LT3956IUHE

LED Driver IC Overview

The LT3956IUHE is a DC/DC converter designed for high-voltage LED lighting applications. It operates as a constant-current source and constant-voltage regulator, supporting boost, flyback, SEPIC, and buck topologies. The device features an internal 3.3A switch rated at 84V and accepts input voltages from 4.5V to 80V. It provides up to 80V output voltage and supports true color PWM dimming with a ratio of 3000:1. Packaged in a 36-lead QFN (5x6mm) case, it is suitable for driving high-power LEDs in demanding environments.

LED Driver IC Feature Summary

• Supports multiple converter topologies including boost, flyback, SEPIC, and step-down configurations.
• Enables precise light control through wide-range analog and PWM dimming capabilities.
• Integrates a high-voltage power switch to simplify external component count.

LED Driver IC Applications

• High-power LED street lighting systems
• Industrial floodlighting fixtures
• Commercial architectural lighting

LED Driver IC Procurement Notes

Verify the specific suffix on the datasheet to confirm package type and tape/reel specifications. Ensure the operating temperature range meets your environmental requirements. Confirm availability status with authorized distributors as supply levels may vary. Cross-reference pinouts if replacing existing designs to ensure mechanical compatibility.

LED Driver IC Selection Notes

Select this component when designing circuits requiring high input voltage ranges and flexible topology options for LED drivers. Consider the thermal performance of the QFN package for high-current applications. Evaluate the need for integrated switching versus external solutions based on efficiency targets and board space constraints.

LED Driver IC Part Context

This part belongs to the LT3956 series of LED driver ICs from Analog Devices. It is engineered specifically for high-voltage LED applications where reliability and precise current regulation are critical. The series offers various packaging options to suit different manufacturing needs.

LED Driver IC Replacement Considerations

Check for direct substitutes within the LT3956 family or other Analog Devices high-voltage LED drivers. Verify that alternative parts support the same input voltage range and output current requirements. Ensure pin compatibility if maintaining the existing PCB layout.