RDK-347 Power Integrations

Reference Design Report for a 12.6 W, TRIAC Dimmable, High Efficiency (>86%) Isolated Title Flyback, Power Factor Corrected (>0.97) LED TM Driver Using LYTSwitch LYT4313E Specification 90 VAC 132 VAC Input 34 V, 370 mA Output Application Down Light LED Driver Author Applications Engineering Department Document RDR-347 Number Date February 11, 2013 Revision 1.2 Summary and Features High efficiency, 86% at 120 VAC Low cost Single-stage converter Single sided PCB Low component count Works with a wide rand of leading edge and trailing edge TRIAC dimmers Wide dimming range No pop-on, reduced dead band and very fast start-up Enhanced user experience Flicker-free, fast monotonic start-up (<250 ms) no perceptible delay Thermal fold back prevents shut off in high output temperatures Integrated protection and reliability features Output open circuit / output short-circuit protected with auto-recovery Line input overvoltage shutdown extends voltage withstand during line faults Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board IEC 61000-4-5 ring wave, IEC 61000-3-2 C combination and EN55015 B conducted EMI compliant Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-347 12.6 W Dimmable LED Driver Using LYT4313E 11-Feb-13 PATENT INFORMATION The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at <