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general description the max5952a evaluation kit (ev kit) is a fully assembledand tested surface-mount circuit board featuring an ethernet four-port power-sourcing equipment (pse) cir- cuit for -48v supply rail systems. the ieee 802.3af and pre-802.3at-compliant max5952a pse controller in a 36- pin ssop package and four n-channel power mosfets are used to form the main power-sourcing equipment cir- cuit on the ev kit. the max5952a is used in power-over- ethernet (poe) applications requiring dc power over four ethernet network ports. the ev kit provides optical isola- tion for the i 2 c-compliant 3-wire interface. the isolated interface can connect to a pc? usb port through acmaxqusb interface board. the ev kit can easily be reconfigured for interfacing to a user? stand-alone micro- controller for isolated or nonisolated operation. in stand- alone operation, the user must supply a separate 3.3v power supply capable of supplying 100ma for the ev kit? +3.3v optically isolated 3-wire interface. the max5952a ev kit requires a -32v to -60v power supply (-48v supply rail) capable of supplying 4a or more to the ev kit for the power device (pd) through the four 10/100base-tx ethernet network ports. the ev kit demonstrates pd discovery, classification, current-limit control, and other functions of an ieee 802.3af and pre- 802.3at-compliant pse. the max5952a controls the -48v dc power to each of the four ethernet network ports by controlling the port? power mosfet and sensing current through the respective port? current-sense resistor. the current is fed to a 10/100base-tx voice-over-ip magnetic mod- ule at each ethernet output port. the max5952a ev kit provides a separate, independent power channel for each of the four ethernet output ports. the ev kit demonstrates the full functionality of the max5952a for each power channel such as config- urable operational modes, high-power modes (pro- grammable for up to 45w per port), port current information through i 2 c interface, pd detection, pd classification, overcurrent protection, current foldback,under/overvoltage protection and ac-disconnect moni- toring. all these features are configurable on the ev kit and additional test points for voltage probing and cur- rent measurements have been provided. the ev kit software is windows 98se/2000/xp com- patible and provides a user-friendly interface to demon- strate the features of the max5952a while also providing access to each register at the bit level. the program is menu driven and offers a graphic interface with control buttons. the program also includes a macro engine to allow automated evaluation and test- ing of the max5952a at the system level. the pro- gram? macro output files can be automatically saved. evaluate: max5952a max5952a evaluation kit/evaluation system ________________________________________________________________ maxim integrated products 1 ordering information 19-4026; rev 0; 2/08 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. note: the max5952a ev kit software is provided with the max5952aevkit. however, the cmaxqusb interface board is required to interface the ev kit to the computer when using the software. features ? ieee 802.3af and pre-802.3at-compliant power-sourcing equipment (pse) circuit ? high-power mode programmable up to 45wper port ? port current readout through i 2 c interface ? input voltages -32v to -60v providing 4a (-48v power circuit, 750ma/port) ? ethernet network ports four rj-45 10/100base-tx ethernet network input ports four rj-45 10/100base-tx ethernet network output power-over-ethernet ports ? demonstrates four separate independent power switch controllers ? provides pd detection and classification ? configurable dc/ac load removal detection anddisconnect monitoring ? configurable current sensing ? convenient voltage and current test points ? four output-port led status indicators ? optically isolated 3-wire i 2 c-compliant pc interface ? reconfigurable for stand-alone operation or withan external microcontroller (requires +3.3v 100ma supply) ? windows 98se/2000/xp-compatible software ? fully assembled and tested windows is a registered trademark of microsoft corp. part type max5952aevkit ev kit MAX5952AEVCMAXQU ev system order the MAX5952AEVCMAXQU for a complete pc-based evaluation of the max5952a. order the max5952aevkit if you already have a cmaxqusb interface board or do not require pc-based evaluation of the max5952a. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 2 _______________________________________________________________________________________ component lists part qty description max5952aevkit 1 max5952a evaluation kit cmaxqusb 1 i 2 c interface board max5952a ev kit max5952a ev system designation qty description c1 1 220? ?0%, 100v electrolyticcapacitor (18mm x 16.5mm) panasonic eevfk2a221m c2, c3 2 1.0? ?0%, 6.3v x5r ceramiccapacitors (0603) avx 06036d105ka or taiyo yuden jmk107bj105ka c4 1 220? ?0%, 6.3v electrolyticcapacitor (8.3mm x 9mm) sanyo 6svpa220maa c5, c8, c13, c15, c41 5 0.47? ?0%, 100v x7r ceramiccapacitors (1210) vishay vj1210y474kxbab c6 1 1? ?0%, 100v x7r ceramiccapacitor (1210) avx 12101c105kat9a c7, c9, c16, c23, c30, c31, c33?36, c38, c39, c44 13 0.1? ?0%, 16v x7r ceramiccapacitors (0603) avx 0603yc104ka c10, c11, c12, c17 0 not installed, ceramic capacitors(0805) c14, c42 2 4.7? ?0%, 6.3v x5r ceramiccapacitors (0805) avx 08056d475ka or taiyo yuden jmk212bj475kg c18, c26?29, c47, c49, c51,c55, c57, c59, c61, c63 13 0.1? ?0%, 100v x7r ceramiccapacitors (0805) avx 08051c104ka c19?22, c24, c25 6 1000pf ?0%, 250v ac x7r ulceramic capacitors (2010) murata ga352qr7gf102k designation qty description c32 1 3.3? ?0%, 10v x5r ceramiccapacitor (0805) avx 0805zd335ka c40 1 0.015? ?0%, 50v x7r ceramiccapacitor (0603) murata grm188r71h153k c43 1 0.022? ?0%, 50v x7r ceramiccapacitor (0603) murata grm188r71h223k c45 1 2.2? ?0%, 16v x7r ceramiccapacitor (1206) murata grm31mr71c225k c46 1 0.0047? ?0%, 50v x7r ceramiccapacitor (0603) murata grm188r71h472k c48 1 0.22? ?0%, 16v x7r ceramiccapacitor (0603) murata grm188r71c224k d1?4 4 1a, 200v rectifier diodes (sma)central semiconductor cmr1-02m+ d5?8 4 250ma, 75v high-speed switchingdiodes (sot23) central semiconductor cmpd4448+ d9?12 4 56.7v, 600w transient voltagesuppressors (smb) vishay smbj51a d13?16 4 green surface-mount leds (1206) d17?20 4 5.6v, 500mw ?