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Class D Switching Power Amplifiers and Power D/A conversion

Zero Voltage Switching for Class D amps
Zero Voltage Switching for Class D amps
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Old 6th April 2005, 07:42 PM   #1
hdoggz is offline hdoggz  United States
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Join Date: Jan 2005
Location: VA, USA
Default Zero Voltage Switching for Class D amps

I'm just curious: has anyone ever built a Zero-Voltage-Switching Class D amp? It seems like it should be possible.

the idea behind ZVS is that the voltage across switch(FET, for example) Vds is zero for the duration of the time that it takes for the switch to turn on and off. since this is where most of the power loss occurs, you have a switching amplifier thats practically 100% efficient.

I think the downside is increased cost and complexity. you have to use a couple of extra passive components (caps, diodes). Also, the transfer function probably gets all messed up so feedback loops might be harder to incorporate
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Old 6th April 2005, 08:30 PM   #2
Jaka Racman is offline Jaka Racman  Slovenia
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Join Date: Dec 2002
Location: Slovenia
Hi,

It has been done. It is even not so complicated as you think. Link.

Best regards,

Jaka Racman
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