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Class D Switching Power Amplifiers and Power D/A conversion

Full-bridge vs half-bridge Class D amplifier?
Full-bridge vs half-bridge Class D amplifier?
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Old 28th October 2011, 05:02 PM   #11
JensRasmussen is offline JensRasmussen  Denmark
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Originally Posted by eem2am View Post
I would have thought that if you are supplying a Class D amplifier with an SMPS.....then it would be far better to make the Class D amplifier a Full Bridge Class D amplifier?

..because it makes the supplying SMPS much simpler in that it only has a single rail output.

Also, unless the audio power is very very low , a full-bridge class D amplifier is cheaper than a half-bridge class D amplifier.....since with a full-bridge class D, your using the full rail voltage....not just half of it.?
Hi, my 2 cents....

Half bridge amp is easier, but you have to deal with supply pumping > bigger SMPS

Full bridge amp is more tricky but only a single rail is needed and no supply pumping > simpler SMPS

Neither are easy to do as DIY as both requires detailed knowlede regarding the custom designed magnetics required in both cases.

For most DIY projects I would recommend to only design the amp, and not worrie about the SMPS as this involves working with lethal!! voltages.
Stay on the secondary side of a standard SMPS module - they can be sourced from different companies, or simply use a standard 50/60Hz transformer and rectifier.... this works well for most DIY projects!

I wish you the best of luck with your projects.

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