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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||| charger controller with fuel - guage & lcd/led display 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 1 pt 8 a 2707 - 12/17 - 19 product features ? 2 - 3 cells, nicd or nimh battery fast - charger controller for battery - embedded devices ? precise 7 - bit fuel - gauge - counter measures charging and discharging current through battery pack. make it possible to accurately indicate battery capacity through lc d (pt8a2707 - 09/2717 - 19) or leds (pt8a2710 - 12) . ? integrated with a dc/dc step - down controller make it possible for customers to manufacture just one pcb module that can : ? c over different product models that requires different charging current/speed by changing only one resistor; ? w ork with different kinds of ac/dc adapters with wide input voltage ranges . ? motor also can work in both corded or cordless conditions. when motor is used in cord - mode, the charging current to battery is regulated at a maximu m value of 1/10 of the fast - charging current. the battery is just like being slowly - charged and pr event ed from being exposed to a prolonged high - current charging profile. ? provide excellent charge and discharge p rotections . ? available with different parts to cover products employing s lide s witch (pt8a2707/1 0 /1 7 ), t act s witch (pt8a270 8/09 / 1 1 /1 2 /1 8 /1 9 ) input to control motor on/off . two - step motor - speed control ( 70%, 100% ) is also available in pt8a2708/ 2711/ 2718. ? very l ow standby current of typical 20 ? a . produ cts c ould typically work in standby - mode for a few months, depends on battery capacity. technology highlights ? employing 5 major charging states: cool - down / pre - charge / fast charge / trickle charge / stop charge, taking the best care for different batte ry conditions, especially for aged or dry batteries ? excellent battery protection and full - charge detection schemes ? negative delta voltage detection ( - v) with precision of +/ - 1 mv step ? maximum battery voltage detection to turn to maintenance ? rate of change of temperature detection (dt/dt) best for nimh batteries full - charge termination (use with ntc) ? abnormal high battery temperature (55 ? c) detection to stop charging (use with ntc) ? flexible fast charge time - out setting (30mins/60mins/90mins/ 150mins) ? fuel - ga uge counter takes into account the battery self - discharge compensation based on time. ? provide excellent battery over - discharge protection through auto - stop motor at once ( < 0. 2 s) when ? discharging current is higher than preset limit value for 3sec (3 limit values selectable externally) ? battery pack voltage is lower than no - p ower value (adjustable externally) ? ntc measures battery pack temperature higher than preset high - temp value(adjustable externally) ? key delay to reject multiple inputs at tact switch (ab out 0.125s ignorance). ? internal voltage regulator provides better rejection to interference. ? integrated dc/dc step - down controller to regulate constant charging current s at different charging ? available with 24 - pin soic and ssop lead - free package
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| || 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 2 pt 8 a 2707 - 12/17 - 19 cha rger controller with fuel - guage & lcd/led display descri ption the pt8a2707 - 12/2717 - 19 integrates charger controller and fuel - gauge into a single - chip. it detects full - charge through - ? v , dt/dt, safety - ti mer and maximum battery voltage, and learns the battery capacity from each charging/discharging cycle. s ince pt8a2707 - 12/2717 - 19 measures charge/discharge current to account for the battery capacity in/out respectively, the battery capacity can be accurately recorded and displayed in 6 - level (10%/20%/40%/60%/80%/1 00%) led or lcd pattern. t he continuous - learning c apability enables the devices to take care of battery aging effect so that the capacity level is always accurately displayed throughout the life - span of the battery pack. i n the charging control, a dc/dc controller is regulated to regulate constant current s for pre - charge, fast - charge and trickle - charge conditions. t he charging current is determined by the value of a current - sense resistor such that it is tunable upo n different applications requirements. w hen motor is turned on during charging, the charge c urrent to battery pack is regulated at 1/10 of the fast - charge current so that motor can draw current from the adapter while battery is charged in a safe and under - controlled condition. t he pt8a2707 - 12/2717 - 19 employs ntc as the means to measure the batter y pack temperature. w hen a high temperature is measured during charging, the charging current will be cut off. the devices also detect ntc short/open at which all activities will be disabled if any one of these conditions is observed. function c ompariso n table f amily members t act switch (on/off) s lide switch (on/off) dstact switch (on ( 7 0%) / 10 0% / off) lcd led motor speed (70% pwm) lcd/led display in idle mode pt8a2707 ? ? ? pt8a2708 ? ? ? ? pt8a2709 ? ? ? pt8a2710 ? ? pt8a2711 ? ? ? pt8a2712 ? ? pt8a2717 ? ? pt8a2718 ? ? ? pt8a2719 ? ?
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 3 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display flow chart idle pre charge motor fast charge full charge stop charge > 55 ? c cord on/off motor on /off (2) (3)(4) full bat. ( 6 ) cord on/off ( 7 ) power u p (1) note s : 1) the system goes to idle when it is power - up. the system is waked up when cord is plugged, motor is turned on or both. 2) m otor is turned on /off by tact switch or slide switch. 3) motor will be turned off automatically when: a) the voltage of the battery pack is low er than 1.8v or (adjustable externally) ; b) the motor is drawing current more than the preset limit or (adjustable externally) ; c) the battery pack temperature is higher than 55 ? c (adjustable externally) 4) during charging when motor is turned on, the charging current is regulate d at 1/1 0 of the fast - charging current. when motor is turned off, the system will determine to go back to pre - charge/fast - charge/full - charge according to the battery usage condition (more details could be obtained in the operation description). 5) enter fast - charging when a) battery temp erature is less than 45 ? c b) battery voltage is higher than 2v or after pre - charging for 3 minutes 6) enter full - charge state when one of the following full - charge criteria is reached: a) safety timer timeout (4 external selections) b) max. voltage 3.4v (adjustable externally) c) - ? v d) dt/dt (adjustable by component selections) 7) if the battery pack is previously fully - charged without any usage or self - discharged enough, the charger goes directly to maintenance (trickle charge) when cord is plugged again. 8) charger stops charging current when battery temperature is higher than 55 ? c but resume for charging when battery temperature falls below 45 ? c fast chg ( 5 ) ? 45 ? c > 55 ? c > 55 ? c ( 8 ) ( 8 ) ( 8 ) motor on /off (2) (3 ) (4) motor on /off (2) (3) motor on /off (2) (3)(4) motor on /off (2) (3) ? 45 ? c cord off cord off
