LM4990MH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power audio amplifier
• Package: PowerPAD HTSSOP-16
• Essence: The LM4990MH/NOPB is a high-performance audio amplifier designed for portable devices such as smartphones, tablets, and portable media players.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Power Supply Voltage: 2.7V to 5.5V
• Output Power: Up to 1.4W into 8Ω at 5V
• Total Harmonic Distortion + Noise: 0.1% (typical) at 1kHz, 1.2W into 8Ω
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4990MH/NOPB has the following pin configuration:

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Functional Features

• Low quiescent current consumption for extended battery life
• Excellent power supply rejection ratio (PSRR) for improved audio quality
• Thermal shutdown protection to prevent overheating
• Short-circuit and thermal overload protection for device safety
• Wide operating voltage range for compatibility with various power sources

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Compact package size - Protection features for enhanced reliability

Disadvantages: - Limited output power compared to larger amplifiers - Not suitable for high-power audio applications

Working Principles

The LM4990MH/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It operates by amplifying the input audio signal and driving it through a load, typically an 8Ω speaker. The amplifier's low quiescent current consumption ensures efficient power usage, making it ideal for portable devices.

Detailed Application Field Plans

The LM4990MH/NOPB can be used in various portable audio applications, including:

1. Smartphones and tablets
2. Portable media players
3. Bluetooth speakers
4. Gaming consoles
5. Personal digital assistants (PDAs)

Its compact size, low power consumption, and high-performance characteristics make it suitable for these applications, providing clear and amplified audio output.

Alternative Models

Here are some alternative models that offer similar functionality:

1. TPA3116D2 - Class D audio amplifier with higher output power
2. MAX98357A - Low-power audio amplifier with integrated digital-to-analog converter (DAC)
3. TDA7492 - Stereo audio amplifier with built-in volume control

These alternatives provide options for different requirements and design considerations.

In conclusion, the LM4990MH/NOPB is a high-performance audio amplifier designed for portable devices. Its compact size, low power consumption, and excellent audio quality make it a suitable choice for various applications. However, its limited output power may not be suitable for high-power audio needs.