LT8391IUFD#TRPBF

LED Driver IC Overview

The LT8391IUFD#TRPBF is a synchronous four-switch buck-boost LED controller manufactured by Analog Devices Inc. It regulates LED current when the input voltage is above, below, or equal to the output voltage. The device supports an input voltage range of 4 V to 60 V and delivers up to 2 A of output current. It operates at switching frequencies between 150 kHz and 650 kHz. The maximum output voltage is 60 V. It features PWM dimming and open LED protection. The component is housed in a 28-lead QFN package and operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology for flexible input-output voltage relationships
• Integrated PWM dimming capability for precise light control
• Built-in open LED protection circuitry

LED Driver IC Applications

• LED lighting driver ICs
• Automotive LED applications
• General purpose DC/DC controllers

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging rather than tube packaging found in other variants like #PBF. Confirm availability status as supply may be limited or restricted. Ensure the ordering part number matches the exact package and quantity requirements for your production line.

LED Driver IC Selection Notes

Select this component when input voltages vary significantly relative to the required LED string voltage. The synchronous buck-boost architecture eliminates the need for external Schottky diodes, improving efficiency. Consider the 28-QFN package size for space-constrained designs requiring high thermal performance.

LED Driver IC Part Context

This part belongs to the LT8391 series of LED controllers. It is functionally similar to the LT8390 but includes specific features tailored for LED driving such as constant current regulation and dimming interfaces. The IUFD designation specifies the industrial temperature grade and QFN package type.

LED Driver IC Replacement Considerations

LT8391IUFD#PBF is a verified substitute with identical electrical specifications but differs in packaging format (tube vs. tape and reel). Other family members like LT8390 share the core buck-boost architecture but lack specific LED driver optimizations.