What this Class D mono amp delivers — 2.75W into 4Ω
The Texas Instruments TPA2034D1YZFR is a mono Class D audio amplifier in a tiny 9-DSBGA package (NanoFree™ series). It delivers 2.75W continuous into a 4Ω load from a supply between 2.5V and 5.5V — enough to drive a small speaker in a portable speaker, docking station, or battery-powered IoT gadget without a heatsink. Class D efficiency means the device stays cool even at full tilt, so you can skip the thermal pad voodoo. Built-in depop circuitry suppresses the pop on startup and shutdown, differential inputs reject common-mode noise from a long cable, and the short-circuit and thermal protection keep the part alive when a speaker wire gets pinched or the enclosure traps heat. Shutdown pin lets a microcontroller kill the amp between audio bursts to save battery.
Package reality — 9-DSBGA, no lab bench required?
The 9-DSBGA (0.4mm pitch ball grid array) is tiny — about 1.2mm x 1.2mm. That saves board area but means you need a decent reflow profile and X-ray inspection to check solder joints. Not a field-swap part; it is a pick-and-place, reflow-once device. If your rework lab has a hot-air station with a fine nozzle, a careful tech can replace it, but do not plan on hand-soldering this one.