% low-noise zener diodes (sod-123) central semiconductor cmhz4626+ d21 1 1a, 100v high-voltage schottky diode (sma) diodes incorporated b1100 d22 1 2a, 100v high-voltage schottky diode (smb) diodes incorporated b2100-13-f j1 1 2 x 10 right-angle female receptacle j2 1 6-pin header downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system _______________________________________________________________________________________ 3 max5952a ev kit (continued) designation qty description j3 1 2 x 4 fastjack through-hole rj-45 jack (8p-8c ) with10/100base-tx voice-over-ip magnetics (700ma dc) halo electronics hfj24-max2e specific application recommendations midspan: hfj14-rp07-s2l11rl or hfj24-rp07e endspan: hfj14-rp32-s2l11rl or hfj24-rp32e ju1?u8 8 3-pin headers ju9, ju10 0 not installed, 2 x 5-pin headers ju11?u14 0 not installed, 2 x 3-pin headers ju15?u18, ju27?u30 8 2-pin headers ju19?u26 0 not installed, 2-pin headers l1 1 68?, 0.9a inductorcoilcraft do3308p-683ml n1?4 4 100v, 3.7a n-channel mosfets (powerpak 8-pin so) vishay si7454dp-e3 n5?8 4 100v, 0.17a n-channel mosfets (sot23) fairchild bss123 n9 1 100v, 1.5a n-channel mosfet(sot23) vishay si2328ds-t1-e3 q1, q2, q3 3 80v, 500ma pnp transistors (sot23) central semiconductor cmpta56+ r1?8 8 0.250 ?%, 1w resistors (1206) irc lrc-lr1206lf-01-r250-f orpanasonic erj8bqfr25v r9, r29, r30, r53, r54, r77, r95, r96 83k ?% resistors (0603) r10?20, r22, r26, r34, r35,r62, r63, r66, r67 19 1k ?% resistors (0603) designation qty description r21, r28, r31, r65, r79, r91 6 100 ?% resistors (0603) r23 1 51 ?% resistor (0805) r24, r27, r32, r64 410 ?% resistors (0603) r25, r33, r36, r57 0 not installed, resistors (0603)2k ?% recommended r37, r39, r41,r43, r45, r47, r49, r51 875 ?% resistors (0805) r38, r40 2 22.1k ?% resistors (0805) r42 1 60.4k ?% resistor (0805) r44 1 1.02k ?% resistor (0805) r46 1 1k ?% resistor (0805) r48, r50 2 2 ?% resistors (1206) r52 1 30 ?% resistor (0805) r55 1 0.56 ?% resistor (0603) r56, r71, r94, r97 4 180 ?% resistors (0603) r58?61 4 5.1k ?% resistors (0603) r68 1 0 ?% resistor (0805) r69, r70 2 40.2k ?% resistors (0603) r72 1 0 ?% resistor (1206) r73?76 4 301k ?% resistors (0603) r78, r80 2 10k ?% resistors (0603) r81 1 32.4k ?% resistor (0603) r82, r86 2 20k ?% resistors (0603) r83 1 46.4k ?% resistor (0603) r84 1 226k ?% resistor (0603) r85 1 200k ?% resistor (0603) r87?90 4 2.2m ?% resistors (0805) r92, r93 2 1 ?% resistors (1206) r98?101 0 not installed, resistors (0603)1k ?% recommended s1?5 5 micro miniature pushbutton switches u1-socket 1 36 ic socket u1 1 q uad p s e contr ol l er ( 36 s s o p ) maxim max5952auax+ fastjack is a registered trademark of psp. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 4 _______________________________________________________________________________________ component suppliers max5952a ev kit (continued) designation qty description u2 1 spdt analog switch (6 sc70)maxim max4599ext+ u3 1 dual-output op amp (8 sot23)maxim lmx358aka+ u4 1 dual universal switched-capacitorfilter (16 qsop) maxim max7491eee+ u5 1 3v econoscillator/divider(8 ?op) maxim ds1077lu-40+ u6 1 2.048v voltage reference(3 sot23) maxim max6106eur+ u7, u8 2 high-speed, 15mbps logic gateoptocouplers (8 so) cel/nec ps9821-2-a u9 1 tinylogic uhs dual buffer with schmitt trigger inputs (6 sc70)fairchild nc7wz17p6x supplier phone website avx corp. 843-946-0238 www.avxcorp.com cel/nec; california eastern laboratories 800-997-5227 www.cel.com central semiconductor corp. 631-435-1110 www.centralsemi.com coilcraft, inc. 847-639-6400 www.coilcraft.com diodes inc. 805-446-4800 www.diodes.com fairchild semiconductor 888-522-5372 www.fairchildsemi.com halo electronics, inc. 650-903-3800 www.haloelectronics.com irc, inc. 361-992-7900 www.irctt.com murata electronics north america, inc. 770-436-1300 www.murata.com panasonic 714-373-7366 www.panasonic.com sanyo electronic co., ltd. 619-661-6835 www.sanyodevice.com taiyo yuden 800-348-2496 www.t-yuden.com vishay www.vishay.com designation qty description u10 1 current-mode pwm controller(8 so) maxim max5020esa+ osc_input 1 bnc connector gnd, gnd,gnd, gnd, dgnd, dgnd,dgnd, dgnd, dgnd 9 pc test points, miniature, red vdig, vdig, vdig, vdig 4 pc test points, miniature, yellow vee 1 pc test point, miniature, black vee, gnd 2 uninsulated banana jacks 12 shunts ( ju1?u8, ju15?u18) ? software disk (cd-rom)max5952a evaluation kit 1 pcb: max5952a evaluation kit+ econoscillator is a trademark of dallas semiconductor corp. tinylogic is a registered trademark of fairchild semiconductor, corp. note: indicate that you are using the max5952a/max5952c when contacting these component suppliers. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system _______________________________________________________________________________________ 5 quick start the max5952a ev kit is fully assembled and tested.follow these steps to verify board operation. do not turn on the power supplies until all connections are completed. required equipment one -32v to -60v, 4a capable dc power supply maxim max5952a ev kit and cmaxqusb interface board windows 98se/2000/xp computer with a spare usb port usb i/o extension cable, straight-through male-to- female cable one voltmeter for confirming output voltages note: the gnd banana jack is more positive than the vee banana jack.use an isolated oscilloscope for probing with respect to vee. note: in the following section(s), software-related items are identified by bolding. text in bold refers to items directly from the ev kit software. text in bold and under - line refers to items from the windows operating system. hardware connections 1) visit the maxim integrated products website (www.maxim-ic.com/evkitsoftware) to download themost recent version of the ev kit software 5952arxx.zip. save the ev kit software to a tempo- rary folder and uncompress the .zip file. 2) install the ev kit software on your computer by run- ning the install.exe program inside the temporaryfolder. the program files are copied and icons are created in the windows start | programs menu. 3) connect the cmaxqusb interface board to the max5952a ev kit? interface connector j1. 4) verify that a shunt is installed on pins 1 and 2 of jumpers ju1 (a0, high), ju2 (a1, high), ju3 (a2,high), and ju4 (a3, high) to set the max5952a i 2 c- compliant slave address to 0x5e hexadecimal. 5) verify that a shunt is installed on pins 2 and 3 of jumper ju5 (signal mode). 6) verify that a shunt is installed on pins 1 and 2 of jumpers ju6 (automatic mode) and ju8 (on-board100hz oscillator running). 7) verify that a shunt is installed on pins 2 and 3 of jumper ju7 (osc_in, 100hz oscillator). 8) verify that no shunt is installed on jumpers ju15, ju16, ju17, and ju18 (ac disconnect). 9) connect the -32v to -60v dc power supply to the metal vee banana jack and the supply ground tothe metal gnd banana jack. do not turn on the power supply until all connections are completed. 10) connect a pd to the desired ethernet output port? rj-45 connector (upper row) on the max5952a evkit? 