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Class D Switching Power Amplifiers and Power D/A conversion

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Old 27th December 2009, 02:45 AM   #1
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Default Feedback around TDA8950

TDA8950 is intended to be open loop operation with fixed gain of 30dB.
What will happen if we put UCD style feedback for target gain of 20dB, meaning only 10dB is reserved for feedback, will it do more harm than merit?
Bruno himself stated that if we want to use feedback, use tons of it, and 10dB is certainly not much.
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Old 27th December 2009, 03:56 AM   #2
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Why don't you tell us once we've tried it and then you can share our results with us.
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Old 27th December 2009, 04:00 AM   #3
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I got another idea, is it possible to use external comparator (like 3116), put UCD loop around it, inject the result to pin 1 of TDA8950 (OSC), not using it's +input and -input.
So TDA 8950 is only for power stage.
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