general description the max14670 evaluation kit (ev kit) is a fully assembled and tested circuit board that demonstrates the max14670 and max14671 bidirectional current-blocking, high-input overvoltage protectors with adjustable ovlo. the ev kit features led output reading and a usb-powered option for logic pins. benefts and features 3v to 28v operating voltage range evaluates bidirectional ovlo and adjustable ovlo proven pcb layout fully assembled and tested 19-6800; rev 0; 9/13 ordering information appears at end of data sheet. designation qty description c1, c2 2 1f 10%, 6.3v x5r ceramic capacitors (0603) murata grm188r60j105ka01d c3 1 4.7f 20%, 6.3v x5r ceramic capacitor (0603) tdk c1608x5r0j475m080ab c4, c5 2 0.1f 10%, 50v x7r ceramic capacitors (0603) murata grm188r71h104ka93d c6, c7 2 1f 10%, 25v x5r ceramic capacitors (0603) murata grm188r61e105ka12d c8 1 0.1f 10%, 25v x7r ceramic capacitor (0603) murata grm188r71e104ka01d j1 1 usb-b connector fci 61729-0010blf j2Cj4 3 power terminals phoenix contact 1729018 ju1Cju3, ju5, ju7, ju8 6 2-pin single-row headers ju4, ju6 2 3-pin single-row headers led1 1 red led lite-on ltst-c150ekt led2, led3 2 green leds osram opto lg n971-kn-1 r1, r11, r12, r15, r16 5 1k 1% resistors (0805) r2, r18, r20 3 100k 1% resistors (0805) r3, r13, r14 3 10k 1% resistors (0805) designation qty description r4 1 23.2k 1% resistor (0805) r5 1 9.31k 1% resistor (0805) r6 1 20k potentiometer bourns 3266w-1-203lf r7Cr10 0 not installed, resistors (0805) r17, r19 2 22k 5% resistors (0805) tp1, tp8, tp10, tp11, tp18 5 red test points tp2, tp3, tp9, tp12, tp13 5 black test points tp4, tp14 2 white test points tp5, tp15 2 yellow test points tp6, tp16 2 orange test points tp7, tp17 2 green test points u1 1 bidirectional overvoltage protector (15 wlp) maxim max14670ewl+ u2 1 bidirectional overvoltage protector (15 wlp) maxim max14671ewl+ u3 1 dual inverter (6 sc70) fairchild nc7wz04p6x u4 1 ldo linear regulator (6 sot23) maxim max8880eut+ 8 shunts 1 pcb: max14670 evkit component list evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 2 quick start required equipment max14670 ev kit 25v dc power supply multimeter usb-a male to usb-b male cable or 5v dc power supply procedure the ev kit is fully assembled and tested. follow the steps below to verify board operation: 1) verify that all jumpers are in their default positions. 2) connect the usb cable to j1 from a computer (or connect 5v dc power supply to tp8). 3) verify led1 is on. 4) connect 6v dc power supply to tp1. verify out (tp18) is 6v and led2 is on. 5) increase voltage on dc power supply to tp1. verify out voltage goes down and led2 is off when input reaches about 6.8v (ovlo). 6) turn off the power supply and remove it from tp1. connect it to tp11 and set the voltage to 15v. 7) turn on the power supply and verify out (tp18) is 15v and led3 is on. 8) increase voltage on dc power supply to tp11. verify out voltage goes down and led3 is off when input reaches about 15.5v (ovlo). detailed description of hardware the max14670 ev kit is a fully assembled and tested cir - cuit board demonstrating the max14670 and max14671 bidirectional current-blocking, high-input overvoltage protector ic in a 15-bump surface-mount wafer-level package (wlp). the ev kit also features leds to indicate the power for logic pins and acok status (see table 1). pullup voltage the ev kit features jumpers to select pullup voltage (v cc ) for otg_en. install a jumper in positions shown in table 2 to change the voltage. note: indicate that you are using the max14670 when contacting these component suppliers. *default position. table 1. led indicator (led1Cled3) table 2. pullup voltage (ju1Cju3) supplier phone website bourns, inc. 408-496-0706 www.bourns.com fci electronics interconnection solutions 800-237-2374 www.fciconnect.com lite-on, inc. 408-946-4873 www.us.liteon.com murata americas 800-241-6574 www.murataamericas.com osram opto semiconductors 888-446-7726 www.osram-os.com phoenix contact, inc. 800-888-7388 www.phoenixcontact.com tdk corp. 847-803-6100 www.component.tdk.com led description led1 led1 is on when vbus/5v supply for logic pins is powered. led2 