LYTSwitch-6

The LYTSwitch™-6 series family of ICs dramatically simplifies the development and manufacturing of off-line LED drivers, particularly those in compact enclosures or with high efficiency requirements. The LYTSwitch-6 architecture is revolutionary in that the devices incorporate both primary and secondary controllers, with sense elements and a safety-rated feedback mechanism into a single IC.

Close component proximity and innovative use of the integrated communication link, FluxLink, permit accurate control of a secondaryside synchronous rectification MOSFET with Quasi-Resonant switching of primary integrated high-voltage MOSFET to maintain high efficiency across the entire load range.

Product Highlights

Highly Integrated, Compact Footprint

• Up to 94% efficiency across full load range
• Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 650 V or 725 V MOSFET, secondary-side control and synchronous rectification driver
• Integrated FluxLink™, HIPOT-isolated, feedback link
• Exceptional CV/CC accuracy, independent of transformer design or external components
• Adjustable accurate output current sense using external sense resistor
• PWM dimmable

EcoSmart™ – Energy Efficient

• Less than 15 mW no-load including line sense (without PF front end)
• Easily meets Energy Star and all global lighting energy efficiency regulations
• Low heat dissipation

Advanced Protection / Safety Features

• Input line OV with auto-restart
• Output fault OVP/UVP with auto-restart
• Open SR FET gate detection
• Input voltage monitor with accurate brown-in
• Thermal foldback ensures that power continues to be delivered (lower level) at elevated temperatures

Full Safety and Regulatory Compliance

• Reinforced insulation
• Isolation voltage >4000 VAC
• 100% production HIPOT compliance testing
• UL1577 and TUV (EN60950) safety approved

Green Package

• Halogen free and RoHS compliant Applications
• Isolated off-line LED driver
• Smart LED lighting
• High-voltage flyback post regulator