The TPA311 is a 350mW single-ended audio power amplifier developed especially for low-voltage applications where internal speakers and external earphone operation are required.
The TPA311 is a bridge‑tied load (BTL) or single‑ended (SE) audio power amplifier designed for low‑voltage applications such as battery‑powered devices. It operates from a 2.5 V to 5.5 V supply and can deliver up to 350 mW into an 8 Ω load in BTL mode at 5 V, with THD+N of 0.5 %.
The device includes a shutdown mode (7 µA at 3.3 V, 60 µA at 5 V), integrated depop circuitry to eliminate speaker pop, and thermal/short‑circuit protection. It is offered in 8‑pin SOIC and PowerPAD MSOP packages, and the datasheet provides detailed electrical characteristics, typical performance graphs, and application notes.
| Maximum output power (BTL, 5 V) | 350 mW |
|---|---|
| Maximum output power (BTL, 3.3 V) | 250 mW |
| Shutdown current (3.3 V) | 7 µA |
| Shutdown current (5 V) | 60 µA |
At 5 V the amplifier can deliver up to 350 mW in BTL mode.
Shutdown current is 60 µA when VDD is 5 V.