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25 Watt per Channel Digital Input Stereo Amplifier Card

This is a two channel (stereo) audio amplifier built around the TAS5715 chip that takes a I2S digital input and puts out up to 25 Watts of audio per channel. It is configured over a I2C (TWI) serial connection. An ATtiny84 allows for automatic configuration of the amplifier on power-up. The card is 40mm by 89mm and uses a PCI Express style card edge connector to plug into a host board.

Bare circuit board for solder stencil testBare PCB for solder stencil test. A single solder bridge across two of the pads for the amplifier IC.

Circuit board with componentsFirst attempt at placing and reflow soldering the components onto the circuit board. A solder bridge between two pins delayed testing.