TPA321DR TI Audio Amplifiers

TPA321DR is a mono Class-AB BTL audio amplifier from Texas Instruments, designed for low-power battery-operated voice and audio systems. It supports 2.5 V to 5.5 V supply range, outputting 350 mW into 8 Ω load at 5 V and 250 mW at 3.3 V with below 1% THD+N across voice frequency band. Equipped with differential input, integrated thermal protection and short-circuit protection, it achieves an ultra-low 0.15 μA shutdown current to maximize battery runtime. Its BTL architecture eliminates output coupling capacitors, simplifying circuit design and lowering overall system cost. Offered in standard SOIC package, it fits layouts with limited board area. This reliable amplifier is the preferred choice for voice playback terminals, mobile devices, two-way radios, portable medical equipment and low-power IoT speakers that require stable mono audio amplification and long battery life in compact designs. In stock at HL Electronics – request a quote for fast delivery.