LC5555LD

Overview

The LC5555LD is a single-stage power factor corrected, high-efficiency non-isolated buck LED driver manufactured by Sanken Electric. Designed for off-line applications, this integrated circuit combines PFC and constant current regulation in a compact topology. It utilizes a buck switching architecture to drive LED loads directly from AC mains without requiring an isolation transformer. The component supports PWM dimming capabilities and operates within standard industrial temperature ranges, ensuring reliable performance for general lighting and backlighting applications.

Feature Summary

• Integrates single-stage power factor correction with non-isolated buck regulation
• Supports PWM dimming functionality for precise light control
• High-efficiency design optimized for direct AC mains connection

Applications

• General solid-state lighting fixtures
• Non-isolated LED backlight systems
• Commercial illumination modules

Procurement Notes

Verify the specific package variant and ordering suffix against the official Sanken Electric datasheet before procurement. Confirm that the application voltage range aligns with the component's rated input specifications. Ensure thermal management requirements are met for the intended operating environment. Cross-reference the part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select the LC5555LD for designs requiring integrated PFC and buck regulation in a non-isolated topology. This component is suitable for applications where size reduction and cost efficiency are prioritized over galvanic isolation. Evaluate the input voltage range and required output current to ensure compatibility with the target LED string configuration.

Part Context

This device belongs to the LC55 series of LED drivers from Sanken Electric, which focuses on single-stage AC-DC conversion solutions. The series targets high-efficiency lighting applications by combining power factor correction and constant current driving in a single chip. This approach simplifies the bill of materials and reduces the overall footprint of the power supply design.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.