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ev40 68 - s - 0 0a 108vac~ 132vac/60hz , 50v/140ma low cost, small form factor high pfc off - line dimmable led driver evaluation board ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 1 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. description the ev4068 - s - 0 0a evaluation board is designed to demonstrate the capabilities of mp 4068 . the mp4068 is a highly integrated triac dimmable led driver with high power factor. it is specifically designed for low - line input (120vac), no - isolated, t riac - dimmable led lighting applications, especially for the low cost and small form factor applications. the integrated 500v mosfet ensures the system to withstand 500v surge test without mov or tvs. only a single winding inductor is required to realize th e solution. it features mpss proprietary hybrid operation mode which is designed to achieve good dimming performance. the ev4068 - s - 00a is typically designed for driving an 7w triac dimmable led bulb with 50v typ , 140ma led load from 108vac to 132vac, 60hz. the ev4068 - s - 00a has an excellent efficiency and meets iec61547 surge immunity, iec61000 - 3 - 2 class c harmonics and en55015 conducted emi requirements. it has multi - protection function as over - voltage protection; output short - circuit protection, thermal sh ut down, etc. electrical specifica tion parameter symbol value units input voltage v in 108 to 132 v ac output voltage v out 50 v led current i led 140 ma output power p out 7 w efficiency (full load) >84 % power factor pf >0.9 thd thd <41 % features ? excellent triac dimming performance ? lowest cost bom ? constant current led driver ? good led current accuracy ? 500v mosfet integrated ? internal hv fast start - up ? single winding inductor ? high power factor(>0.9) ? high efficiency (>84%) ? led current foldback at hig h temperature ? thermal shutdown (auto restart with hysteresis) ? vcc under v oltage lockout with hysteresis (uvlo) ? programmable over voltage protection ? output short circuit protection ? fit inside gu10 bulb enclosure applications ? solid state lighting ? industrial & commercial lighting ? residential lighting all mps parts are lead - free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. mps and the future of analog ic technology, are registered trademarks of m onolithic power systems, inc. warning: although this board is designed to satisfy safety requirements, the engineering prototype has not been agency approved. therefore, all testing should be performed using an isolation transformer to provide the ac in put to the prototype board.
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 2 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. ev4068 - s - 00a evaluation board (l x w x h) 35mm x 23mm x 15mm board number mps ic number ev4068 - s - 00a mp4068gs evaluation board sch ematic figure 1 schematic es1j/600v/1a d1 330uf/63v c4 1.1/0805/1% r3 2.2uf/10v c1 led+ led- 18k r1 499k r2 51k/0805 r6 ee10/1mh l2 3.3uf/100v/1206 c6 100k/0805 r4 u1 mp4068gs dsf1j 600v/1a d3 50v/140ma dsf1j 600v/1a d2 10mh/15 l1 l n 220nf/450v c3 330nf/10v c5 200/1w r5 68pf/630v/1206 c2 10k/0805 r7 600v/0.5a mb6s bd1 108vac-132vac tvr07241 rv1 250v/1a f1 30k r8 51k r9 ssn1n45bta q1 450v/0.5a 1m/0.25w r10 20/0805/1% r11
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 3 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. pcb layout (single - side d ) figure 2 top layer f igure 3 bottom layer
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 4 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. circuit description the ev4068 - s - 00a is configured in a single - stage buck topology and gets a cost effective bom. it also achieves high power factor and excellent triac dimming performance. f1, rv1, l1, r7, c2, and bd1 compose the input stage. f1 fuses the ac input to protect for the component failure or some excessive short events. rv1 is used for surge test. l1, r7 and c2 form an emi filter. the diode rectifier bd1 rectifies the input line voltage. c7, l3 and c3 form a structur e emi. r12, c8 are used as a bleeder circuit which keeping the triac current above the minimum holding current after triac turns on. r8, r9, r10, r5, q1 with c5 compose the active damping circuit. it helps to reduce the inrush current through dimmer at the moment dimmer turning on. the circuit let the inrush current flow through r5 at the moment triac dimmer turning on. then q1 turns on and shorts r5, this saves power loss from r5. the r10 connected from bus provides a bias voltage for the gate driver of q1 , which also save power loss of q1. r4, d2, c1 and c6 are used to supply the power for mp4068. at normal work, the power is charged by the internal high voltage regulator from hv pin. but in deep dimming condition, the power may not be enough supplied onl y by the high voltage regulator, the diode d2 connected to output will help maintain the power supply voltage. r1 and r2 are used to monitor the output ovp condition. the ovp voltage is set by the divider ratio of r1 and r2. r3, r11 are sensing resistors f or led current control. the value of r3 and r11 set the output led current. diode d1 is the buck fly - wheel diode, the inductor l2 and the capacitor c4 are the output filter. the resistor r6 is placed as a dummy load to consume the output power in open lo ad condition. the diode d3 is used to prevent the output current flowing back to ic when input sine voltage drops lower than output voltage.
