Overview
The LM3886T, produced by Texas Instruments, is a high-performance audio power amplifier designed to deliver exceptional audio quality and reliability. This amplifier is capable of delivering 68W of continuous average power to a 4Ω load and 38W into an 8Ω load with a total harmonic distortion plus noise (THD+N) of 0.1% from 20Hz to 20kHz. It features advanced protection mechanisms, including Self Peak Instantaneous Temperature (SPiKe) protection, which safeguards the amplifier against overvoltage, undervoltage, overloads, thermal runaway, and sudden temperature spikes.
Key Specifications
| Parameter | Value |
|---|---|
| Audio Input Type | Analog Input |
| Power Stage Supply (max) | 94V |
| Power Stage Supply (min) | 20V |
| Load (min) | 4Ω |
| Output Power | 68W into 4Ω at VCC = ±28V |
| Signal-to-Noise Ratio (SNR) | ≥ 92dB |
| Total Harmonic Distortion + Noise (THD+N) | 0.03% at 1W, 1kHz |
| Operating Temperature Range | 0°C to 70°C |
| Package | TO-220 (NDJ)-11 |
Key Features
- High output power capability: 68W into 4Ω and 38W into 8Ω at VCC = ±28V.
- Low distortion: 0.03% THD+N at the rated output across the audio spectrum.
- High signal-to-noise ratio: ≥ 92dB.
- Input mute function.
- Output protection: short to ground or supplies, over-voltage protection, and supply under-voltage protection.
- SPiKe protection: safeguards against overvoltage, undervoltage, overloads, thermal runaway, and instantaneous temperature peaks.
- Wide supply voltage range: ±20V to ±84V.
- Minimal external components required for easy integration.
- Internal ESR compensation for low output impedance.
Applications
The LM3886T is versatile and suitable for various audio applications, including:
- Component and compact stereo systems.
- Self-powered speakers.
- Surround-sound amplifiers.
- High-end stereo TVs.
- DIY audio projects and professional audio installations.
Q & A
- What is the maximum output power of the LM3886T?
The LM3886T can deliver up to 68W of continuous average power into a 4Ω load and 38W into an 8Ω load at VCC = ±28V. - What is the signal-to-noise ratio of the LM3886T?
The signal-to-noise ratio of the LM3886T is greater than 92dB. - What protection mechanisms does the LM3886T have?
The LM3886T features SPiKe protection, output protection from shorts to ground or supplies, over-voltage protection, and supply under-voltage protection. - What is the operating temperature range of the LM3886T?
The operating temperature range is from 0°C to 70°C. - What package type does the LM3886T come in?
The LM3886T comes in a TO-220 (NDJ)-11 package. - What is the typical THD+N value of the LM3886T?
The typical THD+N value is 0.03% at the rated output. - Does the LM3886T have an input mute function?
Yes, the LM3886T has an input mute function that can be activated by drawing less than 0.5 mA from the mute pin. - What is the wide supply voltage range of the LM3886T?
The wide supply voltage range is from ±20V to ±84V. - Is the LM3886T suitable for DIY audio projects?
Yes, the LM3886T is suitable for both DIY audio projects and professional audio installations. - What is the typical IMD (SMPTE) rating of the LM3886T?
The typical IMD (SMPTE) rating is 0.004%.
