EV4050A-S-00A universal input, 40v/115ma off-line non-isolated led driver evaluation board EV4050A-S-00A rev.1.0 www.monolithicpower.com 1 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. the future of analog ic technology description the mp4050a is a constant current led driver with an integrated 500v mosfet. it is designed specifically for energy efficient and low-cost led bulb replacement applications. the EV4050A-S-00A evaluation board is designed to demonstrate the capabilities of mp4050a as an off-line, non-isolated led driver which can load 40v/115ma leds in universal input voltage (85vac to 265vac, 50hz/60hz). the EV4050A-S-00A has an excellent efficiency and meets iec61000-4-5 surge immunity and en55015 conducted emi requirements. it has various protections, like integrated thermal current foldback, vcc under-voltage lockout (uvlo), open led protection (olp), short-circuit protection (scp), and over-temperature protection (otp). all of there features make mp4050a an ideal solution for simple, off-line and non-isolated led applications. electrical specification parameter symbol value units input voltage v in 85 to 265 vac output voltage v out 40 v output current i out 115 ma efficiency >85 % features ? constant current led driver ? integrated 500v/8 ? mosfet ? low vcc operating current ? maximum frequency limit ? audible noise restrain ? internal high-voltage current source ? internal 200ns leading edge blanking ? integrated thermal current foldback ? thermal shutdown (auto restart with hysteresis) ? vcc under voltage lockout with hysteresis ? open led protection ? short circuit protection ? auto-restart function applications ? ac/dc or dc/dc led driver application ? general illumination ? industrial lighting ? automotive/decorative led lighting all mps parts are lead-free, halogen free, and adhere to the rohs directive. for mps green status, pl ease visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic 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 input to the prototype board.
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 2 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. EV4050A-S-00A evaluation board top view bottom view (l x w x h) 29mm x 19mm x 18mm board number mps ic number EV4050A-S-00A mp4050ags evaluation board schematic nc 8 nc 6 vcc 1 pro 2 gnd 3 source 4 nc 5 drain 7 u1 mp4050ags wugc10jh/600v/1a d1 47uf/50v c4 1mh/0.1a l1 10/1w fr1 4.7uf/400v c3 4.7uf/400v c2 40v/0.115a 3.3/1%/1206 r3 10k/0805 r5 2.2uf/10v c1 led+ led- l n 3.3/1%/1206 r4 mb6s/600v/0.5a bd1 15.4k/1% r1 330k/1%/1206 r2 200k r6 4.7mh/0.24a l2 51pf/50v c5 figure 1?schematic
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 3 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. pcb layout (single-sided) figure 2?top layer figure 3?bottom layer
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 4 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. circuit description the EV4050A-S-00A is configured to deliver a constant 115ma current at an output voltage of 40vdc. the evb is designed for driving leds with a constant current (cc) in high-side buck topology. the simplicity and low component count of EV4050A-S-00A make the demo board ideal for space constrained and cost sensitive application such as gu10 size lamps. fr1 and bd1 compose the input stage. fr1 is used to protect for the component failure or some excessive short events, also it can restrain the inrush current. c2 l1 and c3 compose filter to guarantee the conducted emi meet standard en55015. c2 and c3 are also used for energy storage reducing line noise and protecting against line surge. r5 is an optional parallel resistor on the board across l1 which damps the resonance of the filter. c1 is the vcc supply capacitor which should be located near as ic and such as several f is enough. r3, r4 are the sense resistor with 1% tolerance for good output current precision. it?s also recommended to use 400ppm/ ? c temperature coefficient type for better output current regulation in high temperature and low temperature. c5 is decoupling cap to decouple the voltage noise spike in high side buck solution. around 30pf is suggested to use for stable operation. d1 is the freewheeling diode with ultrafast type. the recovery time of <75ns should be used which slow diodes cause excessive leading edge current spike during star-up and affect the efficiency. ultrafast (t rr <75ns) diode such as wugc10jh or egc10gh are recommended. r1 and r2 are the divided resistors which detect the output voltage for fault protection. it?s suggested to use the 1% tolerance. the upper divided resistor r2 is recommended to have a minimum size of smd 1206 package. the pro pin time constant should be less than 1s which is related with r1 and r2 value. l2 is the power inductor which could use the low cost drum core. however, drum core have the open magnetic path which can be shored by a metal enclosure which reduces the effective inductance and requires the value to be adjusted to take this into account when placed inside the final enclosure. c4 is the output filter capacitor which is to smooth the inductor current and limit the output current ripple and ensure high frequency current flow within as small as a loop area as possible to reduce emi. 105 ? c or above rated capacitor should be choose in small size application for long life. the dummy load r6 is used to regulator the output voltage within the designed value in open lamp protection.
