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v1.0 dec 2006 data sheet silver t e l e c o m 1. features ? ieee802.3af compliant ? small pack age size - 56mm (l) x 14mm (h) ? input voltage range 37v to 57v ? overload and short-circuit protection ? adjustable output - 3 product variants cover all voltages from 2.5v to 14v ? thermal cut off ? high efficiency dc/dc converter ? silver telecom ?design-in? assistance 2. description the AG8200 series of modules are designed to extract power from a c onventional twisted pair category 5 ethernet cable, conforming to the ieee 802.3af power-over-ethernet (poe) standard. the AG8200 signature and control circuit provides the poe compatibilit y signature and power classification required by the power sourcing equipment (pse) before applying up to 15w power to the port. the AG8200 is compat ible with class 0 to class 3 equipment. the high efficiency dc/dc conv erter operates ov er a wide input voltage range and provides a non-isolated regulated low ripple and low nois e output. the dc/dc conv erter also has built-in output overload, output short-circui t and over-temperature protecti on. AG8200 power-over-ethernet module pb pb ? silver tele com 20 05
v1 .0 d e c 20 06 AG8200 data sheet pow e r-o ver-eth ern e t module table of contents 1. features ........................................................................................................................... 1 2. description ....................................................................................................................... 1 table of contents ............................................................................................................. 2 table of figures ............................................................................................................... 2 3. AG8200 product selector ................................................................................................. 3 4. pin desc ription ................................................................................................................. 4 5. functional description ..................................................................................................... 5 5.1. inputs ........................................................................................................................ 5 5.2. pd signature ............................................................................................................. 5 5.3. isolation ..................................................................................................................... 5 5.4. power class ification .................................................................................................. 6 5.5. dc/dc converter ...................................................................................................... 6 5.6. grounding ................................................................................................................. 7 5.7. output adjustment ..................................................................................................... 7 5.8. typical connections .................................................................................................. 8 6. typical application ........................................................................................................... 9 7. typical recommendations ............................................................................................. 10 8. operating temperature range ...................................................................................... 10 9. over-voltage .................................................................................................................. 11 10. electrical characteristics .............................................................................................. 13 10.1. absolute maximum ratings* ................................................................................. 13 10.2. recommended oper ating conditions ................................................................... 13 10.3. dc electrical characteristics* ............................................................................... 14 11. package ....................................................................................................................... 15 11.1. AG8200-s .............................................................................................................. 15 11.2. AG8200-d .............................................................................................................. 15 table of figures figure 1: block diagram with external com ponents ............................................................ 3 figure 2: AG8200-s si l package format ............................................................................ 4 figure 3: typical syst em diagram ....................................................................................... 5 figure 4: class programming opti on ................................................................................... 