Overview
The LM3886TF, produced by Texas Instruments, is a high-performance audio power amplifier designed to deliver exceptional audio quality and robust protection features. 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. The LM3886TF is particularly suited for audiophiles and electronic enthusiasts due to its simplicity, high fidelity, and comprehensive protection mechanisms.
Key Specifications
| Specification | Value |
|---|---|
| Output Power (4Ω load) | 68W (VCC = ±28V) |
| Output Power (8Ω load) | 38W (VCC = ±28V), 50W (VCC = ±35V) |
| Instantaneous Peak Output Power | 135W |
| Signal-to-Noise Ratio (SNR) | ≥ 92dB |
| Total Harmonic Distortion + Noise (THD+N) | 0.03% at rated output |
| Intermodulation Distortion (IMD) SMPTE | 0.004% |
| Supply Voltage Range | 20V - 94V |
| Operating Temperature Range | 0°C to 70°C |
| Package Type | 11-Lead TO-220 |
Key Features
- High-Performance Audio: Delivers 68W into 4Ω and 38W into 8Ω with 0.1% THD+N from 20Hz to 20kHz.
- SPiKe Protection: Self Peak Instantaneous Temperature protection safeguards against overvoltage, undervoltage, overloads, thermal runaway, and instantaneous temperature peaks.
- Mute Function: An input mute function allows the user to mute the amplifier by drawing less than 0.5 mA from the mute pin.
- Output Protection: Internal current limiting circuitry protects against shorts to ground or the supplies, and over-voltage protection against transients from inductive loads.
- Supply Under-Voltage Protection: Prevents internal biasing when supply voltages are below 12V, eliminating turn-on and turn-off transients.
- Low Noise Floor: Typical low noise floor of 2.0µV and a high signal-to-noise ratio of ≥ 92dB.
Applications
- Component stereo and compact stereo systems
- Self-powered speakers and surround-sound amplifiers
- High-end stereo TVs and home audio systems
- Home theaters and public address systems
- Portable audio systems and battery-powered amplifiers
- DIY audio projects and computer audio systems
Q & A
- What is the maximum output power of the LM3886TF into a 4Ω load?
The LM3886TF can deliver up to 68W of continuous average power into a 4Ω load at VCC = ±28V.
- What is the THD+N of the LM3886TF at rated output?
The THD+N of the LM3886TF is 0.03% at the rated output into the rated load.
- What protection features does the LM3886TF have?
The LM3886TF includes SPiKe protection, output protection from shorts, over-voltage protection, and supply under-voltage protection.
- How does the mute function work on the LM3886TF?
The mute function is activated by drawing less than 0.5 mA from the mute pin, which places the amplifier into mute mode.
- What is the signal-to-noise ratio of the LM3886TF?
The signal-to-noise ratio of the LM3886TF is ≥ 92dB.
- What is the operating temperature range of the LM3886TF?
The operating temperature range of the LM3886TF is 0°C to 70°C.
- What is the supply voltage range for the LM3886TF?
The supply voltage range for the LM3886TF is 20V to 94V.
- What package type is the LM3886TF available in?
The LM3886TF is available in an 11-Lead TO-220 package.
- What are some common applications of the LM3886TF?
Common applications include component stereo, self-powered speakers, home theaters, and DIY audio projects.
- How does the LM3886TF protect against thermal runaway?
The LM3886TF protects against thermal runaway through its SPiKe protection circuitry, which safeguards against instantaneous temperature peaks.