2 x 4 fastjack (j3) as listed below: port1_out at upper row rj-45 port2_out at upper row rj-45 port3_out at upper row rj-45 port4_out at upper row rj-45 this step is optional if network connectivity and/or a pdis not required. 11) connect the max5952a ev kit? network input lan port (lower row) to the corresponding pd lan con-nection as listed below: port1_in at lower row rj-45 port2_in at lower row rj-45 port3_in at lower row rj-45 port4_in at lower row rj-45 this step is optional if network connectivity is not required. 12) install the max5952a evaluation software on your computer by running the install.exe programon the cd-rom. the program files are copied and icons are created for them in the windows start menu. restart the computer when prompted. forwindows 2000 and xp, you may need administra- tor privileges. 13) turn on the power supply. file description install.exe installs the ev kit files on yourcomputer max5952a.exe application program helpfile.htm max5952a ev kit help file ftd2xx.inf usb device driver file power_on.smb bitmap macro routine te s t#1_m an u al_m od e .s m b bitmap macro routine te st#2_au to_m ode _d c.s m b bitmap macro routine te s t#3_au to_m od e _ac .s m b bitmap macro routine te st#4_s emiauto_m ode .sm b bitmap macro routine trou bles h ootin g_u s b.p d f u s b d r i ver i nstal l ati on hel p fi l e uninst.ini uninstalls the ev kit software max5952a ev kit files downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 6 _______________________________________________________________________________________ 14) connect the usb cable from the pc to the cmaxqusb interface board. a building driver database window should pop up in addition to a new hardware found message if this is the first time the ev kit board is connected to the pc. if you do not seea window that is similar to the one described above after 30s, try removing the usb cable from the cmax- qusb and reconnect it. administrator privileges are required to install the usb device driver on windows 2000 and xp. refer to the document trou- bleshooting_usb.pdf included with the software if you have any problems during this step. 15) follow the directions of the add new hardware wizard to install the usb device driver. choose the search for the best driver for your device option. specify the location of the device driver to bec:\program files\max5952a (default installation directory) using the browse button. 16) start the max5952a ev kit software by opening its icon in the start | programs menu. 17) observe as the program automatically detects the cmaxqusb interface board, starts the main pro-gram, and then automatically detects the i 2 c-com- pliant address configured for the max5952a. 18) select the bitmap controls tab at the top. 19) load and run the power_on.smb macro program from the file | open | run macro menu. the script automatically runs after selecting open . 20) all four network port green status leds should be lit. 21) four other example macros allow quick testing of the manual mode, auto mode, semiauto mode, andwith dc and/or ac load-disconnect detection. these macros are: test#1_manual_mode.smb test#2_auto_mode_dc.smb test#3_auto_mode_ac.smb test#4_semiauto_mode.smb read the embedded comments in each macro fordetailed descriptions using a plain text editor. 22) pressing pushbutton switches s1 through s4 shuts down the port1_out through port4_outrespective dc power. 23) test points vee (u1 vee pin) and gnd test points are provided throughout the printed-circuit board(pcb) to observe desired signals with an oscillo- scope or voltage meter. use an isolated oscillo- scope for probing with respect to vee. 24) header j2 is provided to monitor the shdn pin sig- nals. these signals are not isolated and are refer-enced to dgnd. dgnd and gnd are shorted by a pcb trace between the pads of resistor r72. 25) pressing the reset pushbutton turns off power to all ports and returns the max5952a ic to thepower-up condition. note: the gnd banana jack is more positive than the vee banana jack. use an isolated oscilloscope forprobing with respect to vee. note: an uninstall program is included with the soft- ware. click on the uninstall icon to remove the evkit software from the hard drive. detailed description of hardware the max5952a ev kit features a 10/100base-tx ethernetfour-port pse controller circuit for -48v supply rail systems. the ev kit? pse circuit uses the ieee 802.3af and pre- 802.3at-compliant max5952a network power controller, four n-channel power mosfets in 8-pin so surface- mount packages, eight surface-mount current-sensing resistors, and four 10/100base-tx voice-over-ip magnetic modules (integrated in j3) to form the basic portion of a pse circuit. the max5952a ev kit has been designed as an ieee 802.3af and pre-802.3at-compliant pse anddemonstrates all the required functions such as pd dis- covery, classification, current-limit control of a connected pd at each ethernet output port, and dc/ac disconnect detection. the ev kit also has a separate on-board 100hz sine-wave oscillator circuit for the ac-disconnect detection features. an ibm-compatible pc can be used to communicate with the slave max5952a over an i 2 c- compliant 3-wire interface, optically coupled logic, and a2-wire to usb-port cmaxqusb interface board. the max5952a ev kit pse circuit requires a -32v to -60v power supply (-48v supply rail) capable of supplying 4a to the ev kit? gnd and vee steel banana jacks or pcb pads. a separate +3.3v power supply capable of supply- ing 100ma is also required for the max5952a optically iso- lated i 2 c-compliant 3-wire interface if a cmaxqusb interface board is not used. note that dgnd and gnd areshorted by a pcb trace between the pads of resistor r72. the max5952a controls the -48v dc power to each of the four 10/100base-tx ethernet output ports by regulat- ing the respective port? n-channel power mosfet and sensing current through the respective port? current- sense resistors. the current is fed to the 10/100base-tx voice-over-ip magnetic module connected to the respec- tive ethernet output port? rj-45 jack. an ieee 802.3af and pre-802.3at-compliant pd connects to the respective ethernet output port (j3 upper ports) on the ev kit. the downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system _______________________________________________________________________________________ 7 pd can be located up to 350ft from the ev kit when con-nected with twisted 4-pair ethernet cable. the max5952a ev kit provides separate and independent power control for each of the four ethernet output ports. the 10/100base-tx voice-over-ip magnetic module is decoupled to the ev kit? chassis ground by system chassis capacitors c19, c20, c21, c22, c24, and c25. the ev kit? isolated chassis ground (chassis_gnd) pcb pad