LM3402MR/NOPB

Overview

The LM3402MR/NOPB is a constant current buck LED driver IC from Texas Instruments. It supports an input voltage range of 6V to 42V and delivers a regulated output current of 0.5A. The device operates with a switching frequency between 10kHz and 1MHz. It features PWM dimming capability for brightness control. The component is housed in an 8-SOIC PowerPAD package and functions within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrated internal power switch for compact design
• Supports high-frequency PWM dimming for flicker-free operation
• Constant current regulation ensures stable LED performance

Applications

• LED lighting systems
• General illumination applications
• Battery-powered lighting devices

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and thermal pad configuration. Ensure the selected variant matches the required input voltage range and package dimensions for the target PCB layout. Cross-reference manufacturer part numbers with distributor listings to avoid counterfeit components.

Selection Notes

Select this component when a non-isolated buck topology is required for single-string LED arrays. Consider the 42V input limit and 0.5A current rating during circuit design. Evaluate thermal management requirements due to the integrated switch, ensuring adequate copper area on the PCB for heat dissipation.

Part Context

This part belongs to the LM3402 family of LED drivers designed for efficient light emission. It utilizes a buck converter architecture to step down higher voltages to appropriate LED forward voltages. The device integrates protection features and precise current control mechanisms suitable for commercial and industrial lighting standards.

Replacement Considerations

• LM3402MRE/NOPB