M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 gnd 2.6v [2.66v] 3.0v [3.07v] 4.0v<->3.9v [4.1v<->3.99v] 4.42v[4.53v] out vsense oe out isense+ isense- oe iset out sense- t in led1 led2 vrefsw sense+ vset 3.13v [3.21v] 1.45v [1.49v] vsense c2 c3 1 2 3 4 5 6 7 14 13 12 11 10 9 8 c3 vrefsw v dd vcc led1 led2 t in sense + sense - v sense gnd c2 c1 out general description the M62253AGP is a charge control ic dedicated to lithium-ion batteries. the constant current/voltage charging suitable for li-ion batteries are available by utilizing on-chip current/voltage control circuits. it also includes the charge inhibit function for an over discharged battery and the charge control function detecting battery temperature, enabling easy configuration of a li-ion battery charging circuit. pin configuration (top view ) package outline : 16p2e features * available for 4.1v and 4.2v battery * accurate reference voltage 4.2v 30mv *constant current and voltage charging *charging inhibit and protection function for a over discharged battery *charging inhibit and protection function for both a high and low temperature battery *recharging function *dual led indications monitoring charging states *delay circuit to prevent the erroneous detection applications li-ion battery charger for hand-held instruments such as cellular phones and notebook computers regulated supply constant current control constant voltage control the voltage value within [ ] is for 4.2v type battery. and the voltage value without [ ] is for 4.1v type battery or common value for both (4.1v and 4.2v) battery. 1 v dd c1 vcc block diagram 15 16 nc nc erroneous detection preventing erroneous detection preventing 4.1v [4.2v] current detection erroneous detection preventing
M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 1. pin description 2. absolute maximum ratings (ta=25deg, unless otherwise noted) 1 t in function temperature sensing input(also battery connecting detection input) symbol pin no. 2 c3 3 vrefsw 4 v dd 5 vcc po wer supply 7, 8 led1,2 led driver outputs ( opened collector) led1 for during charge, led2 for completion of charge c1 delay time setting for voltage sensing (tpd = 1.06s @ 2.2uf) 9 c2 delay time setting for current sensing (tpd = 1.15s @ 2.2uf) 10 gnd ground v sense battery output voltage sensing input 12 sense- charging current sensing input (connect to lower voltage node) 13 sense+ charging current sensing input (connect to higher voltage node) 14 out charger output (opened collector) vcc v 30 vcc vcc 300 3.0 ma v v mw i out v sense vt in pd topr tstg symbol parameter condition ratings unit ktheta supply voltage 16 mw/deg deg deg -20 to +85 -40 to +125 ta = 25deg ta > 25deg output current applying voltage to sense pin applying voltage to tin pin po wer dissipation thermal debating operating temperature storage temperature 2 delay time setting for temperature sensing (tpd = 49ms @ 0.1uf) 15 16 setting 4.1v type battery or 4.2v type battery for 4.1v type battery, vrefsw pin and vdd pin are shorted. for 4.2v type battery, vrefsw pin is opened. reference voltage output for 4.1v type battery : vdd = 4.42v. for 4.2v type battery : vdd = 4.53v.
M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 vcc icc led t in v thinth1 iin t in 5.0 15.0 v ma 7 3.13 v -1.0 1.0 v i set1 i set2 250 mv mv v thintl1 1.45 v v thchgon 2.6 v v thqchgon 3.0 v vo chg1 v thrchgon 3.9 out 25 i thchgoff mv 25 i insense+ i insense- v ohled1 v ohled2 vo chg2 4.10 2.55 v v i out =20ma v ohout i lout v out =15v 1.0 v dd v dd 4.42 4.20 4.64 2.7 2.5 2.9 3.1 232 3.8 14 14 4.07 2.45 268 4.0 36 36 4.13 2.65 60 85 60 85 0.4 0.4 3.03 3.23 1.35 1.55 v thinth2 3.16 v v thintl2 1.55 v 3.06 3.26 1.45 1.65 2.0 c1 c2 c3 td c1 1.36 s 1.06 0.76 td bdet1 1.48 s 1.15 0.82 td bdet2 136 ms 106 76 td idet 1.48 s 1.15 0.82 td iled 2.86 s 2.21 1.56 td chg ms 90 30 td c3 ms 49 3. electrical characteristics (vcc=12.0v, vsense=3.6v, ta=25deg, unless otherwise noted) blocks symbol parameter condition limits unit min. typ. max. all device supply voltage current consumption current detection voltage detection led is off vdd output voltage charge start voltage quick charge start voltage output voltage setting 1 output voltage setting 2 during a charge at charge completion at charge completion recharge start voltage charging current setting voltage 1 charging current setting voltage 2 5.0v M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 (vcc=12.0v, vsense=3.6v, ta=25deg, unless