UCD 25 watts to 1200 watts using 2 mosfets

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Hi sir manoj
good morning every one
this is AUD600 class D amp ver 1.1 from sir manoj
this is not complete yet

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


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thd over the irs 900d?

Hi stewin,

for low THD use MOSFET 70/100nc one gate resistor use recommended the manufacturer

use fsw = 400KHz/450KHz to get smooth sine wave (that will reduce filter size and capacitor value)do not compare with 250KHz range.

for class d start with 80KHz to 500KHz.(new generation MOSFET) for 100KHz use big filter ie. @300uH and big capacitor ie. 30uF/250V to reduce noise and wave shape comparatively good
fsw = 400KHz filter @22uH capacitor 0.47uF/2250V to achieve this you need good PCB, supported MOSFET, good filter and components.

for DIYs start with 125KHz (it is easy) and try with 250KHz switching(not easy)
My design you can go up to 400KHz range

Regards
MANOJ