LT3791EFE#PBF

LED Driver IC Overview

The LT3791EFE#PBF is a synchronous four-switch buck-boost LED driver controller from Analog Devices Inc. It regulates LED current for strings up to 52V with input voltages ranging from 4.7V to 60V, supporting topologies above, below, or equal to the output voltage. The device operates at switching frequencies between 200kHz and 700kHz. It features analog and PWM dimming capabilities and is housed in a 38-TSSOP-EP package. The controller supports a maximum output voltage of 60V and includes shutdown functionality.

LED Driver IC Feature Summary

• Synchronous four-switch buck-boost topology enables regulation regardless of input-to-output voltage relationship
• Supports both analog and pulse-width modulation (PWM) dimming methods for precise light control
• Integrated high-voltage current sense amplifier simplifies external component count

LED Driver IC Applications

• General illumination systems requiring wide input voltage ranges
• Automotive lighting applications utilizing battery-supplied power
• Industrial lighting fixtures with variable supply voltages

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the lead time with authorized distributors as availability may vary. Ensure the design utilizes the recommended development kit DC1666A for initial validation. Check for RoHS compliance documentation prior to final procurement approval.

LED Driver IC Selection Notes

Select this controller for designs requiring a single-stage solution for varying input sources. The wide input range accommodates automotive cold-crank conditions. Consider thermal performance due to the TSSOP-EP package. Verify that the required LED string voltage does not exceed the 52V regulation limit specified for standard operation.

LED Driver IC Part Context

This component belongs to the LT3791 family of True Color PWM™ LED drivers. It is designed for high-efficiency constant current regulation. The device integrates gate drivers for external N-channel MOSFETs. It is distinct from the LT3791-1 variant which may have different pinout or feature sets.

LED Driver IC Replacement Considerations

The LT3791EFE-1#PBF is a related part number within the same family. Verify pin compatibility and electrical specifications before substitution. Consult the official datasheet update notices for any functional differences between the EFE and EFE-1 variants.