The LM4901LD/NOPB is an audio power amplifier designed by Texas Instruments to meet the needs of modern portable electronics. This device is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5V DC power supply, making it an ideal choice for applications where high-quality audio output and efficiency are paramount.

Key Features

• Output Power: Delivers 1W into an 8Ω load at 5V supply.
• Power Efficiency: Operates with 90% efficiency at 1W into 8Ω, maximizing battery life in portable applications.
• Low Shutdown Current: Ultra-low shutdown current of 0.1µA helps in preserving battery life when the amplifier is not in use.
• THD+N: Less than 1% total harmonic distortion plus noise ensures high-fidelity audio playback.
• Package: Available in a space-saving 9-bump micro SMD package, perfect for compact devices.

Applications

The LM4901LD/NOPB is versatile and can be used in a variety of applications where audio quality and power efficiency are crucial. These include:

• Mobile Phones
• PDAs
• Portable Media Players
• Laptop and Desktop Computers
• Portable Gaming Devices

Advanced Specifications

The device features a low quiescent current of 4mA at a 5V supply and a wide supply voltage range from 2.2V to 5.5V, which allows for flexible design options. The LM4901LD/NOPB also includes a shutdown function that can be activated via a logic signal, allowing the amplifier to enter a low-power standby mode.

Quality and Reliability

As with all Texas Instruments products, the LM4901LD/NOPB is built with the commitment to quality and reliability. It is designed to operate over a temperature range of -40°C to 85°C, making it suitable for a wide range of environmental conditions. The "NOPB" designation indicates that this product is offered in a lead-free package, aligning with environmental standards and regulations.