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 4 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display pin assignment and description pt8a27 07/17 pins assignment pt8a27 08/18 pins assignment pt8a27 09/19 pins assignment table 1 : pt8a2707 - 2709 and pt8a2717 - 2719 lcd pattern p in d escription pin i/o name descriptions 1 o charge pwm dc/dc controller output for constant current regulation 2 i cord external dc supply existence detection 3 i test quick test mode 4 o bp bp for lcd back plane driver 5 o l100 fuel gauge output (remaining 100% capacity, full charge indication) 6 o l 8 0 fuel gauge output (remaining 8 0 % capacity) 7 o l 6 0 fuel gauge output (remaining 6 0% capacity) 8 o l40 fuel gauge output (remaining 4 0% capacity) 9 o l20 fuel gauge output (remaining 2 0% capacity) 1 0 o bli b attery - low output (remaining <1 0% capacity) 1 1 - gnd ground 1 2 i/ o motor motor driver control 13 i slide slide switch (pt8a2707 / 17 ) input to cont rol motor running dstact tact switch (pt8a2708 / 18 ) input to control motor running with dual speed s tact t act switch (pt8a2709 / 19 ) input to control motor running 1 4 i vb charging battery voltage sense input 1 5 i vblow low - battery voltage sense i nput 1 6 i vt temperature sensor (ntc) input 1 7 o vee regulated output voltage 1 8 o timer charging protection timer 19 - vdd supply voltage 2 0 i/o cc compensation capacitor for dc/dc converter 2 1 i isen com current sense reference plane 2 2 i isen fg f uel gauge c urrent sense input 23 i isendc dc/dc controller current sense input 24 i vmstop motor stop current limit value select input pin config current limit gnd 4.2x charging current 0.6 - 1.0v 5x charging current vdd 3x charging curr ent charge bli l20 l 100 test l 80 vb low isen dc 5 6 7 8 2 0 19 18 1 7 bp cord pt8a27 09/19 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 60 l 40 isen fg 4 vmstop vt vb cc 11 12 1 4 13 tact motor gnd charge bli l20 l 100 test l 80 vb low isen dc 5 6 7 8 20 19 18 1 7 bp cord pt8a27 08/18 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 60 l 40 isen fg 4 vmstop vt vb cc 11 12 1 4 13 dstact motor gnd charge bli l20 l 100 test l 80 vb low isen dc 5 6 7 8 20 19 18 1 7 bp cord pt8a27 07/17 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 60 l 40 isen fg 4 vmstop vt vb cc 11 12 1 4 13 slide motor gnd
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 5 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display pt8a27 1 0 pins assignment pt8a27 11 pins assignment pt8a271 2 pins assignment table 2 : pt8a2710 - 2712 led pattern p in d escription pin i/o name descriptions 1 o charge pwm dc/d c controller output for constant current regulation 2 i cord external dc supply existence detection 3 i test quick test mode 4 o l100 fuel gauge output (remaining 100% capacity, full charge indication) 5 o l 8 0 fuel gauge output (remaining 80 % capacity) 6 o l 6 0 fuel gauge output (remaining 6 0% capacity) 7 o l40 fuel gauge output (remaining 4 0% capacity) 8 o l20 fuel gauge output (remaining 2 0% capacity) 9 o na na for pt8a2710/12 lturbo motor turbo - mode indicator ( pt8a2711 )[normal speed, off] 1 0 o bli b attery - low output (remaining <1 0% capacity) 1 1 - gnd ground 1 2 i/ o motor motor driver control 13 i slide slide switch (pt8a2710) input to control motor running dstact tact switch (pt8a2711) input to control motor running with dual spee d s tact t act switch (pt8a2712) input to control motor running 1 4 i vb charging battery voltage sense input 1 5 i vb low low - battery voltage sense input 1 6 i vt temperature sensor (ntc) input 1 7 o vee regulated output voltage 1 8 o timer charging pro tection timer ( 1hr/1.5hrs/2.5hrs/4hrs ) 19 - v dd supply voltage 2 0 i/o cc compensation capacitor for dc/dc converter 2 1 i isen com current sense reference plane 2 2 i isen fg fuel gauge c urrent sense input 23 i isendc dc/dc controller current sense inpu t 24 i vmstop motor stop current limit value select input pin config current limit gnd 4.2x charging current 0.6 - 1.0v 5x charging current vdd 3x charging current charge bli na l 80 test l 60 vb low isen dc 5 6 7 8 20 19 18 1 7 l100 cord pt8 a27 10 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 40 l 20 isen fg 4 vmstop vt vb cc 11 12 1 4 13 slide motor gnd charge bli lturbo l 80 test l 60 vb low isen dc 5 6 7 8 20 19 18 1 7 l100 cor d pt8a27 11 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 40 l 20 isen fg 4 vmstop vt vb cc 11 12 1 4 13 dstact motor gnd charge bli na l 80 test l 60 vb low isen dc 5 6 7 8 20 19 18 1 7 l100 cord pt8a27 12 timer 2 3 23 22 21 vee 1 24 isencom v dd 9 10 16 15 l 40 l 20 isen fg 4 vmstop vt vb cc 11 12 1 4 13 tact motor gnd
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 6 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display function description (refer to flow chart ) 1. b attery v oltage d efinitio ns: ta b le 3 : battery voltage definition item general setting suggested value rem ark n o - p ower value 0.9v - 1.0v/cell 1.8 - 2v for 2cells battery pack a djustable externally , please refer to ?application instruction? battery - low value 1.0v - 1.1v/cell 2.0 - 2.2 v for 2cells battery pack max vb 1.65v - 1.7v/cell 3.3 - 3.4v for 2cells battery pack 2. charging mechanism (cord is connected but motor is off) when a cord is detected, pre - charge begins. if the battery voltage is higher than battery - low threshold (usuall y set between 0.95v - 1.1v/cell) and the battery pack temperature is less than 45 ? c, fast - charge starts. otherwise, the battery will be kept in pre - charge status until its voltage is higher than the preset battery - low value or a 3 minutes time - out is reached to enter fast - charge mode. if battery temperature is found increasing to 55 ? c during pre - charge state, battery charging is stopped (dc/dc cuts power) to enter cool down state . nevertheless, pre - charge will continue in any case until the battery temperatur e is cooled down below 45 ? c. when entering fast - charge mode, if the battery voltage is below a preset voltage level (usually set at about 1.3v - 1.4v /cell , measured with charging current ), a start - up timer is effective to avoid false triggering of - v and d t/dt to have early fast - charge termination. during the start - up time, - v and dt/dt detections are ignored but maximum temperature of 55 ? c will always be observed to stop fast - charge. the start - up timer is dependent to the external fast - charge time r setting as tabled below. the dt/dt data is valid for battery temperature in range of 35 ? c to 55 ? c. table 4 : start - up time timer tmax (user programmable externally) s tart - up timer for inhibiting negative ? v and dt/dt measurement tmax/20 tmax ( min ) star t - up time ( s ) 30 90 60 180 90 270 150 450 fast charge mode is terminated when any one of the following conditions meet: 1) minus - delta - v detection ( - ? the battery pack voltage is sampled by high precision a/d converter every 10s, with 0.5s sampling time. for each sampling interval (0.5s), the charging current is cut down . averaging is performed on the collected data and the result is stored into registers after passing through high - order digital filter. the minus - delta - v is qualified when a voltage d rop of about 5 mv/cell from the maximum voltage recorded . the second minus - delta - v is qualified when a voltage drop of about 5mv/cell after the first minus - delta - v has been qualified . every minus - delta - v happened, fuel - gauge increased one level up, and so a nd so until fuel - gauge is full. table 5 : sample description bypass start - up timer vb > 2.6 v (measured by sampling) vb sampling period (tp) 1 0s vb sampling time 0.5 s (fast - charging inhibition) bt sampling period (tp) 10s (time - multiplexing with vb sa mpling) 2) maximum battery voltage detection: when the averaged battery pack voltage reaches a preset maximum voltage limit (usually set about 1.6v - 1.7v/cell) during the charging interval, fast - charge in terminated. 3) battery tempe rature detection (max. temp and dt/dt): the pt8a2707 - 12/2717 - 19 employ s thermistor (ntc) as battery temperature sensor. when the battery temperature reaches 5 5 ? c , fast - charge is terminated and the battery will then go to cool down mode; or the rate of tempe rature change (dt/dt) reach es preset value, fast - charge is terminated and the battery will then be under trickle - charge mode at a rate of 1/10 of the fast - charge current . if ntc is not employed, the pin vt should be biased at an equivalent voltage as for 10 ? c - 20 ? c or else the pt8a2707 - 12/2717 - 19 determines the ntc is opened and will stop all charging activity forever . vb measurement bt mea surement t p =0.5s
