LT8391AEUFD#PBF

LED Driver IC Overview

The LT8391AEUFD#PBF is a synchronous 4-switch buck-boost LED controller from Analog Devices, designed for high-efficiency LED lighting applications. It regulates LED current regardless of whether the input voltage is above, below, or equal to the output voltage. The device operates with an input voltage range of 4 V to 60 V and supports a maximum output voltage of 60 V. It features a programmable switching frequency between 600 kHz and 2 MHz, delivering up to 1.5 A of output current. Packaged in a QFN-28 form factor, it functions within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology enables regulation across wide input-to-output voltage differentials
• Integrated PWM dimming capability for precise brightness control
• Open LED protection mechanism ensures system safety during fault conditions

LED Driver IC Applications

• LED lighting driver systems requiring flexible input voltage ranges
• Automotive exterior and interior lighting modules
• Industrial illumination fixtures with variable power sources

LED Driver IC Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status and specific lot traceability upon receipt. Ensure storage conditions adhere to manufacturer guidelines to maintain solderability and electrical integrity before assembly.

LED Driver IC Selection Notes

Select this controller when application requirements demand a single-stage solution for buck, boost, or buck-boost topologies. It is suitable for designs where input voltage fluctuates significantly relative to the LED string voltage. Consider the QFN-28 package for thermal management needs and space-constrained PCB layouts.

LED Driver IC Part Context

This part belongs to the LT8391A series, which focuses on synchronous buck-boost controllers for LED drivers. It complements other power management ICs by providing specialized current regulation for lighting loads rather than general-purpose voltage conversion.

LED Driver IC Replacement Considerations

The LT8390AIUFD#PBF is a related synchronous buck-boost controller but serves as a general voltage regulator rather than a dedicated LED driver. Verify functional compatibility if substituting, noting differences in output current capabilities and integrated protection features.