LM4917MTX/NOPB vs LM4917SD/NOPB
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLSS AB STER 95MW 14TSSOP | IC AMP CLASS AB STER 95MW 14WSON |
| Package | Tray | -Reel® |
| Series | Boomer® | Boomer® |
| Type | Class AB | Class AB |
| Features | Depop, Short-Circuit and Thermal Protection, Shutdown | Depop, Short-Circuit and Thermal Protection, Shutdown |
| Voltage - Supply | 1.4V ~ 3.6V | 1.4V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 14-TSSOP (0.173\", 4.40mm Width) | 14-WFDFN Exposed Pad |
| Supplier Device Package | 14-TSSOP | 14-WSON (4x3) |
| Output Type | Headphones, 2-Channel (Stereo) | Headphones, 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 95mW x 2 @ 16Ohm | 95mW x 2 @ 16Ohm |
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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. What is a power amplifier and how is it different from an audio amplifier?
A power amplifier is a type of audio amplifier designed to drive high-power loads such as speakers. It is capable of amplifying audio signals to a sufficient power output to drive speakers to produce greater volume.
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3. 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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4. What is a Class D audio amplifier and what are its advantages?
Class D audio amplifiers work through Pulse Width Modulation (PWM) technology and have extremely high efficiency (typically up to 90% or higher), making them suitable for use in portable audio equipment or high-efficiency sound systems. It generates less heat because it reduces energy consumption.