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 7 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 4) fast - charge timer cut - off: the pt8a2707 - 12/2717 - 19 come s with 4 timer setting s ( 30min s/ 60min s/ 90min s / 150min s) selectable externally throug h resistor divider. the fast - charge timer works as the last protection to prevent over - charging the battery if none of the above 3 terminations take s effect. in general, the timer is chosen according to the required time to fully - charge an empty battery wi th about 20 - 30% margins . the timer can be easily calculated at a given charging current and battery capacity. 5) ntc o pen or s hort during battery charging , the pt8a2707 - 12/2717 - 19 always detects ntc status by measure vt voltage value. if ntc open/short is de tected, all charging activities will be stopped and go to stop - charging mode. after fast - charge, the battery is charged at a rate of 1/10c to compensate for the self - discharge rate so as to maintain the battery capacity always at full as long as the cord is still connected. if the battery temperature continues to rise to 55 ? c during maintenance , the pt8a2707 - 12/2717 - 19 will cut - off the charge current until the battery temperature reduces to below 5 5 ? c to resume. after full - charge is detected, the pt8a2707 - 12/2717 - 19 will restore the full - charge status until it measures its capacity drops 5% of charge due to self - discharge (cor d was removed) of battery or motor is turned on. during the time the pt8a2707 - 12/2717 - 19 keep s the full - charge status internally, if user detaches motor and plugs - in cord to charge the shaver again, the pt8a2707 - 12/2717 - 19 w ill go to trickle - charge mode. 3. discharging mechanism (motor is on while cord is not connected) slide, tact and dstact are motor running control switch inputs. 1) slid e switch mode: pt8a2707/17/10 uses a pull high slide switch to control motor running through slide pin. when slide switch is closed, the slide pin is pull ed high, and the motor is always turned on at 100% speed (full speed), else if slide switch is open, t he motor is always turned off to stop motor running. 2) tact switch mode: pt8a 2709/19/ 12 uses a pull high tact switch to control motor running through tact pin. w ith 1 st pressing of tact switch, the motor is always turned on at 100% speed (full speed), and wi th 2 nd pressing of tact switch, the motor is always turned off to stop motor running. when using tact switch mode, t he key delay for tact switches to reject multiple inputs are typically about 0. 125 s. 3) dstact switch mode: pt8a 2708/18/ 11 uses a pull high tac t switch to control motor running with dual speed through dstact pin. w ith 1 st pressing tact switch , the motor is turned on at 70% speed , with 2 nd pressing of tact switch, the motor is turned to 100% speed (full speed) , and motor is turn off to stop runnin g with 3 rd pressing of tact switch. when using dstact switch mode, t he key delay for tact switches to reject multiple inputs are typically about 0. 125 s. i n above 3 models, b atter y over - discharge protection is available through auto - stop motor at once ( < 0. 2 s) when ? battery discharging current is higher than preset current limit for 3s ec ( there are three limit value s selectable refer to ? motor - over - current protection settings ? ) ? b attery pack voltage is lower than the preset no - p ower limit value (typically abou t 0.9 - 1.0v per cell). ? n tc measures battery pack temperature higher than the preset limit (usually about 5 5 - 60 ? c ) the motor can be resumed when any of the above criteria is cleared . b ut for slide switch model, user needs to turn off and turn on slide switch to start motor again; for tact and dstact switch model s , the user needs to press the tact switch once to start motor . 4) b attery low a lar m: t he pt8a2707 - 12/2717 - 19 detects battery capacity through output voltage level by vblow pin. when battery voltage is do wn to battery - low value (battery capacity is below 10%) , battery - low alarm is alert, and controls battery - low lcd screen or led (which is connected to bli pin10) to remind user that battery is under low capacity condition. if battery voltage continues go d own and decreases to no - power value, the motor will self shut down to protect battery be over discharged. t he battery - low lcd segment and led indications as below table. table 6 : battery alarm conditions item condition battery - low led battery - low lcd n o cord m otor on on on motor off blinking 5s on c ord is on m otor on on m otor off on 4. cord is connected while motor is on when cord is connected while motor is on, or vice versa, t here are two scenarios: 1) the motor is turned on and draws more current than the ac/dc adapter can supply: in all cases, the pt8a2707 - 12/ 2717 - 19 will enable the external pmosfet to fully turn on to supply maximum current to the motor. there are three sub - cases to observe:
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 8 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display a) if the motor is turned on during the pre - charge state , obvi ously there is no charging current to battery. the pt8a2707 - 12/2717 - 19 will return to discharging mode while fuel - gauge is continuing to count the discharge amount. the discharging is stopped at the same criteria described in the discharging mechanism sect ion. b) if the motor is turned on during the fast - charge state, the fast - charge safety timer is held. if the motor is turned on less than 5% of the battery maximum capacity , fast - charg e resumes with fast - charge timer continu e to count (but start - up timer sta rts from beginning). however, when the motor is accumulatively turned on over 5% of the battery maximum capacity while cord is still connected, the fast - charge timer is cleared and the battery pack will be recharged from pre - charge state again once motor i s off. c) if the motor is turned on during the trickle - charge state, if the motor is turned on to accumulatively consume less than 5% (not necessarily in single operation) of the battery maximum capacity , the pt8a2707 - 12/2717 - 19 resume s trickle - charge state . however, when the motor is turned on over 5% of the battery maximum capacity during the trickle - charge state, the battery pack will be recharged from pre - charge state again after motor is off. besides, at any time when the battery pack voltage is lower th an the no - p ower value or discharging current is higher than the preset limit levels for 3sec , the motor will be stopped and the devices return to charging status. 