LM4990ITL/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power audio amplifier
• Package: Thin Shrink Small Outline Package (TSSOP)
• Essence: The LM4990ITL/NOPB is a high-performance audio amplifier designed for portable devices such as smartphones, tablets, and portable media players.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Power Supply Voltage: 2.7V to 5.5V
• Output Power: Up to 1.1W
• Total Harmonic Distortion + Noise (THD+N): 0.1% at 1kHz, 0.5W
• Efficiency: Up to 90%
• Shutdown Current: 0.01μA (typical)

Pin Configuration

The LM4990ITL/NOPB has the following pin configuration:

1. VDD - Power supply voltage input
2. GND - Ground reference
3. IN+ - Non-inverting input
4. IN- - Inverting input
5. SHUTDOWN - Shutdown control input
6. BYPASS - Bypass capacitor connection
7. OUT - Amplifier output
8. VOUT - Output voltage sensing

Functional Features

• High-quality audio amplification with low distortion and noise
• Wide power supply voltage range for compatibility with various devices
• Low shutdown current for power-saving operation
• Thermal shutdown protection to prevent overheating
• Short-circuit and overcurrent protection for device safety

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Low power consumption - Compact package size - Wide power supply voltage range

Disadvantages: - Limited output power compared to larger audio amplifiers - Requires external components for proper operation

Working Principles

The LM4990ITL/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the audio signal received at the input and delivers it to the output with high fidelity. The amplifier operates in a low-power mode when no audio signal is present, reducing power consumption.

Detailed Application Field Plans

The LM4990ITL/NOPB is suitable for various portable audio applications, including:

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

Detailed and Complete Alternative Models

1. TPA3116D2 - Class D audio amplifier with higher output power
2. LM386 - Low-cost audio amplifier with lower power requirements
3. MAX9744 - Integrated audio amplifier with advanced features
4. TDA7297 - Dual-channel audio amplifier for stereo applications

These alternative models offer different specifications and features, providing options based on specific application requirements.

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