connects to the network system ground. the max5952a ev kit features configurable operational modes, pd detection, pd classification, overcurrent pro- tection, current foldback, under/overvoltage protection, dc and ac disconnect monitoring, high-power mode, and port current information through the i 2 c interface. the overcurrent protection can be programmed through soft-ware and/or changing current-sense resistors (r1 and r5), (r2 and r6), (r3 and r7), or (r4 and r8) for the desired output port. each of the four modes of operation (auto, semi, manual, shutdown) can be evaluated after configuring jumper ju6 and configuring the appropriate max5952a register (see table 3) or using the software? high-level configuration window. pd detection diodes d1?4 can be bypassed to reduce power dissipationwhen ac-disconnect monitoring is not required, using jumpers ju15?u18. each port? ac detection circuit resistor-capacitor-diode (rcd) network can be reconfig- ured with a jumper also. see tables 4, 8, and 9 for various ac detection disconnect and oscillator configurations. each port features a 600w bidirectional overvoltage tran- sient suppressor, diodes (d9?12), and decoupling capacitors (c26?29) for transient protection at the port. test points and jumpers have been provided for voltage probing and current measurements of each channel? power circuit. additionally, a 6-pin, 0.100in center header is also provided for monitoring the shdn1 , shdn2 , shdn3 , shdn4 , and reset signals routed to the max5952a pins from the respective switch (s1?5). when using the headersignals, caution should be exercised since dgnd and gnd are shorted by resistor r72 pcb shorting trace. additionally, since the gnd is more positive than vee, use an isolated oscilloscope when probing signals, with respect to vee. green leds relative to each port? rj-45 output jack, indicate when the respective port? power is turned on. a 100hz oscillator circuit, which meets the ieee 802.3af and pre-802.3at pse power interface (pi) parameters for ac-disconnect detection, is provided by the max5952a ev kit. five ics make up the 100hz oscillator circuit that con- sists of u5, a programmable 40mhz econoscillator/divider square-wave oscillator, and the max7491 dual universal switched-capacitor filter, u4. voltage reference source u6 (max6106) provides 2.048v for the circuit and level shifts the sine wave? output. the max4599, an spdt analog switch, and ic u3, the lmx358 dual-output op amps, pro- vide support functions for the oscillator circuit. an externalsine-wave oscillator meeting the ieee 802.3af and pre- 802.3at pse pi parameters can be connected to the ev kit? bnc connector (osc_input) after reconfiguring jumper ju7. the ev kit? 100hz oscillator circuit can be shut down by using jumper ju8 if an external oscillator isused or ac-disconnect detection is not required. the ev kit provides optical isolation for the i 2 c-compliant 3-wire interface required by the max5952a, operating asa slave device by optical couplers u7 and u8. the opti- cally isolated interface connects to a computer? usb port through a cmaxqusb interface board. the ev kit? i 2 c-compliant 2-wire or 3-wire interface can be reconfig- ured for interfacing to a stand-alone microcontroller forisolated (2-wire) or nonisolated (3-wire) serial operation. additionally, for stand-alone microcontroller operation, the cmaxqusb interface is not required. a separate +3.3v power supply capable of supplying 100ma is required for the max5952a optically isolated i 2 c-compli- ant 3-wire interface. note that dgnd and gnd are short-ed by a pcb trace between the pads of resistor r72. the optical isolation consists of optocoupler u7 that provides galvanic isolation for the serial-interface clock line (scl) and serial-interface input data line signals. optocoupler u8 pro- vides galvanic isolation for the serial output and data line (sdaout) and int signals. the scl and sdaout signals 3-wire serial interface are combined on the isolated 2-wireside prior to feeding logic buffer u9. the scl_in, sda, int _out, opto_gnd, and opto_vcc pcb pads are used for a 2-wire isolated stand-alone operation. for noniso-lated stand-alone 3-wire operation, jumper ju9 shorting trace must be cut open and then the scl, sdain, sdaout, int , dgnd, and vdig pcb pads must be connected to the microcontroller circuit. note that the ev kit? provided vdig isat +3.3v. the opto_gnd and gnd, dgnd planes are iso- lated by the optical couplers. however, when using the ev kit in a nonisolated configuration, caution should be exer- cised since dgnd and gnd are shorted by resistor r72 pcb shorting trace. since gnd is more positive than vee, use an isolated oscilloscope when probing signals with respect to vee. the max5952a slave address is configured by four jumpers (ju1?u4) and can be configured from 0x40 through 0x5f hexadecimal serial address. global address 0x60 is accepted by the max5952a regard- less of the jumper settings. see table 1 for more infor- mation on setting the max5952a slave address. jumper selection the max5952a ev kit features several jumpers toreconfigure the ev kit for various pse configurations and pd requirements. additionally, jumpers and pcb pads are provided for connecting an external microcontroller. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 8 _______________________________________________________________________________________ 8 _______________________________________________________________________________________ max5952a i 2 c-compatible 2-wire or 3-wire slave address selection the max5952a ev kit features several 3-pin jumpers(ju1, ju2, ju3, ju4) to set the slave address of the max5952a least significant bits (lsb) of the slave address on the i 2 c-compatible 2-wire or 3-wire inter- face. the 3 most significant bits are set by themax5952a to 010. the ev kit? software automatically sets the lsb for the proper read/write command. table 1 lists the jumper addressing options. ju4 (bit a3) shunt ju3 (bit a2) shunt ju2 (bit a1) shunt ju1 (bit a0) shunt max5952a slave address read/write 0x40 read 2-3 2-3 2-3 2-3 0x41 write 0x42 read 2-3 2-3 2-3 1-2 0x43 write 0x44 read 2-3 2-3 1-2 2-3 0x45 write 0x46 read 2-3 2-3 1-2 1-2 0x47 write 0x48 read 2-3 1-2 2-3 2-3 0x49 write 0x4a read 2-3 1-2 2-3 1-2 0x4b write 0x4c read 2-3 1-2 1-2 2-3 0x4d write 0x4e read 2-3 1-2 1-2 1-2 0x4f write 0x50 read 1-2 2-3 2-3 2-3 0x51 write 0x52 read 1-2 2-3 2-3 1-2 0x53 write 0x54 read 1-2 2-3 1-2 2-3 0x55 write 0x56 read 1-2 2-3 1-2 1-2 0x57 write 0x58 read 1-2 1-2 2-3 2-3 0x59 write 0x5a read 1-2 1-2 2-3 1-2 0x5b write 0x5c read 1-2 1-2 1-2 2-3 0x5d write 0x5e read 1-2 1-2 1-2 1-2 0x5f write 0x60* read xxxx 0x61* write x = don? care. * global address calls. table 1. max5952a slave address