LM3423Q1MHX/NOPB

Overview

The LM3423Q1MHX/NOPB is an N-channel controller for constant current LED drivers, designed for automotive applications. It supports Boost, Buck, and SEPIC topologies with a maximum output current of 5 A. The device operates within an input voltage range of 4.5 V to 75 V and features an adjustable switching frequency from 100 kHz to 2 MHz. It provides adjustable output voltage and supports both analog and PWM dimming. The component is housed in a 20-HTSSOP package and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Supports multiple converter topologies including Boost, Buck, and SEPIC for flexible LED driver design
• Enables precise LED brightness control through integrated analog and PWM dimming capabilities
• Includes built-in thermal shutdown protection to ensure safe operation under high-temperature conditions

Applications

• Automotive exterior lighting systems
• Automotive interior illumination circuits
• High-power LED driver designs requiring wide input voltage ranges

Procurement Notes

Verify the specific suffix Q1MHX/NOPB against the official Texas Instruments datasheet to confirm automotive qualification status and pinout compatibility. Ensure the ordering part number matches the exact package variant required for your PCB layout. Cross-reference the manufacturer's latest documentation to validate RoHS compliance and any recent product change notices affecting this specific revision.

Selection Notes

Select this component when designing LED drivers that require support for diverse power stages such as boost or buck converters. It is suitable for applications demanding a wide input voltage range up to 75 V. Consider its adjustable switching frequency range if electromagnetic interference management is critical. Verify that the 20-HTSSOP package fits your assembly constraints and thermal requirements.

Part Context

This part belongs to the LM3423 series of LED lighting drivers from Texas Instruments. The series includes various variants such as LM3423Q1MH and LM3423MHX. These controllers are specifically engineered for driving LEDs in automotive environments, offering robust performance and reliability standards required for vehicle electronics.

Replacement Considerations

LM3423Q1MH-NOPB

FAQ

What switching topologies does the LM3423 support?

The LM3423 supports Boost, Buck, and SEPIC converter topologies.

Does the LM3423 support PWM dimming?

Yes, the device supports both analog and PWM dimming methods.