LM1875T/LF03

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High-performance audio amplifier - Suitable for use in Hi-Fi stereo systems and home theaters - Provides high-quality sound reproduction with low distortion - Can drive speakers with impedance ranging from 4 to 8 ohms

Package: TO-220-5 (Through-Hole Package)

Essence: The LM1875T/LF03 is a power amplifier IC designed to deliver high-quality audio amplification for various applications.

Packaging/Quantity: Available in tubes or reels, with quantities varying based on manufacturer specifications.

Specifications

• Supply Voltage Range: ±16V to ±60V
• Output Power: Up to 30W
• Total Harmonic Distortion (THD): 0.015% (typical)
• Input Impedance: 150k ohms
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM1875T/LF03 has a 5-pin configuration:

1. Pin 1: Non-Inverting Input (+IN)
2. Pin 2: Inverting Input (-IN)
3. Pin 3: V- (Negative Power Supply)
4. Pin 4: V+ (Positive Power Supply)
5. Pin 5: Output (OUT)

Functional Features

• Wide supply voltage range allows flexibility in power supply selection.
• Low distortion ensures accurate sound reproduction.
• Thermal shutdown protection prevents damage due to excessive heat.
• Short-circuit protection safeguards the amplifier and connected speakers.
• Internal current limiting protects against overloading.

Advantages and Disadvantages

Advantages: - High-quality audio amplification with low distortion. - Versatile power supply options. - Built-in protection features enhance reliability. - Suitable for various audio applications.

Disadvantages: - Requires external components for a complete amplifier circuit. - Limited output power compared to some other power amplifier ICs.

Working Principles

The LM1875T/LF03 operates as a class AB audio power amplifier. It amplifies the input audio signal and drives the connected speakers with sufficient power to produce high-quality sound. The amplifier uses a combination of voltage and current feedback to achieve low distortion and accurate sound reproduction.

Detailed Application Field Plans

The LM1875T/LF03 is commonly used in the following applications:

1. Hi-Fi Stereo Systems: Provides high-fidelity audio amplification for home audio systems, ensuring excellent sound quality.
2. Home Theaters: Enhances the audio experience by delivering powerful and clear sound to multiple speakers.
3. Audio Equipment: Used in various audio devices such as amplifiers, preamplifiers, and audio mixers to amplify and enhance audio signals.

Detailed and Complete Alternative Models

1. TDA2030A: Similar audio power amplifier IC with comparable specifications and performance.
2. TDA7294: Higher-power audio amplifier IC suitable for applications requiring more output power.
3. LM3886: Another popular audio power amplifier IC known for its high-performance and low distortion characteristics.

These alternative models offer similar functionality and can be considered as alternatives to the LM1875T/LF03 based on specific application requirements.

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