6 figure 5: output adjustment ................................................................................................ 7 figure 6: typical connection diagram ................................................................................. 8 figure 7: typical application ................................................................................................ 9 figure 8: typical lay out ..................................................................................................... 10 figure 9: power plane heatsink for AG8200- s .................................................................. 11 figure 10: ag8203 operating profile ................................................................................. 12 figure 11: ag8205 operating profile ................................................................................. 12 figure 12: ag8212 operating profile ................................................................................. 13 ? silver telecom 2005 2
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 3. AG8200 product select or part number nominal output voltage maximum output power * (watts ) m a r k i n g p a c k a g e a g 8 2 1 2 - s 1 2 . 0 v 1 2 1 2 s i l a g 8 2 0 5 - s 5 . 0 v 9 5 s i l a g 8 2 0 3 - s 3 . 3 v 6 . 6 3 s i l a g 8 2 1 2 - d 1 2 . 0 v 1 2 1 2 d i l a g 8 2 0 5 - d 5 . 0 v 9 5 d i l a g 8 2 0 3 - d 3 . 3 v 6 . 6 3 d i l *at 25c w i th v in = 48v ? all versions of t he AG8200 a r e r o hs compliant. table 1: ordering information figure 1: block diagram w i th external components ? silver telecom 2005 3
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 4. pin description pin # name description 1 v i n + direct input + . this pin connects to the positive (+) output of the input bridge rectifiers (int ernally c onnected to pin 3). 2 v i n - direct input - . this pin connects to the negative (-) output of the input bridge rectifiers (inter nally c onnected to pins 4 and 5). 3 v i n + direct input + . internally conn ec ted to pin 1. 4 5 vin- direct input - . internally connec ted to pin 2. 6 c p class pro g ramming. connectin g an extern al resistor to vin- will change the current class of the modul e. with no resistor fitted the AG8200 will default to class 0. 7 - v d c negative dc output. this pin provides the negative regulated output from the dc/dc converter. 8 + v d c positive dc output. this pin pr ovides the positive regulated output from the dc/dc converter. 9 a d j output ad just. the output voltage is set by connecting an external resistor from this pin to the +vdc pin. see the output adjustment section for more information. 1 0 i c internal c onnection. do not connect to this pin. figure 2: AG8200-s si l package format ? silver telecom 2005 4
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 5. functional description 5.1. inputs the AG8200 has a single input t hat can be c onnected t o two external brid ge r e ctifiers (see figure 1). this allows the ag820 0 to be compatible with equi pment that use the different power options, see figure 3. it i s important that the pse does n o t apply power to both bridge rectifiers at the same time (ref er to ieee802.3af fo r more information). figure 3: typical system diagram 5.2. p d signature when the ag820 0 is connected to the cat 5e cabl e, it will autom atically pre s ent a powered device (pd) signature to t he power so urcing equipment ( pse) or midspan equipm ent, when requested. the equipment will then recognise that a powe red dev ice is connected t o that line and supply power. 5.3. isolation the ag82 0 0 series conforms to the ieee 8 02. 3af standard exce p t for the 1500v iso l ation, which must be done externally. this is usuall y achieved without additional components, by using a plastic insulating enclosure. cont act silver telecom for further details. ? silver telecom 2005 5
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 5.4. p o wer classification this is optional from the pse and is used f o r power m anagement . the AG8200 allows the current class to be externally programmed by connecting a resistor between the cp an d vin- pins, see figure 4. if no resist or is fitted the AG8200 will defau lt to class 0, a full list of programming resistor values are shown in t able 2. clas s programming resistance (ohms) min power (w) max power (w) 0 do not fit 0.44 12.95 1 6 9 8 0 . 4 4 3 . 8 4 2 3 4 3 3 . 8 4 6 . 4 9 3 2 4 9 6 . 4 9 1 2 . 9 5 4 t b d r e s e r v e d r e s e r v e d table 2: class progr amming AG8200 cp vin- cla ss prog ra mm ing op t i on rc figure 4: class pro g ramming option 5.5. dc/dc converter the AG8200?s dc/dc converter provides a non- isolated regulated low ripple and low nois e output, that has built -in overload and short-circ uit output protection, as well a built-in thermal cut-off - see table 1: ordering in formation for voltage and power ratings. because the AG8200 series ar e non-isolated the +vdc output is (internally) connected to the vin+ input. ? silver telecom 2005 6
