LT3745IUJ-1#TRPBF

LED Driver IC Overview

The LT3745IUJ-1#TRPBF is a 16-channel LED driver IC featuring an integrated step-down (buck) DC/DC controller. It delivers up to 50mA per channel with a maximum output voltage of 36V. The device operates within a supply voltage range of 6V to 55V and supports PWM dimming for brightness control. It utilizes a 40-WFQFN package with exposed pad, measuring 6x6 mm. The switching frequency ranges from 200kHz to 1MHz, and the junction temperature range is -40°C to 125°C.

LED Driver IC Feature Summary

• Integrates a buck converter controller with 16 independent current channels
• Supports high-resolution PWM dimming for precise brightness adjustment
• Provides constant current regulation across multiple LED strings
• Operates efficiently over a wide input voltage range

LED Driver IC Applications

• High-power LED lighting systems
• Industrial backlighting applications
• Signage and display illumination
• Automotive exterior lighting modules

LED Driver IC Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm that the -1 variant corresponds to the 50mA specification rather than the standard 75mA version found in other LT3745 derivatives. Ensure compatibility with the required thermal pad soldering process for the QFN-40 package during assembly.

LED Driver IC Selection Notes

Select this component when designing multi-string LED drivers requiring integrated buck conversion. Compare against the LT3745 standard version if higher per-channel current (75mA) is needed. Consider the operating frequency range and thermal dissipation requirements of the 6x6mm QFN package for PCB layout optimization.

LED Driver IC Part Context

This part belongs to the LT3745 family of LED drivers from Analog Devices. It differs from the standard LT3745 by offering 50mA per channel instead of 75mA. The -1 suffix distinguishes it from other variants in the series, while #TRPBF denotes the tape-and-reel packaging format suitable for automated surface-mount assembly.

LED Driver IC Replacement Considerations

LT3745IUJ#PBF offers similar functionality but provides 75mA per channel instead of 50mA. LT3745IUJ-1#PBF is the tube-packaged equivalent of this part number. Verify pinout and thermal characteristics match when substituting.