RDK-193 Power Integrations

Reference Design Report for a High Efficiency (81%), High Power Factor (>0.9) TRIAC Title Dimmable 7 W LED Driver Using TYP LinkSwitch -PH LNK403EG Specification 90 VAC 265 VAC Input 21 V , 0.33 A Output TYP Application LED Driver Author Applications Engineering Department Document RDR-193 Number Date June 9, 2010 Revision 1.0 Summary and Features Superior performance and end user experience o TRIAC dimmer compatible (including low cost leading edge type) No output flicker >1000:1 dimming range o Clean monotonic start-up no output blinking o Fast start-up (<100 ms) no perceptible delay o Consistent dimming performance unit to unit Highly energy efficient o 81% at 115 VAC, 82% at 230 VAC Low cost, low component count and small printed circuit board footprint solution o No current sensing required o Frequency jitter for smaller, lower cost EMI filter components Integrated protection and reliability features o Output open circuit / output short-circuit protected with auto-recovery o Line input overvoltage shutdown extends voltage withstand during line faults. o Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board o No damage during brown-out or brown-in conditions Meets IEC 61000-4-5 ringwave, IEC 61000-3-2 Class C harmonics and EN55015 B conducted EMI Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-193 7 W PAR20 LED Driver Using LNK403EG 09-Jun-10 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 <