LT3755IUD-1#PBF

LED Driver IC Overview

The LT3755IUD-1#PBF is a DC/DC controller designed for high-current LED driving applications. It supports multiple topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC. The device operates with an input voltage range of 4.5 V to 40 V and can drive output voltages up to 75 V. It features a fixed frequency current-mode architecture with an operating frequency range of 100 kHz to 1 MHz. The controller provides a maximum output current of 10 A and includes analog and PWM dimming capabilities. It is housed in a 16-lead QFN package and functions within a junction temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Supports versatile power conversion topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC configurations.
• Enables precise LED brightness control through combined analog and pulse-width modulation dimming methods.
• Utilizes a fixed-frequency current-mode architecture to ensure stable operation across wide input and output voltage variations.

LED Driver IC Applications

• Automotive LED headlamp drivers
• General LED lighting systems
• Display backlighting circuits

LED Driver IC Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm pinout and functional configuration. Ensure that the selected variant matches the required topology and electrical specifications for the target application. Cross-reference the component marking code with datasheet standards to authenticate the source. Confirm compliance requirements such as RoHS status prior to integration into final products.

LED Driver IC Selection Notes

Select this controller when designing circuits requiring flexible topology support for high-power LED arrays. Consider the wide input voltage range suitable for automotive or industrial supply rails. Evaluate thermal management needs given the QFN package and high current capability. Verify that the external MOSFET selection aligns with the internal gate drive voltage and switching frequency requirements.

LED Driver IC Part Context

This component belongs to the LT3755 family of LED controllers from Analog Devices. The family includes variants such as LT3755-1 and LT3755-2, which share core architectural features but may differ in specific electrical ratings or packaging options. These devices are engineered to provide constant current regulation for demanding lighting applications.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Consult official manufacturer resources for direct replacements or cross-reference guides.

LED Driver IC FAQ

What is the maximum output voltage supported by this controller?

The LT3755IUD-1#PBF supports output voltages up to 75 V.

Does the device support digital dimming protocols?

The datasheet specifies support for analog and PWM dimming; specific digital protocol compatibility should be verified in the full technical documentation.