LYTSwitch-6 Family Flyback CV/CC LED Driver IC with Integrated 650 V / 725 V MOSFET and FluxLink Feedback Product Highlights Highly Integrated, Compact Footprint • Up to 94% efficiency across full load range SR FET • 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 DVFWDSRGNDBPSFBLYTSwitch-6 • Adjustable accurate output current sense using external sense resistor VOUT Optional Primary FET Current EcoSmart™ – Energy Efficient and Controller Sense • Less than 15 mW no-load including line sense (without PF front end) SBPPIS Secondary Control IC • Easily meets Energy Star and all global lighting energy efficiency regulations • Low heat dissipation PI-8375-072817 Advanced Protection / Safety Features Figure 1. Typical Application/Performance. • 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 Figure 2. High Creepage, Safety-Compliant InSOP-24D Package. • 100% production HIPOT compliance testing • UL1577 and TUV (EN60950) safety approved Green Package • Halogen free and RoHS compliant Output Power TableApplications 277 VAC ± 15% 85-305 VAC 380 VDC / 450 VDC2 • Isolated off-line LED driver Product3 • Smart LED lighting Open Frame1 Open Frame1 Open Frame1 • High-voltage flyback post regulator DescriptionLYT6063C/6073C 15 W 12 W 25 W The LYTSwitch™-6 series family of ICs dramatical y simplifies the LYT6065C/6075C 30 W 25 W 40 W development and manufacturing of off-line LED drivers, particularly those in compact enclosures or with high efficiency requirements. LYT6067C/6077C 50 W 45 W 60 W The LYTSwitch-6 architecture is revolutionary in that the devices LYT6068C 65 W 55 W incorporate both primary and secondary control ers, with sense elements and a safety-rated feedback mechanism into a single IC. Table 1. Output Power Table. Notes: Close component proximity and innovative use of the integrated 1. Minimum continuous power in a typical non-ventilated and PCB size measured communication link, FluxLink, permit accurate control of a secondary- at 40 °C ambient. Max output power is dependent on the design. With side synchronous rectification MOSFET with Quasi-Resonant switching condition that package temperature must be < 125 °C. of primary integrated high-voltage MOSFET to maintain high efficiency 2. With 725 V FET only. 3. Package: InSOP-24D. across the entire load range. www.power.com February 2018 This Product is Covered by Patents and/or Pending Patent Applications. Document Outline Product Highlights Description Output Power Table Pin Functional Description LYTSwitch-6 Functional Description Primary Controller Secondary Controller Application Example Key Applications Design Considerations Primary-Side Components of LYTSwitch-6 Secondary-Side Components of f LYTSwitch-6 Recommendations for Circuit Board Layout Recommended Position of InSOP-24D Package with Respect to Transformer Quick Design Checklist Other Applications Design Example PCB Layout Example Absolute Maximum Ratings Thermal Resistance Key Electrical Characteristics Typical Performance Curves InSOP-24D Package Drawing MSL Table ESD and Latch-Up Table Part Ordering Information
