The TPA3221EVM HD-Audio evaluation module demonstrates the TPA3221 integrated circuit from Texas Instruments. TPA3221 is an ultra-low idle-loss Class-D amp which keeps your system cooler and your battery playing longer while supporting 100kHz high resolution audio and features single-rail power supply support, gain settings, mute, and integrated protection.

TPA3251 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary highspeed gate driver error correction (PurePath™ UltraHD). This technology allows ultra low distortion across the audio band and superior audio quality.

The TAS6422Q1EVM showcases the first true 2.1Mhz 2-Ch Digital Input Class-D Audio Solution for Automotive Infotainment in the market. TAS6422’s 2.1-Mhz switching frequency allows customers to significantly reduce inductor size and cost and optimize total system cost. TAS6422 delivers 25W (10% THD+N) per channel into 4-Ω with a 14.4-V supply.

The TPA2006D1 audio power amplifier evaluation module is a complete, low-power single-channel audio power amplifier. It consists of the TI TPA2006D1 1.45-W low-voltage audio power amplifier IC in a very small DRB package, along with a small number of other parts mounted on a circuit board that is approximately 1.25 in. by 1.125 in (32 mm x 29 mm)

The TPA3101D2 evaluation module consists of a single 10-W, class-D, stereo audio power amplifier complete with a small number of external components mounted on a circuit board that can be used to directly drive a speaker with an external analog audio source as the input.

The MAX98306 stereo 3.7W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

The TS4995 is fully differential structure power audio amplifier which is capable of delivering 1.2W of continuous RMS output power into an 8Ω load at 5V. Due to its differential inputs, it exhibits outstanding noise immunity.

This evaluation board is designed for the TS4984 stereo audio power amplifier. The micro-package QFN16 (quad, flat, non-leaded, 16-pin) combines space-saving with good thermal dissipation.

While bridged amplifier configurations are able to provide high power levels, they also consume four times more power than a conventional single-ended solution. However, it is feasible to conservatively design a 100W bridged amplifier solution, as will be shown here.

This user’s guide describes the operation of the evaluation module (TPA3251D2EVM) for the TPA3251D2 175-W Stereo/350-W mono PurePath™ Ultra-HD Analog Input Power Stage. The user’s guide also provides design information, which includes schematic, BOM, and PCB layout.