LM4990ITLX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power audio amplifier
• Package: Thin SOT-23 package
• Essence: Provides high-quality audio amplification in a compact form factor
• Packaging/Quantity: Available in tape and reel packaging, quantity depends on customer requirements

Specifications

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

Pin Configuration

The LM4990ITLX/NOPB has the following pin configuration:

```

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| | | _______________ | | | | | | VDD ---|1 6|--- OUT | | GND ---|2 5|--- IN- | | IN+ ---|3 4|--- SHUTDOWN |____________|_______________|__________| ```

Functional Features

• Low power consumption
• Wide operating voltage range
• Thermal shutdown protection
• Short-circuit and over-temperature protection
• Pop and click suppression during power-up and shutdown

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Compact form factor - Low power consumption - Protection features for reliable operation

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

Working Principles

The LM4990ITLX/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the input audio signal and delivers it to the output with minimal distortion. The amplifier operates in a low-power mode when no audio signal is present, reducing power consumption.

Detailed Application Field Plans

The LM4990ITLX/NOPB is suitable for various portable audio applications, including:

1. Mobile phones
2. Portable media players
3. Tablets
4. Laptop computers
5. Bluetooth speakers

Its compact size and low power consumption make it ideal for these portable devices where space and battery life are critical factors.

Detailed and Complete Alternative Models

• TPA3116D2: High-performance audio amplifier with higher output power
• MAX98357A: Class D audio amplifier with integrated digital-to-analog converter (DAC)
• TDA7498E: Dual BTL class D audio amplifier with high output power

These alternative models offer different features and capabilities, allowing designers to choose the most suitable amplifier for their specific application requirements.

In conclusion, the LM4990ITLX/NOPB is a high-quality, low-power audio amplifier designed for portable audio applications. Its compact size, low power consumption, and protection features make it an excellent choice for various portable devices. Designers can also consider alternative models depending on their specific needs.