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 5 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. ev4068 - s - 00a bill of materials qty ref value description package manufacturer manufacture_p/n 1 c1 2.2f/10v cera mic cap, 10v, x7r 0603 murata grm188r71a225ke15d 1 c2 68pf/630v ceramic cap, 630v, c0g 1206 murata grm31a7u2j680jw31d 1 c3 220nf/450v cbb, 450v dip fara c222s224k31c000 1 c4 330f/63v electrolytic capacitor, 63v dip jianghai cd263 - 63v330 1 c5 330nf/10v ceramic cap, 10v, x7r 0603 hhec c0603x334k010t 1 c6 3.3f/100v ceramic cap, 100v, x7s 1206 tdk c3216x7s2a335k 1 bd1 mb6s rectifier bridge, 600v, 0.5a soic - 4 taiwan semiconductor mb6s 1 d1 es1j diode, 1a, 600v sma taiwan semiconductor es1j 2 d2, d3 dsf 1j diode, 1a, 600v sod - 123fl sxy dsf1j 1 f1 250v/1a fuse dip little fuse 39211000000 1 l1 10mh inductor dip hulsin hdr0810 - 103k - n5 1 l2 1mh inductor, 0.23mm, 180 turns ee10 emei 1 q1 ssn1n45b ta n - channel mosfet to - 92 fairchild ssn1n45bta 1 r1 18k t hick film chip res, 1% 0603 yageo rc0603fr - 0718kl 1 r2 499k thick film chip res, 1% 0603 yageo rc0603fr - 07499kl 1 r3 1.1 thick film chip res, 1% 0805 yageo rc0805fr - 071r1l 1 r11 20 thick film chip res, 1% 0805 yageo rc0805fr - 0720rl 1 r4 100k thick film chip res, 5% 0805 yageo rc0805jr - 07100kl 1 r5 200/1w metal film res, 1w, 5% dip any 200/1w 1 r6 51k thick film chip res, 5% 0805 yageo rc0805jr - 0751kl 1 r7 10k thick film chip res, 5% 0805 yageo rc0805jr - 0710kl 1 r8 30k thick film chip res, 1 % 0603 yageo rc0603fr - 0730kl 1 r9 51k thick film chip res, 1% 0603 yageo rc0603fr - 0751kl 1 r10 1m/0.25w metal film res, 1w, 5% dip any 1m/0.25w 1 rv1 tvr07241 mov dip tks tvr07241
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 6 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. ev4068 - s - 00a bill of materials (continued) qty ref value description package manufacturer manufacture_p/n 1 jr1 0 thick film chip res, 5% 0805 yageo rc0805jr - 070rl 1 u1 mp4068gs triac - dimmable led lighting controller soic8 - 7 mps mp4068s - cu10 r4 4 l,n, led +,le d_ 1.0 1.0
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 7 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. transformer specific ation electrical diag ram figure 4 transformer electrical diagram winding diagram figure 5 winding diagram pin side pin side 3ts n 1 1t
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 8 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. winding order winding no. tape layer number start & end magnet wire (mm) turns 1 n 1 3 81 0.23mm * 1 180 e lectrical specifications electrical strength 60 second, 60hz, from winding to core. 1000vac primary inductance pins 1 - 8, all other windings open, measured at 100khz, 0.1 vrms 1mh8% materials item description 1 core: ee10, ui=250025%, al=221.5h/n 22% gap, acme p4 or equivalent 2 bobbin: ee10, 4+4pin rmmove pin2,3,4,6,7 3 wire: 0.23mm, 2uew, class f or equivalent 4 tape: 6.5mm(w)0.06mm(th) 5 varnish: john c. dolph co, bc - 346a or equivalent 6 solder bar: chen nan: sn99.5/cu0.5 or equivalent