led2 is on when max14670 acok is asserted. led3 led3 is on when max14671 acok is asserted. jumper shunt position description ju1 installed* v cc is set to 1.8v through r4. not installed v cc is not set through r4. ju2 installed v cc is set to 2.6v through r5. not installed* v cc is not set through r5. ju3 installed v cc is set through r6 (variable). not installed* v cc is not set through r6. component suppliers www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 3 ovlo threshold use jumpers ju4 and ju6 to select internal or external ovlo threshold (see table 3 for jumper settings). use these equations to calculate the external ovlo threshold: max14670: in_ovlo ovlo_th r7 vv 1 ?? = + ?? ?? max14671: in_ovlo ovlo_th r9 vv 1 ?? = + ?? ?? otg enable input use jumpers ju5 and ju7 to select otg_en high or low (see table 4 for jumper settings). two inputs the ev kit features jumper ju8, which can be set to dem - onstrate using two devices for two input sources to one output (see table 5 for jumper settings). *default position. *default position. *default position. table 3. ovlo threshold (ju4, ju6) table 4. otg enable input (ju5, ju7) table 5. two inputs (ju8) jumper shunt position description ju4 1-2 max14670 ovlo is connected to r7/r8 voltage divider (external ovlo threshold). 2-3* max14670 ovlo is connected to ground (internal ovlo threshold). ju6 1-2 max14671 ovlo is connected to r9/r10 voltage divider (external ovlo threshold). 2-3* max14671 ovlo is connected to ground (internal ovlo threshold). jumper shunt position description ju5 installed max14670 otg_en is connected to v cc not installed* max14670 otg_en is connected to ground ju7 installed max14671 otg_en is connected to v cc not installed* max14671 otg_en is connected to ground jumper shunt position description ju8 installed max14671 acok is connected to devices ovlo not installed* max14671 acok is not connected to devices ovlo www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 4 figure 1. max14670 ev kit schematic 1.8v adj gnd protected 2.6v usb input power input power gnd output power gnd input power tp2 open open r10 r9 0.1uf 50v c4 tp11 1 open open r8 r7 u1 1% 22k ju7 1uf vbus 61729-0010blf b3 b4 r12 1uf led2 nc7wz04p6x acok tp4 u1_acok vcc 100k tp8 out u2_acok out tp17 u1_acok led1 1% 1k r1 5v gnd 9.31k ju1 20k ju2 r16 u1acok tp7 r15 1% led3 1 50v c5 tp12 2 u3 3 c1 2 c1 b2 max14671 c8 0.1uf 6 2 22k otg_en ovlo ju6 max14670 c5 1 2 tp15 b1 a4 1k 6.3v 100k r2 1 4.7uf c3 6.3v 4 3 max8880eut acok tp14 j2 1 c2 1uf 1k 1% c2 c2 6.3v ju8 c1 tp3 1% vbus j3 23.2k u2_acok u2acok r20 r19 u2 b3 c5 0.1uf c3 a3 tp6 r5 acok 1 r6 1 1% vcc 6 2 4 5 4 2 ju3 j4 1 j1 b2 1 tp5 r11 ju5 2 3 otg_en ju4 2 2 a2 b5 a5 b1 a2 2 1 tp16 2 a5 c4 a1 1 10k tp10 1uf 5 1% 1 1% r4 vcc 1% a4 2 r18 1% vbus r3 tp9 ovlo 2 b4 1 3 1% 100k c6 a1 c3 c4 tp1 6 a3 out tp18 r17 c7 vbus 1 u4 b5 acok tp13 3 1k 1k 2 gnd r13 r14 1% 1% 5 10k 10k in in 2a 1a 1y gnd vcc 2y in in in in s2 s1 gnd d+ d- vbus 3 2 1 fb pok out in gnd shdn otg_en acok acok in in in in in out out out out out gnd ovlo otg_en acok acok in in in in in out out out out out gnd ovlo www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 5 figure 2. max14670 ev kit component placement guide component side figure 3. max14670 ev kit pcb layoutcomponent side 1? www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 6 figure 5. max14670 ev kit pcb layoutinternal layer 2 figure 4. max14670 ev kit pcb layoutinternal layer 1 1? 1? www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 7 figure 6. max14670 ev kit pcb layoutsolder side 1? www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
maxim integrated 8 #denotes rohs compliant. part type MAX14670EVKIT# ev kit ordering information www.maximintegrated.com evaluates: max14670/max14671 max14670 evaluation kit
? 2013 maxim integrated products, inc. 9 revision number revision date description pages changed 0 9/13 initial release revision history maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. evaluates: max14670/max14671 max14670 evaluation kit for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.
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