EV8124-D-00A 500ma, lnb power supply and control regulator evaluation board EV8124-D-00A rev.1.0 www.monolithicpower.com 1 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. the future of analog ic technology description EV8124-D-00A evaluation board is designed to demonstrate the capability of mp8124. mp8124 is a highly integrated voltage regulator to provide efficient, low noise power and the interface signals to a satellite receiver?s low noise block (lnb). it generates 22khz tone signal compatible with diseqc 1.x. the mp8124 integrates a current-mode boost regulator followed by a tracking linear regulator. the boost regulator provides a clean power source which is 1v higher than the final output voltage while the tracking linear regulator protects the output against overloads or shorts . the mp8124 provides a number of features including bus voltage selection, over current protection and 22khz tone shaper from external signal. it offers a simple solution with low component count and high efficiency. the mp8124 is available in a 14-pin qfn (2x3mm) package. electrical specification paramete r symbol v alue units input voltage v in 8 ? 14 v output voltage v out 19 v output current i out 0-0.5 a features ? compatible with diseqc 1.x ? 600ma accurate current limit ? 8v-to-14v input voltage ? 40v output voltage rating ? low-noise ldo output ? high efficiency for light load, >85% at 40ma ? high frequency for small component size ? build in 22khz signal shaper ? selectable output voltage ? ocp, scp protection ? boost ovp protection ? over temperature protection ? 14pin qfn-14 (2mmx3mm) package packageapplications ? lnb power supply and control for satellite set top boxes ? tv satellite receivers ? pc card satellite receivers 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. EV8124-D-00A evaluation board (l x w x h) 6.35cm x 6.35cm x 0.6cm board numbe r mps ic numbe r EV8124-D-00A mp8124gd
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 2 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evaluation board schematic EV8124-D-00A bill of materials qty re f v alue description package manufacture r part numbe r 3 c1a, c2a, c2b 10uf ceramic cap, 25v,x7r 1210 murata grm32dr71e106ka12l 3 c1b, c3, c4 0.1uf ceramic cap,50v,x7r 0603 murata grm188r71h104ka93d 1 c5 0.22uf ceramic cap,25v,x7r 0603 murata grm188r71e224ka88d 1 c6 22nf ceramic cap,25v,x7r 0603 murata grm188r71e223ka01d 1 c7 3.3nf ceramic cap,50v,x7r 0603 murata grm188r71h332ka01d 1 r1 60.4k film resistor, 1% 0603 royal rc0603fr-0760k4l 1 r2 249k film resistor, 5% 0603 royal rc0603jr-07249kl 4 r3, r4, r5, r6 100k film resistor, 5% 0603 royal rc0603jr-07100kl 1 d1 b340 40v,3a, schottky diode sma diode inc b340a 1 d2 dfls240l 40v,2a, schottky diode powerdi123 diode inc dfls240l-7 0 d3 ns 1 l1 10 h 4.3a, 27m ? inductor smd wurth 744 771 410 0 1 u1 mp8124 lnb power supply and control regulator qfn-14 (2mmx3mm) mps mp8124gd
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 3 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results v in = 12v, v out = 19v, l = 10h, t a = 25oc, unless otherwise noted.
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 4 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results (continued) v in = 12v, v out = 19v, l = 10h, t a = 25oc, unless otherwise noted.
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 5 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results (continued) v in = 12v, v out = 19v, l = 10h, t a = 25oc, unless otherwise noted.
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 6 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results (continued) v in = 12v, v out = 19v, l = 10h, t a = 25oc, unless otherwise noted.
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 7 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. evb test results (continued) v in = 12v, v out = 19v, l = 10h, t a = 25oc, unless otherwise noted.
EV8124-D-00A ?500ma, lnb power supply and control regulator EV8124-D-00A rev.1.0 www.monolithicpower.com 8 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV8124-D-00A ?500ma, lnb power supply and control regulator 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. EV8124-D-00A rev.1.0 www.monolithicpower.com 9 11/5/2014 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. quick start guide the output voltage of this board is set to 19v. the board layout accommodates most commonly used components. 1. preset power supply to 8v v in 14v. 2. turn power supply off. 3. connect power supply terminals to: a. positive (+): vin b. negative (?): gnd 4. connect load to: a. positive (+): vout b. negative (?): gnd 5. turn power supply on after making connections. 6. the mp8124 is enabled on the evaluation board once vin power is turned on. 7. to use the enable function, apply a logic high input to the en pin. set en higher than 2v to turn on the regulator or lower than 0.8v to turn it off. 8. to generate tone signal on output, apply a logic signal with 22khz frequency to the extm pin. the signal high level should be higher than 2v and the low level should be lower than 0.8v. 9. to adjust the output voltage, apply a logic input on 13v/18v pin or linedrop pin. the output voltage under different conditions is shown in below table. ?high? represents a voltage higher than 2v, ?low? represents a voltage lower than 0.8v. 13/18v linedrop vout high high 19v high low 18v low high 14v low low 13v 10. the soft start time is adjusted by c6. for further information, please refer to mp8124 datasheet.
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