LT8391HUFD#PBF

LED Driver IC Overview

The LT8391HUFD#PBF is a synchronous 4-switch buck-boost LED controller from Analog Devices Inc., designed for high-voltage LED lighting applications. It operates with an input voltage range of 4V to 60V and supports output voltages up to 60V. The device regulates LED current regardless of whether the input voltage is above, below, or equal to the output voltage. It features a switching frequency range of 600 kHz to 2 MHz and delivers an output current capability of 1.5 A. The component is housed in a QFN-28 package and functions as a single-channel DC-DC controller suitable for step-down and step-up topologies.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology enables regulation across wide input-output voltage differentials
• Integrated PWM dimming control for precise brightness adjustment
• Built-in open LED protection circuitry enhances system reliability
• Supports operation with input voltages both above and below the output voltage level

LED Driver IC Applications

• LED lighting driver systems
• Display backlighting circuits
• Indicator light controllers

LED Driver IC Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to ensure correct pinout and thermal pad configuration. Confirm RoHS compliance status through the manufacturer's latest certification records. Check for any specific handling requirements related to the exposed pad thermal design during assembly. Ensure that the procurement channel provides valid traceability documents for quality assurance purposes.

LED Driver IC Selection Notes

Select this component when designing LED drivers requiring a wide input voltage range up to 60V. It is suitable for applications where the source voltage may fluctuate significantly relative to the LED string voltage. Consider the 28-QFN package for space-constrained designs. Verify that the required switching frequency falls within the 600 kHz to 2 MHz operational window for optimal efficiency and component sizing.

LED Driver IC Part Context

This part belongs to the LT8391 family of synchronous buck-boost LED controllers. It shares architectural similarities with other devices in the series but is specifically configured for high-voltage operations. The HUFD#PBF designation indicates a specific package variant and lead-free composition. It serves as a core control element in non-isolated LED power stages.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.