LM383T IC 7W Audio Power Amplifier 5-to-20V
The LM383T is a monolithic 7W audio power amplifier IC designed for cost-sensitive, high-power applications, particularly in automotive systems. It efficiently drives low-impedance loads (down to 2Ω) with minimal distortion, leveraging a 3.5A peak current capability. The device operates across a broad 5V–20V supply range, accommodating voltage fluctuations typical in vehicles.
Engineered for durability, the IC incorporates thermal protection and current limiting to prevent damage during overloads. Its TO-220 package ensures efficient heat dissipation, while the absence of turn-on transients eliminates audible pops during startup. High input impedance simplifies integration with diverse audio sources, requiring few external components for stable operation.
Optimized for clarity, the LM383T minimizes noise and distortion even at high volumes. The LM383A variant adds transient voltage protection (up to 40V), shielding against automotive electrical spikes. This combination of resilience, simplicity, and audio fidelity makes it ideal for demanding environments.
Features:
- High peak current capability (3.5A).
- Wide supply voltage range (5V–20V).
- Externally programmable gain.
- Low distortion and noise.
- High input impedance.
- No turn-on transients.
- AC short-circuit protection.
- Thermal and current limiting.
- High-voltage protection (LM383A variant).
- Minimal external components required.
Specifications:
| Parameter | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|
| Supply Voltage Range: | 5 | – | 20 | V | Operating |
| Quiescent Current: | – | 45 | 80 | mA | Excl. feedback resistors |
| Output Power (4Ω): | 4.8 | 5.5 | – | W | VS=14.4V, THD=10%, f=1kHz |
| Output Power (2Ω): | 7 | 8.6 | – | W | VS=14.4V, THD=10%, f=1kHz |
| THD (Total Harmonic Distortion): | – | 0.2 | – | % | Po=2W, RL=4Ω, f=1kHz |
| Bandwidth: | – | 30 | – | kHz | Gain=40 dB |
| Input Resistance: | – | 150 | – | kΩ | – |
| Peak Supply (50ms): | – | – | 25 | V | LM383 (40V for LM383A) |
| Operating Temperature: | 0 | – | 70 | °C | – |
Pinout Diagram:
Footprint:
Applications:
- Automotive audio systems.
- Portable speakers.
- Public address amplifiers.
- Consumer audio devices.
- Battery-powered amplifiers.
Package Contents:
- 1x LM383T IC 7W Audio Power Amplifier 5-to-20V
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