LT3517HUF#PBF

LED Driver IC Overview

The LT3517HUF#PBF is a high-performance LED lighting driver IC manufactured by Analog Devices Inc. It features a fully integrated 1.5A switch current capability and supports Boost, Buck, and Buck-Boost topologies for versatile LED driving configurations. The device operates within an input voltage range of 3V to 30V and includes 40V transient protection. It offers a wide operating frequency range from 250kHz to 2.5MHz and supports PWM dimming with open LED protection. Designed for harsh environments, it functions at junction temperatures up to 150°C and is housed in a compact TSSOP-16 package.

LED Driver IC Feature Summary

• Supports multiple switching topologies including Boost, Buck, and Buck-Boost for flexible LED drive applications
• Integrated 1.5A switch current capability with high-side current sensing for precise regulation
• Capable of operation at elevated junction temperatures up to 150°C for automotive and industrial use
• Features True Color PWM dimming and analog dimming control via the CTRL pin

LED Driver IC Applications

• Automotive exterior and interior lighting systems
• Industrial high-intensity discharge lamp drivers
• Architectural and building illumination fixtures
• General-purpose constant current LED drivers requiring high reliability

LED Driver IC Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm that the specific H-grade suffix corresponds to the required 150°C junction temperature rating for your application environment. Ensure the TSSOP-16 package variant matches your PCB footprint requirements. Request official datasheets and material declarations to verify RoHS compliance and manufacturing origin before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when designing LED drivers that require high-side current sensing and operation in high-temperature environments. The H-grade version is specifically chosen over E or I grades when the application demands a maximum junction temperature of 150°C rather than 125°C. Consider the 1.5A switch limit and the 3V-30V input range to ensure compatibility with the power source and LED string configuration. Evaluate the need for PWM dimming capabilities and the specific switching frequency requirements to optimize external component sizes.

LED Driver IC Part Context

The LT3517 series represents a family of full-featured LED drivers designed for high-reliability applications. The HUF variant specifically denotes the H-grade thermal performance combined with the UF package style. This part belongs to the broader LT3517 product line, which shares identical electrical specifications across E, I, and H grades but differs in thermal endurance. The H-grade designation ensures suitability for demanding automotive and industrial sectors where ambient temperatures can exceed standard commercial limits.

LED Driver IC Replacement Considerations

LT3517IFE#PBF: Lower thermal grade (125°C max). LT3517IUF#PBF: Lower thermal grade (125°C max). LT3518HUF#PBF: Higher switch current (2.3A), different package.