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Class D Switching Power Amplifiers and Power D/A conversion

Stereo class d amp!
Stereo class d amp!
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Old 31st May 2014, 03:10 PM   #1
kinter is offline kinter
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Default Stereo class d amp!

hi to all.
i found this schematic on internet

damp update.jpg

and i made a stereo amplifier with the eagle cad

amp1.JPG

this is the pdf file for realize it!
schematic.pdf
Top.pdf
bottom.pdf
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Old 31st May 2014, 04:32 PM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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OK, so how do you stop M1 and M2 switching on together at switch on?
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Old 31st May 2014, 04:37 PM   #3
kinter is offline kinter
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I think the only solution is to use two n-channel mosfet, but the circuit should be modified to use an IR2110 .... this version uses complementary pairs
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Old 2nd June 2014, 08:09 PM   #4
kinter is offline kinter
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some time ago I made this from detex schematic
Class D Amplifier1.jpg

i realized a stereo version in a small pcb only 80x100mm, good quality and power, but i have some little problems at very low frequency...
DSC_0315.jpg

The new version is better in schematic and layout!
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Old 2nd June 2014, 09:41 PM   #5
voltwide is online now voltwide  Ireland
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May be you will never encounter MOSFETs blowing up on power turn on - provided your power supply voltage does not rise too fast.
For that reason these kind of capacitive coupled PMOS/NMOS amps have a bad reputation of easily burning up, beeing more sensitive with higher supply voltage.
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