LM3424MH/NOPB

Overview

The LM3424MH/NOPB is a constant current N-channel controller designed for LED lighting applications. It supports Boost, Buck, Flyback, and SEPIC topologies with an input voltage range of 4.5 V to 75 V. The device delivers up to 5 A output current in a 20-lead HTSSOP package. Operating frequencies are adjustable from 100 kHz to 2 MHz. It features analog and PWM dimming capabilities along with thermal foldback protection. The component operates within a temperature range of -40°C to +125°C.

Feature Summary

• Supports multiple converter topologies including Boost, Buck, Flyback, and SEPIC for flexible LED driver designs.
• Integrates analog and PWM dimming controls for precise light intensity management.
• Includes thermal foldback protection to maintain safe operating conditions under high load or temperature.
• Provides constant current regulation with adjustable output settings for various LED string configurations.

Applications

• High-power LED general illumination systems
• Automotive exterior lighting modules
• Industrial area lighting fixtures
• Architectural accent lighting drivers

Procurement Notes

Verify the specific suffix 'MH' corresponds to the HTSSOP-20 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected supplier provides valid traceability records for automotive or industrial qualification requirements. Cross-reference the datasheet revision date to guarantee compatibility with latest design guidelines and application notes.

Selection Notes

Select this component for designs requiring wide input voltage ranges up to 75 V and high output currents near 5 A. The adjustable switching frequency allows optimization for passive component size versus efficiency trade-offs. Consider the thermal performance characteristics of the HTSSOP-20 package for PCB layout planning. Evaluate the need for external N-channel FETs capable of handling the specified current levels and voltage stresses.

Part Context

Part of the Texas Instruments LM3424 family of LED lighting driver ICs. Designed specifically for driving high-power LEDs in various power supply architectures. Complements other PMIC solutions by focusing on dedicated constant current regulation for lighting applications.

Replacement Considerations

Consult official substitution lists for pin-compatible alternatives if available. Verify electrical parameter equivalence for input voltage, current capacity, and switching frequency before replacing.