This document is about TI's TPA721 audio power amplifier, which is a low-voltage audio power amplifier that supports 3.3-V and 5-V power supplies. The output power is 250-mW and the operating frequency is 20 kHz
The TPA721 SLOS231E is a bridge‑tied‑load (BTL) audio power amplifier designed for low‑voltage applications such as battery‑powered equipment. It operates from 2.5 V to 5.5 V, provides integrated depop circuitry, shutdown mode with 7 µA supply current, and includes thermal and short‑circuit protection.
Typical performance includes 250 mW continuous output at 3.3 V (8 Ω load) and up to 700 mW peak output at 5 V. The device is offered in 8‑pin SOIC and PowerPAD MSOP packages, and its specifications are detailed in the electrical and operating characteristic tables.
| Supply voltage range | 2.5 V – 5.5 V |
|---|---|
| Shutdown supply current | 7 µA |
| Output power (3.3 V) | 250 mW into 8 Ω (BTL) |
| Output power (5 V) | 700 mW into 8 Ω (BTL) |
| Total harmonic distortion + noise | 0.5 % THD+N |
The device operates from 2.5 V to 5.5 V.
It can deliver up to 700 mW into an 8 Ω load in BTL mode.
The shutdown mode draws about 7 µA.