selection downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system _______________________________________________________________________________________ 9 midspan/signal mode selection the max5952a ev kit features a 3-pin jumper (ju5) toset the max5952a in midspan or signal mode. table 2 lists the jumper options for the two modes used to detect a valid pd connected to the pse-respective ethernet output port. refer to the max5952 ic data sheet for more information on the modes. operational modes (automatic, shutdown) the max5952a ev kit features a 3-pin jumper ju6 toset the max5952a? initial startup operational mode. after startup, data sent to the mode register (0x12) reconfigures the operational mode of the max5952a. table 3 lists the jumper options. ac disconnect monitoring oscillator input the max5952a ev kit features a 3-pin jumper (ju7) toconfigure the max5952a? oscillator input at the osc_in pin. the oscillator is used for ac-disconnect monitoring of the pd. table 4 lists the jumper options for the two oscillator configurations available on the ev kit. 100hz oscillator shutdown the max5952a ev kit features a jumper to set the evkit? on-board 100hz oscillator modes of operation. table 5 lists the selectable jumper options to configure the 100hz oscillator. stand-alone microcontroller interface (isolated/nonisolated) the max5952a ev kit features pcb pads and a jumperto interface directly with a microcontroller. the 2 x 5-pin jumper ju9 has shorting connections on the bottom layer that must be cut open to disable the opti- cal coupler interface for nonisolated evaluation. the jumper shorting connections must be in place for evalu- ating an isolated stand-alone microcontroller interface. table 6 lists the selectable jumper options. table 2. jumper ju5 functions shunt location midspan pin max5952a mode 1 and 2 connected to vdig withresistor r14 midspan mode 2 and 3 connected to dgndwith resistor r14 signal mode table 3. initial startup operational mode ju6 shunt location auto pin mode register (0x12) status bits o per a t i o n a l m o d e 1 and 2 connected tovdig with resistor r15 0xff automatic 2 and 3 connected todgnd with resistor r15 0x00 shutdown table 4. jumper ju7 functions shunt location max5952a osc_in pin ev kit mode 1 and 2 connected toosc_input bnc connector ac disconnect detection using external 100hz oscillator 2 and 3 connected to ev kiton-board 100hz oscillator ac disconnect detection using ev kit on-board 100hz oscillator table 5. jumper ju8 functions shunt location u4, shdn pin 100hz oscillator mode 1 and 2 connected to vdig_f running 2 and 3* connected to gnd shutdown * see the bypassing ac disconnect and the dgnd-to-gnd connection (resistor r72) section. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 10 ______________________________________________________________________________________ max5952a port det_, out_, gate_, and sense_ pin signal measurements the max5952a ev kit features jumpers to facilitate cur-rent and voltage measuring at each port? respective det_, out_, gate_, and sense_ pins on the max5952a ic. several 2-pin and 2 x 3-pin jumpers are used to obtain the desired measurement for each port. jumpers ju11 and ju19 are provided for port 1, jumpers ju12 and ju20 are provided for port 2, jumpers ju13 and ju21 are provided for port 3, and jumpers ju14 and ju22 are provided for port 4. thejumper pins are shorted by a pcb trace on the bottom and top layer, respectively, of the ev kit by default for normal operation. the shorts can be cut open for mea- surements. see figures 5 and 7, the controller circuit and network schematics, for a specific port? jumper. table 6. jumper ju9 and microcontroller pcb pads function ju9 pin no. short location isolation mode max5952a ev kit pc pad to microcontroller connection 1 and 2 shorted* isolated opto_vcc pc pad connects to microcontroller +3.3v power supply. 3 and 4 shorted* isolated scl_in pc pad connects to microcontroller serial-clock line. 5 and 6 shorted* isolated sda pc pad connects to microcontroller sda data line. 7 and 8 shorted* isolated sda pc pad connects to microcontroller sda data line. 9 and 10 shorted* isolated int _out pc pad connects to microcontroller interrupt pin. isolated opto_gnd pc pad connects to microcontroller power-supply ground. 1 and 2 cut open nonisolated ju9-2 vdig pin supplies power to the microcontroller from vdig voltage. 3 and 4 cut open nonisolated ju9-4 scl pin connects to microcontroller serial-clock line. 5 and 6 cut open nonisolated ju9-6 sdain pin connects to microcontroller sda data line. 7 and 8 cut open nonisolated ju9-8 sdaout pin connects to microcontroller sda data line. 9 and 10 cut open nonisolated ju9-10 int pin connects to microcontroller interrupt pin. nonisolated tp dgnd connects to microcontroller power-supply ground. * default set by pcb trace. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 11 ac-disconnect operation (rectifier diodes d1?4) the max5952a ev kit features jumpers ju15?u18 tobypass each port? respective ac disconnect rectifier diode (d1?4), thus reducing diode power dissipation when ac disconnect is not required. table 7 lists the selectable jumper options for each port. also see table 8. ac-detection rc network the max5952a ev kit features jumpers ju19?u22 tobypass the ac-detection rc network when ac load dis- connect detection is not needed. the inclusion of this rc network does not affect other circuit parameters. each jumper has a pcb trace shorting it on the top layer. table 8 lists the selectable jumper options to reconfigure each port? ac detection network. see table 7 for bypassing the respective port? ac-disconnect diode. table 7. ac-disconnect jumper functions port jumper shunt position ac-disconnect rectifier diode open ac disconnect diode d1 active; ac disconnect function can be used. port 1 ju15 installed* ac disconnect diode d1 bypassed, no ac disconnect function. open ac disconnect diode d2 active; ac disconnect function can be used. port 2 ju16 installed* ac disconnect diode d2 bypassed, no ac disconnect function. open ac disconnect diode d3 active; ac disconnect function can be used. port 3 ju17 installed* ac disconnect diode d3 bypassed, no ac disconnect function. open ac disconnect diode d4 active; ac disconnect function can be used. port 4 ju18 installed* ac disconnect diode d4 bypassed, no ac disconnect function. * see the bypassing ac disconnect and the dgnd-to-gnd connection (resistor r72) section. table 8. ac-detection rc jumper functions port jumper short position ac-detection rc network cut open* rc network r22/c5 bypassed. port 1 ju19 installed rc network r22/c5 active; ac disconnect function can be used. cut open* rc network r26/c8 bypassed. port 2 ju20 installed rc network r26/c8 active; ac disconnect function can be used. cut open* rc network r34/c13 bypassed. port 3 ju21 installed rc network r34/c13 active; ac disconnect function can be used. cut open* rc network r35/c15 bypassed. port 4 ju22 installed rc network r35/c15 active; ac disconnect function can be used. * see the bypassing ac disconnect and the dgnd-to-gnd connection (resistor r72) section. