LM3448MA/NOPB

Overview

The LM3448MA/NOPB is a phase-dimmable offline LED driver manufactured by Texas Instruments. It integrates a power FET and operates in a buck topology to provide constant current output for LED loads. The device supports analog dimming and features an adjustable switching frequency ranging from 30 kHz to 1 MHz. It is housed in a 16-pin SOIC package and includes thermal shutdown protection. The IC is designed for non-isolated applications, offering line regulation solutions suitable for AC-DC conversion environments.

Feature Summary

• Integrates a high-side power FET for compact design
• Supports phase-cut dimming compatibility
• Features adjustable switching frequency for EMI optimization
• Includes thermal shutdown for enhanced reliability

Applications

• Non-isolated AC-DC LED lighting fixtures
• Phase-cut dimmable general illumination systems
• Offline LED driver designs requiring integrated FETs

Procurement Notes

Verify the specific suffix 'MA' against the manufacturer's latest datasheet to confirm pinout and electrical characteristics. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the 16-SOIC package dimensions with your PCB footprint library to guarantee mechanical fit. Confirm that the application voltage range aligns with the offline input specifications provided in the official documentation.

Selection Notes

Select this component for designs requiring an integrated power switch to reduce external BOM count. It is suitable for applications where phase-cut dimming functionality is mandatory. Consider the thermal performance of the SOIC-16 package when designing heat dissipation strategies. Verify that the adjustable frequency range meets the electromagnetic interference constraints of the final product enclosure.

Part Context

This part belongs to the LM344x series of LED drivers from Texas Instruments. The series focuses on offline, non-isolated topologies. The LM3448 variant specifically distinguishes itself by integrating the power FET, unlike earlier versions that required external switching components. This integration simplifies layout and improves efficiency in space-constrained lighting modules.

Replacement Considerations

LM3448MAX/NOPB is a documented substitute within the same family.