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Virtual 4 pole PSU
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Old 3rd July 2006, 04:39 PM   #1
ackcheng is offline ackcheng  Hong Kong
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Default Virtual 4 pole PSU

Anyone can comment on this schematic as power supply filtering as opposed to the conventional way for ClassD amp?

http://www.lcaudio.com/index.php?page=45

Seems like a CRCRC filter in parallel. Any benefit over the traditional CRCRC?
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Old 4th July 2006, 01:26 PM   #2
AndrewT is offline AndrewT  Scotland
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Hi,
that first C will need a good ripple rating to survive continuous loading.
A set of parallel pairs, triples or even quads might be better there.
Again a low value resistor feeding each of the smoothing caps meets the same philosophy as the rest of the circuit.

I would call the example shown a RCRCRC. The first R being the source resistance of the transformer and connecting cables.
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