LM4871N

Product Overview

Belongs to: Integrated Circuits (ICs)
Category: Audio Amplifiers
Use: LM4871N is a mono, bridged audio power amplifier that is designed for use in low voltage consumer applications. It is commonly used in portable devices such as mobile phones, tablets, and portable media players.
Characteristics: The LM4871N is known for its low quiescent current, low distortion, and high efficiency. It comes in a small outline package, making it suitable for space-constrained designs.
Package: The LM4871N is available in an 8-pin SOIC (Small Outline Integrated Circuit) package.
Essence: This amplifier is essential for providing high-quality audio output in battery-powered devices.
Packaging/Quantity: Typically packaged in reels of 2500 units.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Output Power: 750mW at 3.6V, 10% THD+N, 32Ω Load
• Shutdown Current: 0.01μA (typical)
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)

Detailed Pin Configuration

The LM4871N has the following pin configuration: 1. IN-: Negative Input 2. IN+: Positive Input 3. GND: Ground 4. VDD: Supply Voltage 5. SHDN: Shutdown 6. OUT-: Negative Output 7. OUT+: Positive Output 8. BYPASS: Bypass Capacitor Connection

Functional Features

• Low Quiescent Current
• Differential Inputs
• Thermal Shutdown Protection
• Short-Circuit and Thermal Protection

Advantages and Disadvantages

Advantages: - Low power consumption - Small form factor - Built-in protection features

Disadvantages: - Limited output power compared to some higher voltage amplifiers - Requires an external bypass capacitor for optimal performance

Working Principles

The LM4871N operates by amplifying the input audio signal and delivering it to the connected load (e.g., a speaker or headphones). It utilizes a bridge-tied load (BTL) configuration to maximize power efficiency and minimize distortion.

Detailed Application Field Plans

The LM4871N is well-suited for various low-voltage audio amplification applications, including: - Mobile Phones - Tablets - Portable Media Players - Bluetooth Speakers - Wearable Devices

Detailed and Complete Alternative Models

Some alternative models to LM4871N include: - TPA2012D2 from Texas Instruments - MAX98306 from Maxim Integrated - TS4990 from STMicroelectronics

In conclusion, the LM4871N is a versatile audio power amplifier designed for low voltage applications, offering high efficiency and low distortion. Its compact size and essential features make it an ideal choice for portable electronic devices.

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