LM49155TLX/NOPB

Product Overview

• Category: Audio Amplifier
• Use: The LM49155TLX/NOPB is a mono Class D audio amplifier designed for portable applications such as smartphones, tablets, and portable media players.
• Characteristics: It offers high efficiency, low power consumption, and excellent audio performance in a compact package.
• Package: The LM49155TLX/NOPB comes in a small 9-bump micro SMD package.
• Essence: This audio amplifier provides a cost-effective solution for portable devices that require high-quality audio output.

Specifications

• Power Supply Voltage: 2.5V to 5.5V
• Output Power: Up to 1.4W into 8Ω at 5V
• Efficiency: Up to 90%
• Total Harmonic Distortion + Noise (THD+N): 0.1% at 1kHz, 1.2W into 8Ω
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM49155TLX/NOPB has the following pin configuration:

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| | | _______________ | | | | | | VDD | | GND | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |_______________| | |_______________________________________| ```

Functional Features

• High efficiency Class D amplifier architecture
• Low power consumption
• Excellent audio performance with low distortion and noise
• Integrated shutdown control for power saving
• Thermal shutdown protection
• Short-circuit and overcurrent protection

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life in portable devices. - Compact package size allows for space-saving designs. - Excellent audio performance enhances the user experience.

Disadvantages: - Limited output power compared to larger audio amplifiers. - Requires an external power supply.

Working Principles

The LM49155TLX/NOPB is a Class D audio amplifier that uses pulse-width modulation (PWM) to amplify the audio signal. It converts the input audio signal into a series of high-frequency pulses, which are then filtered and amplified to drive the connected speaker or headphones. The Class D architecture ensures high efficiency by minimizing power dissipation.

Application Field Plans

The LM49155TLX/NOPB is suitable for various portable applications, including: - Smartphones - Tablets - Portable media players - Bluetooth speakers - Gaming devices

Alternative Models

• LM4863: Stereo Class AB Audio Amplifier
• LM386: Mono Audio Amplifier
• TPA3116D2: Stereo Class D Audio Amplifier
• MAX98357A: Mono Class D Audio Amplifier

These alternative models offer similar functionality and can be considered as alternatives to the LM49155TLX/NOPB based on specific application requirements.

In conclusion, the LM49155TLX/NOPB is a mono Class D audio amplifier designed for portable devices. It offers high efficiency, low power consumption, and excellent audio performance. With its compact package and cost-effective solution, it is well-suited for various portable applications.