2) the motor is turned on but draws less current than the ac/dc adapter can supply: in all cases , when the battery is not discharged , the pt8a2707 - 12/ 2717 - 19 regulates a charging current of 1/10 of the fast - charge current to battery pack. i n this case, the battery pack is under slow charging. similarly, there are three more situations to observe: a) if the motor is turned on during the pre - charge state, once motor is turned off, the pt8a 2707 - 12/ 2717 - 19 will resume back to the pre - charge state. b) if the motor is turned on during the fast - charge state, the fast - charge timer is held until motor is turned off to resume fast - charging. c) if the motor is turned on during the tri k le - charge state, once motor is turned off, the pt8a2707 - 12/ 2717 - 19 will resume back to the maintenance state. in any charging states, if the battery temperature is measured higher than 55 ? c , the motor is stopped and the 0.1c charging current is cut off. t he led/lcd still displays as in charging mode . t he motor will draw current from battery pack until the battery temperature is below 55 ? c to resume 0.1c charging current. however, no matter whether it is in fast - charging or trickle - charging modes, when the motor is turned on to consume over 5% (accumulatively, not necessarily in single operation) of the battery maximum capacity during battery is over - temperature, the battery pack will be rec harged from pre - charge state again after motor is off. 5. f uel - gauge counter 1) charge counting: charge activity is detected based on positive voltage difference (v fuel) between the pins isenfg and isencom . w hen voltage of i senfg is higher than the voltage of i sencom , the pt8a2707 - 12/ 2717 - 19 increments its fuel - gauge counter at a rate proportional to v fuel . v fuel is sampled and converted into digital data through high - precision a/d converter. w hen the fuel - gauge counter accumulates up to 99% level but none of th e full - charge criteria ( - ? v , dt/dt, safety timer, maximum battery voltage) is detected, the fuel - gauge will wait at 99% level. r ight after the battery is ful ly - charged, the pt8a2707 - 12/ 2717 - 19 displays full - charge and learns the capacity of the battery pac k such that the display will be more and more accurate in both charging and discharging cycles later. 2) discharge counting: discharge activity is detected based on a negative voltage difference (v fuel ) between the pins isenfg and isencom. w hen voltage of i s enfg is lower than the voltage of i sencom , the pt8a2707 - 12/ 2717 - 19 decrements its fuel - gauge counter at a rate proportional to v fuel . v fuel is sampled and converted into digital data through high - precision a/d converter. in case the fuel - gauge counter roll s to zero count while the battery voltage is still higher than the preset no - power level, the battery - low led is still flashing while user can still use motor. motor will be stopped when battery voltage is below the no - power level. the maximum fuel value i s not updated, but will be updated when necessary for next time the battery is fully charged. t he fuel value will be adjusted to 10% if the battery voltage gradually falls below battery - low threshold . 6. idle mode 1) standby: when cord is not connected and mot or is off, the pt8a2707 - 12/ 2717 - 19 turn to idle state to save power. some internal circuits are shut - down to keep the standby power at about 2 0 ? a. 2) b a ckground offset cancellation: when the pt8a2707 - 12/ 2717 - 19 is waked up by user, an offset cancellation is p erformed for the internal precise a/d converter before entering cord or motor modes. it normally take s 0.2~0.3s. the pt8a2707 - 1 2/ 2717 - 19 returns to idle state after use .
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 9 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 7. first - time power - up initial fuel count & first - time charging: upon power - up, the pt8a2707 - 12/2717 - 19 reset s for all internal memory and resumes all default settings, the fuel - gauge counter will be initialized as zero count. the initialization may take a few seconds before pt8a2707 - 12/2717 - 19 boots up to operate normally. for the fir st - time charging, the fuel - gauge counter counts up to a default internal maximum fuel value (which is determined by the fast - charge timer selected externally. e.g. a 90min s timer means roughly it is a 1 - hour charger, the initial maximum fuel value is assum ed for 1hr for 1c charging current. similarly, a 150min timer is assumed for a 1 2 0min s for 0.5c charging current, etc.) measured by the external current sense resistor. fuel - gauge l c d segments or leds are light up according to the initial maximum fuel valu e. the 100% fuel l c d segment (or led) keeps on flashing even though the fuel - gauge count reaches the default maximum value. in this moment, the fuel - gauge counter learns the battery capacity by continuing to roll up its counter until fast - charging is compl eted. this new battery capacity is therefore memorized and used as the maximum value for next charging cycles. similarly, if full - charge is detected earlier than the counter reaches its initial maximum fuel value, the maximum fuel value is updated but prog ressively . 8. fuel - gauge display t he pt8a2707/ 08/ 09/ 17/18/19 use lcd screen for the fuel gauge display and pt8a2710/11/ 12 use leds for fuel gauge display . f or both lcd screen and led models, t here are 3 different display modes: charging mode , discharging mo de and idle mode , as described in led/lcd pattern section in pages 12 - 13. 1) charging mode: a) cord mode with motor off : when cord is connected, the fuel gauge display is turned on to charging mode . as soon as cord is removed, the fuel - gauge led display contin ues to display the fuel gauge level according to the discharging mode for 5s. b) motor - on mode with cord: when motor is turned on while cord is plugged in, or vice versa, the pt8a2707 - 12/2717 - 19 display s fuel - gauge with accordance to the actual charge or di scharge amount. t he fuel - gauge always displays in the charging mode no matter whether there is net current charging into the battery or not. if the motor is drawing less current than the adapter can supply, the dc/dc converter will regulate the battery c harging current at a slow - rate (1/10 of the fast charge current). t he high - precision adc in pt8a2707 - 12/2717 - 19 is still to calculate this small charging current to add into the fuel - gauge counter. 2) discharging mode: a) motor - on mode without cord: when motor i s turned on while no cord is connected, the fuel gauge is displayed continuously in the discharging mode . a fter motor is turned off, the fuel - gauge display will still continue to display for 5 seconds. b) motor - on mode with cord: the fuel - gauge always disp lays in the "charging mode" no matter whether there is net current charging into the battery or not. i f the motor is drawing more current than the adapter can supply, there will be some amount of current being drawn from the battery pack. t he high - p recisio n adc in pt8a2707 - 12/ 2717 - 19 is still capable to calculate this small discharging current to subtract from the fuel - gauge counter. 3) i dle mode: led display will be off in idle state. f or lcd mod e, the display of pt8a2707/ 08/ 09 will be continued on until bat tery has no power; but the display of pt8a2717/ 18/19 will be off .
