LM4879SD/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Amplifier

Characteristics: - Small size - Low power consumption - High efficiency - Wide voltage range - Excellent audio quality

Package: SDIP (Shrink Dual In-Line Package)

Essence: The LM4879SD/NOPB is a high-performance audio amplifier IC designed for portable electronic devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4879SD/NOPB is available in a standard SDIP package. It is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1.1W per channel
• Total Harmonic Distortion (THD): <1%
• Efficiency: >85%
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4879SD/NOPB has a total of 8 pins arranged as follows:

```

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| | --| VDD GND|-- Pin 1: Ground --| IN+ SHDN|-- Pin 2: Shutdown Control --| IN- OUT|-- Pin 3: Audio Output --| BP VDD|-- Pin 4: Positive Power Supply |___________| ```

Functional Features

1. High-Quality Audio Amplification: The LM4879SD/NOPB provides excellent audio amplification with low distortion, ensuring clear and crisp sound reproduction.
2. Low Power Consumption: Designed for portable devices, the LM4879SD/NOPB operates efficiently with minimal power consumption, extending battery life.
3. Wide Voltage Range: The IC can operate within a wide voltage range, making it suitable for various battery-powered applications.
4. Shutdown Control: The SHDN pin allows the amplifier to be easily turned on or off, conserving power when not in use.
5. Thermal and Short Circuit Protection: The LM4879SD/NOPB incorporates built-in protection mechanisms to prevent damage from overheating or short circuits.

Advantages

• Compact size enables integration into small electronic devices.
• High efficiency results in longer battery life.
• Wide voltage range allows for versatile application possibilities.
• Excellent audio quality enhances the user experience.
• Shutdown control feature helps conserve power when not in use.

Disadvantages

• Limited output power compared to larger audio amplifiers.
• May require additional external components for certain applications.
• Not suitable for high-power audio systems.

Working Principles

The LM4879SD/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 connected speaker or headphone. The amplifier operates by modulating the input signal using a combination of transistors and resistors, resulting in amplified sound output.

Application Field Plans

The LM4879SD/NOPB is widely used in portable electronic devices where space and power consumption are critical factors. Some common applications include:

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

Alternative Models

1. TPA301DGNR: Similar audio amplifier IC with higher output power capability.
2. MAX98306EWV+: Audio amplifier IC with integrated digital volume control.
3. TS4990IST: Low-power audio amplifier IC with shutdown control and thermal protection features.

These alternative models offer similar functionality and can be considered as substitutes for the LM4879SD/NOPB in various applications.

In conclusion, the LM4879SD/NOPB is a compact and efficient audio amplifier IC designed for portable electronic devices. Its high-quality audio amplification, low power consumption, and wide voltage range make it an ideal choice for enhancing the audio experience in smartphones, tablets, and other portable media devices.