LM4876MM/NOPB vs BH7826FVM-TR
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | National Semiconductor | Rohm Semiconductor |
| Description | LM4876 1.1W AUDIO POWER AMPLIFIE | IC AMP CLASS AB MONO 500MW 8MSOP |
| Package | Bulk | Bulk |
| Series | Boomer® | - |
| Type | Class AB | - |
| Features | Shutdown, Thermal Protection | - |
| Voltage - Supply | 2V ~ 5.5V | - |
| Operating Temperature | -40°C ~ 85°C (TA) | - |
| Mounting Type | Surface Mount | - |
| Package / Case | 10-TFSOP, 10-MSOP (0.118\", 3.00mm Width) | - |
| Supplier Device Package | 10-VSSOP | - |
| Output Type | 1-Channel (Mono) | - |
| Max Output Power x Channels @ Load | 1.5W x 1 @ 8Ohm | - |
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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 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. -
3. What is a Class D audio amplifier and what are its advantages?
Class D audio amplifiers work through Pulse Width Modulation (PWM) technology and have extremely high efficiency (typically up to 90% or higher), making them suitable for use in portable audio equipment or high-efficiency sound systems. It generates less heat because it reduces energy consumption.
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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.
