The LM4952 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. It is capable of delivering 3.1 watts per channel to a 4Ω single-ended load with less than 1% THD+N when powered by a 12VDC power supply. It has independent volume control for high and low frequencies, internal temperature protection function, short circuit protection function, and no noise when switching on and off.
The LM4952 audio power amplifier is designed for flat‑panel monitors and TVs, delivering up to 3.1 W per channel into a 4 Ω load with less than 1 % THD+N when powered from a 12 V supply. It features an internal DC‑controlled volume control, eliminating the need for external feedback resistors, boot‑strap capacitors or snubber circuits.
The device includes several protection mechanisms such as pop‑and‑click circuitry to suppress turn‑on/off noise, an active‑low shutdown mode, thermal shutdown, and short‑circuit protection, making it suitable for compact, high‑power display applications.
| Quiescent Power Supply Current | 18 mA typ |
|---|---|
| Output Power (RL=4Ω) | 3.8 W typ |
| THD+N (1 kHz, 1 W) | 1 % typical |
| Thermal Shutdown Temperature | 170 °C |
The LM4952 draws about 18 mA of quiescent current under typical conditions.
The amplifier can deliver up to 3.8 W into a 4 Ω load at 12 V supply with less than 1 % THD+N.