LM3875T

Product Overview

Category: Integrated Circuit (IC)
Use: Audio Power Amplifier
Characteristics: High-performance, high-fidelity audio amplification
Package: TO-220-11
Essence: Single-channel audio power amplifier
Packaging/Quantity: Tube packaging, 50 units per tube

Specifications

Power Supply Voltage: ±20V to ±84V
Output Power: 56W (typical) into 8Ω load at ±38V supply voltage
Total Harmonic Distortion: 0.03% (typical) at 1kHz, 20W output power
Input Impedance: 22kΩ (typical)
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM3875T has a total of 11 pins:

Non-Inverting Input (+IN)
Inverting Input (-IN)
V- (Negative Power Supply)
Output
V+ (Positive Power Supply)
Mute
Standby
Thermal Pad
GND (Ground)
Bootstrap
Compensation

Functional Features

High-quality audio amplification with low distortion and noise
Wide power supply voltage range for flexibility in various applications
Built-in mute and standby modes for power management
Thermal protection to prevent overheating
Bootstrap and compensation pins for improved stability and performance

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low distortion and noise - Wide power supply voltage range - Power management features - Thermal protection

Disadvantages: - Limited to single-channel audio amplification - Requires external components for complete circuit implementation

Working Principles

The LM3875T is a single-channel audio power amplifier that amplifies low-level audio signals to drive speakers or headphones. It operates by receiving an input audio signal at the non-inverting and inverting inputs, which are then amplified and delivered to the output pin. The power supply voltage determines the output power, and the amplifier ensures low distortion and noise levels.

Detailed Application Field Plans

The LM3875T is commonly used in various audio applications, including:

Hi-Fi stereo systems
Home theater systems
Professional audio equipment
Car audio systems
Musical instrument amplifiers

Detailed and Complete Alternative Models

TDA7294: Audio Power Amplifier IC with similar specifications and features.
LM3886: High-performance Audio Power Amplifier IC with higher output power capability.
TPA3116D2: Class D Audio Power Amplifier IC with efficient power conversion.

These alternative models offer different performance characteristics and may be suitable for specific application requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM3875T v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LM3875T in technical solutions:

Q: What is LM3875T? A: LM3875T is a high-performance audio power amplifier integrated circuit (IC) designed for use in audio applications.
Q: What is the maximum output power of LM3875T? A: The maximum output power of LM3875T is typically around 56 watts into an 8-ohm load with a 35V power supply.
Q: Can LM3875T be used in stereo applications? A: Yes, LM3875T can be used in stereo applications by using two ICs, one for each channel.
Q: Is LM3875T suitable for both home and professional audio systems? A: Yes, LM3875T is suitable for both home and professional audio systems due to its high-quality sound reproduction capabilities.
Q: Does LM3875T require any external components for operation? A: Yes, LM3875T requires a few external components such as resistors, capacitors, and a power supply to function properly.
Q: Can LM3875T operate on a single power supply voltage? A: No, LM3875T requires a dual power supply configuration (+Vcc and -Vcc) for proper operation.
Q: What is the recommended power supply voltage range for LM3875T? A: The recommended power supply voltage range for LM3875T is typically between ±20V to ±35V.
Q: Does LM3875T have built-in thermal protection? A: Yes, LM3875T has built-in thermal protection that helps prevent overheating and damage to the IC.
Q: Can LM3875T drive low-impedance loads? A: Yes, LM3875T can drive low-impedance loads down to 4 ohms without significant distortion.
Q: Is LM3875T suitable for bridged amplifier configurations? A: Yes, LM3875T can be used in bridged amplifier configurations to increase the output power and drive capability.

Please note that these answers are general and may vary depending on specific application requirements and circuit design considerations.