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| MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 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) T IN 1 16 OUT 15 SENSE + 14 SENSE 13 V SENSE 12 GND 11 NC 10 C2 9 C1 C3 2 VrefSW 3 V DD 4 Vcc NC 5 6 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 LED1 7 LED2 8 Package Outline : 16P2E Applications Li-Ion Battery Charger for hand-held instruments such as cellular phones and notebook computers Block Diagram 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. VDD 4.1V [4.2V] VrefSW C1 Vcc Regulated Supply 4.42V[4.53V] 4.0V<->3.9V [4.1V<->3.99V] OE OUT Erroneous Detection Preventing Constant Current Control ISET OUT SENSE+ ISENSE+ ISENSE- 3.0V [3.07V] 2.6V [2.66V] OE OUT Constant Voltage Control VSET VSENSE SENSE- VSENSE LED2 LED1 Erroneous Detection Preventing Erroneous Detection Preventing Current Detection 1.45V [1.49V] TIN 3.13V [3.21V] GND ( 1 / 10) C3 C2 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 1. Pin Description Pin No. 1 2 3 Symbol TIN C3 Function Temperature sensing input(also battery connecting detection input) Delay time setting for temperature sensing (Tpd = 49ms @ 0.1uF) Setting 4.1V type battery or 4.2V type battery VrefSW *For 4.1V type battery, VrefSW pin and VDD pin are shorted. *For 4.2V type battery, VrefSW pin is opened. 4 5 7, 8 9 10 12 13 14 15 16 VDD Vcc LED1,2 C1 C2 GND SENSE- Reference voltage output *For 4.1V type battery LED driver outputs (opened collector) LED1 for during charge, LED2 for completion of charge Delay time setting for voltage sensing (Tpd = 1.06s @ 2.2uF) Delay time setting for current sensing (Tpd = 1.15s @ 2.2uF) Ground Charging current sensing input (connect to lower voltage node) Charger output (opened collector) VSENSE Battery output voltage sensing input SENSE+ Charging current sensing input (connect to higher voltage node) OUT 2. Absolute Maximum Ratings Symbol Vcc Parameter Supply voltage (Ta=25deg, unless otherwise noted) Condition Ratings 16 30 Vcc Ta = 25deg Ta > 25deg Vcc 300 3.0 -20 to +85 -40 to +125 Unit V mA V V mW mW/deg deg deg Output current IOUT VSENSE Applying voltage to SENSE pin VTIN P d Ktheta Topr Tstg Applying voltage to TIN pin Power dissipation Thermal debating Operating temperature Storage temperature ( 2 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 3. Electrical Characteristics 3-1. For 4.1V type battery (shorted Vref SW pin and VDD pin) (Vcc=12.0V, VSENSE=3.6V, Ta=25deg, unless otherwise noted) Blocks All device Symbol Vcc Icc Parameter Condition Limits Min. Typ. Max. 5.0 15.0 7 4.20 4.42 4.64 2.5 2.6 2.7 2.9 3.0 3.1 4.07 4.10 4.13 2.45 2.55 2.65 3.8 3.9 4.0 -2.0 2.0 14 25 36 227 232 14 250 250 25 60 60 273 268 Unit V mA V V V V V V uA mV mV mV Supply voltage Current consumption VDD output voltage VDD VDD V THchgon Charge start voltage V THqchgon Quick charge start voltage Voltage Vo chg1 Output voltage setting 1 Detection Vo chg2 Output voltage setting 2 V THrchgon Recharge start voltage IinVSENSE VSENSE terminal input current Charging current setting voltage 1 ISET1 ISET2 Current Detection ITHchgoff IINSENSE+ IINSENSEV OHLED1 V OHLED2 V THINTH1 V THINTL1 V THINTH2 V THINTL2 Iin TIN V OHOUT ILOUT td C1 td BDET1 td BDET2 C2 td IDET td ILED td chg td C3 Charge completion detecting voltage Charging current setting voltage 2 LED is off during a charge at charge completion at charge completion 2.6V LED T IN OUT C1 LED2 pin saturation voltage ILED2=10mA T IN pin upper threshold voltage 1 T IN pin lower threshold voltage 1 V DD=4.42V T IN pin upper threshold voltage 2 T IN pin lower threshold voltage 2 Input current into T IN pin Output pin saturation voltage IOUT=20mA Output pin leak current V OUT =15V Delay time for voltage detection at recharge C1=2.2uF Connect/disconnect detection time1 Connect/disconnect detection time2 4.1V con. voltage output period C2 = 2.2uF 2.55V con. voltage output period C2 = 2.2uF 3.03 1.35 3.06 1.45 -1.0 3.13 1.45 3.16 1.55 1.0 36 mV 85 uA 85 uA 0.4 V 0.4 V 3.23 V 1.55 V 3.26 V 1.65 V 2.0 1.0 1.36 1.48 136 1.48 2.86 64 uA V uA s s ms s s ms ms 0.76 0.82 76 0.82 1.56 30 34 1.06 1.15 106 1.15 2.21 90 49 Delay time for current detection Delay time for LED switch over Discharging