otherwise noted) 3-2. for 4.2v type battery 4 vcc icc led t in v thinth1 iin t in 5.0 15.0 v ma 7 3.21 v -1.0 1.0 v i set1 i set2 256 mv mv v thintl1 1.49 v v thchgon 2.66 v v thqchgon 3.07 v vo chg1 v thrchgon 3.99 out 26 i thchgoff mv 26 i insense+ i insense- v ohled1 v ohled2 vo chg2 4.20 2.61 v v i out =20ma v ohout i lout v out =15v 1.0 v dd v dd 4.53 4.30 4.76 2.76 2.56 2.97 3.17 237 3.89 15 15 4.17 2.51 275 4.09 37 37 4.23 2.71 60 85 60 85 0.4 0.4 3.11 3.31 1.39 1.59 v thinth2 3.23 v v thintl2 1.59 v 3.13 3.33 1.49 1.69 2.0 c1 c2 c3 td c1 1.36 s 1.06 0.76 td bdet1 1.48 s 1.15 0.82 td bdet2 136 ms 106 76 td idet 1.48 s 1.15 0.82 td iled 2.86 s 2.21 1.56 td chg ms 90 30 td c3 ms 49 blocks symbol parameter condition limits unit min. typ. max. all device supply voltage current consumption current detection voltage detection led is off vdd output voltage charge start voltage quick charge start voltage output voltage setting 1 output voltage setting 2 during a charge at charge completion at charge completion recharge start voltage charging current setting voltage 1 charging current setting voltage 2 5.0v M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 4. functional description (2) detection of connecting/disconnecting a battery the connecting/disconnecting of a battery is detected via the tin pin. the detection is performed by using an external resistor and thermistor supplied by the regulated 4.42v[4.53v] of the vdd pin. when the pin tin voltage is between 1.45v[1.49v] and 3.13v[3.21v], it is confirmed that a battery is connected according to the internal setting. when the tin pin voltage is less than 1.45v[1.49v] or more than 3.13v[3.21v], the charge is inhibited owing to possibilities of disconnecting a battery or unusual battery temperature. the charging start conditions (in a case a battery is connected) the charging voltage is set to 4.1v[4.2v], when the battery connection is confirmed. 1.15second (c2 = 2.2uf) later, the voltage is changed to 2.55v[2.61v] and then the detection of battery voltage will be started. (the voltage detection is not carried out until the voltage change to 2.55v[2.61v].) during the 4.1v[4.2v] constant voltage output, the voltage drop caused by the current detecting resistor is limited to 250mv[256mv]. when the battery voltage is between 2.6v[2.66v] and 4.1v[4.2v], the constant current charging starts. in the case the voltage is more than 4.1v[4.2v], the 4.1v[4.2v] constant voltage charging starts with monitoring the charging current. (3) the constant current control block and the current detection the charging current is measured between the sense+ and sense- pins, so that the constant current control is performed. the current sensing resistor drop is set as follows; in a case the battery voltage is between 2.6v[2.66v] / 3.0v[3.07v] or more than 3.0v[3.07v], it is set to 25mv[26mv] or 250mv[256mv], respectively. when the above voltage drop of less than 25mv[26mv] continues for 1.15sec(c2 =2.2uf) during the constant voltage charging, completion of the charge is confirmed and then the output changes to the constant voltage of 2.55v[2.61v]. (the preventing function of erroneous detection is worked.) (4) the constant voltage control block the battery voltage and the output voltage is measured via the vsense pin. when the battery voltage rises to 4.1[4.2v]v or more by the constant current charging, the 4.1v[4.2v] constant voltage control starts alternatively. when the above voltage drop of less than 25mv[26mv] continues for 1.15sec(c2 = 2.2uf) during the constant voltage charging, completion of the charge is confirmed and then the output changes to the constant voltage of 2.55v[2.61v]. (the preventing function of erroneous detection is worked.) notice: the voltage value within [ ] is for 4.2v type battery. and the voltage value without [ ] is for 4.1v type battery or common value for both (4.1v and 4.2v) battery. 5 (1) setting 4.1v type or 4.2v type battery if using 4.1v type battery, make vrefsw pin and vdd pin short. in this case, 4.1v constant charging is performed because internal referential voltage is set at 4.1v. if using 4.2v type battery, make vrefsw pin open. in this case, 4.2v constant charging is performed because internal referential voltage is set at 4.2v. the resistance divider between vdd and gnd sets internal referential voltage. changing vdd voltage by switching vdd pin shorted to vrefsw pin or opened sets referential voltage for constant charge 4.1v or 4.2v.