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 12 ______________________________________________________________________________________ -48v port power interface or voltage measurement the max5952a ev kit includes jumpers ju27?u30 todisconnect each port? -48v power independently for connection to an external network interface circuit. additionally, the respective jumper? pins can be utilized to measure the voltage or current for the respective port. table 9 lists the specific jumper for each port. each jumper is shorted on the bottom layer of the pcb. shdn and reset signals the max5952a ev kit features four pushbutton switch-es (s1?4) to independently shut down each channel? power circuit. a reset pushbutton (s5) is also provided to reset the max5952a. header j2 (6-pin 0.100in cen- ter header) is available for monitoring the shdn1 , shdn2 , shdn3 , shdn4 , and reset signals routed to the max5952a pins. digital ground is provided at theheader on pin 6. see table 10, which lists the specific switch and header pin signals that can be interfaced with a ribbon cable or test leads. these signals are not isolated and are referenced to dgnd on the ev kit. bypassing ac disconnect and the dgnd-to-gnd connection (resistor r72) the ac disconnect detection function requires that theev kit? dgnd be connected directly to gnd. if the ac- disconnect detection function is not required, resistor r72, which shorts dgnd to gnd, can be removed. removing resistor r72 allows dgnd to be referenced to a voltage potential anywhere from v ee to (v ee + 60v). additionally, when resistor r72 is removed, the appropri-ate ac detection jumper tables must be set and the osc_in pin on the max5952a must be floating by removing jumper ju7. see tables 4, 7, and 8 for the appropriate jumper settings to bypass the ac detection function. refer to the ac disconnect monitoring section in the max5952 ic data sheet for additional information.if the ac-disconnect detection function is required again, install a 0 ?%, 1206 case size surface-mount resistor at the r72 pads and set the appropriate jumpers. detailed description of software a mouse or the keyboard? tab key is used to navigatevarious items on the main window. the max5952a ev kit software features window tabs to select a configuration , events and status , or bitmap controls window. most of the main window? available functions and a few more can be evaluated by usingthe pulldown menu. the left status bar at the bottom of the main window provides the cmaxqusb interface board status. the center status bar provides the current ev kit and macro engine status. table 10. switch and header j2 pinsignals switch signal header j2 pin s1 shdn1 1 s2 shdn2 2 s3 shdn3 3 s4 shdn4 4 s5 reset 5 dgnd 6 table 9. -48v port power interface jumper functions port jumper pcb trace short ev kit operation shorting trace intact normal operation port 1 ju27 cut open -48v_1 power available at pin 1* only shorting trace intact normal operation port 2 ju28 cut open -48v_2 power available at pin 1* only shorting trace intact normal operation port 3 ju29 cut open -48v_3 power available at pin 1* only shorting trace intact normal operation port 4 ju30 cut open -48v_4 power available at pin 1* only * pin close to u1. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 13 software startup upon starting the program, the max5952a ev kit soft-ware starts in the program? auto read state. the soft- ware automatically detects the slave address and begins reading the contents of each register from themax5952a, updating each tab window. the software starts up with the events and status window selected. events and status the events and status window provides the ev kit? system and port events/status information obtained fromthe max5952a ic registers. the system events and status section provides system-level information on the vee and vdd power supplies, oscillator input, presentoperating mode, and address in hexadecimal and deci- figure 1. in the max5952a evaluation software? events and status window for reading system and port events/status information, the current reading is not valid when the port is not enabled. downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 14 ______________________________________________________________________________________ mal formats. the port events section provides each pse port event or change. the port status section provides each pse port operating status during detection, classifi-cation, and current usage by the connected pd. configuration the configuration window provides a high-level method of configuring the max5952a ev kit as a 4-portpse. system and port level configurations can be made in this window. additionally, the max5952a watchdogtimer, max5952a ic, or a specific port can be immedi- ately reset using the respective reset button. all other configuration changes on this window take place afterthe update max5952a button has been selected. to view a specific port event or status after updating,select the events and status tab. each port? operat- ing mode, disconnect mode, detection/classification, figure 2. max5952a evaluation software? configuration window for configuring the ev kit as a 4-port pse downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 15 and various power settings can be set independently.after configuring the port or making system changes, select the update max5952a button to write these changes to the max5952a ic, thus updating the evkit? respective pse port. certain configurations may not be enabled, depending upon the max5952a cur- rent state or status. bitmap controls the bitmap controls window provides a bit-level method of configuring the ev kit as a 4-port pse. themax5952a register? contents are placed on the appro- priate line of the registers read tables in binary and hexadecimal format. if data changes between the nextregister read, the updated register hexadecimal data is displayed in red and blinks four times. the blink rate figure 3. max5952a evaluation software? bitmap controls window for controlling the software state, configuring the max5952a registers, using the macro engine, and displaying all the registers in binary and hexadecimal format downloaded from: http:///
