general description the max17710gb20 evaluation kit (ev kit) is a fully assembled and tested pcb that contains all the com - ponents necessary to evaluate the performance of the max17710gb energy-harvesting charger and protector. the ev kit features the thinergy m micro-energy cell (mec201) from infinite power solutions, inc. (ips), a solid-state, rechargeable, thin-power solution. solar cells are installed on the ev kit as the power source for an energy- harvesting application. the solar cells demonstrate low- power charging of the mec with ambient light. the ic can regulate and charge from various energy-harvesting sources that can be added externally. the ev kit is a self-powered board. the ev kit output charges the thinergy mec with current as low as 1a. the ev kit provides test points to monitor the inputs and outputs, and jumpers to test the various settings. an led is included on the chg output to indicate if the boost is operating. the ic is available in a 12-pin utdfn package with an exposed pad. features s self-powered by on-board solar cells s thinergy micro-energy cell (mec201) included s variable switching frequency adjusts for input power levels s various test points included for evaluation s proven pcb layout s fully assembled and tested designation qty description ac+, ae, batt+, chg, fb, lce, pckp, reg, sel2, solar+ 10 red multipurpose test points ac-, gnd (x4) 5 black multipurpose test points batt 1 thinergy1mah micro-energy cell (mec) ips mec201-10pes or mec201-10ses c1, c24 0 not installed, ceramic capacitors (0603) c2 1 10 f f q 10%, 6.3v x5r ceramic capacitor (0603)murata grm188r60j106m c3 1 1 f f q 10%, 16v x7r ceramic capacitor (0603)murata grm188r71c105k c4, c7 2 0.1 f f q 10%, 50v x7r ceramic capacitors (0603)murata grm188r71h104k designation qty description c5 1 47 f f q 20%, 6.3v x7r ceramic capacitor (1210)murata grm32er70j476m c6 1 1000pf q 10%, 50v x7r ceramic capacitor (0603)murata grm188r71h102k d1 1 10v, 570ma schottky diode (sod323) diodes inc. zlls410ta d2 1 surface-mount schottky diode array (sot363) diodes inc. bas70dw-04-7-f d5 1 green led (0603) d6 0 not installed, zener diode (sod123) j1 1 6-pin right-angle male header ju1 1 4-pin (1 x 4) header ju2, ju4 2 3-pin headers ju3, ju5, ju6, ju7 4 2-pin headers max17710gb20 evaluation kit evaluates: max17710gb _________________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim?s website at www.maxim-ic.com. 19-6237; rev 0; 3/12 ordering information appears at end of data sheet. thinergy is a registered trademark of infinite power solutions, inc. component list downloaded from: http:///
designation qty description l1 1 1.5 f h, 1.5a inductor murata lqm2hpn1r5mg0 lx 0 not installed, 1-pin header n1 1 n-channel digital fetfairchild fdv301n r1 1 51k i q 5% resistor (0603) r2 0 not installed, resistor (0603) r3 1 10k i q 5% resistor (0603) r4, r5, r7 3 1m i q 5% resistors (0603) r6 1 10 i q 5% resistor (0603) r9 1 150 i q 5% resistor (0603) designation qty description r22 1 620 i q 5% resistor (0603) s1?s4 4 momentary pushbutton switches solar1, solar2, solar3 3 amorphous solar cells (single)china solar ks-2510 u1 1 energy-harvesting charger and protector (12 utdfn-ep*) maxim max17710gb+ ? 8 shunts ? 1 pcb: max17710gb20 evaluation kit supplier phone website china solar ltd. 86-755-8351-5659 www.solar-china.com diodes incorporated 805-446-4800 www.diodes.com fairchild semiconductor 888-522-5372 www.fairchildsemi.com infinite power solutions 303-749-4800 www.infinitepowersolutions.com murata electronics north america, inc 770-436-1300 www.murata-northamerica.com _________________________________________________________________ maxim integrated products 2 max17710gb20 evaluation kit evaluates: max17710gb component list (continued) component suppliers note: indicate that you are using the max17710gb when contacting these component suppliers. quick start required equipment ? max17710gb20 ev kit ? oscilloscope ? precision voltmeter procedure the ev kit is fully assembled and tested. follow the steps below to verify board operation: 1) verify that two shunts are installed on jumper ju1 (pins 1-2 and 3-4). solar cells solar1, solar2, and solar3 are connected in parallel as the power source. 2) install a shunt in the 2-3 position on jumper ju2 to connect the ic to the on-board mec through a 10 i resistor. important: the mec (batt) must always be connected before the solar cell or damage could result. always connect ju2 first and disconnect ju2 last. 3) install a shunt on jumper ju3 to connect the on- board solar cells as the power source. the solar cell voltage can be monitored on the solar+ test point. if verification with an external energy-harvesting source is required, remove the shunt from ju3 and apply the external power source to the solar+ test point. the power-source ground can connect to any gnd test point. 