LT8391HFE#PBF

LED Driver IC Overview

The LT8391HFE#PBF is a synchronous four-switch buck-boost LED controller from Analog Devices. It operates with an input voltage range of 4 V to 60 V and supports output currents up to 10 A. The device features a fixed switching frequency of 600 kHz and integrates spread spectrum modulation for EMI reduction. Designed for high-efficiency LED lighting, it utilizes a TSSOP-28 package and functions within a temperature range of -40°C to +150°C.

LED Driver IC Feature Summary

• Integrates four internal power switches for compact buck-boost topology
• Includes spread spectrum modulation to minimize electromagnetic interference
• Supports constant current regulation for high-power LED applications

LED Driver IC Applications

• Automotive headlamp systems
• High-power general LED lighting fixtures
• Display backlighting drivers

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when reviewing distributor listings. Confirm RoHS compliance status through official Analog Devices documentation prior to integration. Ensure the TSSOP-28 thermal pad requirements are met in the PCB layout design to maintain reliability under high load conditions.

LED Driver IC Selection Notes

Select this component for designs requiring wide input voltage ranges and high output current capabilities. The integrated four-switch architecture eliminates external inductor constraints found in simpler topologies. Evaluate thermal performance carefully due to the high current handling capacity and ensure adequate heat dissipation paths are implemented on the printed circuit board.

LED Driver IC Part Context

This part belongs to the LT8391 family of synchronous buck-boost controllers. It shares architectural similarities with the LT8390 but is optimized specifically for LED driver applications rather than general DC/DC conversion. The device offers a robust solution for maintaining stable LED brightness across varying supply voltages.

LED Driver IC Replacement Considerations

The LT8390HFE#PBF serves as a related controller within the same family, though it is designed for general DC/DC applications rather than dedicated LED driving. Verify pin compatibility and control loop stability when considering alternative components from other manufacturers.