ev8008-v-00a fully-integrated ieee 802.3af/at-compliant poe pd interface with peak current mode flyback controller evaluation board ev8008-v-00a rev. 1.0 www.monolithicpower.com 1 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. the future of analog ic technology tm tm description ev8008-v-00a evaluation board is designed to demonstrate the capability of mp8008`s function. the mp8008 is an integrated ieee 802.3af/at poe compliant powered device (pd) power supply converter. it includes pd interface and peak current mode flyback controller. the pd interface has all the functions of ieee 802.3af/at, and sets 120ma inrush current limit, 840ma operation current limit as well as 100v hot-swap mosfet. the flyback pwm controller can drive an external mosfet capable of handling more than 10a current. psm function improves the efficiency in light load condition. the mp8008 flyback also features protection including over load, short output and over voltage protection. the mp8008 can support a front-end solution for poe-pd application, it is available in qfn- 28 (4mmx5mm) package. electrical specifications parameter symbol value units input voltage v dd 37-57 v adapter voltage v adapter 12 v output voltage v out 12 v output current i out 2.1 a features ? compatible with 802.3af/at specifications ? 100v 0.48 ? pd integrated pass switch ? 120ma pd inrush current ? 840ma pd operation current limit ? auxiliary adaptor oring power supply ? pd power good and type-2 pse indicator ? 1a 12v flyback mosfet gate driver ? pulse skipping operation with light load ? programmable switching frequency (30khz-to-400khz) ? frequency synchronizing from 80khz-to- 400khz ? cycle-by-cycle current limit ? over load, short circuit, over voltage and thermal protection ? available in qfn-28 (4mmx5mm) package applications ? ieee 802.3af/at-compliant devices ? security camera ? video telephone ? wlan access points ? iot device all mps parts are lead-free, halogen free, and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc. ev8008-v-00a evaluation board (l x w x h) (11.8cm x 4cm x 1.5cm) board number mps ic number ev8008-v-00a MP8008GV
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 2 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm evaluation board schematic tct1 1 td4- 12 td4+ 11 tct4 10 tct3 7 td3- 9 td2- 6 td3+ 8 td1- 3 td2+ 5 td1+ 2 mx4- 13 mx4+ 14 mct4 15 mct3 18 mx3- 16 mx2- 19 mx3+ 17 mx1- 22 mx2+ 20 mx1+ 23 mct1 24 tct2 4 mct2 21 4 5 8 7 3 2 1 6 rx+ tx- tx+ rx- 4 5 8 7 3 2 1 6 rx+ tx- tx+ rx- 1 2 smaj58a 0.1uf det rtn gnd vin rt vdd ss
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 3 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm ev8008-v-00a bill of materials qty ref value description package manufacturer part number 1 c1a 47 f 47 f 100v cd284 e-cap. 10x12.5mm dip jianghai 47 f/100v 2 c1b, c1c 2.2 f ceramic cap.,100v, x7r 1210 murata grm32er72a225ka35l 2 c2a, c2b 22 f ceramic cap.,25v,x7r 1210 murata grm32er71e226ke15l 1 c2c 220 f 220 f 25v cd284 e- cap.,8x12.5mm dip jianghai 220uf/25v 2 c2d,c7 0.1 f ceramic cap.,50v,x7r 0603 murata grm188r71h104ka61d 1 c3 0.1uf ceramic cap.,100v, x7r 1206 murata grm319r72a104ka01d 1 c4 1 f ceramic cap.,25v,x7r 0603 murata grm188r71e105ka61d 1 c5 4.7 f ceramic cap.,16v x7r 0805 murata grm21br71c475ka73l 1 c6 0.22 f ceramic cap.,50v x7r 0603 murata grm188r71h224ka93d 1 c8 0.1 f ceramic cap.,100v x7r 0805 murata grm21br72a104kac4 l 0 c9,c13 ns 1 c10 470pf ceramic cap.,100v,x7r 0603 murata grm188r72a471ka01d 1 c11 220pf ceramic cap.,50v x7r 0603 murata grm188r71h221ka01d 1 c12 680pf ceramic cap.,50v x7r 0603 murata grm188r71h681ka01d 1 c14 1nf ceramic cap.,2000v x7r 1808 murata gr442qr73d102kw01l 1 r1 191k film res.,1% 0603 royal rc0603fr-07191kl 2 r2,r11 49.9k film res.,1% 0603 royal rc0603fr-0749k9l 1 r3 24.9k film res.,1% 0603 royal rc0603fr-0724k9l 1 r4 28.7 film res.,1% 0603 royal rc0603fr-0728r7l 1 r5 3k film res.,1% 0603 royal rc0603fr-073kl 2 r6,r18 1k film res.,1% 0603 royal rc0603fr-071kl 3 r7,r15, r16 100k film res.,1% 0603 royal rc0603fr-07100kl 1 r8 9.31k film res.,1% 0603 royal rc0603fr-079k31l 2 r9a, r9b 82m ? film res.,1% 1206 cyntec rl1632h-r080-fn 1 r10 4.99k film res.,1% 0603 royal rc0603fr-074k99l 1 r12 6.8k film res.,1% 0603 royal rc0603fr-076k8l 2 r13a, r13b 20k film res.,5% 1206 royal rc1206jr-0720kl 1 r14 7.5k film res.,1% 0603 royal rc0603fr-077k5l 0 r17, r19, r22 ns 1 r20 4.99r film res.,1% 0603 royal rc0603fr-074r99l 1 r21 10k film res.,1% 0603 royal rc0603fr-0710kl
