The LM4992 is a 420mW stereo cell phone audio amplifier designed by Texas Instruments for demanding applications in mobile phones and other portable communication device applications. It can deliver 1 watt per channel of continuous average power to an 8 ohm BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication devices. It is capable of delivering 1 watt per channel to an 8 ohm BTL load with less than 1% distortion from a 5V power supply. The device features independent shutdown control for each channel and an internal thermal shutdown protection mechanism.
| Stereo Output Power (5V, 8Ω, 1% THD) | 1.07W (typ) |
|---|---|
| Stereo Output Power (3.3V, 8Ω, 1% THD) | 420mW (typ) |
| Shutdown Current (3.3V) | 0.2uA (typ) |
| Operating Voltage Range | 2.2 - 5.5V |
| Total Harmonic Distortion+Noise | 0.15 % |
The typical output power is 420mW per channel into an 8Ω load with 1% THD.
No, the LM4992 does not require output coupling capacitors or bootstrap capacitors.
The shutdown current is typically 0.2uA when Vgg is 3.3V.