LT3955IUHE

LED Driver IC Overview

The LT3955IUHE is a high-efficiency LED driver IC featuring an internal PWM generator. It operates as a single-output DC-DC converter supporting flyback, SEPIC, buck, and boost topologies. The device accepts input voltages from 4.5V to 60V and supports maximum output voltages up to 80V. It provides a switch current capability of 3.5A with a switching frequency range of 100kHz to 1MHz. The component is housed in a 36-QFN (5x6) package and functions within a junction temperature range of -40°C to 125°C.

LED Driver IC Feature Summary

• Integrates an internal PWM generator for direct dimming control
• Supports multiple converter topologies including flyback, SEPIC, buck, and boost
• Enables analog and PWM dimming capabilities

LED Driver IC Applications

• LED lighting systems requiring high efficiency
• Industrial illumination applications
• Automotive lighting circuits

LED Driver IC Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Confirm availability status through authorized distributors as supply may be restricted. Ensure the selected variant matches the required input voltage range and thermal performance specifications for the target application environment.

LED Driver IC Selection Notes

Select this component when designing LED drivers that require flexible topology options such as flyback or SEPIC. Consider the 3.5A switch current limit and 60V input range for power requirements. Evaluate the need for integrated PWM generation versus external control signals based on system complexity and cost constraints.

LED Driver IC Part Context

The LT3955 belongs to the Linear Technology (now Analog Devices) family of LED driver ICs. It is designed for applications demanding high efficiency and versatile connectivity. The device integrates power switches and control logic to simplify design while maintaining robust performance across various industrial and commercial lighting standards.

LED Driver IC Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Cross-reference pinout compatibility and electrical parameters before implementation.