LM4990MM/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power audio amplifier
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: The LM4990MM/NOPB is a high-quality 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 1W
• 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 LM4990MM/NOPB has the following pin configuration:

1. VDD: Power supply voltage input
2. GND: Ground reference
3. IN+: Positive audio input
4. IN-: Negative audio input
5. SHUTDOWN: Shutdown control input
6. BYPASS: Bypass capacitor connection
7. OUT: Audio output
8. VOUT: Output voltage reference

Functional Features

• Low power consumption
• High signal-to-noise ratio (SNR)
• Wide operating voltage range
• Short-circuit and thermal protection
• Shutdown mode for power saving

Advantages and Disadvantages

Advantages: - High-quality audio amplification - Low power consumption - Compact package size - Protection features ensure device longevity

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

Working Principles

The LM4990MM/NOPB is a class AB audio amplifier that utilizes a bridge-tied load (BTL) configuration. It amplifies the audio signal received at the input pins and delivers it to the output pin with minimal distortion and noise. The amplifier operates within a specified voltage range and provides protection against short-circuits and thermal issues.

Detailed Application Field Plans

The LM4990MM/NOPB is commonly used in portable electronic devices where high-quality audio amplification is required. Some potential application fields include:

1. Smartphones
2. Tablets
3. Portable media players
4. Bluetooth speakers
5. Gaming consoles

Detailed and Complete Alternative Models

• TPA3116D2: High-power audio amplifier with integrated digital-to-analog converter (DAC)
• MAX98357A: Low-power audio amplifier with I2S interface
• TDA7498E: Dual-channel audio amplifier with high output power

These alternative models offer different features and specifications, providing options for various audio amplification requirements.

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