The LM4903 is a 1 watt audio power amplifier from TI that is designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8 ohm load with less than 1% distortion (THD+N) from a 5 volt power supply.
The LM4903 audio power amplifier is designed for portable communication devices such as mobile phones and PDAs. It delivers up to 1 W continuous average power into an 8 Ω BTL load with less than 1 % THD+N from a 5 V supply and includes features like ultra‑low shutdown current and internal thermal protection.
The device is offered in a space‑saving MSOP package, operates from 2.0 V to 5.5 V, and requires no external output coupling or bootstrap capacitors. Detailed electrical characteristics, typical performance graphs, PCB layout guidelines, and physical dimensions are provided for designers.
| Shutdown Current | 0.1 pA (typ) |
|---|---|
| Supply Voltage (Absolute Maximum) | 6.0 V |
| Operating Supply Voltage Range | 2.0 V – 5.5 V |
The LM4903 has a typical shutdown current of 0.1 pA.
It operates from 2.0 V up to 5.5 V.
No, the LM4903 does not require output coupling or bootstrap capacitors.