evaluate: max5952a can be changed in the commands | red hex data blink rate menu. the left status bar at the bottom of the main window provides the cmaxqusb interfaceboard status. the center status bar provides the current ev kit and macro engine status. autoread/run macro state controls when the auto read checkbox is checked, the program continuously updates the main window registers and isoperating in the autoread state. in the autoread state, data can be written to the max5952a by entering or selecting the desired data in the register address and hexadecimal data or binary data combo boxes. selecting the write byte button writes the combo box data to the max5952a. to perform an immediate registerread, enter or choose the desired register address and choose the read byte button. hexadecimal or binary data can be entered in to the hexadecimal data or binary data combo boxes and then the alternate combo box displays the corresponding number in the respec-tive number base. if the auto read checkbox is unchecked, the pro- gram? main window displays register data from the lastread. to obtain current data, a read byte must be per- formed after selecting the appropriate register addressfrom the register address combo box. autoread state does not read the clear-on-read (cor) registers.a macro can be run after loading the file from the file | open macro menu. the opened macro is displayed in the upper half of the macro edit field and has an .smb file extension. selecting the run button runs the macro to completion and the output is displayed in the macro script output edit field. each edit box can be sized rela- tive to the other half using the splitter bar above thescript output text. selecting the single step button instead of the run button causes the macro to execute a single line with each activation of the single step button. the reset button is used to reset the macro script engine and clear the macro script output edit field. a macro can be run regardless of the auto read checkbox sta- tus. a macro can be run immediately after opening byusing the file | open | run macro menu, selecting the desired macro to run, and clicking on the open button. selecting the cancel button exits this feature. the locate slave button is used to search for a max5952a located on the i 2 c-compliant 2-wire serial interface whose address has been changed while thesoftware was running. the valid max5952a slave address range is 0x40 through 0x5f. the max5952a does respond to global address 0x60, although the evkit hardware cannot be set to this specific address. record macro state controls when the record checkbox is checked, the program automatically enters the record macro state and dis-ables certain buttons and menus. choosing the commands | clear script input menu clears any script presently in the macro script input edit field. comment lines in a macro script begin with a # / ; ?*character. a line of script is entered by choosing the appropriate slave address , register address , and entering the desired hexadecimal data or binary data in the combo boxes. then selecting the write byte or read byte button enters the script into the macro input edit field. for time delays in a macro, choose thedesired delay time from the combo box on the right side of the delay button and then select the delay but- ton. the macro must be saved before exiting the recordmacro state, using the file | save macro menu. the macro file must have an .smb file extension name.to edit a previously saved macro, open the macro using the file | open macro menu and make the desired edits. the modified file must be saved prior to exiting therecord macro state. uncheck the record checkbox to exit the record macro state. additionally, a macro can becreated or edited using a plain text editor in text mode. the file must be saved with an .smb extension. general-purpose 2-wire interface utility there are two methods for communicating with themax5952a: through the main window display or through the general-purpose 2-wire interface utility using the view | interface menu. the utility configures the i 2 c-compliant 2-wire interface parameters such as start and stop bits, acknowledgments, and clock tim-ing. the 2-wire interface screen allows you to send general-purpose, i 2 c-compliant, 2-wire commands using the smbus-writebyte/readbyte and writeword/readword commands. for more informa- tion on the differences between the i 2 c-compliant 2-wire interface and an smbus interface, refer to themaxim application note comparing the i 2 c bus to the smbus at www.maxim-ic.com. when using the 2-wire utility, the main window display no longer keeps track ofchanges sent to hardware. the ev kit can be reinitial- ized to the startup screen settings by resetting the max5952a using reset pushbutton s5. max5952a evaluation kit/evaluation system 16 ______________________________________________________________________________________ smbus is a trademark of intel corp. downloaded from: http:///
the hunt for active listeners button scans the entire 2-wire address space, reporting each address that isacknowledged. the smbuswritebyte transmits the device address, command, and 1 byte of data. thesmbusreadbyte transmits the device address, a com- mand, and then retransmits the device address andreads 1 byte of data. the smbuswriteword and smbusreadword operate the same, except 2 bytes of data are used. general troubleshooting problem: software reports it cannot find the board. is the cmaxqusb interface board power led lit? is the usb communications cable connected? has windows plug-and-play detected the board? bring up control panel | system | device manager and look at what device nodes are indicated forusb. if there is an unknown device node attached to the usb, delete it?his forces plug-and-play to try again. problem: unable to find device-under-test (dut). are the scl and sda signals pulled up to opto_vcc (cmaxqusb vdd)? the cmaxqusbdip switch sw1 enables the on-board resistors on the cmaxqusb interface board. there must be pullup resistors somewhere on the bus. if using jumper wires to connect, are the scl and sda signals swapped? is the ground return missing? evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 17 figure 4. 