LT8391EFE#TRPBF

LED Driver IC Overview

The LT8391EFE#TRPBF is a synchronous four-switch buck-boost LED controller from Analog Devices, housed in a 28-lead TSSOP package. 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 delivers up to 10A of output current. Operating at a fixed frequency of 600kHz, it features spread spectrum modulation for low EMI. The controller includes analog and PWM dimming capabilities and functions within a temperature range of -40°C to +150°C.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology enables regulation across wide input-to-output voltage differentials
• Integrated spread spectrum modulation reduces electromagnetic interference emissions
• Supports both analog and pulse-width modulation dimming for precise light control

LED Driver IC Applications

• LED lighting drivers requiring high efficiency across varying input voltages
• Industrial illumination systems with wide input voltage ranges
• Automotive exterior lighting applications

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when reviewing distributor listings. Confirm the manufacturer is Analog Devices Inc., formerly Linear Technology. Ensure the component matches the 28-lead TSSOP physical footprint. Cross-reference the datasheet revision to confirm feature compatibility before integration into production designs.

LED Driver IC Selection Notes

Select this controller for applications demanding buck-boost operation without external inductor current sensing complexity. The 600kHz switching frequency allows for compact passive component selection. Consider the thermal performance of the TSSOP package relative to the expected 10A load. Verify that the required dimming interface aligns with the available analog and PWM control pins.

LED Driver IC Part Context

This component belongs to the LT8391 family of synchronous buck-boost controllers designed for LED driving. It shares architectural similarities with the LT8390 but offers optimized performance for lighting applications. The device integrates the gate drivers for all four switches, simplifying the bill of materials compared to discrete solutions.

LED Driver IC Replacement Considerations

The LT8391EFE#PBF is the tube-packaged equivalent of this reel-part. For pin-compatible alternatives, consider the LT8390 series, though functional differences exist regarding spread spectrum features. Verify electrical parameters against the LT3791 if higher current density is not required.