The LM4879 1.1 Watt Audio Power Amplifier is a high performance audio power amplifier specifically designed for demanding applications in mobile phones and other portable communication device applications. It can deliver 1.1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
The LM4879 audio power amplifier is designed for portable communication devices such as mobile phones, PDAs and other handheld electronics. It delivers up to 1.1 W continuous average power into an 8Ω BTL load while maintaining less than 1 % THD+N.
Key features include a global shutdown pin with ultra‑low 0.1 pA current, built‑in pop‑and‑click circuitry, unity‑gain stability, and operation without external output coupling or bootstrap capacitors. The device supports supply voltages from 2.2 V to 5.0 V and is available in space‑saving uSMD, LLP and MSOP packages.
| Power Output (5 V, 1 % THD+N) | 1.1 W (typ) |
|---|---|
| Power Supply Rejection Ratio (PSRR) | 62 dB (typ) at 5 V, 3 V @ 217 Hz |
| Shutdown Current | 0.1 pA (typ) |
| Supply Voltage Range | 2.2 V – 5.0 V |
The LM4879 has a typical shutdown current of 0.1 pA.
It operates from 2.2 V up to 5.0 V.
No, the LM4879 does not require output coupling, snubber, or bootstrap capacitors.
At 5 V supply the typical output power is 1.1 W with 1 % THD+N.