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 5 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. EV4050A-S-00A bill of materials qty ref value description package manufacturer manufacturer_p/n 1 c1 2.2f ceramic capacitor, 10v, x7r 0603 murata grm188r71a225ke15d 2 c2, c3 4.7f capacitor;400v;20% dip beryl 4.7f/400v 1 c4 47f capacitor;50v;20% dip jianghai cd263-50v47 1 c5 51pf ceramic capacitor, 50v, c0g 0603 tdk c1608c0g1h510jt 1 bd1 mb6s diode;600v;0.5a soic-4 taiwan semicondutor mb6s 1 d1 wugc10jh diode;600v;1 a sma diodes wugc10jh 1 fr1 10 ? resistor;5%;1w dip yageo fkn1wsjt-52-10r 1 l1 1mh inductor;100ma dip bangdayuan ckl0510-102 1 l2 4.7mh inductor;240ma dip wurth 7447724472 1 r1 15.4k ? film resistor;1% 0603 yageo rc0603fr-0715k4l 1 r2 330k ? film resistor;1% 1206 yageo rc1206fr-07330kl 2 r3, r4 3.3 ? film resistor;1% 1206 yageo rc1206fr-073r3l 1 r5 10k ? film resistor;5% 0805 yageo rc0805jr-0710kl 1 r6 200k ? film resistor;5% 0603 yageo rc0603jr-07200kl 1 u1 mp4050ags constant current led driver soic-8 mps mp4050ags-z
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 6 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results performance data t a =+25c, unless otherwise noted. surge test line to line 1kv surge testing is completed according to iec61000-4-5. input voltage is 220vac/50hz and operation is verified as following each surge event. surge level (v) input voltage (vac) injection location injection phase () test result (pass/fail) 1000 220 l to n 0 pass -1000 220 l to n 0 pass 1000 220 l to n 90 pass -1000 220 l to n 90 pass 1000 220 l to n 180 pass -1000 220 l to n 180 pass 1000 220 l to n 270 pass -1000 220 l to n 270 pass
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 7 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. conducted emi test EV4050A-S-00A comply the en55015 requirement.
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 8 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in =115vac/60hz, v out =40v, i led =115ma, t a =25c, unless otherwise noted. v ds 100v/div. i l 100ma/div. i l 100ma/div. v bus 100v/div. v source 50v/div. i l 100ma/div. v out 10v/div. i l 100ma/div. v out 20v/div. i l 100ma/div. v out 20v/div. v bus 100v/div. i l 100ma/div. i out 10ma/div. i out 50ma/div. v bus 100v/div. i out 50ma/div. steady state output current ripple soft start turn on delay shutdown short circuit protection short circuit protection entry & recovery open led protection entry open led protection recovery
EV4050A-S-00A ? off line, non-isolated led driver EV4050A-S-00A rev.1.0 www.monolithicpower.com 9 4/28/2015 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in =230vac/50hz, v out =40v, i led =115ma, t a =25c, unless otherwise noted. v ds 100v/div. i l 100ma/div. v bus 100v/div. i l 100ma/div. v out 20v/div. i l 100ma/div. v out 20v/div. v bus 100v/div. i l 100ma/div. i out 50ma/div. v bus 100v/div. i out 50ma/div. steady state output current ripple soft start turn on delay shutdown short circuit protection short circuit protection entry & recovery open led protection entry open led protection recovery v out 10v/div. i l 100ma/div. v source 100v/div. i l 50ma/div.
EV4050A-S-00A ? off line, non-isolated led driver notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV4050A-S-00A rev.1.0 www.monolithicpower.com 10 4/28/2015 mps proprietary information. patent protect ed. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. quick start guide 1. preset power supply to 85vac ? v in ? 265vac. 2. turn power supply off. 3. connect the line and neutral terminals of the power supply output to l and n port. for three- wire input application, make led- connected to earth. 4. connect load to: a. positive (+): led+ b. negative (?): led- 5. turn power supply on after making connections.
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