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 5.6. groundi ng if the AG8200 is supplied from a grounded s ource (e.g. a standard multi-c hannel pse) it is important that the ?vdc output is not connected to ground. connecting both input and output to ground will result in a short circuit that will prevent t he AG8200 from operating correctly. 5.7. output a d justmen t the AG8200 output voltage is s e t ex ternally by the ra resistor . if the ra resistor is open circuit (o/c) then the output is set to its ma ximum voltage. if the ra res i stor is a s h ort circuit (s/c) then the output will be set to it s minimum voltage. table 3 be lo w shows the output voltage range of each of t he product variants and the valu es of ra r e quired to set the nominal output voltage. figure 5: output adjustment setting the output voltage, connect ra betw een a d j and +vdc a g 8 2 0 3 a g 8 2 0 5 a g 8 2 1 2 r a o u t p u t r a o u t p u t r a o u t p u t o / c 4 . 5 v o / c 7 . 5 v o / c 1 4 . 0 v 5 k 6 3 . 3 v 3 k 5 v 6 8 k 1 2 . 0 v s / c 2 . 5 v s / c 4 . 5 v s / c 7 . 5 v table 3: output adjustme nt resistor (ra) value *note: the r e sults in table 3 are u nder minimum load conditions ? silver telecom 2005 7
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 5.8. typical connections the AG8200 only requires external bridge r e ct ifiers on its input, the ra resistor and a low cost capacitor on its output (a minimum of 470f is recommended) as shown in figure 6. the value of c1 will be rela ted to the maxim u m load st ep c hange that the output needs t o drive. for example, in an applic ation were the output needs to c ope with a 1.8 amp load step change, a minimum of 470f should be used. this can be a standard low cos t electrolytic and does not need to be a low esr type. figure 6 s hows a 16v capac itor that would cover all product variants up to and includ ing the ag8212, see table 1: ordering information. the class programming input is optional and provides great flexibility to the AG8200. further information on using this input can be found in sections 5.4. power classificatio n . AG8200 rx tx 4 5 1 2 3 6 7 8 vin+ vin- cp +vdc -vdc adj o u t put rj- 4 5 c1 470f 16 v + ra rc * * optiona l cla s s program ming re si stor figure 6: typical con n ection diagram ? silver telecom 2005 8
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 6. t y pical application the AG8200 can be used in numerous applications . in the example show n in figure 7, the data outputs from the switch are connected to the inputs of a midspan. the midspan will then add power (to the data) on each output that supports po wer over ethernet (poe). in this example port 1 is c onnected to an et hernet camera and port 2 is c onnected t o a wireless ac cess point, both of these devices have a built-in AG8200. when the midspan is switched on (or when the device is connect ed), the midspan will check eac h output for a poe signat ure. on ports 1 and 2 the ag8 200 will id entify themselv es as poe en abled devices and the midspan will supply both data and power to these peripherals. the other ports (shown in this example) wil l not have a poe signature and the midspan will only pass the data through to these periph e ra ls. the midspan will continuo usly monitor each output to see if a poe enabled device has been added or removed. figure 7: typical app lication ? silver telecom 2005 9
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 7. t y pical recommendations figure 8: typical layout gives an example of the tracki ng needed fo r the AG8200. r1, r2 and r3 are optional c o mponents , but c1 needs to be positioned close to the output pins of the AG8200 as poss i ble to minimise the c u rr ent loop. the thermal performance of the AG8200 can be improved by incr easing the surface area of t he output tracks (+vdc and - vdc) this is not applic able if the AG8200 is in a socket. figure 8: ty pical layout 8. operating t e mperature range because th e ag820 0 is a power component , it will g e n e rate heat, so it is imp o rtant that this be taken into consideration at the design stage. the heart of the AG8200 is a dc/dc converter, which like any other power supply will generate heat. the amount of h eat generated by the module wi ll depend o n the load it is required to drive and the input vo ltage supp li ed by the pse. the information shown with in this section of datasheet is referenced to a nominal 48vdc input voltage supplied by the pse. the AG8200 has a maximum ambient operating tem perature of 70 o c s e e figure 10, figure 11 & figure 12. thes e results are in still air without any he atsinking, the performance of the AG8200 c a n be improv ed by fo rcing the a i rflow over the part or by using a heatsink (see the AG8200 application note on heatsinking for more information). the AG8200 has built-in thermal protection, to prevent the module from being damaged if operated beyond its power / temper ature specification. if the thermal protection circuit is activated then the dc/dc conv erter will s hut down and will re main off until the inp u t voltage is removed an d reapplie d . in shut down mode the ag820 0 input current will be le ss than 5ma, which is below th e pse output hold current. the pse will as sume that the AG8200 has been dis c onnected and will sw itch its output off and will return to testing f o r a correct signature. the thermal protection ci rcuit will continue to disable the dc/dc converter until the AG8200 tem perature has cooled suffic i ently. ? silver telecom 2005 10
