TPA3131D2

The TPA3131D2 from Texas Instruments is an active, analog input Class-D audio amplifier designed for various audio applications. It supports stereo configurations and can deliver up to 25W of output power into an 8-ohm load at 19V supply, or 4W stereo into an 8-ohm load at 7.4V supply.

This amplifier operates within a wide power stage supply voltage range of 4.5V to 26V, making it versatile for different power requirements. It features high power efficiency, exceeding 90%, combined with low idle loss, potentially enabling heat-sink-free operation. The device includes advanced modulation schemes and multiple switching frequencies, including AM avoidance, and supports master and slave synchronization up to 1.2 MHz.

Designed with a feedback power stage architecture, the TPA3131D2 offers high PSRR, reducing power supply requirements. It supports both differential and single-ended inputs and can operate in stereo or mono modes. Integrated self-protection circuits include overvoltage, undervoltage, overtemperature, DC-detect, and short circuit protection with error reporting.

The TPA3131D2 is housed in a 32-pin VQFN thermally enhanced package measuring 5 mm x 5 mm. It is rated for an operating temperature range of -40°C to 85°C ambient temperature. The device is suitable for applications requiring efficient, high-quality audio amplification.