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 10 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display lcd output specification table 7 : lcd specifications pin signal format bp 64hz 50% duty cycle square - wave output signal generated from the 32khz master clock l100, l80, l60 , l40 off: in - phase with back plane signal on: 180 ? out - of - phase with back plane signal 2hz - flash: blinking at 2hz during charging mode. switch between in - phase and out - of - phase output signal at 2hz l20 off: in - phase with back plane signal on: 180 ? out - of - phase with back plane signal 2hz - flash: blinking at 2hz during charging mode. switch between in - phase and out - of - phase output signal at 2hz 1hz - flash: blinking at 1hz during discharging mode. switch between in - phase and out - of - phase output si gnal at 1hz bli off: in - phase with back plane signal on: 180 ? out - of - phase with back plane signal figure 1 : lcd s ignal p hase vs bp s ignal p hase for all states b p s i g n a l o n o f f f l a s h
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 11 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display led /lcd patterns summary figure 2 : lcd and led d isplay (100) (80) (60) (40) (20) (bli) 100 - 9 9 100 - 98 led monitor display lcd and led display indication led is off led is on led is flashing at 2 hz percentage of battery charge charge mode percentag e of battery charge discharge mode bli lcd is on, blinking at 2 hz during charging lcd is on blinking at 1 hz during discharging 20 bli 0 - 10 20 11 - 20 40 20 21 - 40 60 40 20 41 - 60 80 60 40 20 61 - 80 100 80 60 40 20 81 - 98 100 80 60 40 20 100 percentage of battery charge charge mode lcd monitor display bli 10 - 0 20 20 - 1 1 40 20 40 - 21 60 40 20 60 - 41 80 60 40 20 80 - 61 100 80 60 40 20 98 - 81 100 80 60 40 20 percentage of battery charge discharge mode bli bli bli bli bli bli (100) (80) (60) (40) (20) (bli) 99 - 100 (100) (80) (60) (40) (20) (bli) 81 - 98 (100) (80) (60) (40) (20) (bli) 61 - 80 (100) (80) (60) (40) (20) (bli) 41 - 60 (100) (80) (60) (40) (20) (bli) 21 - 40 (100) (8 0) (60) (40) (20) (bli) 11 - 20 (100) (80) (60) (40) (20) (bli) 0 - 10 (100) (80) (60) (40) (20) (bli) 60 - 41 (100) (80) (60) (40) (20) (bli) 80 - 61 (100) (80) (60) (40) (20) (bli) 40 - 21 (100) (80) (60) (40) (20) (bli) 20 - 1 1 (100) (80) (60) (40) (20) (bli) 1 0 - 0 (100) (80) (60) (40) (20) (bli) 98 - 81
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 12 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display test mode s pecification test pin = 1.65v (or short to vdd) , vdd=2.4v, isendc = 2.4v, isenfg = 2.4v, isencom = 2.4v, bp = 0v vt = 0.75v (25 o c) table 8 : for test mode input explanation output state timer vt duration for tester test charge bli l100 motor 0 62.5msec 1 0v 0.75v 62.5msec (isendc - isencom) regulate 7mv 1 1 1 0 2 0v 0.75v 62.5msec (isendc - isencom) regulate 70mv 1 1 1 0 3 0v 0.75v 62.5msec all leds turn on 0 0 0 0 4 0v 0.75v 62.5msec motor outputs 100hz 50% duty cycle 0 1 1 50% pwm @ 100hz 5 0v 0.75v 62.5msec bli turns on if ntc short or open; otherwise l100 turns on 0 1 0 0 6 0v 0.75v 62.5msec l100, bli output refer to timer setting 0 1 1 0 7 62.5msec 0 1sec for manual test 1 0v 0.75v 1sec (isendc - isenco m) regulate 7mv 1 1 1 0 2 0v 0.75v 1sec (isendc - isencom) regulate 70mv 1 1 1 0 3 0v 0.75v 1sec all leds turn on 0 0 0 0 4 0v 0.75v 1sec motor outputs 100hz 50% duty cycle 0 1 1 50% pwm @ 100hz 5 0v 0.75v 1sec bli turns on if ntc short or open; otherwi se l100 turns on 0 1 0 0 6 0v 0.75v 1sec l100, bli output refer to timer setting 0 1 1 0 7 1sec
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 13 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display maximum ratings storage temperature ................................ ................................ ................... - 40 o c to +1 25 o c supply voltage to ground potential (input & v cc only) ....................... - 0.5v to + 6. 0 v supply voltage to gro und potential (output s & d/o only) ................ - 0.5v to + 6 . 0 v dc input voltage ................................ ................................ ............................ - 0.5v to + 6 . 0 v power dissipation ................................ ................................ ................................ ......... 500mw recommended operation conditions symbol description min type max unit v cc operating voltage 1.8 3.0 5 .5 v v ih h input voltage 0.7v cc - - v v il l input voltage - - 0.3v cc v t a operating temperature - 1 0 25 70 c electrical characteristics (unless otherwise noted, ta = - 1 0~ 70 c, v cc =3.0v) symbol parameter test condition s min typ max unit v ee regulator o utput v oltage i out = 1ma 1 . 6 1 . 6 5 1 . 7 v ? ee line regulation 1 . 8 ? ? 40 50 mv ? ldr vee load regulation 0ma ? l ? 3 1 0 mv v il input low t hreshold for all digital input - - - 0.90 v v ih input high t hreshold for all digital input - 2.1 - - v i ih input leakage cur rent for slide tact and turbo pins - 20 30 100 ? il - - - - 1 i adc adc i nput c urrent (vb, vt ) - - 1 - 1 ? max fast - charge timer i nput voltage r ange 90mins - - 0 0.165 v 60mins - 0.36 - 0.46 30mins - 1.19 - 1.29 150mins - 1. 7 0 - v charge internal reference for dc - dc output current pre - charge mode and trickle charge mode (1/10cc) - 4 7 9 m v fast charge mod e (1cc) - 50 70 90 v dismax internal reference for discharging protection v vmstop = gnd - 240 - 300 - 360 v vmstop = 0.6 - 1. 