LM3402HVMM

Overview

The LM3402HVMM is a constant current buck LED driver IC manufactured by Texas Instruments, designed for driving high-power LEDs. It operates with an input voltage range of 6V to 75V and delivers a regulated output current of 500mA per channel. The device supports PWM dimming control and features an internal switch with a switching frequency up to 1MHz. It provides a maximum output voltage of 73V and functions within a junction temperature range of -40°C to 125°C. The component is housed in an 8-VSSOP surface-mount package.

Feature Summary

• Integrates an internal power switch for compact buck regulator topology
• Supports precise PWM dimming for brightness control applications
• Maintains constant current regulation across wide input voltage ranges

Applications

• General LED lighting systems
• High-power LED driver circuits
• Buck converter based illumination designs

Procurement Notes

Verify the specific ordering suffix when sourcing replacements, as the LM3402HVMM/NOPB represents the lead-free variant. Confirm that the original part status is obsolete and requires substitution planning. Ensure the replacement matches the 8-VSSOP package dimensions and electrical specifications for direct integration into existing PCB layouts without redesign.

Selection Notes

Select this component for applications requiring a single-channel constant current source with high input voltage tolerance. The integrated switch simplifies design by reducing external component count compared to discrete solutions. Consider the 500mA output limit and 73V max output voltage when sizing the LED string. The wide operating temperature range suits diverse environmental conditions.

Part Context

This part belongs to the LM3402HV series of LED drivers from Texas Instruments. It is specifically engineered for high-voltage input applications where efficient step-down conversion is required. The series focuses on providing reliable constant current regulation for high-power LED arrays in industrial and commercial lighting sectors.

Replacement Considerations

The LM3402HVMM/NOPB is the confirmed direct substitute. Verify RoHS compliance status differences between the legacy and NOPB versions.