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treez
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http://www.irf.com/technical-info/appnotes/an-1071.pdf
The above web doc on page 12 shows how “bus pumping” is unavoidable with half-bridge class D audio amplifiers. The Gain of a class D amp is proportional to the bus voltage, so therefore bus pumping is not good.
Why does anybody ever do a half bridge class D when a full-bridge class D avoids the problem, for the mere price of two more FETs.?
Also, Page 13 shows how class D amplifiers have a big EMC problem…..a class D amplifier suffers from high noise due to the top fet turning on when the bottom fet is reverse recovering its diode (and vice versa). Is there any way to avoid this in a class D amplifier?
The above web doc on page 12 shows how “bus pumping” is unavoidable with half-bridge class D audio amplifiers. The Gain of a class D amp is proportional to the bus voltage, so therefore bus pumping is not good.
Why does anybody ever do a half bridge class D when a full-bridge class D avoids the problem, for the mere price of two more FETs.?
Also, Page 13 shows how class D amplifiers have a big EMC problem…..a class D amplifier suffers from high noise due to the top fet turning on when the bottom fet is reverse recovering its diode (and vice versa). Is there any way to avoid this in a class D amplifier?