LT3761AIMSE#WTRPBF

LED Driver IC Overview

The LT3761AIMSE#WTRPBF is a high-performance LED lighting driver IC from Analog Devices, designed for versatile DC-DC conversion topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC. It features an integrated PWM generator capable of producing precise dimming signals without external components. The device supports an input voltage range of 4.5 V to 60 V and can drive output voltages up to 100 V with a maximum output current of 10 A. Operating frequencies are adjustable between 100 kHz and 1 MHz. It is housed in a 16-lead MSOP package with exposed pad and operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Integrated internal PWM generator enables precise LED dimming control without requiring external signal generation circuitry.
• Supports multiple power converter topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC for flexible system design.
• Provides both analog CTRL input for additional dimming capability and high-ratio PWM dimming functionality.
• Includes open LED protection features to enhance system reliability and safety during fault conditions.

LED Driver IC Applications

• General purpose LED lighting systems
• High-power LED drivers requiring precise brightness control
• Automotive lighting applications
• Industrial illumination fixtures

LED Driver IC Procurement Notes

Verify the specific suffix #WTRPBF indicates tape and reel packaging when ordering. Confirm that the AIMSE variant meets the required industrial temperature specifications (-40°C to +125°C). Ensure compatibility with the intended PCB footprint for the 16-lead MSOP package. Cross-reference the datasheet for any recent revisions or obsolescence notices before finalizing procurement plans.

LED Driver IC Selection Notes

Select this component when a single controller must support multiple topologies such as Buck-Boost or SEPIC for wide input voltage ranges. The internal PWM generator simplifies designs by removing the need for separate microcontroller or timer circuits for dimming. Consider the 10 A output current capability and 60 V input limit to ensure adequate headroom for the target application's electrical requirements.

LED Driver IC Part Context

This part belongs to the LT3761 family of LED controllers manufactured by Analog Devices. The family includes variants like LT3761EMSE#TRPBF and LT3761EMSE-1#PBF. These devices are specialized for driving high-power LEDs using various switching regulator architectures. The LT3761 series is distinct from general-purpose DC-DC controllers due to its integrated LED-specific protections and dimming interfaces.

LED Driver IC Replacement Considerations

Direct substitutes include LT3761EMSE#TRPBF and LT3761EMSE-1#PBF. Verify pinout compatibility and thermal performance differences between tube and reel packaging variants. Ensure that alternative parts maintain the same 60 V input rating and 10 A output capability if replacing in existing designs.

LED Driver IC FAQ

Does the LT3761AIMSE#WTRPBF require an external PWM signal for dimming?

No, it features an internal PWM generator that can produce precise dimming signals without external components, though it also accepts external PWM or analog CTRL inputs.

What is the maximum input voltage supported by this IC?

The device supports a maximum input voltage of 60 V.

Can this controller be used in a SEPIC topology?

Yes, the LT3761 supports Boost, Buck, Buck-Boost, Flyback, and SEPIC topologies.