LT8374RUFM-1#WPBF

LED Driver IC Overview

The LT8374RUFM-1#WPBF is a high-efficiency, monolithic synchronous step-down DC/DC converter designed for LED lighting applications. It features a wide input voltage range from 6.5V to 60V and supports an output current of 1.2A. The device operates at a fixed internal frequency of 330kHz with external synchronization capability. It includes peak current control, spread spectrum frequency modulation (SSFM) for EMI reduction, and analog/PWM dimming with a 20:1 ratio. The component is housed in a 16-lead QFN package (4mm × 4mm) and is AEC-Q100 qualified for automotive use.

LED Driver IC Feature Summary

• Synchronous buck topology with integrated power switches
• Wide input voltage range supporting up to 60V
• Integrated spread spectrum frequency modulation
• AEC-Q100 qualified for automotive environments

LED Driver IC Applications

• Automotive exterior and interior lighting systems
• Matrix LED illumination arrays
• General-purpose LED drivers
• Constant current source circuits

LED Driver IC Procurement Notes

Verify the specific suffix '-1' indicates the 330kHz fixed frequency variant rather than the 2MHz version. Confirm the '#WPBF' designation ensures lead-free and RoHS compliance. Check for AEC-Q100 certification requirements if deploying in automotive-grade assemblies. Ensure the 16-lead QFN thermal pad soldering process meets PCB layout guidelines for optimal heat dissipation.

LED Driver IC Selection Notes

Select this part when a wide input voltage range up to 60V is required for single-string or matrix LED configurations. Choose the 330kHz frequency variant for lower component size compared to higher frequencies. Consider the integrated compensation and SSFM features to simplify design and reduce EMI filtering needs. Verify that the 1.2A output current aligns with the target LED load requirements.

LED Driver IC Part Context

This component belongs to the LT8374 family of synchronous step-down converters. The LT8374-1 variant specifically denotes the 330kHz fixed-frequency operation, distinguishing it from the standard LT8374 which offers 2MHz switching. Both variants share similar pinouts and functional blocks but differ in switching speed and associated passive component selection.

LED Driver IC Replacement Considerations

Direct substitutes within the same family include the LT8374RUFM#WPBF for 2MHz operation. Cross-family replacements require matching the 60V input limit, 1.2A current capacity, and QFN-16 package dimensions. Verify compatibility with existing control loops and thermal management designs before substitution.

LED Driver IC FAQ

What is the difference between LT8374 and LT8374-1?

The LT8374-1 variant operates at a fixed internal frequency of 330kHz, whereas the standard LT8374 operates at 2MHz.

How is LED brightness controlled in this device?

Brightness can be adjusted via analog voltage control on the CTRL pin or through PWM signals, offering a 20:1 dimming ratio.