This datasheet describes the TPA0233, a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4-Ω impedance. The mono signal is created by summing left and right inputs. The amplifier can be reconfigured on the fly to drive two stereo single-ended (SE) signals into headphones. This makes the device ideal for use in small notebook computers, PDAs, digital personal audio players, anywhere a mono speaker and stereo headphones are required. From a 5-V supply, the TPA0233 delivers 2 W of power into a 4-Ω speaker. The gain of the input stage is set by the user-selected input resistor and a 50-kΩ internal feedback resistor (AV = - RF/ RI). The power stage is internally configured with a gain of -1.25 V/V in SE mode, and -2.5 V/V in BTL mode. Thus, the overall gain of the amplifier is -3.75 V/V in SE mode or -5 V/V in BTL mode.
The TPA0233 is a 2‑W mono bridge‑tied‑load (BTL) audio power amplifier designed for notebook computers, PDAs and other portable audio devices. It can be reconfigured on‑the‑fly to drive two stereo single‑ended headphone outputs, making it suitable for both speaker and headphone applications.
The device operates from a 3‑V to 5‑V supply, draws only a few milliamps of current, and is packaged in a thermally‑enhanced 10‑pin MSOP (DGQ). It includes a TTL‑compatible shutdown pin and works over an ambient temperature range of –40 °C to 85 °C.
| Typical supply current (5 V) | 4 mA |
|---|---|
| Operating temperature range | -40 °C to 85 °C |
| Package | 10‑pin thermally‑enhanced MSOP (DGQ) |
The TPA0233 draws about 4 mA typical from a 5 V supply.
When held low, the SHUTDOWN pin places the device in shutdown mode; it is TTL compatible.
The amplifier operates from –40 °C to 85 °C.