LM4917SD/NOPB

Audio Amplifiers Overview

The LM4917SD/NOPB is a stereo audio power amplifier manufactured by Texas Instruments, belonging to the Boomer series. It operates as a Class AB amplifier designed for low-voltage applications with a supply voltage range of 1.4V to 3.6V. The device delivers up to 95mW per channel into a 16-ohm load and features integrated pop-and-click suppression, short-circuit protection, and thermal shutdown. It is housed in a compact 14-WSON (4x3mm) package suitable for portable electronics.

Audio Amplifiers Feature Summary

• Integrated pop-and-click suppression circuitry minimizes audible noise during power-up and power-down sequences.
• Built-in short-circuit protection and thermal shutdown mechanisms safeguard the device under fault conditions.
• Supports low-voltage operation ranging from 1.4V to 3.6V, enabling compatibility with single-cell battery systems.

Audio Amplifiers Applications

• Portable media players
• Mobile phones
• Personal digital assistants

Audio Amplifiers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as this specific part number may be discontinued. Ensure the ordering suffix matches the required packaging configuration before finalizing procurement orders.

Audio Amplifiers Selection Notes

Select this component for designs requiring high efficiency in small form factors. Evaluate thermal performance based on PCB copper area availability, as heat dissipation relies heavily on the exposed pad. Consider the operating voltage range to ensure compatibility with the system's power source constraints.

Audio Amplifiers Part Context

This component is part of the National Semiconductor Boomer family, now managed by Texas Instruments following acquisition. It represents a legacy solution for stereo audio amplification in ultra-low voltage environments, prioritizing minimal external component count and robust protection features for consumer mobile devices.

Audio Amplifiers Replacement Considerations

Check for LM4917MTX/NOPB for TSSOP-14 package variants. Verify functional equivalence with other Boomer series stereo amplifiers if pinout compatibility is not strictly required.