0v - 280 - 350 - 420 v vmstop = v cc - 168 - 210 - 252 d motor duty cycle of motor driver output for controlling motor speed high speed - - 100% - - low speed - 7 8 % 80 % 82 % f t motor frequency for te trimming - 90 100 110 hz f motor pwm signal frequency for motor driver output - 90 100 1 4 0 hz t dly tact and dstact tact switch es delay time to active - - 125 150 ms i ol1 output sink current ( l100, l80, l60, l40, l20, bli or lmon or lturbo ) v cc =2.4v ,v ol1 =0.4v 6 8 - ma to be continued . note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other condi - tions above those indicated in the o perational sec - tions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 14 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display continu ed . symb ol parameter test condition s min typ max unit i oh2 output source current (motor) v cc =1.8v , v oh2 =1.2v - 10 - 13 ma v cc =3.0v , v oh2 =1.2v - 1 3 - 1 8 i ol2 output sink current (motor) v cc =3.0v ,v ol2 =0.3v 0.5 2.5 - ma i oh3 output source current (charge) v cc =2.4v , v oh3 =1.2v - 5 - 10 - ma v cc =3.0v , v oh2 =1.2v - 5 - 15 i ol3 output sink current (charge) v cc =3.0v , v ol3 =0.3v 2 4 - ma i oh 4 output source current ( cc pin ) v cc =3.0v , v oh 4 = 2.7 v - 1 0 - 25 - 50 ? a i ol 4 output sink current ( cc pin ) v cc =3.0v , v o l 4 =0. 3 v 0.5 0.8 2 ? a i o h5 output s ource current for bp vcc=3.0v, v oh 5 = 2.7 v 200 500 - ? a i ol5 output s ink current for bp vcc=3.0v, v o l5 = 0.3 v 200 55 0 - ? a i ccq operation c urrent vcc=3.0v - 2.6 5 ma i s standby current cord=0, motor=0 - - 30 ? a - ? v minus delta voltage to terminate fast - charge detected by vb pin (per cell) - 4 5 7 mv vb max internal reference voltage for maximum battery voltage protection - 1.95 2.00 2. 08 v vb low internal reference voltage for low battery - 1.6 1. 6 5 1.7 v vb s top internal reference voltage for no power to stop motor - 1.40 1.45 1.50 v v cord threshold voltage for cord on /off - 0.55 0.60 0.65 v f osc frequency of internal oscillator - 29 32 35 khz vt vt voltage change value for dt/dt protection ctmax= 90mins , measure 90s 13.5 15 16.5 mv ctmax= 60mins , measure 60s ctmax= 30mins , measure 30 s ctmax= 150mins , measure 150 s vt max vt voltage for maximum battery temperature 55 ? c or ntc short - 0.3 55 0.37 5 0. 395 v vt ntco vt voltage for ntc open - 1.05 1.10 1.15 v
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 15 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display application circuit 1) typical 2 - cell 1 - hr fast - charge application circuit for pt8a2707/ 17 ( s lide switch model with lcd display ) ac/dc adapter: 4v 650ma, battery capacity: 650 - 730mah, safety charge timer: 1.5hrs fig ure 3 : pt8a2707/17 lcd display slide switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f vb lo w vb r1 5 1 00 k vb vb lo w vb at vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) u1 lc d dis play charge 1 cord 2 test 3 bp 4 l1 00 5 l8 0 6 l6 0 7 l4 0 8 l2 0 9 bli 10 gnd 11 motor 12 slide 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 70 7 /2 71 7 s1 c 1 1 0 .1 u f c 1 2 0 .1 u f vb at d5 1 n58 1 7 no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 16 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 2) typical 2 - cell 1 - hr fast - charge application circuit for pt8a2708/ 18 ( ds t act switch model with lcd display ) ac/dc adapter: 4v 650ma, battery capacity: 650 - 730mah, safety charge t imer: 1.5hrs figure 4 : pt8a2708/ 18 lcd display dual - speed dstact switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f r1 5 1 00 k vb vb lo w vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) u1 lc d dis play c 1 1 0 .1 u f vb at d5 1 n58 1 7 vb lo w vb vb at s1 vmstop 24 charge 1 cord 2 test 3 bp 4 l1 00 5 l8 0 6 l6 0 7 l4 0 8 l2 0 9 bli 10 gnd 11 motor 12 dstact 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 ic 1 p t 8a2 70 8 /2 71 8 c 1 2 0 .1 u f no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 17 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 3) typical 2 - cell 1 - hr fast - charge application circuit for pt8a2709 / 19 (t act switch model with lcd display ) ac/dc adapter: 4v 650ma, battery capacity: 650 - 730mah, safety charge timer: 1.5hrs figure 5 : pt8a2709 / 19 lcd display tact switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f r1 5 1 00 k vb vb lo w vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) u1 lc d dis play c 1 1 0 .1 u f vb at d5 1 n58 1 7 vb lo w vb vb at s1 charge 1 cord 2 test 3 bp 4 l1 00 5 l8 0 6 l6 0 7 l4 0 8 l2 0 9 bli 10 gnd 11 motor 12 tact 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 70 9 /2 71 9 c 1 2 0 .1 u f no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 18 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 4) typical 2 - cell 1 - hr fast - charge application circuit for pt8a2710 ( s lide switch model with led display ) ac/dc adapter: 4v 650ma, b attery capacity: 650 - 730mah, safety charge timer: 1.5hrs figure 6 : pt8a2710 led display slide switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f vb lo w vb r1 5 1 00 k vb vb lo w vb at vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) s1 c 1 1 0 .1 u f vb at d5 1 n58 1 7 led2 8 0% led4 4 0% led5 2 0% led6 mo to r o n led1 1 00 % led3 6 0% led7 b li charge 1 cord 2 test 3 l1 00 4 l8 0 5 l6 0 6 l4 0 7 l2 0 8 lmon 9 bli 10 gnd 11 motor 12 slide 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 71 0 vdc c 1 2 0 .1 u f no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 19 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 5) typical 2 - cell 1 - h r fast - charge application circuit for pt8a2711 ( dstact switch model led display ) ac/dc adapter: 4v 6 50ma, battery capacity: 650 - 730mah, safety charge timer: 1.5hrs figure 7 : pt8a2711 led display dual - speed dstact switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f vb lo w vb r1 5 1 00 k vb vb lo w vb at vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) c 1 1 0 .1 u f vb at d5 1 n58 1 7 led2 8 0% led4 4 0% led5 2 0% led6 mo to r o n led1 1 00 % led3 6 0% led7 b li vdc charge 1 cord 2 test 3 l1 00 4 l8 0 5 l6 0 6 l4 0 7 l2 0 8 lturbo 9 bli 10 gnd 11 motor 12 dstact 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 71 1 s1 c 1 2 0 .1 u f no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 20 