700 mW mono Class AB — what the output power rating tells you
That 700 mW figure is the maximum output power per channel at 10% THD into 8 Ω — enough to drive a small speaker in a portable radio, intercom, or alarm panel. The supply range means it runs directly from a single lithium cell (3.6 V nominal) or a 5 V rail without a separate audio regulator.
The 8-HVSSOP package includes an exposed thermal pad; without a proper via-stitched copper pour on the PCB, the junction temperature will exceed the limit at full output in a warm enclosure. A heatsink is not required if the board provides at least 1 square inch of 1-oz copper on the pad's layer — but that copper area is the heatsink.
Protection features save board space
Integrated short-circuit protection, thermal shutdown, and a shutdown pin let you omit external protection diodes or a supervisor IC. The thermal shutdown kicks in at approximately 150°C junction, which protects against a sustained output short but also means the thermal pad design must be adequate — otherwise the part will cycle in and out of shutdown during normal high-volume playback.