LT3755IUD-2#TRPBF

LED Driver IC Overview

The LT3755IUD-2#TRPBF is a DC/DC controller designed as a constant-current source for high-current LEDs. It operates with an input voltage range of 4.5 V to 40 V and supports output voltages up to 75 V. The device delivers a typical maximum output current of 10 A. It utilizes a fixed-frequency, current-mode architecture for stable operation across wide supply and output voltage ranges. The IC features an internal regulated 7.15 V supply to drive external low-side N-channel power MOSFETs. It supports multiple topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC. The component is housed in a 16-pin QFN package and operates within a temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Supports multiple converter topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC for flexible LED driver designs.
• Integrates an internal regulated 7.15 V supply to drive external low-side N-channel power MOSFETs.
• Provides open LED protection and PWM dimming capabilities for enhanced system safety and control.

LED Driver IC Applications

• Automotive LED headlamp drivers
• High-power LED lighting systems
• LED display backlights

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the LT3755IUD-2 variant matches the required pinout and functional specifications for the target design. Ensure compatibility with the intended operating temperature range and voltage requirements before finalizing procurement decisions.

LED Driver IC Selection Notes

Select this component for applications requiring high current drive capabilities and flexible topology support. The integrated MOSFET driver simplifies board layout by eliminating the need for external gate drive circuits. Consider the thermal performance of the QFN package and the external MOSFET selection to ensure efficient operation under maximum load conditions.

LED Driver IC Part Context

The LT3755 series includes variants such as LT3755IUD-1 and LT3755IUD-2, which are DC/DC controllers optimized for driving high-current LEDs. These devices share core architectural features but may differ in specific pin configurations or internal references. The IUD package denotes a 16-lead QFN form factor suitable for surface-mount assembly.

LED Driver IC Replacement Considerations

LT3755IUD-2#PBF is a tube-packaged version of the same electrical component. LT3755IMSE-2#TRPBF offers the same functionality in an MSOP-16 package. Verify pin-to-pin compatibility and thermal characteristics when substituting these alternatives.