TI’s tiny Audio Amp

December 2, 2015 | 02:13
The TAS2555 can deliver almost 7W
The TAS2555 can deliver almost 7W
Texas Instruments have introduced a new fully integrated Class-D mono audio amplifier with integrated speaker protection designed primarily for integration into smartphone and tablet designs. The TAS2555 includes speaker voltage and current sensing feedback. A low-latency DSP uses TI’s SmartAmp speaker protection algorithms to maximise loudness while maintaining safe speaker operating conditions. The amplifier can supply up to 6.9 W into a 4 ohm load with a THD+N of 10 % or 5.7 W with a THD+N of 1%.

An integrated class-H power supply boost converter generates the amp’s supply rail. When lower levels of output power are selected the boost converter will be deactivated so that the amp is powered directly from Vbatt to improve efficiency. When higher output levels are selected, the boost activates signal tracking to make the additional voltage available to the load. The digital audio signal uses an I2S interface with a sample rate from 8 kHz to 96 kHz. Internal control registers are accessible via I2C or SPI interface.

The TAS2555 is available in a 3.47 mm × 3.23 mm, 0.5 mm pitch, 42-ball WCSP package.
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