LM4875M/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High audio quality - Low power consumption - Small package size - Wide supply voltage range - Thermal shutdown protection

Package: 8-Pin SOIC (Small Outline Integrated Circuit)

Essence: The LM4875M/NOPB is a high-performance audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4875M/NOPB is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.1W (typical) into 8Ω load at 5V supply
• Total Harmonic Distortion + Noise (THD+N): 0.1% (typical) at 1kHz, 1W output power
• Shutdown Current: 0.01μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4875M/NOPB has the following pin configuration:

```

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| | --| VDD GND|-- Pin 1: Ground (GND) --| IN+ SHDN|-- Pin 2: Shutdown (SHDN) --| IN- OUT|-- Pin 3: Output (OUT) --| BP VDD|-- Pin 4: Positive Power Supply (VDD) --| BYPASS NC |-- Pin 5: Bypass Capacitor (BYPASS) --| VDD GND|-- Pin 6: Ground (GND) --| IN- OUT|-- Pin 7: Output (OUT) --| IN+ SHDN|-- Pin 8: Shutdown (SHDN) |___________| ```

Functional Features

• High audio quality with low distortion and noise
• Thermal shutdown protection to prevent overheating
• Low power consumption for extended battery life
• Wide supply voltage range allows compatibility with various power sources
• Bypass capacitor pin for improved audio performance

Advantages and Disadvantages

Advantages: - High audio quality ensures clear and accurate sound reproduction - Low power consumption extends battery life in portable devices - Small package size enables compact designs - Wide supply voltage range provides flexibility in power source selection - Thermal shutdown protection prevents damage due to overheating

Disadvantages: - Limited output power may not be suitable for high-power audio applications - Requires external components for proper operation - Sensitive to electromagnetic interference (EMI) due to its small package size

Working Principles

The LM4875M/NOPB is a class AB audio power amplifier that amplifies the audio signal received from an input source. It operates by converting the low-level audio signal into a higher power output suitable for driving speakers or headphones. The amplifier utilizes a combination of analog circuitry and feedback mechanisms to ensure accurate and faithful sound reproduction.

Detailed Application Field Plans

The LM4875M/NOPB is commonly used in various portable electronic devices, including: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming consoles - Personal digital assistants (PDAs)

Detailed and Complete Alternative Models

1. TPA3116D2: Class D audio amplifier with higher output power and efficiency.
2. MAX98357A: Integrated audio amplifier with built-in digital-to-analog converter (DAC).
3. TDA7492: Stereo audio amplifier with higher output power and multiple input options.

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

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