2-wire interface window provides direct low-level access to the max5952a downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 18 ______________________________________________________________________________________ short n5 d13 3 2 1 c1220 f 100v c61 f 100v gnd gnd vee vee vee d22 r24 10 r73 301k r21 100 1% r1 0.250 1% r5 0.250 1% r57 open r98 open gate1 vee ju15 c10 open ju23 r62 1k r23 51 midspan int scl sdaout sdain a3 a2 a1 a0 det1 det1 gate1 ju11-1 ju11 ju11-2 d1 d1 n1 1 2 3 4 5 6, 7, 8 d17 open -48v_1 vee tp3 vee det2det3 det4 dgnd agnd shd1shd2 shd3 shd4 n6 d14 3 2 1 r59 5.1k r58 5.1k gate2 vee r63 1k n7 d15 3 2 1 r60 5.1k gate3 vee r66 1k n8 d16 3 2 1 r61 5.1k gate4 vee r67 1k ju11-3 ju11-4 short short short ju11-5 ju11-6 short r27 10 r74 301k r28 100 1% r2 0.250 1% r6 0.250 1% r25 open r99 open ju16 c11 open ju24 det2 gate2 ju12-1 ju12 ju12-2 d2 d2 n2 1 2 3 4 5 6, 7, 8 d18 open -48v_2 vee ju12-3 ju12-4 short short short ju12-5 ju12-6 short r32 10 r75 301k r31 100 1% r3 0.250 1% r7 0.250 1% r33 open r100 open ju17 c12 open ju25 det3 gate3 ju13-1 ju13 ju13-2 d3 d3 n3 1 2 3 4 5 6, 7, 8 d19 open -48v_3 vee ju13-3 ju13-4 short short short ju13-5 ju13-6 short r64 10 r76 301k r65 100 1% r4 0.250 1% r8 0.250 1% r36 open r101 open ju18 c17 open ju26 det4 gate4 ju14-1 ju14 ju14-2 d4 d4 n4 1 2 3 4 5 6, 7, 8 d20 open -48v_4 vee ju14-3 ju14-4 short short short ju14-5 ju14-6 3536 1 2 3 1 c7 0.1 f c9 0.1 f c18 0.1 f r55 0.56 auto 3433 32 31 30 29 28 27 26 25 24 23 22 out1 gate1 sense1 out2 gate2 sense2 vee out3 gate3 sense3 out4 gate4 sense4 u1 osc vdd reset osc_in auto ju7 osc_input reset 2 midspan 3 int 4 scl 5 sdaout 6 sdain 7 a3 8 a2 9 a1 10 a0 11 det1 12 det2 13 det3 1415 16 det4 17 shd1 18 shd2 19 shd3 2021 shd4 vee vdig r68 0 max5952a high-power pse for power-over-ethernet figure 5. max5952a ev kit schematic, controller circuit downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 19 j1-1j1-3 j1-5 j1-7 opto_vcc opto_gnd opto_gnd opto_vcc opto_vcc opto_gnd opto_vcc opto_vcc opto_gnd female connector 2 x 10 j1 u9 u7 sda sda sda sda dgnd -48v_1-48v_2 -48v_3 -48v_4 -48v01x short ju27 12 r10 1k r29 3k r953k r97 180 r93k r533k r71 180 r963k r54 3k r77 3k r56 180 r94 180 r30 3k c38 0.1 f c3 1 f c360.1 f ju1 vdig a0 1 2 3 r11 1k ju2 a1 1 2 3 r12 1k ju3 a2 1 2 3 r13 1k ju4 a3 1 2 3 r14 1k ju5 midspan 6-pin header j2 1 2 3 r15 1k r16 1k ju6 s1 j2-1 auto shd1 1 2 3 1212 12 ju28ju29 ju30 short short short -48v02x-48v03x -48v04x dgnd gnd gnd dgnd gnd gnd opto_gndopto_gnd scl_in scl_in int_out opto_gnd opto_gnd scl_in vdig vdigvdig sclsdain sdaoutint j1-9 j1-11j1-13 j1-15 j1-17 n.c. a1 12 3 56 4 gnda2 vcc y1y2 an1 12 4 87 6 ca1an2 3 ca2 vcc vo1vo2 5 u8 vcc 87 6 12 4 vo1vo2 5 gnd an1ca1 an2 ca2 3 gnd n.c.n.c. n.c. n.c. n.c. j1-19 j1-2j1-4 j1-6j1-8 j1-10j1-12 j1-14 j1-16 j1-18 j1-20 short ju9 open short short short short ju9-2 ju9-1 ju9-4 ju9-3 ju9-6 ju9-5 ju9-8 ju9-7 ju9-10 ju9-9 r17 1k s2 j2-2 shd2 r18 1k s3 j2-3 shd3 r19 1k s4 j2-4 shd4 r20 1k s5 j2-5 j2-6 reset figure 6. max5952a ev kit schematic, optical coupler circuit downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 20 ______________________________________________________________________________________ d1 -48v01x p1 1 p2 2 p3 3 p4 4 p5 5 p6 6 p7 7 p8 8 p9 9 p10 10 j3-a port1-in 1-rd+ 2-rd- 3-td+ 4 5 6-td- 7 8 d5 d9 -48v_1 31 (lower-rj-45 input ports) (upper-rj-45 with integrated magnetics output ports) ju19 short -48v_1 gnd c260.1 f c63 0.1 f c61 0.1 f c251000pf 250vac c50.47 f r22 1k r3775 r3975 -48v02x c59 0.1 f c57 0.1 f c241000pf 250vac c22 1000pf 250vac r4175 r4375 -48v03x c47 0.1 f c55 0.1 f c211000pf 250vac r4575 r4775 -48v04x c49 0.1 f c51 0.1 f c201000pf 250vac r4975 r5175 r872.2m d2 d6 d10 -48v_2 31 ju20 short -48v_2 gnd c270.1 f c80.47 f r26 1k r882.2m d3 d7 d11 -48v_3 31 ju21 short -48v_3 gnd c280.1 f c130.47 f r34 1k r892.2m d4 d8 d12 -48v_4 31 ju22 short -48v_4 gnd chassis_gnd c290.1 f c150.47 f r35 1k r902.2m p1 21 p2 22 p3 23 p4 24 p5 25 p6 26 p7 27 p8 28 p9 29 p10 30 j3-c port2-in 1-rd+ 2-rd- 3-td+ 4 5 6-td- 7 8 p1 41 p2 42 p3 43 p4 44 p5 45 p6 46 p7 47 p8 48 p9 49 p10 50 j3-e port3-in 1-rd+ 2-rd- 3-td+ 4 5 6-td- 7 8 p1 61 p2 62 p3 63 p4 64 p5 65 p6 66 p7 67 p8 68 p9 69 p10 70 j3-g port4-in 1-rd+ 2-rd- 3-td+ 4 5 6-td- 7 8 1-rx+2-rx- 3-tx+ 6-tx- 4 5 7 8 j3-b port1-out 1-rx+ 2-rx- 3-tx+ 6-tx- 4 5 7 8 j3-d port2-out 1-rx+ 2-rx- 3-tx+ 6-tx- 4 5 7 8 j3-f port3-out 1-rx+ 2-rx- 3-tx+ 6-tx- 4 5 7 8 j3-h port4-out p5 15 p6 16 p8 18 p9 19 p10 20 p1 11 p2 12 p3 13 p4 c22-p7 c19 1000pf 250vac c22-p7 c19-p7 c19-p7 14 p7 17 p5 35 p6 36 p8 38 p9 39 p10 40 p1 31 p2 32 p3 33 p4 34 p7 37 p5 55 p6 56 p8 58 p9 59 p10 60 p1 51 p2 52 p3 53 p4 54 p7 57 p5 75 p6 76 p8 78 p9 79 p10 80 p1 71 p2 72 p3 73 p4 74 p7 77 figure 7. max5952a ev kit schematic, network interface downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 21 lpb bpa lpa bpa lpb vdig_f tp1 56 7 1 2 3 8 1211 10 9 c350.1 f c390.1 f c323.3 f c310.1 f c23 0.1 f c300.1 f c34 0.1 f c160.1 f c33 0.1 f r86 20k 1% r85 200k 1% r84 226k 1% r7810k 1% r6940.2k 1% r8346.4k 1% r79100 1% r8010k 1% r82 20k 1% r81 32.4k 1% r70 40.2k 1% r91 100 1% sagnd shdnvdd sb 16 12 3 4 lpb 15 bpb 14 nb/hpb 13 invb lpa bpa na/hpa inva com extclk clk no vdig_f vdig_f vdig_f no lpa ju8 vdig_f vdig_f vdig_f vdig vdig_f vdig_f tp2 tp0 12 3 4 87 6 5 out1out0 vcc gnd scl sda u4 ctrl1ctrl0 65 4 12 3 nocom n.c. in v+ gnd osc 2 13 4 87 5 6 out1in1+ in1- v ee vcc out2 in2+ in2- 12 3 inout gnd c144.7 f 6.3v max7491 max6106 u6 max4599 u2 u5 lmx358 u3 figure 8. max5952a ev kit schematic, 100hz oscillator circuit downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 22 ______________________________________________________________________________________ vdig vee vdig vdig r72 0 l1 68 h d21 1 1 1 2 2 2 3 3 3 q2 q3 n9 1 31 4 2 75 8 6 23 q1 vdig dgnd vdig(3.3v) c424.7 f 6.3v c40 0.015 f c440.1 f c452.2 f c480.22 f c460.0047 f c43 0.022 f c41 0.47 f 100v c21 f 6.3v c4220 f 6.3v r3822.1k 1% r4260.4k 1% r441.02k 1% r4022.1k 1% r921 1% r931 1% r482 r502 r46 1k r52 30 vdig fbv+ ss_shdn vdd ndrv cs u10 vcc gnd max5020 figure 9. max5952a ev kit schematic, +3.3v power-supply circuit downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 23 figure 10. max5952a ev kit component placement guide?omponent side downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 24 ______________________________________________________________________________________ figure 11. max5952a ev kit pcb layout?omponent side downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 25 figure 12. max5952a ev kit pcb layout?nd layer 2 downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system 26 ______________________________________________________________________________________ figure 13. max5952a ev kit pcb layout? cc layer 3 downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system ______________________________________________________________________________________ 27 figure 14. max5952a ev kit pcb layout?older side downloaded from: http:///
evaluate: max5952a max5952a evaluation kit/evaluation system maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 28 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2008 maxim integrated products is a registered trademark of maxim integrated products, inc. figure 15. max5952a ev kit component placement guide?older side downloaded from: http:///

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