Work in progress: 400W fully digital class D amplifier with DSP
This is a continuation of the 1000W class D amp design. It may be a good idea to read that article first as this is a highly modified version of that previous design and it describes many of the reasoning behind my design choices. 1000W amp: Why did the project fail? One thing I believe is important is admitting failure. We are all people and we are not all perfect - we make mistakes. I admit that I failed at making the amplifier I wanted to make operational to the way I want it. So the issues are: -No sound from DAC (PCM5242) -Noise from ADC (PCM1802) - fixed (cause is a oscillating AMS1117-5V linear regulator) -Amp output stage not confirmed Working: - PCM2706 (works perfectly) - ASRC works correctly to convert USB sample rate to 48K (DSP native) - ADC (PCM1802 works partially) - fixed now - Bluetooth (QCC5125 works) - ASRC works correctly to convert 44.1K to 48K (DSP native) These are the issues discovered in later test. Here are some flaws in the design: -Use of MCLK line: the...
