Class D stereo amp — 12 W per channel into 8 Ω
The MAX98400BETG+T is a 2-channel (stereo) Class D audio amplifier delivering 12 W per channel into an 8 Ω load from an 8 V to 28 V supply rail. The Class D switching topology means the output stage operates in saturation — conduction losses are low, and the efficiency advantage over a linear Class AB amp is substantial at moderate to high output levels, reducing heatsink requirements in compact enclosures. The 8 V to 28 V supply range covers common audio rails from a single 12 V automotive battery up to a 24 V industrial bus, so the same BOM position can serve multiple platform voltage variants without a regulator change. Integrated features include differential inputs for common-mode noise rejection on long input traces, depop circuitry to suppress turn-on/turn-off clicks, and short-circuit and thermal protection that latch the output off rather than letting the die self-destruct under a sustained fault.
Industrial temp range and compact 24-TQFN package
Housed in a 24-TQFN (4x4 mm) exposed-pad package (supplier device package 24-TQFN), the part occupies roughly 16 mm² of board area.
No additional compliance documentation (REACH, UL, IEC) is listed in the available record; the ROHS3 declaration is the confirmed regulatory signal.