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 9 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. evb test results performance data efficiency, pf and thd f (hz) vin(v) pin(w ) vo(v) io(ma) po(w) efficiency (%) pf thd (%) 60 108 7.64 48.4 133 6.44 84.3 0.954 30.9 120 8.08 48.8 141 6.88 85.2 0.94 35.6 132 8.44 49 147 7.20 85.3 0.923 40.5 dimming compatibility (no flicker with these 31 different dimmers) dimmer no. manufac turer part no. power stage imax (ma) imin (ma) 1 lutron q - 600p - iv 600w incandescent 126 7 2 lutron cn - 600p 600w 109 2 3 lutron ay - 600p 600w 109 2 4 lutron slv - 600p 600w 110 2 5 lutron lg - 600p 600w 110 2 6 lutron 6b38 - q - 600p 600w 111 2 7 lutron gl - 6 00h - dk 600w incandescent 119 1 8 leviton 1g40o5 600w 111 0 9 leviton 1i20o5 600w 127 0 10 leviton 6633 - p 600w 126 0 11 lutron 6b38 - s - 600p 600w 108 2 12 lutron ct - 600p 600w 105 4 13 lutron 6b38 - s - 603pg 600w 84 1 14 lutron 6b38 - dv - 600p 600w 105 4 15 lutron dvcl - 153p 600w 100 31 16 lutron 6b38 - dvlv - 600p 600w 107 5 17 leviton 1l10o5 600w 109 2 18 lutron gls01 - c06570 600w 82 0 19 lutron dv - 600p - br 600w incandescent 106 3 20 leviton 6613 - pl 600w magnetic low voltage 125 1 21 leviton c20 - 6684 - iw 600w incandescent 131 1 22 lutron ay - 600p - la 600w incandescent 111 3 23 lutron tg - 600ph - wh 600w 108 4 24 lutron tg - 603gh - wh 600w 79 4 25 lutron s - 600 600w 117 2 26 lutron dvpdc - 203p - wh 200w for philips dimmable cfl 115 45 27 lutron s - 600p 600w 105 2 28 lutron 6b38 - dv - 603pg 600w 83 3 29 lutron dng - 603ph - wh 400w 100 0 30 cooper 6b28 600w 113 1 31 leviton 6633 - p - 1g10o5 600w 125 2
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 10 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. electric strength test input and output was shorted respectively. 3750vac/50hz sine wave applied between input and output fo r 1min, and operation was verified. surge test line to line 500v surge testing was completed according to iec61547. input voltage was set at 120vac/60hz. output was loaded at full load and operation was verified following each surge event. surge level (v) input voltage (vac) injection location injection phase () test result (pass/fail) 500 120 l to n 90 pass - 500 120 l to n 270 pass thermal test test without dimmer and with dimmer at 50% dimming on phase. w ithout dimmer without dimmer with dimmer at 50% dimming on phase with dimmer at 50% dimming on phase chip: 67.5 transformer: 57.4 chip: 54.2 damping mos : 66.6
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 11 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in =120vac/60hz, 16 leds in series , i led =140ma, v out =50v, l=1mh.
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 12 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in =120vac/60hz, 16 leds in seri es , i led =140ma, v out =50v, l=1mh.
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 13 10/28/2015 mps proprietary information. patent protected . unauthorize d photocopy and duplication prohibited. ? 2015 mps . all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in =120vac/60hz, 16 leds in series , i led =140ma, v out =50v, l=1mh.
ev 40 68 - s - 0 0a C low line voltage, 7 w low cost dimmable led driver notice: the information in this document is subject to change without notice. users should warrant and guarantee that third party intellectual property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. ev4068 - s - 00a rev. 1.0 www.monolithicpower.com 14 10/28/2015 mps proprietary information. patent protected . unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. quick start guide 1. preset ac power supply to 108 v ac ? v in ? 132 v ac . 2. turn power supply off. 3. connect the led string between led+ (anode of led string) and led - (cathode of led string). 4. connect power supply terminals to ac v in terminals (l and n) as shown on the board. 5. turn ac power supply on after making connections.

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