Inductor-free stereo analog input class-D audio amplifier

The Texas Instruments TPA3138D2 is a 10W/ch, high-efficiency, low-idle-current Class-D stereo audio amplifier. It can drive stereo speakers with a load as low as 3.2Ohm. In the 1SPW mode, it consumes a low idle current of only 21mA (12V) and can operate down to 3.5V, enabling a longer audio play and enhanced thermal performance in battery-powered appliances, Bluetooth speakers and other power-sensitive applications. Advanced EMI Suppression with Spread Spectrum Control allows the use of economical ferrite bead filters while adhering to EMC requirements for system cost reduction. To simplify the design even further, the device combines essential protection features including overvoltage, undervoltage, power limit, short circuit, overtemperature, as well as DC speaker protection. All of these protections come with automatic recovery.