EV8760D-L-00A high efficiency, 6a, 18v synchronous, step-down converter evaluation board EV8760D-L-00A rev.1.0 www.monolithicpower.com 1 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. the future of analog ic technology description the EV8760D-L-00A is an evaluation board for the mp8760dgl, a high-efficiency, monolithic, synchronous, step-down converter with output discharge function. the ev board can deliver a continuous 6a load current over an 8v-to-18v operating input range. the ev board can achieve high efficiency over a wide output current load range. constant-on-time (cot) control provides fast transient response and eases loop stabilization. this ev board can be turned on or shut down via a remote on/off input that is referenced to ground. this input is compatible with popular logic devices. electrical specification paramete r symbol v alue units input voltage v in 8 ? 18 v output voltage v out 1.8 v output current i out 6 a features ? wide 8v-to-18v operating input range ? 6a output current ? low r ds(on) internal power mosfets ? proprietary, switching-loss-reduction technique ? adaptive cot for ultrafast transient response ? programmable soft start and shutdown time ? pre-bias start-up ? programmable switching frequency from 200khz to 1mhz ? non-latch ocp, ovp, and thermal shutdown ? output adjustable from 0.611v to 13v ? available in a qfn34 package applications ? storage ? set-top boxes ? xdsl modem/dslam ? small-cell base stations ? personal video recorders ? flat-panel televisions and monitors ? distributed power systems a ll mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under products, quality assurance page. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. EV8760D-L-00A evaluation board (l w h) 85.5mm 85.5mm 1.6mm board numbe r mps ic numbe r EV8760D-L-00A mp8760dgl 0.01 0.1 1 10 50 55 60 65 70 75 80 85 90 95 100
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 2 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evaluation board schematic ns c7 1 c1b 0. c1c 220nf c6 c5 ns c8 499k r5 100k r6 634k r7 100k r8 1 c1a vin vin gnd en pgood vcc 0.1 c1d 0.1 c3 150pf c4 4.7 r3 2m r4 20k r1 10k r2 2k r9 2.2 l1 gnd 1 2 ns c2a vout sw 1 vout 1 gnd1 4 c2b 4 c2c 4 c2d 0.1 c2e fb sw gnd sw sw 15, 16 pgn d in vcc 7 ag n d 5 freq 2 fb 3 ss 4 en 1 pg 6 bst 8 9,14 mp8760d in pgn d 10,11, 12,13 u1 mp8760d
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 3 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. EV8760D-L-00A bill of materials qty ref value description package manufacture manufacture_pn 2 c1a, c1b 10 f ceramic capacitor; 35v;x7r;1210; 1210 murata grm32er7ya106ka12l 4 c1c, c1d, c2e, c3 0.1 f ceramic capacitor; 50v;x7r;0603 0603 murata grm188r71h104ka93d 0 c2a ns poscap 3 c2b, c2c, c2d 47 f ceramic capacitor; 6.3v;x5r;1206 1206 tdk c3216x5r0j476m 1 c4 150pf ceramic capacitor; 50v;cog;0603 0603 murata grm1885c1h151ja01d 1 c5 1 f capacitor;25v;x7r 0603 murata grm188r71e105ka12 1 c6 220nf ceramic capacitor; 25v;x7r;0603 0603 murata grm188r71e223ja01d 0 c7, c8 ns 0603 1 l1 2.2 h inductor;2.2 h;3.05m ? ;23a smd wurth 7443330220 1 r1 20k film resistor;1% 0603 yageo rc0603fr-0720kl 1 r2 10k film resistor;1%; 0603 yageo rc0603fr-0710kl 1 r3 4.7 ? film resistor;5% 0603 yageo rc0603jr-074r7l 1 r4 2m film resistor;5%; 0603 yageo rc0603jr-072ml 1 r5 499k film resistor;1% 0603 yageo rc0603fr-07499kl 2 r6, r8 100k film resistor;1%; 0603 yageo rc0603fr-07100kl 1 r7 634k film resistor;1% 0603 yageo rc0603fr-07634kl 1 r9 2k film resistor;1%; 0603 yageo rc0603fr-072kl 1 u1 step down converter qfn16 3x4 mps mp8760dgl
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 4 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results performance waveforms are tested on the EV8760D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 2.2h, t a = +25c, unless otherwise noted. i out (a) load regulation vs. i out v in =12v line regulation vs. input volatage i out =0.01a input voltage(v) -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0123456 efficiency vs. output current @500khz, v out =1.8v 0.01 0.1 1 10 output current (a) 50 55 60 65 70 75 80 85 90 95 100 v in =8v v in =16v v in =12v -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 8 9 10 11 12 13 14 15 16 17 18
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 5 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the EV8760D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 2.2h, t a = +25c, unless otherwise noted. v in ac coupled 50mv/div. v sw 5v/div. v out ac coupled 50mv/div. i l 5a/div. v in ac coupled 50mv/div. v sw 10v/div. v out ac coupled 50mv/div. i l 5a/div. v in ac coupled 200mv/div. v sw 10v/div. v out ac coupled 50mv/div. i l 5a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 5a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v in 10v/div. v sw 10v/div. v out 1v/div. i l 5a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 5a/div.
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 6 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. evb test results (continued) performance waveforms are tested on the EV8760D-L-00A evaluation board. v in = 12v, v out = 1.8v, l = 2.2h, t a = +25c, unless otherwise noted. v en 2v/div. v sw 10v/div. v out 1v/div. i l 2a/div. v en 2v/div. v sw 10v/div. v out 1v/div. i l 5a/div. v sw 2v/div. v out 1v/div. i l 2a/div. v sw 10v/div. v out 1v/div. i l 2a/div. v sw 10v/div. v out 1v/div. i l 10a/div. v sw 10v/div. v out 1v/div. i l 10a/div. i out 2a/div. v en 2v/div. v pg 5v/div. v out 1v/div. v out (ac) 20mv/div. v en 2v/div. v pg 5v/div. v out 1v/div.
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board EV8760D-L-00A rev.1.0 www.monolithicpower.com 7 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 mps. all rights reserved. printed circuit board layout figure 1: top layer, silkscreen figure 2: top layer figure 3: inner layer 1 figure 4: inner layer 2 figure 5: bottom layer
EV8760D-L-00A ? 6a, 18v, synchronous, step-down, converter ev board notice: the information in this document is subject to change without notice. please contact mps for current specifications. 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. EV8760D-L-00A rev.1.0 www.monolithicpower.com 8 8/4/2015 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2015 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 8v and 18v, 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 mp8760dgl will automatically startup. 5. to use the enable function, apply a digital input to the en pin. drive en higher than 2v to turn on the regulator or less than 0.4v to turn it off. 6. use r1 and r2 to set the output voltage with vfb = 0.611v. follow the application information section in the device datasheet to select appropriate r1, r2, inductor, and output capacitor values when changing the output voltage.
|
