LM4921ITL/NOPB vs TPA3117D2RHBT
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLASS AB STER 50MW 20USMD | IC AMP CLASS D STEREO 15W 32VQFN |
| Package | Tape & Reel (TR) | -Reel® |
| Series | Boomer® | SpeakerGuard™ |
| Type | Class AB | Class D |
| Features | DAC, I²S, Mute, Shutdown, SPI, Standby, Thermal Protection, Volume Control | Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown |
| Voltage - Supply | 2.6V ~ 5.5V | 8V ~ 26V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 20-WFBGA, DSBGA | 32-VFQFN Exposed Pad |
| Supplier Device Package | 20-DSBGA | 32-VQFN (5x5) |
| Output Type | Headphones, 2-Channel (Stereo) | 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 50mW x 2 @ 32Ohm | 15W x 2 @ 8Ohm |
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1. 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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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. 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.
