LM48555TL/NOPB vs LM4844TL/NOPB
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLASS AB MONO 12USMD | IC AMP CLSS AB STER 1.2W 30DSBGA |
| Package | Tape & Reel (TR) | Bulk |
| Series | Boomer® | Boomer® |
| Type | Class AB | Class AB |
| Features | Depop, Differential Inputs, Shutdown | 3D, Depop, I²C, Mute, Shutdown, Volume Control |
| Voltage - Supply | 2.7V ~ 9V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 12-WFBGA | 30-WFBGA, DSBGA |
| Supplier Device Package | 12-uSMD (1.46x1.97) | 30-DSBGA |
| Output Type | 1-Channel (Mono) | 2-Channel (Stereo) with Stereo Headphones |
| Max Output Power x Channels @ Load | - | 1.2W x 2 @ 8Ohm; 80mW x 2 @ 32Ohm |
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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. How can I improve the thermal performance of my audio amplifier?
Audio amplifiers generate heat when they operate, especially Class A and Class AB amplifiers. Ways to improve heat dissipation include using a larger heat sink, adding a fan, or using a more efficient Class D amplifier. A good thermal design will improve the performance and life of the amplifier.
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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.
