PAM8124RHR vs LM4915LQX/NOPB
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Diodes Incorporated | Texas Instruments |
| Description | IC AMP CLASS D STER 18W 24TSSOP | IC AMP CLASS AB MONO 400MW 8WQFN |
| Package | Tape & Reel (TR) | Cut Tape (CT) |
| Series | - | Boomer® |
| Type | Class D | Class AB |
| Features | Depop, Short-Circuit and Thermal Protection | Depop, Differential Inputs, Shutdown, Thermal Protection |
| Voltage - Supply | 10V ~ 26V | 2.2V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 24-TSSOP (0.173\", 4.40mm Width) Exposed Pad | 8-WQFN Exposed Pad |
| Supplier Device Package | 24-TSSOP-EP | 8-WQFN (2x2) |
| Output Type | 2-Channel (Stereo) | 1-Channel (Mono) with Mono Headphones |
| Max Output Power x Channels @ Load | 18W x 2 @ 4Ohm | 400mW x 1 @ 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. What is the signal-to-noise ratio (SNR) of an audio amplifier?
Signal-to-noise ratio (SNR) is a measure of the ratio of the audio signal to the background noise, with higher values indicating less noise in the audio signal. A high SNR usually means clearer sound output.
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4. Does the audio amplifier need to match the impedance of the speakers?
Yes, the output impedance of the audio amplifier should match the impedance of the speaker. Typically speakers have an impedance of 4Ω, 8Ω or 16Ω. Matching the impedance ensures that the amplifier delivers maximum power and the best sound quality from the speaker.
