leads are very short,these caps are not strictly necessarry.A 100nF ceramic caps are needed anyway.

Regards,
Lukas.

9th March 2006, 03:03 AM	#1
chipco3434 diyAudio Member Join Date: Feb 2004 Location: Racine, Wisconsin	Caps on the chip with snubberized? I built a snubberized PS for LM3875. Basically a dual bridge 3x4700uF per rail with the snubber stuff at the end. Do I still need the 1000uF caps at the V+ and V- on the chip? The chip will be used in non-inverted mode. EDIT---- I did another search/Sorry to waste your time.

10th March 2006, 07:38 PM	#2
Dominick22 diyAudio Member Join Date: Aug 2005	Chipco, I just think that the right people have not seen you Q yet. Sometimes it takes a few days to get the answer you want. Sometimes I get used to recieving an answer in a few hours, but every once in a while,it takes a few days or even a week. Anyway, I don't have your answer, but I am very interested in snubbers right now and would really like to see pics of what you have created so that I may begin to builg a visual of what they should look like. Thanks chipco, Dominick __________________ A real amateur enthusiast!

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10th March 2006, 07:57 PM	#3
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	You may need ~470 uF bypass near the chip , if supply leads are long.If power supply leads are very short,these caps are not strictly necessarry.A 100nF ceramic caps are needed anyway. Regards, Lukas.

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