The TPA321 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications where internal speakers are required. Operating with a 3.3-V supply, the TPA321 can deliver 250 mW of continuous power into a BTL 8-Ω load at less than 1% THD+N throughout voice band frequencies. This device features a shutdown mode for power-sensitive applications with a quiescent current of 0.15 µA during shutdown. The TPA321 is available in an 8-pin SOIC surface-mount package.
The TPA321 SLOS312C is a bridge‑tied‑load (BTL) audio power amplifier designed for low‑voltage, battery‑powered applications. It operates from a 2.5 V to 5.5 V supply and delivers up to 250 mW at 3.3 V or 350 mW at 5 V into an 8 Ω load, with less than 1 % THD+N across the voice band.
Key features include ultralow shutdown current (0.15 µA), thermal and short‑circuit protection, and a compact SOIC or PowerPAD™ MSOP package. The device is fully specified for 3.3‑V and 5‑V operation and offers a wide supply voltage compatibility range, making it suitable for portable audio and cellular communication equipment.
| Supply voltage range | 2.5 V – 5.5 V |
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The device operates from 2.5 V up to 5.5 V.
Yes, it has thermal and short‑circuit protection.