Using an SMPS with Audiosector kit

alleycat · 7th February 2007, 10:49 AM

I've just bought a switchmode power supply which I intend to use with an Audiosector LM3875 kit.
I was wondering if the 1500uF capacitors are still necessary?

Dxvideo · 7th February 2007, 02:31 PM

I use two MeanWell 24v 4,5A SMPS (which is switching frequency=25Khz) modules for my LM3886 stereo board. On the PCB i have 1000µF+10µF+100nF on each rail. And i cannot hear any kind of noise.
Some of DIYers said "SMPS using needs extra filter solutions" in past but i guess its unnecessary..

alleycat · 9th February 2007, 10:55 AM

Thanks for the reply. I would have expected that an SMPS would need minimal filtering, given the specs I've seen. I'll be using a supply with a switching frequency in the hundreds of kHz range.

7th February 2007, 10:49 AM	#1
alleycat diyAudio Member Join Date: May 2005 Location: Melbourne	Using an SMPS with Audiosector kit I've just bought a switchmode power supply which I intend to use with an Audiosector LM3875 kit. I was wondering if the 1500uF capacitors are still necessary?

7th February 2007, 02:31 PM	#2
Dxvideo diyAudio Member Join Date: Nov 2003 Location: Turkey	I use two MeanWell 24v 4,5A SMPS (which is switching frequency=25Khz) modules for my LM3886 stereo board. On the PCB i have 1000µF+10µF+100nF on each rail. And i cannot hear any kind of noise. Some of DIYers said "SMPS using needs extra filter solutions" in past but i guess its unnecessary.. __________________ Best regards, Ozgur

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9th February 2007, 10:55 AM	#3
alleycat diyAudio Member Join Date: May 2005 Location: Melbourne	Thanks for the reply. I would have expected that an SMPS would need minimal filtering, given the specs I've seen. I'll be using a supply with a switching frequency in the hundreds of kHz range.

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