LM4905LQ/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Low voltage audio power amplifier - Suitable for portable devices and battery-powered systems - Provides high-quality audio output with low distortion - Designed for driving small speakers or headphones

Package: QFN (Quad Flat No-Lead) package

Essence: The LM4905LQ/NOPB is a low voltage audio power amplifier IC that offers high-quality audio amplification for portable devices and battery-powered systems. It is specifically designed to drive small speakers or headphones, providing clear and distortion-free audio output.

Packaging/Quantity: The LM4905LQ/NOPB is available in a QFN package. The quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1W (at 5V supply voltage)
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical)
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4905LQ/NOPB has the following pin configuration:

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| | | LM4905LQ/NOPB | |_______________________________________| | | | 1 2 3 4 | | VDD IN+ IN- SHDN | | | |_______________________________________| | | | 5 6 7 8 | | GND OUT Bypass BYPASS | | | |_______________________________________| ```

Functional Features

• Low voltage operation allows for use in battery-powered devices
• High-quality audio output with low distortion for improved sound reproduction
• Shutdown mode for power-saving when not in use
• Bypass pin for direct connection to the input signal
• Small package size and low external component count for space-saving designs

Advantages and Disadvantages

Advantages: - Suitable for portable devices and battery-powered systems - Provides high-quality audio output with low distortion - Low shutdown current for power-saving - Small package size for space-saving designs

Disadvantages: - Limited output power compared to higher voltage amplifiers - May require additional components for certain applications

Working Principles

The LM4905LQ/NOPB is a low voltage audio power amplifier that operates by amplifying the input audio signal. It utilizes a class AB amplifier configuration to provide high-quality audio output with low distortion. The amplifier can be controlled using the SHDN pin, which allows for power-saving when the device is not in use.

Detailed Application Field Plans

The LM4905LQ/NOPB is commonly used in various portable audio devices and battery-powered systems. Some of its application fields include: - Mobile phones and smartphones - Portable media players - Tablets and laptops - Bluetooth speakers - Gaming consoles - Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

Some alternative models to the LM4905LQ/NOPB that offer similar functionality and features include: - LM4863LQ/NOPB - LM4889LQ/NOPB - TPA2005D1PWPR - MAX98306EWV+ - TS4990IST

These alternative models can be considered based on specific requirements and design considerations.

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