LM3402MM

Overview

The LM3402MM is a discontinued constant current buck LED driver IC from Texas Instruments. It regulates output current up to 500 mA with an input voltage range of 6 V to 75 V and supports PWM dimming. The device operates at switching frequencies between 10 kHz and 1 MHz, featuring an internal switch and adjustable output voltage up to 73 V. Designed for surface mount installation in an 8-VSSOP package, it functions within a temperature range of -40°C to +125°C TJ.

Feature Summary

• Integrated high-side N-channel power switch for simplified circuit design
• Constant current regulation capability for driving high-power LEDs
• Supports pulse-width modulation (PWM) dimming for brightness control

Applications

• General lighting applications
• Automotive lighting systems
• Industrial lighting fixtures

Procurement Notes

Verify component status carefully as the LM3402MM is officially listed as obsolete and no longer manufactured by Texas Instruments. Sourcing this specific part number may require checking secondary market distributors or surplus inventory providers rather than standard authorized channels. Ensure that any available units are genuine and stored under appropriate conditions to prevent degradation. Confirm compatibility with replacement alternatives before procurement decisions.

Selection Notes

Select the LM3402HVMM/NOPB as the primary alternative since the original model is discontinued. Consider the LM3402HVMRX/NOPB if a different package configuration is required for the application. Evaluate whether the HV variant's specifications meet the system requirements, as they share similar functional characteristics. Review datasheets for both replacements to ensure pinout and electrical parameter compatibility with existing designs.

Part Context

This component belongs to the LM3402 series of LED drivers designed for efficient power management in lighting systems. It utilizes a buck topology to step down voltage while maintaining constant current output. The series is known for its simplicity and reliability in driving high-power LEDs across various environments. As a legacy product, it represents an earlier generation of Texas Instruments' power management solutions for general and specialized lighting needs.

Replacement Considerations

LM3402HVMM/NOPB is confirmed as a direct substitute.