LM3402MM/NOPB

Overview

The LM3402MM/NOPB is a constant current buck LED driver IC from Texas Instruments, designed for driving high-power LEDs. It operates with an input voltage range of 6 V to 75 V and provides a regulated output current of 500 mA. The device supports PWM dimming and features an adjustable switching frequency from 10 kHz to 1 MHz. It utilizes a VSSOP-8 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated internal switch enables compact step-down topology design
• Supports precise PWM dimming control for light regulation
• Adjustable switching frequency allows optimization for efficiency and component size

Applications

• High-power LED lighting systems
• General illumination drivers
• Automotive exterior lighting applications

Procurement Notes

Verify the specific suffix MM against the official datasheet to confirm package type and RoHS compliance status. Confirm availability as the base part may be obsolete while the NOPB variant remains active. Ensure the ordering information matches the required thermal and electrical specifications for the target application.

Selection Notes

Select this component when a wide input voltage range up to 75 V is required for single or multiple series LED strings. The 500 mA output current rating suits medium-power LED loads. Consider the VSSOP-8 package for space-constrained designs requiring surface mount assembly.

Part Context

This part belongs to the LM3402 family of constant current buck regulators. The HV variant typically supports higher input voltages compared to standard versions. The NOPB suffix indicates lead-free and RoHS-compliant manufacturing, aligning with environmental standards for modern electronic components.

Replacement Considerations

LM3402HVMM/NOPB serves as a direct substitute with identical pinout and functionality but potentially different voltage ratings or packaging details. Verify electrical parameters and thermal performance before substitution.