LM4871M/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Small size - Low power consumption - High efficiency - Wide voltage range - Excellent audio quality

Package: SOP-8 (Small Outline Package)

Essence: The LM4871M/NOPB is a mono audio amplifier IC designed for portable electronic devices such as mobile phones, tablets, and portable media players. It provides high-quality audio amplification in a compact form factor.

Packaging/Quantity: The LM4871M/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Output Power: Up to 1W
• Efficiency: Up to 90%
• Total Harmonic Distortion (THD): <0.1%
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4871M/NOPB has the following pin configuration:

____ VDD | | GND IN- | | SHUTDOWN IN+ | | OUT BYP |____| BP

Functional Features

1. Low Power Consumption: The LM4871M/NOPB operates efficiently with low power consumption, making it ideal for battery-powered devices.
2. Wide Voltage Range: It can operate within a wide voltage range of 2.0V to 5.5V, providing flexibility in various applications.
3. Excellent Audio Quality: The IC delivers high-quality audio output with low distortion and noise, ensuring an immersive listening experience.
4. Shutdown Mode: The SHUTDOWN pin allows the amplifier to enter a low-power shutdown mode, reducing power consumption when not in use.
5. Short Circuit Protection: The LM4871M/NOPB incorporates short circuit protection to prevent damage to the IC and connected devices.

Advantages

• Compact size enables integration into small electronic devices.
• Low power consumption prolongs battery life.
• Wide voltage range allows for versatile applications.
• High efficiency minimizes energy waste.
• Excellent audio quality enhances user experience.
• Shutdown mode reduces power consumption during idle periods.
• Short circuit protection safeguards the IC and connected devices.

Disadvantages

• Limited output power compared to higher wattage amplifiers.
• Mono configuration restricts stereo sound reproduction.

Working Principles

The LM4871M/NOPB is a class AB audio amplifier that amplifies the input audio signal and drives a speaker or headphone. It utilizes a bridge-tied load (BTL) configuration to maximize power efficiency and minimize external component count. The IC operates by modulating the input audio signal onto a high-frequency carrier wave, which is then amplified and filtered to produce the desired audio output.

Application Field Plans

The LM4871M/NOPB finds applications in various portable electronic devices, including: - Mobile phones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles - Personal digital assistants (PDAs)

Alternative Models

1. TPA3116D2: A higher-powered audio amplifier IC suitable for home audio systems.
2. MAX98357A: An ultra-low-power audio amplifier IC designed for wearable devices.
3. TAS5720: A digital input audio amplifier IC with advanced audio processing features.

These alternative models offer different specifications and features, catering to specific application requirements.

In conclusion, the LM4871M/NOPB is a compact and efficient audio amplifier IC designed for portable electronic devices. Its low power consumption, wide voltage range, and excellent audio quality make it an ideal choice for various applications. However, its limited output power and mono configuration may restrict its use in certain scenarios.