LM4871MM/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

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

Package: Miniature 8-Pin MSOP (Micro Small Outline Package)

Essence: The LM4871MM/NOPB is a compact audio amplifier IC designed for portable electronic devices such as smartphones, tablets, and portable media players. It provides high-quality audio amplification in a small form factor.

Packaging/Quantity: The LM4871MM/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Output Power: 1.1W (typical) into 8Ω load at 5V supply
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical) at 1kHz, 1.0W output power
• Efficiency: 85% (typical) at 1kHz, 1.0W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4871MM/NOPB has the following pin configuration:

___________ | | IN+ |1 8| VDD IN- |2 7| SHUTDOWN GND |3 6| OUT BYP |4 5| IN |___________|

Functional Features

• Single-ended input
• Differential output
• Shutdown mode for power saving
• Thermal shutdown protection
• Short-circuit and over-temperature protection

Advantages and Disadvantages

Advantages: - Small size allows for integration into compact devices - Low power consumption prolongs battery life - High efficiency reduces heat dissipation - Wide voltage range enables compatibility with various power sources - Excellent audio performance delivers clear and immersive sound

Disadvantages: - Limited output power compared to larger amplifiers - May require additional components for certain applications

Working Principles

The LM4871MM/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the audio signal received at the input pins and drives a speaker or headphones connected to the output pin. The amplifier operates by modulating the input signal using a pair of complementary transistors, which ensures low distortion and high fidelity audio reproduction.

Detailed Application Field Plans

The LM4871MM/NOPB is widely used in portable electronic devices where space and power efficiency are crucial. Some common application fields include:

1. Smartphones and tablets
2. Portable media players
3. Bluetooth speakers
4. Gaming consoles
5. Wearable devices

Detailed and Complete Alternative Models

1. LM4861MM/NOPB - Similar features and specifications, but lower output power.
2. LM4881MM/NOPB - Higher output power and improved audio performance.
3. TPA3116D2 - Class D audio amplifier with higher efficiency and digital input options.

These alternative models offer different trade-offs in terms of power, size, and performance, allowing designers to choose the most suitable option for their specific requirements.

In conclusion, the LM4871MM/NOPB is a compact audio amplifier IC that provides high-quality audio amplification for portable electronic devices. Its small size, low power consumption, and excellent audio performance make it an ideal choice for various applications.