Mono audio amp in a 0.4mm-pitch BGA
The TAS2553YFFT is a mono Class D and Class G audio amplifier from Texas Instruments, delivering 2.8 W into an 8 Ω load from a 1.65 V to 1.95 V supply rail. The dual-class architecture lets it switch between Class G (for efficiency at low output levels) and Class D (for higher power), which matters for battery-powered portable audio where every milliwatt of quiescent draw counts against the charge budget. Packaged in a 30-ball DSBGA (0.4 mm pitch), the die sits directly under the balls — no mold compound overhang — so the board footprint is the package outline. The 30-DSBGA lands on a 0.4 mm pitch land pattern; the center balls carry the power and ground return, which keeps the loop inductance low for the switching output stage.
Supply and temperature envelope
Output power is specified as 2.8 W into 8 Ω at 10% THD+N — the actual clean output at 1% THD will be lower, typically around 2.2 W for this class of device. The 1-channel mono output suits single-speaker applications: portable Bluetooth speakers, sound bars with a single full-range driver, or earpiece amplifiers in feature phones.
Protection and compliance
On-chip short-circuit and thermal protection shut down the output stage before the die temperature exceeds the silicon limit — no external clamp diode or current-sense resistor needed. The protection latches off and requires a supply cycle to reset, which is standard for this amplifier class.