LT3476IUHF#TRPBF

LED Driver IC Overview

The LT3476IUHF#TRPBF is a high-current quad output LED driver manufactured by Analog Devices Inc. It operates as a constant-current source for driving high-current LEDs, featuring a fixed frequency current-mode architecture for stable operation across wide supply and output voltage ranges. The device supports an input voltage range of 2.8V to 16V and delivers up to 100W of output power. It includes eight segments with a supply current of 5500uA. The switching frequency is programmable between 200kHz and 2MHz via an external pin. The component is housed in a 38-pin QFN EP package and is rated for automotive applications within a temperature range of -40°C to 85°C.

LED Driver IC Feature Summary

• Fixed frequency current-mode architecture ensures stable operation over wide input and output voltage variations.
• Programmable switching frequency allows optimization of efficiency and external component size.
• Designed specifically as a constant-current source for high-current LED applications.

LED Driver IC Applications

• High current LED lighting systems
• Automotive LED illumination
• General solid-state lighting drivers

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the IUHF designation corresponds to the industrial temperature grade (-40°C to 85°C) required for the application. Ensure the 38-pin QFN EP package footprint matches the PCB layout specifications. Cross-reference the exact part number against official Analog Devices documentation to confirm availability status and lead times prior to ordering.

LED Driver IC Selection Notes

Select this component when a quad output configuration is necessary for driving multiple high-current LED strings from a single controller. The wide input voltage range accommodates various power supply architectures. Consider the programmable frequency feature if electromagnetic interference constraints or passive component size limitations are critical design factors. Verify that the thermal performance of the QFN EP package meets the junction temperature requirements for the intended ambient conditions.

LED Driver IC Part Context

The LT3476 belongs to Analog Devices' portfolio of LED lighting drivers designed for robust performance in demanding environments. As a quad output device, it simplifies the design of complex lighting arrays compared to single-channel alternatives. The integration of current-mode control reduces the need for external compensation networks, streamlining the development process for professional lighting solutions.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate other Analog Devices LED drivers only if they match the quad output topology and electrical specifications exactly.

LED Driver IC FAQ

What is the operating temperature range for the LT3476IUHF#TRPBF?

The component is rated for an operating temperature range of -40°C to 85°C.

How is the switching frequency controlled in the LT3476?

The switching frequency is programmable between 200kHz and 2MHz using an external frequency adjust pin.