LM3421Q0MHX/NOPB

Overview

The LM3421Q0MHX/NOPB is an N-Channel controller designed for constant-current LED drivers, manufactured by Texas Instruments. It supports boost, buck, and SEPIC topologies with a single output capable of handling up to 5 A. The device operates within a supply voltage range of 4.5 V to 75 V and delivers output voltages between 3 V and 72 V. Switching frequencies are adjustable from 100 kHz to 2 MHz. It functions reliably in temperatures ranging from -40 °C to +125 °C and is housed in a 16-pin HTSSOP package.

Feature Summary

• Supports multiple converter topologies including boost, buck, and SEPIC configurations for flexible LED driver designs.
• Provides analog and PWM dimming capabilities for precise light control.
• Includes thermal shutdown protection to safeguard the component during overheating events.

Applications

• Automotive exterior lighting systems
• Automotive interior illumination modules
• General solid-state lighting applications

Procurement Notes

Verify the specific suffix 'Q0' against official Texas Instruments documentation to confirm automotive qualification status and exact electrical tolerances. Ensure the HTSSOP-16 package variant matches the intended PCB footprint. Cross-reference the datasheet revision date to ensure compliance with current RoHS standards and material declarations before finalizing procurement orders.

Selection Notes

Select this component when designing high-power LED drivers requiring support for buck, boost, or SEPIC architectures. It is suitable for applications demanding wide input voltage ranges and adjustable switching frequencies up to 2 MHz. Consider the 16-pin HTSSOP package for space-constrained layouts requiring robust thermal performance in automotive environments.

Part Context

This part belongs to the LM3421 family of N-Channel controllers for constant-current LED drivers. It is related to variants such as LM3421MH/NOPB and LM3421Q1MHX/NOPB, which share similar core functionalities but may differ in automotive qualification levels or packaging options. The series is designed for reliable operation in demanding lighting applications.

Replacement Considerations

LM3421MH/NOPB

FAQ

What converter topologies does the LM3421Q0MHX/NOPB support?

It supports boost, buck, and SEPIC topologies for driving LEDs.

Is the switching frequency fixed or adjustable?

The switching frequency is adjustable, ranging from 100 kHz to 2 MHz.