LM4930LQ/NOPB vs TAS5622ADDVR
| 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 D MONO/STER 300W 44HTSSOP |
| Package | Bulk | Cut Tape (CT) |
| Series | Boomer® | PurePath™ HD |
| Type | Class AB | Class D |
| Features | DAC, Depop, Differential Inputs, I²S, Microphone, Mute, PCM, Shutdown, Standby, Volume Control | Depop, Jinftrytal Inputs, Short-Circuit and Thermal Protection, Shutdown |
| Voltage - Supply | 2.6V ~ 5.5V | 12V ~ 34V |
| 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 | 1-Channel (Mono) or 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 1W x 1 @ 8Ohm; 27mW x 2 @ 32Ohm | 300W x 1 @ 2Ohm; 150W x 2 @ 4Ohm |
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1. 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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2. 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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3. 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.
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4. What should the frequency response range of an audio amplifier be?
The frequency response range of a good quality audio amplifier is usually between 20Hz and 20kHz, which is the typical frequency range that the human ear can hear. A wider frequency response ensures that the audio amplifier can accurately reproduce both low and high frequency details.
