This document introduces LME49810 high fidelity audio power amplifier driver, which has very high output voltage range, high output drive current, high PSRR and low THD+N. The chip also has thermal shutdown and mute function, customizable external compensation, and scalable output power.
The LME49810 is a high‑fidelity audio power amplifier driver designed for demanding consumer and professional‑audio applications. It features an internal Baker clamp that provides soft clipping and a thermal‑shutdown circuit that activates above 150 °C.
Key specifications include a wide operating voltage range of +20 V to +100 V, a typical slew rate of 50 V/µs, output drive current of 60 mA (typ), PSRR of 1100 dB (typ), and THD+N of 0.0007 % at 1 kHz. The device offers customizable external compensation, scalable output power, and a mute function that forces the output to a quiescent state.
| Operating voltage range | +20 V to +100 V |
|---|---|
| Slew Rate | 50 V/µs (typ) |
| Output Drive Current | 60 mA (typ) |
| PSRR (DC) | 1100 dB (typ) |
| THD+N (1 kHz) | 0.0007 % (typ) |
| Minimum output current | 50 mA |
| Thermal shutdown temperature | 150 °C |
The device operates from +20 V up to +100 V.
Yes, it shuts down when the die temperature exceeds 150 °C.
Typical total harmonic distortion plus noise is 0.0007 % at 1 kHz.
Pin 1 is the ClpFlag (Baker Clamp Clip Flag) and Pin 2 is the Mute control.