LM4928TL/NOPB

Product Overview

Category: Audio Amplifier
Use: The LM4928TL/NOPB is a high-performance audio amplifier designed for use in portable electronic devices such as smartphones, tablets, and portable media players.
Characteristics: It offers high efficiency, low power consumption, and small package size.
Package: The LM4928TL/NOPB comes in a tiny 25-bump DSBGA package.
Essence: This audio amplifier is essential for delivering high-quality sound in compact electronic devices.
Packaging/Quantity: The LM4928TL/NOPB is typically available in reels of 2500 units.

Specifications

• Output Power: 1.35W per channel into 8Ω at 5V
• Total Harmonic Distortion + Noise (THD+N): 0.15% at 1kHz, 1.2W into 8Ω
• Efficiency: Up to 85%
• Supply Voltage Range: 2.7V to 5.5V
• Shutdown Current: 0.1μA (typical)

Detailed Pin Configuration

The LM4928TL/NOPB features a 25-bump DSBGA package with specific pin configurations for input, output, power supply, and control signals. A detailed pinout diagram can be found in the product datasheet.

Functional Features

• Integrated charge pump for driving Class D speaker
• Click-and-pop suppression
• Thermal shutdown and overcurrent protection
• I2C volume control

Advantages and Disadvantages

Advantages: - High efficiency - Low power consumption - Small package size - Integrated charge pump for driving speakers

Disadvantages: - Limited output power compared to larger amplifiers - Requires careful PCB layout due to high-frequency switching nature

Working Principles

The LM4928TL/NOPB operates on the principle of converting the digital audio signal into an amplified analog signal using a Class D amplifier topology. It utilizes a charge pump to drive the speaker, achieving high efficiency and low power consumption.

Detailed Application Field Plans

The LM4928TL/NOPB is ideal for use in portable electronic devices where space and power efficiency are critical. It can be integrated into smartphones, tablets, portable media players, and other handheld devices to deliver high-quality audio output.

Detailed and Complete Alternative Models

• LM48901: A similar audio amplifier with higher output power and different package options.
• LM4863: An alternative audio amplifier with lower power consumption and different feature set.

In conclusion, the LM4928TL/NOPB is a high-performance audio amplifier designed for portable electronic devices, offering high efficiency, low power consumption, and compact packaging. Its functional features, advantages, and application field plans make it a suitable choice for designers looking to enhance the audio capabilities of their portable products.