LM4667MM/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - High-quality audio amplification - Low power consumption - Small form factor - Wide operating voltage range

Package: Miniature 8-pin MSOP package

Essence: The LM4667MM/NOPB is a high-performance audio amplifier IC designed for various portable audio applications.

Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1.2W
• Total Harmonic Distortion (THD): Less than 0.1%
• Shutdown Current: Less than 1µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM4667MM/NOPB has the following pin configuration:

1. SHUTDOWN: Controls the amplifier's shutdown mode.
2. IN+: Positive input terminal for the audio signal.
3. IN-: Negative input terminal for the audio signal.
4. GND: Ground reference for the amplifier.
5. VDD: Positive supply voltage.
6. BYPASS: Bypass capacitor connection for improved stability.
7. OUT-: Negative output terminal.
8. OUT+: Positive output terminal.

Functional Features

• Single-ended or differential input operation
• Built-in thermal shutdown protection
• Short-circuit and overcurrent protection
• Pop and click suppression during power-on/off transitions
• External gain setting capability

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Compact size - Wide operating voltage range allows for flexibility in power source selection

Disadvantages: - Limited output power compared to higher wattage amplifiers - Requires external components for full functionality

Working Principles

The LM4667MM/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the input audio signal and provides a higher power output suitable for driving speakers or headphones.

The amplifier operates by modulating the input audio signal onto a high-frequency carrier wave, which is then amplified and filtered to produce the desired audio output. The LM4667MM/NOPB incorporates various protection mechanisms to ensure safe operation and prevent damage to the amplifier and connected devices.

Detailed Application Field Plans

The LM4667MM/NOPB is commonly used in portable audio devices such as: - Mobile phones - MP3 players - Portable gaming consoles - Personal digital assistants (PDAs) - Bluetooth speakers

Its compact size, low power consumption, and high-quality audio amplification make it an ideal choice for these applications.

Detailed and Complete Alternative Models

1. LM4861MM/NOPB: Similar audio amplifier IC with lower output power but lower cost.
2. LM4889MM/NOPB: Higher output power audio amplifier IC with similar characteristics and package.
3. TPA3110D2PWPR: Class D audio amplifier IC with higher efficiency and lower power consumption.

These alternative models offer different features and specifications, allowing designers to choose the most suitable option based on their specific requirements.

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