TPA3116 Bluetooth Digital Amplifier Board v2.0

The power amplifier chip is TPA3116D2DAD, dual-channel 100W x 2, featuring power-on/off anti-pop sound, previous and next track control buttons, infrared remote control, Bluetooth audio and aux input functions, and
a power supply range of 9-25V.
The op-amp and Bluetooth power supply use a more energy-efficient step-down module instead of a regulator module like the 7805,
because the op-amp and Bluetooth have higher power requirements. I specifically added two 100uf "Green Wave Electric Dragon" audio input capacitors. I used "audiophile-grade" solid-state capacitors (not really).
Since the budget was relatively ample, I also added several filter capacitors to the chip area (100nF x 3, 1uf x 2, 1nF... ). x4)
The entire device uses two 2200uf, 35V high-frequency low-impedance capacitors (I bought the wrong package again, but it should be fine if all materials are ordered from LCSC).
Bluetooth module, buck module, and heatsink purchase links (Taobao and Pinduoduo): http://xa9.top:7777/webftp/web/TPA3116-bt-v2.0/module.html
Finally, a friendly reminder: A 24V circuit absolutely MUST have a cooling fan! Otherwise, the inductor will get hotter than the chip!