LT8391AIUFD#TRPBF

LED Driver IC Overview

The LT8391AIUFD#TRPBF is a synchronous 4-switch buck-boost LED controller manufactured by Analog Devices Inc. It regulates LED current regardless of whether the input voltage is above, below, or equal to the output voltage. The device supports an input voltage range of 4V to 60V and provides up to 10A output current. It features adjustable and synchronizable fixed frequency operation from 600kHz to 2MHz, or internal 25% triangle spread spectrum for low EMI. The component operates within a temperature range of -40°C to +125°C and utilizes a 28-WFQFN (4x5) package.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology enables seamless transitions between operating regions with low noise.
• Proprietary peak-buck/peak-boost current mode control scheme ensures precise LED current regulation.
• Internal 25% triangle spread spectrum operation reduces electromagnetic interference without external components.

LED Driver IC Applications

• Automotive LED lighting systems
• Industrial LED driver designs
• Battery-powered system illumination

LED Driver IC Procurement Notes

Verify that the part number suffix matches the specific package variant required for your design. Confirm the manufacturer source is authorized to ensure component authenticity. Check datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing procurement orders.

LED Driver IC Selection Notes

Select this controller when input voltage fluctuates significantly relative to the LED string voltage. It is suitable for applications requiring high efficiency across wide input ranges. Ensure the thermal pad connection is properly managed due to the exposed pad QFN package design.

LED Driver IC Part Context

This component belongs to the LT8391A series of LED driver controllers. It is designed for high-performance lighting applications where standard buck or boost converters cannot maintain regulation across varying input conditions. The series integrates advanced control schemes to optimize performance in automotive and industrial environments.

LED Driver IC Replacement Considerations

The LT8391AIFE#TRPBF is a confirmed substitute part number within the same family, offering identical functionality but housed in a TSSOP-28 package instead of the WFQFN format. Verify footprint compatibility before substitution.