LT3478IFE

LED Driver IC Overview

The LT3478IFE is a monolithic LED lighting driver IC from Analog Devices, designed for high-current applications. It features a boost topology with a single output channel capable of delivering up to 4.2 A of output current. The device operates within an input voltage range of 2.8 V to 36 V and supports a maximum output voltage of 42 V. It utilizes a TSSOP-16 surface-mount package and incorporates true color PWM dimming capabilities for brightness control.

LED Driver IC Feature Summary

• Integrates true color pulse-width modulation (PWM) dimming functionality to maintain consistent color temperature across varying brightness levels.
• Provides open LED protection mechanisms to safeguard the driver and connected loads during fault conditions.
• Supports adjustable switching frequencies ranging from 200 kHz to 2.25 MHz for flexible filter component selection.

LED Driver IC Applications

• High-power LED lighting systems requiring precise current regulation
• Automotive exterior and interior illumination modules
• General solid-state lighting fixtures utilizing mono LED drivers

LED Driver IC Procurement Notes

Verify the specific suffix against official documentation, as variations such as TRPBF or PBF indicate different packaging formats like reels or tubes. Confirm availability status directly with authorized distributors, as supply constraints may apply. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment.

LED Driver IC Selection Notes

Select this component when a single-channel boost converter is required for driving high-current LEDs. Consider the LT3478IFE-1#PBF if buck-boost topology support is necessary instead of standard boost operation. Evaluate the TSSOP-16 package constraints regarding thermal dissipation and PCB layout requirements for optimal performance.

LED Driver IC Part Context

This part belongs to the LT3478 series of mono LED drivers manufactured by Analog Devices. It is distinct from the LM3478 series produced by Texas Instruments, which utilizes different internal architectures and pin configurations. The LT3478IFE specifically denotes the industrial temperature grade version in a TSSOP-16 package.

LED Driver IC Replacement Considerations

LT3478IFE-1#PBF offers similar core functionality but includes buck-boost topology support alongside boost capabilities.

LED Driver IC FAQ

What is the primary difference between the LT3478IFE and LT3478IFE-1 variants?

The LT3478IFE-1 variant supports both Boost and Buck topologies, whereas the standard LT3478IFE is configured primarily for Boost topology applications.

Does the LT3478IFE support analog dimming?

The datasheet specifies True Color PWM Dimming as the primary dimming method; analog dimming capabilities are not explicitly documented as a standard feature in the provided specifications.