The LM384 is a National Semiconductor power audio amplifier for consumer applications. The gain is internally fixed at 34 dB, the input stage allows ground referenced input signals, the output automatically self-centers to one-half the supply voltage, the output is short-circuit proof with internal thermal limiting.
The LM384 audio power amplifier is designed for consumer applications such as phonograph amplifiers, intercoms, line drivers and TV sound systems. It features a fixed gain, ground‑referenced input stage, short‑circuit proof output and internal thermal limiting.
The device is supplied in a standard dual‑in‑line (DIP) package, operates from 12 V to 26 V, delivers up to 5 W into an 8 Ω load, and includes protection against shorted speaker conditions up to 22 V.
| Supply Voltage Range | 12 V to 26 V |
|---|---|
| Fixed Voltage Gain | 50 (gain) |
| Output Power | 5 W into 8 Ω |
| Peak Output Current | 1.3 A |
| Input Impedance | 150 kΩ |
| Total Harmonic Distortion | 0.25 % at 4 W, 8 Ω |
| Quiescent Supply Current | 8.5 mA typical |
| Operating Temperature Range | 0 °C to +70 °C |
| Storage Temperature Range | -65 °C to +150 °C |
| Thermal Resistance | 30 °C/W |
| Package Type | Molded Dual‑In‑Line (DIP) |
The LM384 operates from 12 V up to 26 V.
It can deliver up to 5 W of audio power into an 8 Ω speaker.
Yes, the output is fully protected against a shorted speaker at all voltages up to 22 V.
Typical quiescent supply current is about 8.5 mA.