LT3791EFE

LED Driver IC Overview

The LT3791EFE is a synchronous four-switch buck-boost LED driver controller from Analog Devices Inc. It regulates LED current for strings up to 52V when input voltages are above, below, or equal to the output voltage. The device supports an input voltage range of 4.7V to 58V and delivers up to 2A output current. In typical applications, it achieves 98% efficiency with 50W output power at 25V/2A. The controller operates within a switching frequency range of 200kHz to 700kHz and features analog and PWM dimming capabilities.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology enables regulation regardless of input-to-output voltage relationship
• Supports both analog and PWM dimming methods for precise light control
• Integrated True Color PWM technology ensures consistent color performance across dimming ranges

LED Driver IC Applications

• High-efficiency LED lighting systems requiring wide input voltage ranges
• Automotive exterior lighting applications such as headlights and taillights
• Industrial and commercial fixed lighting fixtures

LED Driver IC Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to confirm package type and temperature rating. Confirm RoHS compliance status through the manufacturer's material declaration. Cross-reference the DigiKey or Mouser part numbers with the official datasheet to ensure compatibility with your design requirements before procurement.

LED Driver IC Selection Notes

Select this controller for designs requiring a single-stage solution for varying input voltages. Ensure external components support the 60V maximum rating. Verify that the chosen inductor and capacitors meet the thermal and electrical requirements for the target application current and frequency settings.

LED Driver IC Part Context

The LT3791EFE belongs to the LT3791 family of LED driver controllers. It is designed for high-performance lighting applications where efficiency and color consistency are critical. The device integrates the control logic for a synchronous buck-boost converter, requiring external power switches and passive components to complete the circuit.

LED Driver IC Replacement Considerations

The LT3791EFE-1#PBF is a related variant within the same family. Verify specific pinout and functional differences between the EFE and EFE-1 suffixes in the official datasheet before substitution.