M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 (6) the temperature detecting block temperature detection is done through the tin pin. detecting battery temperature is accomplished by utilizing an external resistor and thermistor supplied by the regulated 4.42v[4.53v] of the vdd pin. when the tin voltage is between 1.45v[1.49v] and 3.13v[3.21v], the measured temperature is regarded as normal according to the internal setting, and then the charging will start. when the voltage of the tin pin is less than 1.45v[1.49v] or more than 3.13v[3 .21v], the charging is inhibited due to the decision of the unusual battery temperature. in a case the tin voltage is down to below 1.45v[1.49v] after the charging have started, the charging is stopped until the tin voltage rises to 1.55v[1.59v] or more. (it has hysteresis corresponding to battery temperature range of 2.5deg.) the temperature detection is completed after a sensing voltage is halted for 49ms(c3 =0.1uf). (the preventing function of erroneous detection is worked.) (7) the regulated power supply block for 4.1v type battery ( shorted vrefsw pin and vdd pin ), regulated 4.42v is provided via the vdd pin.for 4.2v type battery ( vrefsw pin is opened ), regulated 4.53v is provided via the vdd pin. this regulated voltage is used for detecting battery temperature with the external resistance and thermistor. (8) the output block an external pnp transistor should be connected to the out pin because of an opened collector output circuit configuration. the maximum output current is 30ma, which will be multiplied by hfe of an external transistor, thus enabling the high current charging. (9) the led driving block the output configuration of this block is the opened collector by npn tr. the charging states are indicated by using two leds. led1 or led2 is on during the charge or at the completion of the charge, respectively. where "on" is lighting a led. the led indication changes from "the charge" to "the completion of the charge" after 2.21sec (c2 =2.2uf) form the time when the completion is confirmed by monitoring the charging current. (5) the voltage detection block in a case the battery voltage monitoring via the vsense pin is less than 2.6v[2.66v], the charge is inhibited because of the following two reasons; a battery is over discharged or a shorted battery is connected. in a case the battery voltage is more than 2.6v[2.66v], the following two charging current values are set according to the battery outputs; the output is between 2.6v[2.66v] and 3.0v[3.07v], resulting in the current measuring resistor drop of 25mv[26mv], the output is more than 3.0v[3.07v], resulting in that of 250mv[256mv]. the battery voltage rises to 4.1v[4.2v] during the constant current charging, which changes the constant current charging to the constant voltage one. when it continues for 1.06sec(c1 =2.2uf) that the battery voltage is less than 3.9v[3..99v] after the completion of charging, the recharging will start. (the preventing function of erroneous detection is worked.) 6
M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 yes no yes no 1.45v M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 yes no yes no 1.49v M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 1.15s 4.1v[4.2v] 2.55v[2.61v] on off 49ms 49ms 106ms 2.6v[2.66v] 4.1v[4.2v] 3.9v[3.99v] 3.0v[3.07v] led2 (green) led1 (red) 25ma [26ma] 250ma [256ma] vo = 4.1v [4.2v] vo = 2.55v [2.61v] on off on off 250ma [256ma] 25ma[26ma] 250ma[256ma] 0 (1) battery connecting/disconnecting detection timing (2) battery temperature detection timing battery is connected output voltage voltage detection current detection charge starts battery temper. 45deg 42.5deg 3deg charge (3) timing diagram during a charge battery voltage completion of detecting the battery temper. 1.15s 106ms 1.06s constant current charging constant current charging constant voltage charging completion of charging recharging constant current charging 1.15s 1.06s charging current charge 6. functional timing diagram (the component values are the same as those of the application circuits) notice: the voltage value within [ ] is for 4.2v type battery. and the voltage value without [ ] is for 4.1v type battery or common value for both (4.1v and 4.2v) battery. 2.5deg 9 49ms 49ms 49ms
M62253AGP mitsubishi ( / 10) charge control ic for li-ion batteries 00-08-24 vsense 3.13v [3.21v] 1.45v [1.49v] 10kohm 2.6v [2.66v] 3.0v [3.07v] 4.0v<->3.9v[4.1v<->3.99v] out vsense oe out isense+ isense- oe iset vcc out sense- tin gnd led1 led2 vrefsw sense+ vset c1 c2 c3 vdd 2.2uf 0.1uf 7. the application circuit 2.2uf to v dd pin battery 1 ohm constant voltage control constant current control note : the following thermistor is recommended. maker : ishizuka denshi type :103ht characteristic :10kohm at 25deg erroneous detection preventing erroneous detection preventing in a case of charging a battery without a thermistor, a mechanical switch should be connected to the t in pin so that the voltage between 1.45v[1.49v] and 3.13v[3.21v] w ill be supplied to the pin. 1uf 10 notice: the voltage value within [ ] is for 4.2v type battery. and the voltage value without [ ] is for 4.1v type battery or common value for both (4.1v and 4.2v) battery. the above circuit is shown in a case of 4.1v type battery. when using 4.2v type battery, make vrefsw pin open. erroneous detection preventing 4.1v[4.2v] thermistor current detection 4.42v[4.53v] regulated supply
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