LM3406HVQMHXQ1

Overview

The LM3406HVQMHXQ1 is a high-voltage, constant-current buck LED driver IC manufactured by Texas Instruments. It operates within an input voltage range of 6 V to 75 V and delivers a regulated output current of up to 1.5 A per channel. The device features an adjustable switching frequency from 10 kHz to 1 MHz and supports PWM dimming for brightness control. Packaged in a 14-HTSSOP with an exposed pad, it is qualified to AEC-Q100 standards for automotive applications and functions reliably across a junction temperature range of -40°C to +150°C.

Feature Summary

• High-voltage operation capability supporting input voltages up to 75 V
• Integrated internal power switch for simplified circuit design
• Precision constant current regulation with adjustable output current setting
• Supports both analog and pulse-width modulation dimming methods

Applications

• Automotive exterior lighting systems
• LED headlamp modules
• Fog lamp drivers
• General illumination requiring high input voltage tolerance

Procurement Notes

Verify the specific suffix 'X' indicates tape-and-reel packaging when ordering. Confirm that the Q1 designation aligns with required automotive qualification standards for the target application. Ensure the 14-HTSSOP package footprint matches the PCB layout constraints. Cross-reference the latest datasheet for any updates on recommended operating conditions or thermal management guidelines before finalizing procurement specifications.

Selection Notes

Select this component when the application demands high input voltage tolerance exceeding standard 42 V limits. It is suitable for designs requiring integrated switching without external MOSFETs. Consider the thermal performance of the HTSSOP package for heat dissipation requirements. Verify that the 1.5 A current limit meets the LED string requirements. Evaluate the need for AEC-Q100 qualification if deploying in automotive environments.

Part Context

This part belongs to the LM3406 family of LED drivers, specifically the high-voltage variant designed for demanding electrical environments. The Q1 suffix denotes automotive-grade reliability and quality certification. It serves as a robust solution for driving high-power LEDs where supply voltage fluctuations are significant. The HV variant distinguishes itself from lower voltage counterparts by its extended input range.

Replacement Considerations

LM3406HVQMHQ1 is a parameter-equivalent alternative available in tube packaging.