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LM4871MM/NOPB

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.

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  1. What is the LM4871MM/NOPB?

    • The LM4871MM/NOPB is a mono, bridged audio power amplifier designed for use in portable electronic devices.
  2. What is the typical application of the LM4871MM/NOPB?

    • The LM4871MM/NOPB is commonly used to drive small speakers or headphones in portable audio devices such as smartphones, tablets, and portable media players.
  3. What is the maximum output power of the LM4871MM/NOPB?

    • The LM4871MM/NOPB can deliver up to 1 watt of continuous average power into an 8-ohm load.
  4. What is the supply voltage range for the LM4871MM/NOPB?

    • The LM4871MM/NOPB operates from a single supply voltage ranging from 2.7V to 5.5V.
  5. Does the LM4871MM/NOPB require external components for operation?

    • Yes, the LM4871MM/NOPB requires a few external components such as input capacitors, feedback resistors, and output capacitors for proper operation.
  6. What is the typical efficiency of the LM4871MM/NOPB?

    • The typical efficiency of the LM4871MM/NOPB is around 85% when driving an 8-ohm load.
  7. Is the LM4871MM/NOPB suitable for battery-powered applications?

    • Yes, the LM4871MM/NOPB's low supply voltage requirement and high efficiency make it well-suited for battery-powered applications.
  8. Can the LM4871MM/NOPB be used in stereo applications?

    • While the LM4871MM/NOPB is a mono amplifier, multiple units can be used to create a stereo audio system.
  9. What are the key features of the LM4871MM/NOPB?

    • The LM4871MM/NOPB features low quiescent current, shutdown mode, thermal shutdown protection, and short-circuit protection.
  10. Where can I find the complete datasheet for the LM4871MM/NOPB?

    • The complete datasheet for the LM4871MM/NOPB can be found on the manufacturer's website or distributor's documentation repository.