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module because each applic ation is diffe rent it is impossible to give fix e d and absolute thermal recommendations. however it is important that any enclos u re used has sufficient ventilation for the AG8200 and a direct airflow if possible. one simple method for drawing some of t he heat away from the AG8200 is shown in figure 9. power planes connected to the +v dc and gnd pins of t he AG8200 can be used to draw heat away from the dc/dc converter via the output pins. these power planes must be on the outer l a ye rs of the pcb and the AG8200 must not be fitted into a socket (this example is suitable for both ?s and ?d variants). figure 9: pow e r plane heatsink for AG8200-s figure 10, figure 11 and figu re 12 show the max i mum ambient temperature under different load conditions. thes e figure have been recorded in a s ealed enclosure (in s t ill air) using a heater element to elevate the am bient temperature (w ithin the enclosure). 9. over-volt a ge the AG8200 may be damaged by voltage inputs great er than 80v. if protection from electrostatic dischar ge (esd) or other hi gh voltage transients is r equired it is recommended that an over-voltage clamping dev ic e is fitted between the vin+ and the vin- pins. typically an smaj58 will be sufficient. ? silver telecom 2005 11
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module output p o wer ( w ) figure 10: ag8203 o p erating profile output p o wer ( w ) figure 11: ag8205 o p erating profile ? silver telecom 2005 12
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module outpu t power (w) figure 12: ag8212 o p erating profile 10. electrical characteristics 10.1. absolute maximu m rating s* p a r a m e t e r s y m b o l m i n m a x u n i t s 1 dc supply voltage v cc - 0 . 3 6 0 v 2 dc supply voltage surge for 1ms v surg e - 0 . 6 8 0 v 3 s t o r a g e t e m p e r a t u r e t s - 4 0 + 1 0 0 o c *exceeding the a bove ratings ma y cause permane nt damage to t h e product. fu nctional operation u nder these condit i ons is not imp lied. maximum ratings assume free airfl o w . 10.2. recomm ended op erating conditions p a r a m e t e r s y m b o l m i n ty p m a x u n i t s 1 input supply voltage v in 3 6 4 8 5 7 v 2 under volt age lockout v lock 3 0 3 6 v 3 o p e r a t i n g t e m p e r a t u r e t op - 1 0 2 5 70 ? t a / o c ?see section 8. oper ating temp erature range ? silver telecom 2005 13
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 10.3. dc electrical characteristics* dc characteristic sy m min t y p* max units test comments 1 output voltage (se e section 5.7. output adjustme nt ) v ou t 2.5 4.5 7.5 3.3 5.0 12 4.5 7.5 14 v v v ag8203 ag8205 ag8212 2 output current (v in = 48v) i out 2.0 1.8 1.0 a a a ag8203 ag8205 ag8212 3 line regulation v in = 36v to 57v @ max load** v line 1.0 0.5 0.25 % ag8203 ag8205 ag8212 4 load regulation min to max load (v in = 48v)** v load 5.0 2.5 1.5 % ag8203 ag8205 ag8212 5 output ripple and noise max load ? v rn 40 40 30 mvp-p mvp-p mvp-p ag8203 ag8205 ag8212 6 m i n i m u m l o a d r load 2 5 0 m a for specified regulation ? 7 s h o r t - c i r c u i t d u r a t i o n t sc s e c continu o us @ 50 o c, v in =48v 8 efficiency @ 100% load, v in =48v e f f 72 79 87 % % % ag8203 ag8205 ag8212 *t y p ical figures a r e at 25 c w i th a nominal 48v suppl y and a r e for design aid only. not gu arante ed **after 5 minutes ?the outp u t rippl e and noise can be reduced w i th an exte rnal filter, see application note. ?can be used w i th no load at re d u ced voltage reg u lation. ? silver telecom 2005 14
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module 11. packag e 11.1. AG8200-s 56.0 10.0 (max) 1 . 8 0.25 30 .48 0.25 (recommended pcb hole diameter = 1.1 0 . 05) dime nsions (in mm) are nominal unless ot herwise st ated 2.54 0.05 0.6 0.05 0.6 0.05 1 3.0 7.0 ( m ax) AG8200-s 11.2. AG8200-d 56.0 11.0 (max) 1 . 8 0.25 30 .48 0.25 (recommended pcb hole diameter = 1.1 0 . 05) dime nsions (in mm) are nominal unless ot herwise st ated 2.54 0.05 1 4.0 (max) AG8200-d 0.6 0.05 information pu blished in this datasheet is believed to be correc t an d accurate. silver telecom assu mes no liability f o r errors wh i c h m a y occur or for liability oth e r w ise arising out of use of this information or infringement o f patents w h ich ma y occur as a result of such u s e. no license is gra n ted b y this document under pat ents ow ne d b y silv er telecom or licensed from thir d parties b y silver telecom. the products, their sp ecification and in formation appe ar ing in this docum ent are subject to change b y silver telecom w i thout notice . ? silver telecom 2005 15
v1 .0 d e c 20 06 data sheet AG8200 pow e r-o ver-eth ern e t module ? silver telecom 2005 16

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