LM4902LD/NOPB

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LM4902LD/NOPB is a high-performance, low noise audio amplifier specifically designed to deliver excellent power-on-demand performance. It is best suited for applications that require superior audio performance and require low-noise amplification. The LM4902LD/NOPB delivers high-quality audio amplification with low distortion, low power consumption, and improved sound clarity.

Description

The LM4902LD/NOPB is a dual-channel audio amplifier suitable for demanding applications where high-performance and low-noise amplification is required. This audio amplifier can deliver up to 5W per channel into 8 ohms from a 9V dual supply. Thanks to its low distortion and low noise features, the amplifier can be used in a wide variety of audio applications such as the audio component of a computer, portable audio players, and wireless audio.

The LM4902LD/NOPB is a low-power, low-voltage amplifier that is capable of delivering 5 watts per channel. The amplifier operates on dual supplies of 9V, however it can be operated with a single supply of 4.5V up to 8.5V. The LM4902LD/NOPB can also be disabled and enable with a single logic wiring in applications that require power saving and noise reduction.

Features

• Low-noise output
• High-current output
• High-performance audio frequency response
• Low distortion
• High output power
• Wide supply voltage range
• Flexible power saving and noise reduction options

Specifications

• Supply Voltage: Single or Dual 4.5V to 8.5V
• Supply Current: 4.8mA
• Output Power: 5W per channel
• Total Harmonic Distortion (THD): 0.03%
• Output Impedance: 8 ohms
• Frequency Response: 20Hz - 20kHz
• Operating Temperature Range: -40C to +85C

Applications

The LM4902LD/NOPB is well-suited for a variety of applications that require superior audio performance and low-noise amplification. These applications include:

• Computer audio systems
• Portable audio players
• Headphones amplifiers
• Wireless audio systems
• TV and video game audio systems.

Working Principle

The working principle of the LM4902LD/NOPB is based on the mux-output stage topology. This topology makes it possible to achieve high power efficiency while maintaining low distortion and low noise. The amplifier is designed with a differential pair of transistors which form the input stage. The gain of this input stage is controlled by the feedback loop, meaning that the output signal is compared to the input signal. This comparison is done by comparing the voltage levels and current levels of the signal. If a deviation is detected, the output signal is corrected and signal distortion is minimized.

The output stage of the LM4902LD/NOPB is designed using a mux-output stage which consists of three complementary bipolar transistors connected in a bridge configuration. This bridge is responsible for delivering the output power. This topology allows the amplifier to achieve high efficiency and high power while simultaneously delivering low distortion and low noise.

Conclusion

The LM4902LD/NOPB is a high-performance, low-noise audio amplifier specifically designed to deliver outstanding power-on-demand performance. This amplifier is well-suited for a wide range of audio applications where high-performance and low-noise amplification is required. The LM4902LD/NOPB is a low-power, low-voltage amplifier capable of delivering 5 watts per channel. It operates on dual supplies of 9V and can be disabled for power-saving and noise-reduction purposes. The amplifier is designed with a mux-output stage topology which allows it to achieve high efficiency and power while maintaining low distortion and low noise.

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