LM4864M/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio amplifier
• Characteristics: Low voltage, low power consumption, small package size
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: LM4864M/NOPB is a mono audio amplifier designed for portable devices such as mobile phones, tablets, and portable media players.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Power Supply Voltage: 2.0V to 5.5V
• Output Power: 1 Watt (typical)
• Total Harmonic Distortion + Noise: 0.2% (typical)
• Shutdown Current: 0.6μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4864M/NOPB IC has the following pin configuration:

```

---

| | --| VDD GND|-- Pin 1: Power supply voltage (VDD) --| IN+ SHDN|-- Pin 2: Non-inverting input (+) --| IN- OUT|-- Pin 3: Inverting input (-) / Output --| BP BPS|-- Pin 4: Bypass capacitor connection --| BYP GND|-- Pin 5: Bypass capacitor connection --| VDD GND|-- Pin 6: Power supply voltage (VDD) --| IN+ SHDN|-- Pin 7: Non-inverting input (+) --| IN- OUT|-- Pin 8: Inverting input (-) / Output |___________| ```

Functional Features

• Mono audio amplifier with low voltage operation
• Low power consumption for extended battery life in portable devices
• Small package size allows for space-saving designs
• Shutdown mode for power saving when not in use
• Thermal shutdown protection to prevent overheating

Advantages and Disadvantages

Advantages: - Low voltage operation enables compatibility with various portable devices - Low power consumption extends battery life - Small package size facilitates compact device designs - Shutdown mode saves power when amplifier is not in use - Thermal shutdown protection prevents damage due to overheating

Disadvantages: - Limited output power compared to higher wattage amplifiers - Mono output limits stereo sound reproduction

Working Principles

The LM4864M/NOPB is a class AB audio amplifier that operates on a low voltage supply. It utilizes an internal gain setting resistor to provide a fixed gain of 20dB. The amplifier accepts audio input signals through the non-inverting input pin (IN+) and the inverting input pin (IN-). The amplified audio signal is then available at the output pin (OUT).

Detailed Application Field Plans

The LM4864M/NOPB is commonly used in portable electronic devices where space and power efficiency are crucial. Some potential application fields include:

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

Detailed and Complete Alternative Models

1. LM4863M/NOPB: Similar to LM4864M/NOPB but with stereo output capability.
2. LM4865M/NOPB: Higher power version of LM4864M/NOPB, capable of delivering up to 2 Watts of output power.
3. LM4866M/NOPB: Dual channel audio amplifier suitable for stereo applications.

These alternative models offer different features and capabilities to suit specific requirements.

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