LM380 is a 2.5W audio amplifier. The input signal can be ground referenced, the output voltage is automatically centered at one-half the supply voltage. There is short circuit protection and the output power range is wide. It can be used in various audio systems.
The LM380 is a low‑cost audio power amplifier designed for consumer applications. It features a fixed 34 dB gain, ground‑referenced input stage, and an output that self‑centers at half the supply voltage. The device includes short‑circuit protection and internal thermal limiting, and is supplied in a standard dual‑in‑line package with heat‑sink pins.
Typical applications include phonograph amplifiers, intercoms, line drivers, teaching‑machine outputs, alarms, ultrasonic drivers, TV sound systems, AM‑FM radios, small servo drivers and power converters. Key specifications are a supply voltage range of 10 V‑22 V, peak output current of 1.3 A, output power of 2.5 W, input impedance of 150 kΩ, and total harmonic distortion of 0.2 %.
| Supply Voltage Range | 10 V‑22 V |
|---|---|
| Quiescent Power Drain | 0.13 W (Vs=18 V) |
| Voltage Gain | Fixed at 50 (≈34 dB) |
| Peak Output Current | 1.3 A |
| Input Impedance | 150 kΩ |
| Total Harmonic Distortion | 0.2 % |
| Quiescent Supply Current | 25 mA |
The LM380 operates from 10 V to 22 V supply voltage.
The LM380 has an input impedance of 150 kΩ.
It can source or sink up to 1.3 A of peak current.