DESCRIPTION

· The LYTSwitch™-1 family is designed for single-stage, high PF, constant current LED bulbs and tubes.

· It integrates a high-voltage MOSFET with a variable on-time CrM controller.

· Offers extensive protection features with minimal external components, ensuring high power density and functionality.

· Suitable for both high-side and low-side non-isolated buck topologies.

· Ideal for applications ranging from 2 W to 22 W.

FEATURES

· Single-stage PFC with accurate constant current output (±3% regulation).

· High efficiency (>93%) and power factor (>0.9).

· Robust 725 V MOSFET for enhanced line voltage surge performance.

· Critical Conduction Mode (CrM) buck for low turn-on losses and cost-effective output diode.

· Comprehensive protection features including auto-restart, OVP, short-circuit, open-loop, and thermal control.

· Thermal foldback and over-temperature shutdown for reliable operation under fault conditions.

APPLICATIONS

· Single-stage, high PF, constant current LED bulbs and tubes.

· Non-isolated buck topology applications in both high-side and low-side configurations.

· Suitable for a wide input voltage range (90 VAC – 308 VAC) and various output voltage ranges.

· Applications requiring power from 2 W to 22 W, with specific models optimized for smallest components or lowest THD.