LM4865MX/NOPB

Product Overview

• Category: Audio Amplifier
• Use: LM4865MX/NOPB is a mono audio amplifier designed for portable devices such as mobile phones, tablets, and portable media players.
• Characteristics: It provides high-quality audio amplification with low power consumption, making it suitable for battery-powered applications. The device operates on a single supply voltage and offers a compact package for space-constrained designs.
• Package: LM4865MX/NOPB is available in a small outline integrated circuit (SOIC) package.
• Essence: This audio amplifier enhances the audio signals from portable devices, delivering improved sound quality to the user.
• Packaging/Quantity: The LM4865MX/NOPB is typically sold in reels of 2500 units.

Specifications

• Power Supply Voltage: 2.7V - 5.5V
• Output Power: 1.1W (typical) into 8Ω at 5V
• Total Harmonic Distortion + Noise: 0.2% (typical) at 1kHz, 1W into 8Ω
• Shutdown Current: 0.6μA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4865MX/NOPB has a total of 8 pins:

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

Functional Features

• Low Power Consumption: The LM4865MX/NOPB operates on a low supply voltage and consumes minimal power, making it ideal for battery-powered devices.
• High-Quality Audio Amplification: It provides high-fidelity audio amplification, enhancing the sound quality of portable devices.
• Shutdown Control: The shutdown pin allows for power-saving operation when the amplifier is not in use.
• Thermal Shutdown Protection: The device incorporates thermal shutdown protection to prevent damage from excessive heat.

Advantages and Disadvantages

Advantages: - Low power consumption - High-quality audio amplification - Compact package size - Shutdown control for power-saving

Disadvantages: - Limited output power compared to higher wattage amplifiers - Single-channel (mono) output only

Working Principles

The LM4865MX/NOPB is a class AB audio amplifier that amplifies the audio signals received from the input. It utilizes a single supply voltage and employs internal gain settings to provide the desired amplification. The amplified audio signal is then delivered to the output pin, which can be connected to an external speaker or headphone.

Detailed Application Field Plans

The LM4865MX/NOPB is commonly used in various portable electronic devices, including:

1. Mobile Phones: Enhancing the audio output for better call quality and multimedia playback.
2. Tablets: Improving the sound experience during video playback and gaming.
3. Portable Media Players: Enhancing the audio output for music playback.

Detailed and Complete Alternative Models

• TPA3116D2: A stereo audio amplifier with higher output power and additional features.
• MAX98357A: A mono audio amplifier with integrated digital-to-analog converter (DAC).
• TDA7052: A low-power mono audio amplifier suitable for battery-powered applications.

Note: This is not an exhaustive list, and there are several alternative models available in the market.

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