1.4W mono Class AB — output power and supply fit
The MAX9718DEUB+: Rated 1.4W into a 4Ω load from a single channel, this Class AB amplifier delivers enough headroom for a portable speaker or alert tone driver without the crossover distortion of a Class D stage.
Package and thermal management
Without that thermal via array, the 1.4W output into 4Ω will push the junction above the 85°C ambient limit.
On-chip protections and input flexibility
Built-in depop circuitry suppresses the power-on click, differential inputs reject common-mode noise from the audio source, and shutdown mode cuts quiescent draw when the amp is idle. Thermal protection prevents die damage under sustained overload.