The LM4872 is a 1-watt audio power amplifier in a micro SMD package. It is bridge-connected and capable of delivering 1 watt of continuous average power to an 8Ω load with less than 0.2% total harmonic distortion (THD) from a 5V power supply. The LM4872 is designed for low-power portable applications and does not require output coupling capacitors or bootstrap capacitors. It features an externally controlled low-power consumption shutdown mode and internal thermal shutdown protection mechanism.
The LM4872 audio power amplifier delivers up to 1 W continuous average power into an 8 Ω load with less than 0.2 % THD from a 5 V supply. It features an externally controlled shutdown mode, internal thermal protection, and is unity‑gain stable, making it suitable for low‑power portable applications such as cellular phones and portable computers.
The datasheet provides absolute maximum ratings, electrical characteristics, typical performance graphs, application design guidelines, and physical dimensions for the 8‑bump micro‑SMD package. It also includes PCB layout recommendations for mixed‑signal designs and a life‑support policy disclaimer.
| Shutdown Current | 0.01 µA (typ) |
|---|---|
| Supply Voltage Range | 2.0 V – 5.5 V |
| Quiescent Power Supply Current | 3.4 mA (max) |
| Output Offset Voltage | 5 mV (max) |
| THD (8 Ω, 1 kHz) | 0.2 % (max) |
The typical shutdown current is 0.01 µA.
It operates from 2.0 V to 5.5 V.
No, the LM4872 does not require output coupling or bootstrap capacitors.