4) connect the oscilloscope probe to the chg test point. the chg test point is the output of the boost regula - tor. set the time division to 200ms and the voltage division to 1v. 5) under ambient light, the battery charges with a small current. the oscilloscope displays voltage pulses from the boost regulator. the boost output pulses because of the solar cells? limited current. 6) increase the ambient light source on the solar cells and observe the increase in frequency of pulses at the chg test point. 7) to turn on the internal regulator and enable the battery pack output, press the s1 button. 8) install shunts on jumpers ju5 and ju6. led d5 pulses with the voltage pulses at the chg test point. d5 is a visual indication of the boost output. 9) to measure the mec charging current, observe the voltage across resistor r6. a precision voltmeter is needed. the charging current can be as low as 1 f a and the voltmeter needs the precision to be able to pulse- average over several seconds of data. an average volt - age of 10 f v indicates a 1 f a average charging current. * ep = exposed pad. downloaded from: http:///
jumper shunt position description ju2 1-2 connects the ic charger output to the mec (batt) directly. to prevent possible ic damage, ju2 must always be the first jumper installed and the last jumper removed. 2-3 connects the ic charger output to the mec (batt) through a 10 i resistor (r6). use this setting to measure the charger current. to prevent possible ic damage, ju2 must always be the first jumper installed and the last jumper removed. not installed* the ic is not connected to the battery. ju3 installed the on-board solar cells power the ev kit. not installed* for low-voltage dc external energy-harvesting sources, remove this shunt and apply the power source to the solar+ test point. ju4 not installed* see the regulator output voltage (sel1) section. ju5 installed connects led d5 to the battery pack output (pckp test point). not installed* disconnects led d5 from the pckp test point. the pckp output can be used to power an external load. ju6 installed enables the led indicator. not installed* disables the led indicator. ju7 installed connects the resistor-divider to fb. not installed* does not connect the resistor-divider to fb. jumper shunt position description input power ju1 1-2 solar1 and solar2 are connected in parallel as the power source. medium 3-4 solar2 and solar3 are connected in parallel as the power source. medium 1-2* and 3-4* solar1, solar2, and solar3 are connected in parallel as the power source. high 2-3 and open solar2 is connected as the power source. low 200ms/div _________________________________________________________________ maxim integrated products 3 max17710gb20 evaluation kit evaluates: max17710gb detailed description of hardware the max17710gb20 ev kit is a fully assembled and tested pcb that contains all the components neces sary to evaluate the max17710gb energy-harvesting charger and protector. the ic is available in a 12-pin utdfn package with an exposed pad. the ev kit circuit uses a boost controller to regulate and charge the on-board thinergy mec201 (batt). the ev kit has three on- board solar cells that are connected in parallel. on-board jumpers and test points allow external power sources to power the ic. the ic has low reverse leakage to prevent discharge of the on-board energy cell. ambient light can charge the on-board mec with current as low as 1 f a table 2. jumper table (ju2?ju7)* default position. figure 1. chg test point voltage using on-board solar cells as the power source table 1. solar power options (ju1)* default position. downloaded from: http:///
sel1 ju4 shunt position reg (v) batt 1-2 1.8 gnd 2-3 2.3 unconnected not installed* 3.3 _________________________________________________________________ maxim integrated products 4 max17710gb20 evaluation kit evaluates: max17710gb charger the chg test point monitors the chg pin. the chg test point is connected to the output of the boost regulator and the chg pin is the input to the battery charger. the ic charges the mec based off the voltage on the chg test point. the power sources to the chg test point can come from solenoid, piezo, mechanical, or rf sources, and must exceed the mec voltage. when chg exceeds the mec voltage by 50mv, the ic uses the chg supply to charge the on-board mec. the ic is designed to use input supplies from energy-harvesting sources, which are highly variable, poorly regulated, and usually power- limited. apply the variable input supply source to the ac+ and ac- test points. the power source is rectified and supplied to the chg test point through the full-wave bridge diode (d2). internal boost for power sources that are lower than the battery voltage, such as solar or the above-mentioned sources, the ic features a boost converter to step up the voltage to charge the on-board mec. the output of the boost is the chg test point. the ic uses the voltage on the chg test point to charge the mec. an additional power source can be present on chg through the ac+ and ac- test points while the boost is active. figure 1 