LM48861TM/NOPB

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An audio amplifier is a device that takes an electrical signal, usually from an audio source such as a radio, computer, or microphone, and amplifies it to create a louder sound. The LM48861TM/NOPB is a highly integrated audio amplifier designed for low power applications with a low-voltage supply range, low quiescent current, and low-cost implementation. The amplifier can be used to drive a variety of loads, making it ideal for portable audio applications.

Specs

• Power Supply Range: 2.7 V to 5 V
• Gain Setting: 0 dB to 16 dB
• Max Output Power: 14 mW
• Quiescent Current: <1 mA
• Output Noise: 120 dB
• Input Impedance: 10 kΩ
• Output Swing: 55 mV too 900 mV RMS

Features

• Integrated shut-down protection
• Integrated low-impedance output stages
• Continuous short circuit protection
• Adjustable gain
• Low quiescent current
• Integrated thermal protection

Application Field

The LM48861TM/NOPB is a highly integrated audio amplifier designed for low power applications. It can be used for headset and hands-free audio applications, as well as for driving small speakers in portable audio systems. It can also be used as an output amplifier in small sound systems, such as amplifiers for desktop PCs, notebooks, portable media players, and other consumer audio applications. In addition, it can be used as an input amplifier in professional audio systems, such as PA systems, instrument amplifiers, speaker prototypes, and medical systems.

Working Principle

The LM48861TM/NOPB is a highly integrated audio amplifier with very low quiescent current, making it an ideal choice for low power applications. It is designed to be self-contained, requiring only an input signal and an appropriately sized power supply. The amplifier is based on a switching current buffer architecture and combines the input stage, power stage, output buffering, and power supply generation in one package. The amplifier has a gain-setting resistor, allowing the user to set the desired gain level by selecting the appropriate resistor value. The amplifier is capable of driving speakers up to 8 ohms, while providing very low distortion, excellent noise performance, and superior battery life.

The LM48861TM/NOPB features shut-down protection, with an output voltage that ramps slowly to prevent large turn-on transients. The amplifier also features low-impedance output stages, which allow the amplifier to drive low-impedance loads, while maintaining excellent sound quality. In addition, the amplifier features continuous short circuit protection, integrated thermal protection, and adjustable gain. The amplifier is packaged in an MSOP-8, allowing for low-profile design for portable audio systems.

Conclusion

The LM48861TM/NOPB is a highly integrated, low-power audio amplifier designed for portable audio applications. It is easy to use and requires only a small amount of external components. It is capable of driving a wide range of loads, making it an ideal choice for low-power applications such as headsets and portable audio systems. It also features excellent noise performance and battery life, making it a great choice for audio applications in noisy environments. Finally, it features integrated shut-down protection, low impedance outputs, and adjustable gain, making it an ideal solution for low power audio applications.

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