This manual describes the MAX98400A evaluation board, which configures the MAX98400A Class‑D audio amplifier to drive a pair of 8 Ω speakers at 2 × 20 W in stereo mode or a single 4 Ω speaker at 1 × 40 W in mono mode. The board operates from an 8 V‑28 V DC supply and provides gain set to +20.1 dB.
The document includes a parts list, schematic diagrams, PCB layout drawings, and detailed instructions for configuring jumpers, connecting power and audio inputs/outputs, and performing functional tests. It also explains how to enable or disable features such as the limiter, thermal fold‑back protection, and mono mode.
| Mono output power | 1 × 40 W into 4 Ω speaker |
|---|---|
| Supply voltage range | 8 V to 28 V DC |
| Maximum supply current | 5 A |
| Gain setting | +20.1 dB |
It operates from an 8 V to 28 V DC power supply.
Short the MONO_1 (or MONO_2) jumper to connect the left and right output pins together.