LM3886TF vs TPA311D
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | National Semiconductor | Texas Instruments |
| Description | LM3886 68W, 1 CH, 20-94V SUPPLY | IC AMP CLASS AB MONO 700MW 8SOIC |
| Package | Bulk | Cut Tape (CT) |
| Series | Overture™ | - |
| Type | Class AB | Class AB |
| Features | Mute, Short-Circuit and Thermal Protection | Depop, Short-Circuit and Thermal Protection, Shutdown |
| Voltage - Supply | 20V ~ 84V, ±10V ~ 42V | 2.5V ~ 5.5V |
| Operating Temperature | -20°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole | Surface Mount |
| Package / Case | TO-220-11 Isolated Tab, Formed Leads | 8-SOIC (0.154\", 3.90mm Width) |
| Supplier Device Package | TO-220-11 Isolated | 8-SOIC |
| Output Type | 1-Channel (Mono) | 1-Channel (Mono) |
| Max Output Power x Channels @ Load | 68W x 1 @ 4Ohm | 700mW x 1 @ 8Ohm |
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1. What is an audio amplifier and what does it do?
An audio amplifier is a device that amplifies an audio signal, such as music or speech, to a higher voltage or current level to drive speakers or headphones, ensuring that the sound remains clear and accurate when played at higher volumes.
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2. How to choose a suitable audio amplifier?
When choosing an audio amplifier, factors such as output power, total harmonic distortion (THD), signal-to-noise ratio (SNR), efficiency, impedance matching (speaker impedance), and power consumption should be taken into consideration to ensure that it is well-matched with the speakers and audio source equipment.
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3. What is the Total Harmonic Distortion (THD) of an audio amplifier?
Total Harmonic Distortion (THD) is the distortion component introduced by an audio amplifier during the signal amplification process. the lower the THD, the closer the amplified audio signal will be to the original signal, and usually high quality audio amplifiers have a THD value of less than 1%.
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4. How can I improve the thermal performance of my audio amplifier?
Audio amplifiers generate heat when they operate, especially Class A and Class AB amplifiers. Ways to improve heat dissipation include using a larger heat sink, adding a fan, or using a more efficient Class D amplifier. A good thermal design will improve the performance and life of the amplifier.
