EV8126DF-00A 550ma, 8-14v input, lnb power supply and control voltage regulator evaluation board EV8126DF-00A rev. 1.0 www.monolithicpower.com 1 4/19/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology description the EV8126DF-00A is an evaluation board for mp8126, which is lnb power supply and control voltage regulator. the board provides efficient, low noise power to the satellite receiver?s rf lnb (low noise block) converter. the board accepts the supply voltage from 8v to 14v and the load current can be up to 550ma. the current limit can be adjustable with an external resistor. the board provides a number of features described in the european eutelsat specification (diseqc) including: voltage selection of horizontal or vertical polarization directions of lnb and a selectable v out compensation for voltage drop on the long coaxial cable. in accordance with diseqc standard, the part can detect 22khz signal and output it with the builtin amplitudes and rise/fall times. electrical specification parameter symbol value units input voltage v in 8-14 v output voltage v out 19 v output current i out 0-0.55 a features ? diseqc 1.x compatibility ? 8v to 14v input voltage ? up to 550ma output current ? programmable current limit ? 1v line drop compensation ? adjustable soft-start time ? pok indicator ? short circuit protection ? over temperature protection applications ? lnb power supply and control for satellite set top boxes all 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. EV8126DF-00A eval uation board efficiency (%) efficiency for 19v output 60 70 80 90 100 0.01 0.1 1 i out (a) (l x w x h) 2.9? x 2.9? x 0.4? 7.3cm x 7.3cm x 1cm board number mps ic number EV8126DF-00A mp8126df
EV8126DF-00A ? lnb power supply a nd control voltage regulator EV8126DF-00A rev. 1.0 www.monolithicpower.com 2 4/19/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. evaluation board schematic EV8126DF-00A bill of materials qty ref des value description package manufacturer manufacturer p/n 1 c1 10 f ceramic cap, x7r, 25v 1210 murata grm32dr71e106ka12 1 c2 22 f ceramic cap, x7r, 25v 1210 murata grm32er71e226ke15l 3 c3, c6, c8 0.1 f ceramic cap, x7r, 100v 0603 murata grm188r71h104ka93d 1 c4 0.22 f ceramic cap, x7r, 16v 0603 murata grm188r71c224ka01a 1 c5 47nf ceramic cap, x7r, 50v 0603 murata grm188r71h473ka61d 1 c7 22nf ceramic cap, x7r, 50v 0603 murata grm188r71223ka01d 0 c9 ns do not stuff 0603 1 c10 470pf ceramic cap, x7r, 50v 0603 murata grm188r71h471ka01d 1 c11 2.2 f ceramic cap, x7r, 50v 1206 murata grm31cr71h225ka88l 0 c12, c13 ns do not stuff 1210 1 r1 10k film res, 1% 0603 yageo rc0603fr-0710kl 5 r2, r3, r6, r7, r8 100k film res, 5% 0603 royalohm 0603j0104t5e 0 r4 ns do not stuff 0603 1 r5 4.7k film res, 5% 0603 yageo rc0603jr-074k7l 1 d1 30v, 2a sma diodes b230a 2 d2, d3 40v, 0.5a sod-123 diodes sdb0540 1 l1 22 h smd, 3a, 77.6m ? smd toko d104c-919as-220m 1 l2 1 h smd, 3.7a, 17m ? smd toko d62lcb-#a918cy-1r0m 1 u1 tssop16 mps mp8126df
EV8126DF-00A ? lnb power supply a nd control voltage regulator EV8126DF-00A rev. 1.0 www.monolithicpower.com 3 4/19/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. evb test results performance waveforms are tested on the evaluation board. v in = 12v, v out = 19v, l = 22h, t a = 25c, unless otherwise noted. v out 10v/div. v boost 20v/div. v en 5v/div. i out 500ma/div. v out 10v/div. v boost 20v/div. v en 5v/div. i out 500ma/div. i out 500ma/div. i out 200ma/div. v out 10v/div. v boost 10v/div. v sw 20v/div. v 13v/18v 5v/div. en startup i out =0.55a en shutdown i out =0.55a 13v to 18v switch 18v to 13v switch 22khz tone signal i out =0.1a steady state i out =0.55a v out 10v/div. v boost 10v/div. v sw 20v/div. v out 10v/div. v out (ac) 200mv/div. v boost 10v/div. v boost (ac) 20mv/div. v sw 20v/div. v extm 5v/div. v 13v/18v 5v/div. i out 500ma/div. v out (ac) 20mv/div. v boost (ac) (1) 100mv/div. v sw 20v/div. efficiency for 19v output 60 70 80 90 100 0.01 0.1 1 i out (a) efficiency for 14v output 60 70 80 90 100 0.01 0.1 1 i out( a) note : 1) before filter inductor l2 .
EV8126DF-00A ? lnb power supply a nd control voltage regulator EV8126DF-00A rev. 1.0 www.monolithicpower.com 4 4/19/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV8126DF-00A ? lnb power supply a nd control voltage regulator notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV8126DF-00A rev. 1.0 www.monolithicpower.com 5 4/19/2012 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2012 mps. all rights reserved. quick start guide 1. connect the positive terminal of the load to vo ut pins, and the negative terminal of the load to gnd pins. 2. preset the power supply output to 8~14v and turn off the power supply. 3. connect the positive terminal of the power supply output to the vin pin and the negative terminal of the power supply output to the gnd pin. 4. turn on the power supply. the board will automatically start up. 5. to use the enable function, apply a logic input to the en pin. set en higher than 2v to turn on the regulator or lower than 0.8v to turn it off. 6. to generate tone signal on output, apply a logic input to the extm pin. set extm higher than 2v to activate the function or lower than 0.8v to deactivate it. 7. the output voltage of this board is set to 19v. to adjust the output voltage, apply a logic input on 13v/18v 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. 13v/18v linedrop vout high high 19v high low 18v low high 14v low low 13v 8. the current limit can be adjusted by r1 and the soft start time be adjusted by c7. for further information, please refer to mp8126 datasheet.
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