3.24W mono Class D in a 9-bump DSBGA — what it delivers
That power level from a 9-bump DSBGA package (roughly 1.5 mm × 1.5 mm) makes it a fit for space-constrained portable speakers, IoT voice modules, and battery-powered alert tones where a full-size audio amp won't fit. The Class D architecture keeps efficiency high enough that a small PCB copper area handles the heat — no separate heatsink needed for typical music signals.
If your design lives inside a sealed enclosure that hits 85°C ambient, the 3.24W output assumes adequate PCB thermal relief — the DSBGA's thermal path is through the solder balls to the board, so a solid ground-plane connection under the package matters.
Integrated protection and shutdown — what it saves you
Differential inputs reject ground noise between the audio source and the amp — useful when the codec or DAC shares a long ground trace. Short-circuit and thermal protection mean the part survives a speaker-wire short or a stalled airflow condition without latching up or burning. The shutdown pin lets a GPIO or power-management IC cut the 24 mA quiescent draw to near zero when audio is idle, which stretches battery life in always-on listening devices.