LM3886TF
The LM3886TF, an audio amplifier manufactured by TI, belongs to the AB class and supports supply voltages ranging from 20V to 84V and ±10V to 42V. It comes with formed leads in a TO-220-11 isolated tab package and has standard protections including heat, short circuit, and mute.
Description
Overview
The LM3886TF is an advanced audio power amplifier known for its impressive performance. It can deliver 68W of continuous power into a 4-ohm load and 38W into an 8-ohm load with only 0.1% THD+N across frequencies from 20Hz to 20kHz, ensuring excellent sound quality. With a signal-to-noise ratio greater than 92dB and a low noise floor of just 2.0uV, it provides clear audio output. This amplifier also boasts extremely low distortion levels, measuring only 0.03% at the rated output, and exceptional linearity with an IMD (SMPTE) rating of 0.004%. It's a top choice for audio applications requiring high fidelity and reliability.
Comprehensive Protection
Under-Voltage Protection: Ensures power supplies and capacitors reach full values before activating LM3886TF to prevent DC output spikes during system power-up. Similarly, during turn-off, the output is grounded before power supplies to prevent transients.
Over-Voltage Protection: Limits output current to approximately 11Apeak and provides voltage clamping without internal diodes, managing large current spikes efficiently.
SPiKe Protection: Guards against instantaneous peak-temperature stressing using a power transistor array, with possible waveform distortion when activated.
Thermal Protection: Shuts down at 165°C and restarts at 155°C, cycling between these temperatures to reduce thermal stress and enhance reliability under sustained fault conditions.
Supply Bypassing Simplified
The LM3886 has great power supply rejection and doesn't need a regulated supply. But to avoid oscillations, it's important to bypass all op amps and power op amps with low-inductance capacitors placed close to the package terminals. If bypassing isn't enough, it can lead to "motorboating" or high-frequency issues. Using a big capacitor (10 μF or more) and a small ceramic one (0.1 μF) helps absorb low-frequency changes and prevents high-frequency feedback. If bypassing isn't done well, the load current's rectified part might feed back into internal circuitry, causing distortion at high frequencies. So, using a big electrolytic capacitor (470 μF or more) at the package terminals is crucial.
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Product parameter information
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Category: IC - Audio Amplifiers |
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Manufacturer: Texas Instruments |
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Series: Overture™ |
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Type: AB Class |
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Output Type: 1-Channel (Mono) |
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Maximum Output Power at Different Loads x Channels: 68W x 1 @ 4 Ohms |
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Supply Voltage: 20V ~ 84V, ±10V ~ 42V |
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Features: Mute, Short Circuit, and Thermal Protection |
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Mounting Type: Through Hole |
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Operating Temperature: -20°C ~ 85°C (TA) |
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Supplier Device Package: TO-220-11 Isolated |
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Package / Case: TO-220-11 Isolated Tab, Formed Leads |
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Base Product Number: LM3886 |
FAQ
Q: What distinguishes the LM3886TF audio amplifier from others?
Q: Is it possible to utilize the LM3886TF in many kinds of audio systems?
Q: Is installing the LM3886TF simple?
Q: Are there any particular cooling considerations needed for the LM3886TF?
Q: Where can I access comprehensive technical details and support for this model?
Q: How do I order product and check for product availability?
Q: Is there a possibility of providing customized electronic component solutions?
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