The TAS2553 is a high efficiency Class-D audio power amplifier with advanced battery current management and an integrated Class-G boost converter. The device constantly measures the current and voltage across the load and provides a digital stream of this information. The Class-G boost converter generates the Class-D amplifier supply rail. During low Class-D output power, the boost improves efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When high power audio is required, the boost quickly activates to provide significantly louder audio than a stand-alone amplifier connected directly to the battery. The AGC automatically adjusts Class-D gain to reduce battery current at end-of-charge voltages, preventing output clipping, distortion and early system shutdown. The fixed gain is adjustable via I2C. The gain range is 7 dB to +24 dB in 1 dB steps. In addition to a differential mono analog input, the TAS2553 has built-in a 16-bit D/A converter used with a digital input. Moving the D/A converter from the digital host processor into the integrated amplifier process provides better dynamic performance at lower system cost. Additionally, since the PCB routing is digital rather than analog, sensitivity to external perturbations such as GSM frame-rate noise is decreased at the system level.
Never have an aliasing frequency with this TAS2553YFFT class D amplifier from Texas Instruments. It has a differential input signal and a differential output signal. It has a maximum load resistance of 8 Ohm. It has a minimum dual supply voltage of 1.5|1.65|3 V and maximum of 1.95|3.6|5.5 V. It has a 1-channel mono output. This audio amplifier has a minimum operating temperature of -40 °C and a maximum of 85 °C. This device uses three power supplies.