LM4859TL/NOPB vs TDA8933T/N1,118
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | NXP USA Inc. |
| Description | IC AMP CLASS AB STER 1.6W 30USMD | IC AMP CLSS D MONO/STER 32W 32SO |
| Package | Bulk | Tape & Reel (TR) |
| Series | Boomer® | - |
| Type | Class AB | Class D |
| Features | 3D, Depop, I²C, Mute, Shutdown, Thermal Protection, Volume Control | Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection |
| Voltage - Supply | 2.7V ~ 5.5V | 10V ~ 36V, ±5V ~ 18V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 30-WFBGA | 32-SOIC (0.295\", 7.50mm Width) |
| Supplier Device Package | 30-DSBGA | 32-SO |
| Output Type | 2-Channel (Stereo) with Stereo Headphones | 1-Channel (Mono) or 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 1.6W x 2 @ 4Ohm; 75mW x 2 @ 32Ohm | 32W x 1 @ 16Ohm; 15.7W x 2 @ 8Ohm |
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1. 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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2. 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.
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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.