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 6) typical 2 - cell 1 - hr fast - charge application circuit for pt8a2712 (t act switch model with led dis play ) ac/dc adapter: 4v 650ma, battery capacity: 650 - 730mah, safety charge timer: 1.5hrs figure 8 : pt8a2712 led display tact switch application circuit ac/dc adapter 4v 650ma c1 1 00 u f dc gnd r4 2 0k r3 2 40 r6 68 q1 b 7 72 d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1a r1 2 4k r2 7 .5 k r9 0 .1 ,1 %, 1/8w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b a ttery r1 6 nt c d3 1 n41 4 8 c 1 0 1 u f q3 d8 82 1 00 k @ 2 5 a - + m1 vb at r1 3 3 3k r1 4 3 6k c9 1 u f vb lo w vb r1 5 1 00 k vb vb lo w vb at vb at vdc r5 3 30 c5 1 u f d4 1 n4 1 48 r1 7 1 00 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u fa ctu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 69 v (f o r b at te ry- low vb at=2 .1 v) s e t vb lo w =1. 45 v (f o r no- p owe r vb at=1 . 8v) c 1 1 0 .1 u f vb at d5 1 n58 1 7 led2 8 0% led4 4 0% led5 2 0% led6 mo to r o n led1 1 00 % led3 6 0% led7 b li vdc charge 1 cord 2 test 3 l1 00 4 l8 0 5 l6 0 6 l4 0 7 l2 0 8 lmon 9 bli 10 gnd 11 motor 12 tact 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 71 2 s1 c 1 2 0 .1 u f no te : c 1 1 an d c 1 2 a re u se d fo r i m pro vin g s ys te m st a bi li ty , n ot i nt e gra n t f o r who l e sy s te m
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 21 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display 7) typical 2 - cell 1 - h r 1.4a fast - charge application circuit for pt8a2711 ( dstact switch model led disp lay ) ac/dc adapter: 4 .5 v 1 5 0 0ma, battery capacity: 1 30 0 mah, safety charge timer: 1.5hrs figure 9 : pt8a2711 1.4a fast - charge application circuit ac /dc adapt er 4 .5 v 1 0 0 0m a c1 1 00 u f dc gnd r4 2 0k r3 4 30 r6 6 8o h m d1 1 n41 4 8 d2 1 n58 1 7 l1 4 7u h /1 .5 a r1 2 4k r2 7 .5 k r9 0 .0 6 8, 1 %,1 /8 w r7 3 3k r8 3 3k c2 1 u f c3 1 u f c7 1 u f r1 1 7 5k c6 1 0u f r1 2 1 80 k c8 1 u f b at tery r1 6 nt c d3 1 n40 0 7 c 1 0 1 u f 1 00 k @ 2 5 a - + m1 vb at r1 3 4 3k r1 4 2 2k c9 1 u f vb lo w vb r1 5 1 00 k vb vb lo w vb at vb at vdc r5 3 30 c5 1 u f s1 r1 8 2 20 k 1 2 j1 r1 9 4 7k vb at p u ll -u p t o vb at to en t er m an u f actu rin g te s t m o de s e t vb =2 .0 v(f o r ma x vb at=3 .4 v) s e t vb lo w =1. 6 9v (f o r b at te ry- lo w vb at=2 .1 v) s e t vb lo w =1. 4 5v (f o r no- p owe r vb at=1. 8v) led2 8 0% led4 4 0% led5 2 0% led6 dual speed led1 1 00 % led3 6 0% led7 b li charge 1 cord 2 test 3 l1 00 4 l8 0 5 l6 0 6 l4 0 7 l2 0 8 lturbo 9 bli 10 gnd 11 motor 12 dstact 13 vb 14 vblow 15 vt 16 vee 17 timer 18 vdd 19 cc 20 isencom 21 isenfg 22 isendc 23 vmstop 24 ic 1 p t 8a2 71 1 vdc q1 ao 6 4 09 r2 0 8 20 d5 1 n58 1 7 q3 ao 3 4 16 r1 0 1 0k c 1 1 0 .1 u f c 1 2 0 .1 u f
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 22 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display application instruction 1. self - discharge calibration during the idle state, the self - discharge rate of batteries is calibrated in the fuel - gauge counter . t he self - discharge calibration rate is fixed at 1/ 128 c per day , which corresponds to the nimh battery characteristics at which the battery pack will be completely self - charged to zero in about 4 months in a storage temperature of about 20 - 35 ? c . 2. setting battery temperature measurement the pt8a2707 - 12/2717 - 19 e mploy s a thermistor with negative temperature coefficient to measure the battery ? s temperature. since most thermistor s are inherent ly nonlinear with respect to temperature , in order t o reduce the effect of nonlinearity, a resistor - divider network in parallel with the thermistor is recommended. a typical application circuit is shown on the right side. the resistor - divider consists of r x and ry, which can be selected to adjust the peak temperature threshold (e.g. 5 5 ? c) as well as dt/dt slope according to the characteristics of the employed thermistors. (the calculation methods will be provided in datasheet later) f igure 10 3. setting charging current the pt8a2707 - 12/2717 - 19 emp loy s two internal references for dc/dc bulk converter to achieve constant current charging disregards to the input power supply voltages. for fast - charging , an internal reference volt age of 70mv is employed to compare with the voltage drop across the sensing resistor. for pre - charging or maintenance trickle - charging, an internal reference voltage of 7mv is employed to compare the voltage drop across the sensing resistor to achieve 1/10 of the fast - charging current. for example, when controlling a 700ma charging control, a 0.10 ? 1/8w sensing resistor is required. when it is in the pre - charging or trickle - charge status, the current is controlled at 70ma (this is already excluding the addi tional current that may flow from the adapter to lcd screen or leds or even to the motor when loaded unless motor is drawing all current from adapter). when a higher charging current would be used for 1 - hr charging for a higher capacity battery, the sensin g resistor should be scaled proportionally to maintain the same reference voltages. for examples: t able 9 : charge sensing resistor selection charging current pre - charging & maintenance current sensing resistor 70 0ma 70ma 0.10 ? , 1/8w 1.03 a 100ma 0.068 ? , 1 /8w 1. 3 a 130ma 0.054 ? , 1/8w 1.6a 160ma 0.044 ? , 1/8w basically, the sense resistor is inversely proportional to the charging current. the power dissipation is maintained at about 0.0 7 w. 4. setting dt/dt value to stop fast - charge the pt8a2707 - 12/2717 - 19 e mploy s thermistor (ntc) as battery temperature sensor. when the rate of temperature change (dt/dt) reach es certain value, fast - charge is terminated. when design external ntc sampling circuit, user should consider that appropriate dt/dt value is depended on fast charge time and battery type. table 16 shows the dt/dt value for different fast charge time. suggested ntc sampling circuit is based on this table and dt/dt characteristics of the device s . table 10 : r ate of t emperature c hange (dt/dt) to t erminate f ast - c harge fast charge time and measure time dt/dt t fcm ax = 90mins , measure 90 s 0.9 ? c/min t fcm ax = 60mins , measure 60 s 1.38 ? c/min t fcm ax = 30mins , measure 30 s 2.76 ? c/min t fcm ax = 150mins , measure 150 s 0.54 ? c/min 5. s etting motor - over - current protection threshold by setting the vmstop pin, three motor - over - current voltage threshold s can be selected as follows: table 1 1 : motor - over - current setting vmstop over - current reference voltage gnd 30 0mv across sensing resistor 0.6 - 1.0v 3 5 0mv across sensing resis tor vdd 2 1 0mv across sensing resistor ry rx ntc vt vee
