ev8714-le-00a high efficiency,10a,17v, synchronous step-down converter evaluation board ev8714-le-00a rev.1.0 www.monolithicpower.com 1 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. the future of analog ic technology description the ev8714-le-00a is used for demonstrating the performance of mps?s mp8714. mp8714 is a highly integrated and high frequency synchronous step-down switch-mode converter. it is optimized to support up to 10a load current over an input supply range from 4.5v to 17v with excellent load and line regulation. current-mode operation provides fast transient response and eases loop stabilization. en/sync supports external clock synchronization, and an open-drain power good pin(pg) indicates when the output voltage is in the nominal range. full protection features include over voltage, hiccup over-current protection and thermal shut down. the mp8714 is available in qfn- 14(3mmx4mm) package. electrical specification parameter symbol value units input voltage v in 4.5? 17 v output voltage v out 1 v output current i out 10 a features ? wide 4.5v-to-17v operating input range ? 10a continues output current ? 26m ? high-side, 11m ? low-side rds(on) for internal power mosfets ? 200khz-2mhz synchronized external clock ? programmable soft-start(ss) time ? open-drain power good(pg) indicator ? output over-voltage protection (ovp) ? thermal shutdown ? available in a small qfn-14(3mmx4mm) package applications ? flat-panel televisions and monitors ? set-top boxes ? distributed power systems a ll mps parts are lead-free, halogen free, and adhere to the rohs directive. fo r mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks o f monolithic power systems, inc. ev8714-le-00a evaluation board board number mps ic number ev8714-le-00a MP8714GLE 0.01 30 40 50 60 70 80 90 100 0.10 1.00 10.00
ev8714-le-00a ? 10a high efficiency sync. step down converter ev8714-le-00a rev.1.0 www.monolithicpower.com 2 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evaluation board schematic 9 5 c3 0.47 f r4 100k r2 120k r3 51k c1a 22f c1b 0.1f r5 0 c5 0.1f r1 80.6k l1 1.5h c6 22pf c4 22nf vin 4.5v-17v pg vout 1v/10a 13 7 4 3 6 14 8 12 11 10 2 1 en r6 10 c2 22f c2a 22f c2b 22f c2c 22f c2d ns c1 22f c1c ns ev8714-le-00a bill of materials qty refdes value description package manufacturer manufacturer p/n 1 r1 80.6k film res,1% 0603 royal rc0603fr-0780k6l 1 r2 120k film res,1% 0603 royal rl0603fr-07120kl 1 r3 51k film res,1% 0603 royal rl0603fr-0751kl 1 r4 100k film res,1% 0603 royal rl0603fr-07100kl 1 r5 0 ? film res,1% 0402 ralec rtt020000ftp 1 r6 10 ? film res,1% 0603 royal rl0603fr-0710rl 2 c1b, c5 0.1 f ceramic cap,25v,x7r 0603 murata grm188r71e104ka01d 2 c1a, c1 22 f ceramic cap,25v,x5r 1206 murata grm31cr61e226ke15l 4 c2, c2a, c2b, c2c 22 f ceramic cap 25v,x5r 0805 murata grm21br61e226me44l 2 c2d, c1c ns 1 c3 0.47 f ceramic cap,16v,x7r 0603 murata grm188r71c474ka88d 1 c4 22nf ceramic cap,16v,x7r 0603 murata grm188r71c223ka01d 1 c6 22pf ceramic cap,50v,c0g 0603 murata grm1885c1h220ja01d 1 l1 1.5 h ir=11a,isat=14a, dcr=6.6m ? smd wurth 744 311 150 1 u1 mp8714 step-down converter qfn14 (3*4) mps MP8714GLE
ev8714-le-00a ? 10a high efficiency sync. step down converter ev8714-le-00a rev.1.0 www.monolithicpower.com 3 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, t a = 25c, unless otherwise noted. v out 500mv/div. v pg 5v/div. v sw 10v/div. i l 10a/div. v out 500mv/div. v pg 5v/div. v sw 10v/div. i l 10a/div. v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 5a/div. v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 10a/div. v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 5a/div. v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 10a/div. v out 500mv/div. v pg 5v/div. v in 10v/div. v sw 10v/div. i l 5a/div. v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 5a/div. v out 500mv/div. v pg 5v/div. v en 5v/div. v sw 10v/div. i l 10a/div.
ev8714-le-00a ? 10a high efficiency sync. step down converter ev8714-le-00a rev.1.0 www.monolithicpower.com 4 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the evaluation board. v in = 12v, v out = 1v, l = 1.5h, t a = 25c, unless otherwise v out /ac 10mv/div. v out /ac 100mv/div. v in /ac 100mv/div. v sw 10v/div. i l 5a/div. v out /ac 10mv/div. v in /ac 10mv/div. v sw 10v/div. i l 500ma/div. shutdown through input voltage i out = 10a input/output ripple i out = 10a input/output ripple i out = 0a, pfm load transient response i out = 5a to 10a v out 500mv/div. v pg 5v/div. v in 5v/div. v sw 10v/div. i l 10a/div. i l 5a/div.
ev8714-le-00a ? 10a high efficiency sync. step down converter ev8714-le-00a rev.1.0 www.monolithicpower.com 5 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. printed circuit board layer figure 1: top silk layer figure 2: top layer figure 3: inner 1 layer figure 4: inner 2 layer figure 5: bottom layer
ev8714-le-00a ? 10a high efficiency sync. step down converter 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. ev8714-le-00a rev.1.0 www.monolithicpower.com 6 12/22/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. quick start guide 1. connect the positive and negative terminals of the load to the vout and gnd pins, respectively. 2. preset the power supply output between 4.5v and 17v, and then turn off the power supply. 3. connect the positive and negative terminals of the power supply output to the vin and gnd pins, respectively. 4. turn the power supply on. the board will automatically start up. 5. to use the enable function, apply a digital input to the en pin. drive en higher than 1.5v to turn on the regulator, or less than 1.03v to turn it off.
|