shows the chg test-point voltage observed on an oscilloscope with ambient light using the on-board solar cells as the power source. the number of pulses increase as the ev kit is brought closer to the light source and decrease when taken away from the light source. power sources the on-board power source is a parallel connection of three solar cells. the voltage can be monitored on the solar+ and gnd test points. the start-up voltage for the ic boost is approximately 750mv at the fb pin. to supply an external power source, remove the shunt from jumper ju3 and apply the power source to the solar+ and gnd test points. on-board micro-energy cell (batt) the ev kit features the thinergy micro-energy cell (mec) from ips as the on-board energy storage cell. the mec201 included on the ev kit is roughly the size of a postage stamp and is soldered directly to the board. caution: the mec case is conductive. to protect the mec, do not touch the mec with conductive material. mec pack power the ic has a regulator output and battery pack output (pckp) to provide power to external loads. the ic pckp test point provides the mec voltage to external loads while the reg test point provides a regulated voltage (table 3). external unregulated loads from the mec should always be connected through the pckp test point. external loads connected directly from the mec can cause irreversible damage to the mec if the voltage goes too low. led indicator on pack power the d5 led is connected through a digital fet at the pckp test point. the led blinks as pulses are generated at the chg test point. the led is a visual display that the boost regulator is operating. logic inputs the ev kit provides various pushbutton switches and test points to evaluate the device. there are two regulators internal to the ic, which are available through ae and lce. ae controls the default regulator and lce controls the low-current regulator. regulator output enable (ae) the ic features a default regulator that can be enabled by the ae signal. press the s1 switch to connect pckp and enable the default regulator. press the s2 switch to disconnect pckp and disable the default regulator output. the output voltage is selected by jumper ju4 (see table 3). if the mec voltage drops below 2.15v, the ae and pckp outputs are disabled until a charger is applied. low-current mode enable (lce) the ic features a low-current regulator that reduces the quiescent current by a factor of 5. the low-current regulator can be enabled by the lce and ae signals. to enter the low-current mode, first turn on the default regulator by pressing s1, then press s3 to enable the low-current regulator, and finally turn off the default regu - lator by pressing s2. afterwards, press s4 to disable the low-current regulator. if low-current mode is enabled, pressing s1 enables the default regulator, but pressing s2 switches back to the low-current regulator if originally enabled. if the mec voltage drops below 3v, the ae and pckp outputs are disabled until a charger is applied. regulator output voltage (sel1) table 3 shows the regulator output options. sel1 is con - nected to jumper ju4. the regulator output is locked when the regulator is active. to change the regulator output voltage, first change the setting on jumper ju4 to obtain the desired output voltage (table 3), then press s2 and s4 to disable both the default and low-current regulators. lastly, press s1 to enable the default regula - tor and optionally s3 to enable the low-current regulator. the regulator output voltage can be monitored on the reg test point and outputs the new voltage. table 3. regulator output voltage (sel1) * default position. downloaded from: http:///
_________________________________________________________________ maxim integrated products 5 max17710gb20 evaluation kit evaluates: max17710gb figure 2. max17710gb20 ev kit schematic downloaded from: http:///
1.0?? 1.0?? 1.0?? 1.0?? _________________________________________________________________ maxim integrated products 6 max17710gb20 evaluation kit evaluates: max17710gb figure 3. max17710gb20 ev kit component placement guide?component side figure 5. max17710gb20 ev kit pcb layout?solder sidefigure 6. max17710gb20 ev kit component placement guide?solder side figure 4. max17710gb20 ev kit pcb layout?component side downloaded from: http:///
part type MAX17710GB20EVKIT# ev kit _________________________________________________________________ maxim integrated products 7 max17710gb20 evaluation kit evaluates: max17710gb ordering information # denotes rohs compliant. downloaded from: http:///
revision number revision date description pages changed 0 3/12 initial release ? 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. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 8 ? 2012 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. max17710gb20 evaluation kit evaluates: max17710gb revision history downloaded from: http:///
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