LC5556LD

Overview

The LC5556LD is a single-stage power factor corrected, high-efficiency non-isolated buck LED driver IC manufactured by Sanken Electric. It utilizes a PWM and quasi-resonant topology to drive LEDs from an AC input. The device integrates separate controller and power MOSFET chips for optimized performance. It operates as an offline switcher with dimming capabilities and is housed in an 8-DIP package.

Feature Summary

• Integrates separate controller and power MOSFET chips
• Single-stage power factor correction
• PWM and quasi-resonant non-isolated buck topology

Applications

• LED lighting systems requiring non-isolated buck conversion
• Offline AC-DC LED driver designs
• General illumination applications utilizing power factor correction

Procurement Notes

Verify current availability status as the LC5556LD may be obsolete or end-of-life. Confirm package type matches project requirements. Check RoHS compliance documentation. Ensure design supports non-isolated topology constraints. Validate pinout compatibility if replacing existing components.

Selection Notes

Select this component for non-isolated AC-DC LED applications requiring integrated PFC. Suitable for designs where separate controller and MOSFET integration reduces component count. Verify input voltage range matches application needs. Consider thermal management for the DIP package configuration.

Part Context

Part of the LC5550 series from Sanken Electric, designed for efficient LED driving. The series focuses on single-stage solutions combining PFC and constant current regulation. The LC5556LD specifically addresses non-isolated buck converter topologies for cost-effective LED power supplies.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided data.