LT3791EFE-1#PBF

Overview

The LT3791EFE-1#PBF is a synchronous four-switch buck-boost LED driver and regulator controller manufactured by Analog Devices Inc. It utilizes a single inductor architecture to manage input voltages ranging from 4.7V to 60V, supporting output voltages up to 60V. The device operates with a switching frequency between 200kHz and 700kHz and features a 38-pin TSSOP-EP package. It provides high efficiency of up to 98.5% and supports analog and PWM dimming for precise current regulation.

Feature Summary

• Synchronous four-switch topology enables seamless transition between buck, boost, and buck-boost modes regardless of input versus output voltage relationships.
• Integrated True Color PWM and analog dimming capabilities allow for accurate light control and color consistency across varying operating conditions.

Applications

• High-power LED string driving in automotive lighting systems
• Industrial general illumination fixtures requiring wide input voltage ranges
• Battery-powered lighting applications with variable source voltages

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Review the latest datasheet revision history for any updates to electrical characteristics or thermal performance data prior to finalizing procurement orders.

Selection Notes

Select this controller when designing circuits that require operation across wide input voltage fluctuations without mode transition glitches. Ensure external components support the 200kHz to 700kHz switching range. Verify that the thermal design accommodates the 38-TSSOP-EP package dissipation requirements for the intended power levels.

Part Context

This part belongs to the LT3791 family of LED drivers. It serves as a core control IC for high-efficiency power management in lighting applications. The device is often evaluated using demonstration boards such as the DC1666A to validate circuit performance before mass production integration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for potential obsolescence notices or recommended upgrades within the product line.