LT8391AEFE#TRPBF

LED Driver IC Overview

The LT8391AEFE#TRPBF is a synchronous 4-switch buck-boost LED controller from Analog Devices Inc., housed in a 28-TSSOP-EP package. It supports an input voltage range of 4V to 60V and delivers up to 10A output current with a switch current rating of 25A. The device operates at frequencies between 600kHz and 2MHz, featuring internal 25% triangle spread spectrum for EMI reduction. It offers analog and PWM dimming capabilities, with a maximum supply current of 2.8mA and an operating temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology regulates LED current regardless of input voltage relative to output voltage
• Proprietary peak-buck/peak-boost current mode control enables seamless transitions between operation regions
• Supports adjustable external clock synchronization or internal spread spectrum modulation for low electromagnetic interference

LED Driver IC Applications

• Automotive LED lighting systems
• Industrial LED driver circuits
• Battery-powered lighting applications

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the AEFE variant meets the required thermal performance for your enclosure design. Ensure compatibility with your system's logic levels for PWM and analog dimming inputs. Cross-reference the datasheet revision date to confirm pinout and electrical characteristics match your schematic requirements before finalizing procurement.

LED Driver IC Selection Notes

Select this component when input voltage varies significantly above, below, or equal to the LED string voltage. It is suitable for designs requiring high efficiency across wide input ranges without complex transformer-based solutions. Consider the 28-TSSOP-EP package for thermal management needs. Verify that the 60V maximum ratings align with your system's transient voltage spikes and operating conditions.

LED Driver IC Part Context

The LT8391A series represents Analog Devices' approach to flexible LED driving using synchronous buck-boost architectures. This family integrates power switches and control logic to simplify board space compared to discrete solutions. The LT8391AEFE#TRPBF specifically targets applications demanding robust performance in automotive and industrial environments where reliability under varying load and line conditions is critical.

LED Driver IC Replacement Considerations

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