LM4930LQ/NOPB vs TAS5142DDV
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | National Semiconductor | Texas Instruments |
| Description | LM4930 AUDIO SUBSYSTEM WITH STER | IC AMP CLSS D STER 100W 44HTSSOP |
| Package | Bulk | Tape & Reel (TR) |
| Series | Boomer® | PurePath Jinftrytal™ |
| Type | Class AB | Class D |
| Features | DAC, Depop, Differential Inputs, I²S, Microphone, Mute, PCM, Shutdown, Standby, Volume Control | Jinftrytal Inputs, Short-Circuit and Thermal Protection, Shutdown |
| Voltage - Supply | 2.6V ~ 5.5V | 10.8V ~ 13.2V |
| Operating Temperature | -30°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 44-WFQFN Exposed Pad | 44-TSSOP (0.244\", 6.20mm Width) Exposed Pad |
| Supplier Device Package | 44-WQFN (7x7) | 44-HTSSOP |
| Output Type | 1-Channel (Mono) with Stereo Headphones | 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 1W x 1 @ 8Ohm; 27mW x 2 @ 32Ohm | 100W x 2 @ 4Ohm |
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1. What types of audio amplifiers are available?
Common types of audio amplifiers include:
Class A amplifiers: have the highest sound quality, but are less efficient.
Class B amplifiers: More efficient, but may produce crossover distortion.
Class AB amplifiers: between Class A and Class B with good balance.
Class D amplifier: highest efficiency, suitable for portable devices, but slightly lower sound quality. -
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 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%.