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 4 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm ev8008-v-00a bill of materials (continued) qty ref value description package manufacturer part number 1 r23 20 film res.,5% 0805 royal rc0805jr-0720rl 1 r24 2k film res.,1% 0603 royal rc0603fr-072kl 1 r25 10 film res.,1% 0603 royal rc0603fr-0710rl 1 d1 sbr8u60p5 switching diode 60v 8a powerdi5 diodes inc sbr8u60p5 1 d2 9.1v diode zener 9.1v sod-123 diodes inc bzt52c9v1 1 d3 smaj58a tvs sma littelfuse smaj58a 1 d4 bat46w 100v, diode sod-123 diodes bat46w-7-f 1 d5 pds3100 3a,100v, schottky powerdi5 diodes pds3100-13 1 d6 bav21 switching diode 200v 200mw sod-123 diodes inc bav21w-7-f 1 d7 6.8v diode zener 6.8v sod-123 diodes inc bzt52c6v8 0 d8,d10 ns 2 d9,d11 1n4148 switching diode 75v 250mw sod-323 diodes inc 1n4148ws-7 8 d12,d1 3,d14,d 15,d16, d17,d1 8,d19 b1100 1a, 100v, schottky sma diodes inc b1100 1 t1 transformer power stage transformer smd wrth 7491194912 1 t2 749020010a lan-transformer we- lan smd wrth 749020010a 1 q1 si7430 n-ch mosfet 150v 26a powerpak so-8 vishay si7430dp 1 q2 tl431 reg vlt adj 2.5v sot-23 zetex inc tl431 1 q3 bss63lt1g pnp, 100v, 100ma sot-23 on semiconductor bss63lt1g 1 q4 mmbta06 npn, 80v, 500ma sot-23 fairchild mmbta06fstr-nd 2 j1,j2 rj45-8n4-b rj jack / signal line emi/rfi filters 6 trmn brd/cble grnd 8 pin block inductor rj45-tab tyco electronics rj45-8n4-b 1 l1 0.1uh ir=12a smd wurth 744 373 240 010 1 u1 mp8008 pd interface and dc-dc controller qfn-28 mps MP8008GV 1 u2 pc817 photo coupler smd sharp pc817
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 5 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm evb test results v dd ?v ss = 48v, v out = 12v, i out = 2.1a, t a = 25c, unless otherwise noted.
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 6 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm evb test results (continued) v dd ?v ss = 48v, v out = 12v, i out = 2.1a, t a = 25c, unless otherwise noted.
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 7 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm evb test results (continued) v dd ?v ss = 48v, v out = 12v, i out = 2.1a, t a = 25c, unless otherwise noted. i out 1a/div. v out /ac 500mv/div. i out 1a/div. v out /ac 100mv/div. i pri 5a/div. v sw 50v/div. out 5v/div. v dd 50v/div. v
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb ev8008-v-00a rev. 1.0 www.monolithicpower.com 8 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm printed circuit board layout figure 1 top silk layer figure 2: top layer figure 3: bottom layer
ev8008-v-00a?ieee 802.3af/at-compliant poe pd interface with flyback controller evb 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. ev8008-v-00a rev. 1.0 www.monolithicpower.com 9 6/7/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. tm quick start guide the output voltage of this board is set to 12v. the board layout accommodates most commonly used components. there are two methods to start ev8008-v-00a. method 1: 1. connect load to: a. positive (+): vout b. negative (?): vognd 2. plug the cable coming from the pse into the ethernet jack j1. the board will automatically startup. method 2: 1. preset power supply to 40v v in 57v. (it can work in 37v v in 57v after power up.) 2. turn power supply off. 3. connect power supply terminals to: a. positive (+): vdd b. negative (?): vss 4. connect load to: a. positive (+): vout b. negative (?): vognd 5. turn power supply on after making connections. 6. the mp8008 is enabled on the evaluation board once vin is applied. 7. to use adapter supply function, connect the 12v adapter`s positive terminal to vdd and negative terminal to apd-gnd, then turn on the adapter, the board will prior use adapter to supply itself. when use this adapter function and load current is heavy, some components` temperature should be high, it is limited by board size.
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