Work in progress: 400W fully digital class D amplifier with DSP
"Think Digital, not analog" 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 the previous design and explains many of the reasons behind my design choices. So far, I have gone through 4 Revs for this project: - Rev 1 (previous PCB) - non-functional 8/26/2025 - Rev 2 (Partially functioning PCB) - December 2025 - Rev 2.5 (small board to verify layout and schematic of TAS5830) - finished 1/11/2026 - Rev 3 (Final PCB) - finished 1/25/2026 Compared to my previous design (rev 1), the changes are as follows: Output + DAC: Instead of using a PCM5242 + TPA3255, I replaced it with a single TAS5830 IC. This takes in a digital I2S input. I love this chip for many reasons: - Simplicity: (It's a DAC, Amp power stage, DSP, and digital logic, all in one IC). No external circuit for power-on/off pop prevention (Update: there is a slight tick when the amps are turned on , but i...
