Class D stereo amp in a 48-HTQFP — what you're getting
The Texas Instruments TAS5719PHPR is a Class D stereo audio amplifier delivering 15W per channel into an 8Ω load. The 48-HTQFP (7x7 mm) package with exposed thermal pad is the standard power-QFP footprint for this power class.
Package and mounting
Rated at 15W per channel into 8Ω, this part drives typical bookshelf or satellite speakers in a stereo pair. The Class D switching topology keeps efficiency high — expect less than 10W dissipation at full output, which the exposed pad on the 48-HTQFP can handle with a decent via-stitch to the ground plane. If your load drops to 4Ω, the output current limit will reduce power; stay with 8Ω for the rated figure.
Supply rail and control interface
I²C control handles volume, mute, and shutdown, plus the depop feature that suppresses turn-on thump. Differential inputs reject ground noise on long signal runs, which matters for board-level routing.
Fine for home audio, AV receivers, soundbars, and pro-audio gear that stays indoors. Not rated for automotive cabin or outdoor enclosures where the ambient swings below freezing.
Rework note on the 48-HTQFP
The 48-HTQFP (7x7 mm) has a 0.5 mm pitch — fine for hand rework with a hot-air station if you preheat the board. The exposed thermal pad under the package needs a good solder joint to the ground plane; a missing or cold pad joint will let the thermal protection trip early.