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 23 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display table 1 2 : design reference for current limit charging current sensing resistor vmstop setting motor - over - current limit 70 0ma 0.10 ? , 1/8w gnd 3.0 a ( 30 0mv/0.1 ) 0.6 - 1.0v 3 .5 a (3 5 0mv/0.1) v dd 2 .1 a (2 1 0mv/0.1) 1 a 68 m ? , 1/8w gnd 4.4 a ( 30 0mv/0. 068 ) 0.6 - 1.0v 5 a (3 5 0mv/0. 068 ) vdd 3a (2 1 0mv/0. 068 ) 1. 6 a 4 4 m ? , 1/8w gnd 6.8 a ( 30 0mv/0. 044 ) 0.6 - 1.0v 8 a (3 5 0mv/0. 044 v dd 4.8 a (2 1 0mv/0. 044 )) 6. sett ing maximum battery protection and low - battery detection threshold s the ratio of ra: (rb+rc) sets the maximum battery detection and - v detection window (+/ - 0.3v). the ratio of (ra+rb): rc sets the b attery - low detection threshold. vb and vblow contain indi vidual comparators with fixed internal reference. vb internal comparator reference voltage 2.0v (v mb comparator works when vbat is above 2.4v) vblow internal comparator reference voltage 1.45v ( n o - p ower threshold) vblow internal comparator second refere nce voltage 1.65v ( b at tery - l ow threshold ) - ? v detection reference voltage range at vb = 1.5v to 2.1v figure 11 example #1: n o - p ower threshold =vbl=1.8v, maximum battery voltage=vmb=3.4v assuming rc=100k, ra and rb can be calculated as follows: rb= 3 6 k, ra=33k in this setting, - v is measured for battery voltage from 2.55v to 3.58v. (the internal adc measures - 8 mv such that at the 2 - cell battery pack the actual - v is 1 0mv (i.e. - 5 mv/cell). for the b at ttery - l ow threshold, it will be about 2.0v example #2: n o - p ower threshold =vbl=2.0v, maximum battery voltage=vmb=3.5v assuming rc=100k, ra and rb can be calculated as follows: rb= 27k, ra=48k in this setting, - v is measured for battery voltage from 2.625v to 3.675v. (the internal adc measures - 8 mv such that at the 2 - cell battery pack the actual - v is 10 mv (i.e. - 5 mv/cell). for the b at tery - l ow thres hold, it will be about 2.25v example # 3 : no - power threshold=vbl=2. 7 v (0.9v/cell) , maximum battery voltage=vmb=5 .1 v (1.7v/cell) assuming rc=100k, ra and rb can be calculated as follows: rb= 36 k, ra= 11 8k in this setting, - v is measured for battery volt age from 3.85 v to 5.35 v. (the internal adc measures - 8 mv such that at the 3 - cell battery pack the actual - v is 15 mv (i.e. - 5 mv/cell). for the bat tery - l ow threshold, it will be about 3.3 v r b r a v b v bat r c v blow ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? c b a c mb c b a c b bl r r r r v v r r r r r v v 0 . 2 45 . 1
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 24 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display mechanical information s e ( lead free soic - 24 ) denotes dimensions symbol min max a 2.35 2.65 a1 0.10 0.30 a2 2.10 2.50 b 0.33 0.51 c 0.20 0.33 d 15.20 15.60 e 7.40 7.60 e1 10.21 10.61 e l 0.40 1.27 0 8 pkg. dimensions(mm) 1.27 bsc note: 1 ) controlling dimensions in millimeters. 2 ) ref : jedec ms - 013 e/ad
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 25 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display h e ( lead free ssop - 24 ) symbol min max a 1.73 a1 0.05 0.23 a2 1.40 1.60 b 0.22 0.38 c 0.09 0.25 d 8.00 8.40 e 5.10 5.50 e1 7.60 8.00 e l 0.55 0.95 0 8 n pkg. dimensions(mm) 0.65 bsc 24 note: 1 ) ref : jedec mo - 150 b/ag 2 ) n=number of pins
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0005 pt0 268 - 1 07 / 05 /12 26 pt 8 a 2707 - 12/17 - 19 charger controller with fuel - guage & lcd/led display ordering information part no. package code package pt8a2707se * s lead free and green 24 - pin soic pt8a2708se * s lead free and green 24 - pin soic pt8a2709se * s lead free and green 24 - pin soic pt8a2710se * s lead free and green 24 - pin soic pt8a2711se * s lead free and green 24 - pin soic pt8a2712se s lead free and green 24 - pin soic pt8a2717se * s lead free and green 24 - pin soic pt8a2718se * s lead free and green 24 - pin soic pt8a2719se * s lead free and green 24 - pin soic pt8a2707he * h lead free and green 24 - pin ssop pt8a2708he * h lead free and green 24 - pin ssop pt8a2709he * h lead free and green 24 - pin ssop pt8a2710he * h lead free and green 24 - pin ssop pt8a2711he * h lead free and green 24 - pin ssop pt8a2712he h lead f ree and green 24 - pin ssop pt8a2717he * h lead free and green 24 - pin ssop PT8A2718HE * h lead free and green 24 - pin ssop pt8a2719he h lead free and green 24 - pin ssop note: ? e = pb - free and green ? adding x suffix = tape /r eel ? * contact pericom for availabilit y. pericom semiconductor corporation ? 1 - 800 - 435 - 2336 ? www.pericom.com pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. pericom does not assume any responsibility for use of any circuitry described other than the circu itry embodied in pericom product. the company makes no representations that circuitry d escribed herein is free from patent infringement or other rights, of pericom .

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