This is a low-voltage audio power amplifier that can provide 250mW of continuous power at 3.3V and supports headphone driving.
The TPA711 is a bridge‑tied load (BTL) or single‑ended (SE) audio power amplifier designed for low‑voltage applications such as battery‑powered equipment and ear‑phone drivers. It operates from 3.3 V to 5.5 V supplies and can deliver 250 mW continuous power in BTL mode with less than 0.6 % THD+N across the voice band. The device can switch on‑the‑fly between BTL and SE modes, eliminating the need for external coupling capacitors or mechanical switches.
The amplifier is offered in an 8‑pin SOIC package (TPA711D) and a PowerPAD MSOP package (TPA711DGN), reducing board space and height. It includes a shutdown pin with ultra‑low quiescent current and integrated depop circuitry to suppress speaker noise when exiting shutdown mode.
| Supply voltage range | 3.3 V – 5.5 V |
|---|---|
| Maximum output power (BTL) | 700 mW at Vpp = 5 V, RL = 8 Ω |
| Maximum output power (SE) | 85 mW at Vpp = 5 V, RL = 32 Ω |
| Shutdown pin quiescent current | 7 pA at 3.3 V |
The TPA711 can deliver up to 700 mW at Vpp = 5 V into an 8 Ω load when operated in BTL mode.
The SE/BTL pin controls the mode: pulling it low selects BTL mode, pulling it high selects SE mode.