LM4868MTE/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Audio Power Amplifier

Characteristics: - High efficiency - Low distortion - Wide supply voltage range - Thermal shutdown protection - Short-circuit and overvoltage protection

Package: Surface Mount Technology (SMT)

Essence: The LM4868MTE/NOPB is a mono audio power amplifier IC designed for portable devices such as smartphones, tablets, and portable media players.

Packaging/Quantity: The LM4868MTE/NOPB is available in a small outline package (SOT-23) and is typically sold in reels of 3000 units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1W
• Total Harmonic Distortion (THD): <0.1%
• Efficiency: >85%
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4868MTE/NOPB has the following pin configuration:

___________ | | IN+ |1 6| VDD IN- |2 5| SHUTDOWN GND |3 4| OUT |___________|

Functional Features

1. High Efficiency: The LM4868MTE/NOPB utilizes advanced circuitry to achieve high efficiency, resulting in longer battery life for portable devices.
2. Low Distortion: With a THD of less than 0.1%, the LM4868MTE/NOPB ensures high-quality audio reproduction.
3. Wide Supply Voltage Range: The IC can operate from a supply voltage as low as 2.7V, making it suitable for battery-powered applications.
4. Thermal Shutdown Protection: The LM4868MTE/NOPB includes a built-in thermal shutdown feature that protects the IC from overheating.
5. Short-Circuit and Overvoltage Protection: The IC is equipped with short-circuit and overvoltage protection to safeguard against potential damage.

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life - Low distortion ensures high-quality audio output - Wide supply voltage range allows for versatile application - Built-in protection features enhance reliability

Disadvantages: - Limited output power (up to 1W) - Mono configuration may not be suitable for stereo applications

Working Principles

The LM4868MTE/NOPB operates as a class D amplifier, which uses pulse-width modulation (PWM) to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to produce the final audio output. The class D architecture enables high efficiency by minimizing power dissipation.

Detailed Application Field Plans

The LM4868MTE/NOPB is commonly used in portable electronic devices where space and power efficiency are crucial. Some specific application fields include:

1. Smartphones: The IC can be integrated into smartphones to enhance the audio quality of multimedia content.
2. Tablets: Tablets can benefit from the LM4868MTE/NOPB's compact size and low power consumption, improving the audio experience for users.
3. Portable Media Players: The IC can be utilized in portable media players to deliver clear and powerful audio output.

Detailed and Complete Alternative Models

1. LM4868MT/NOPB: Similar to the LM4868MTE/NOPB, but available in a through-hole package (TO-220).
2. LM4868M: A mono audio power amplifier IC with similar specifications, but without the thermal shutdown protection feature.
3. LM4869MTE/NOPB: A stereo audio power amplifier IC designed for portable devices, offering higher output power and stereo capability.

Note: This is not an exhaustive list of alternative models, but provides a few examples.

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