LT3746IUHH#PBF

LED Driver IC Overview

The LT3746IUHH#PBF is a 32-channel LED driver controller with an integrated buck converter, designed for high-density lighting applications. It operates from a 6V to 55V input supply and delivers up to 30mA per channel. The device supports PWM dimming and features open LED protection. Operating at a 1MHz switching frequency, it minimizes external component size. Packaged in a 56-lead QFN, it functions within a -40°C to +125°C temperature range, offering adjustable output voltage control for versatile LED string configurations.

LED Driver IC Feature Summary

• Integrates a synchronous buck controller with 32 independent current-regulated outputs
• Supports precise PWM dimming for uniform brightness control across channels
• Includes built-in open LED protection to enhance system reliability
• Operates at high switching frequencies to reduce passive component footprint

LED Driver IC Applications

• High-density LED backlighting modules
• Automotive interior and exterior lighting systems
• Industrial LED panel illumination
• Architectural accent lighting arrays

LED Driver IC Procurement Notes

Verify the specific suffix (EUHH vs IUHH) against your bill of materials, as temperature grades may differ. Confirm RoHS compliance status through official Analog Devices documentation prior to integration. Ensure the 56-QFN package dimensions align with your PCB layout constraints. Cross-reference the datasheet revision date to confirm feature availability. Validate that the 6V-55V input range matches your power supply architecture.

LED Driver IC Selection Notes

Select this component when designing multi-channel LED drivers requiring a single controller for multiple strings. The integrated buck topology simplifies design by reducing external switch requirements. Consider the 30mA output capability for standard LED arrays. Evaluate the 1MHz frequency for trade-offs between efficiency and EMI. Ensure thermal management strategies accommodate the QFN package's heat dissipation characteristics in enclosed environments.

LED Driver IC Part Context

This part belongs to the LT3746 family of LED driver controllers from Analog Devices. It complements other linear regulators and DC/DC converters in lighting portfolios. The series targets applications needing precise current regulation without complex discrete solutions. Related components often share similar interface protocols or packaging options for system scalability.

LED Driver IC Replacement Considerations

LT3746EUHH#PBF serves as a verified alternative within the same product family, differing primarily in operating temperature specifications. Both variants maintain identical electrical performance and pinout compatibility. Verify thermal requirements before substitution to ensure environmental suitability.

LED Driver IC FAQ

Does the LT3746IUHH#PBF include internal switches?

No, the LT3746IUHH#PBF is a controller only and requires external synchronous MOSFETs for the buck converter stage.

What is the maximum input voltage for this device?

The maximum input voltage is 55V, allowing operation from various automotive and industrial power sources.