time Delay time for temperature detection C2 = 2.2uF C2 = 2.2uF C2=2.2uF (after current detection) C3 C3 = 0.1uF ( 3 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 3-2. For 4.2V type battery (Vcc=12.0V, VSENSE=3.6V, Ta=25deg, unless otherwise noted) Blocks All device Symbol Vcc Icc Parameter Supply voltage Current consumption VDD output voltage Charge start voltage Quick charge start voltage Output voltage setting 1 Output voltage setting 2 Recharge start voltage VSENSE terminal input current Charging current setting voltage 1 Condition LED is off VDD VDD V THchgon V THqchgon Voltage Vo chg1 Detection Vo chg2 V THrchgon IinVSENSE ISET1 ISET2 Current Detection ITHchgoff IINSENSE+ IINSENSEV OHLED1 V OHLED2 V THINTH1 V THINTL1 V THINTH2 V THINTL2 Iin TIN V OHOUT ILOUT td C1 td BDET1 td BDET2 C2 td IDET td ILED td chg td C3 during a charge at charge completion at charge completion 2.66V Unit V mA V V V V V V uA mV mV mV Charging current setting voltage 2 Charge completion detecting voltage 4.1V LED T IN V DD=4.53V 3.11 1.39 3.13 1.49 -1.0 3.21 1.49 3.23 1.59 1.0 37 mV 85 uA 85 uA 0.4 V 0.4 V 3.31 V 1.59 V 3.33 V 1.69 V uA OUT C1 IOUT=20mA Output pin leak current V OUT =15V Delay time for voltage detection at recharge C1=2.2uF Connect/disconnect detection time1 Connect/disconnect detection time2 4.2V con. voltage output period C2 = 2.2uF 2.61V con. voltage output period C2 = 2.2uF 0.76 0.82 76 0.82 1.56 30 34 1.06 1.15 106 2.0 V 1.0 uA 1.36 s 1.48 136 s ms s s ms ms Delay time for current detection Delay time for LED switch over Discharging time Delay time for temperature detection C2 = 2.2uF C2 = 2.2uF C2=2.2uF (after current detection) C3 C3 = 0.1uF 1.15 1.48 2.21 2.86 90 49 64 ( 4 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 4. Functional Description Notice: The voltage value within [ ] is for 4.2V type battery. And the voltage value w ithout [ ] is for 4.1V type battery or common value for both (4.1V and 4.2V) battery. (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. (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.) ( 5 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries (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) 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. ( 6 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 5. Flowchart for charging Charge inhibit charge off LED1: turned OFF LED2: turned OFF Insert Battery 1.45V Delay CKT. for temp. detect is start to action After 49ms For 4.1V type battery Notice: The voltage, current and time value are depend on application circuit.(Page 10) No 1.45V LED1: turned ON and Const. current charge:250mA or Const. voltage charge:4.1V (during 1.15sec) Charge inhibit charge off LED1: turned OFF LED2: turned OFF Const. voltage output:2.55V (during 106msec) Const. voltage charge:4.1V less than 2.6V Check battery voltage more than 4.1V more than 25mA Check charge current less than 25mA Const. current charge:250mA 3.0V 2.6V Charge current less than 25mA (pass to 1.15sec) 3.0V more than 4.1V No Check battery voltage more than 3.0V Const. voltage charge:4.1V less than 3.0V more than 25mA Check charge current less than 25mA Yes Stop the charge (to change output voltage to 2.55V) Delay CKT. for current detect is start to action Charge current less than 25mA (pass to 1.15sec) Flowchart of temp. detect.(with hysteresis) during charge When high temp. Const. current or Const. voltage charge.(1.45V Const. current or Const. voltage charge.(1.45V No Yes Stop the charge (to change output voltage to 2.55V) Complete charge(charge OFF) passed 1.06sec LED1: turned OFF, LED2: turned ON No VTIN<1.45V Yes No 3.16V Delay CKT. for temp. detect is start to action After 49ms No Delay CKT. for temp. detect is start to action After 49ms VTIN<1.55V Yes 3.13V more than 3.9V Check battery voltage less than 3.9V No Charge inhibit Charge inhibit Delay CKT. for current detect is start to action Battery voltage less than 3.9V (pass to 1.06sec) 1.55V No VTIN<3.13V Yes No Delay CKT. for temp. detect is start to action No After 49ms No Delay CKT. for temp. detect is start to action After 49ms Yes 1.45V VTIN<3.16V Yes ( 7 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries Insert Battery Charge inhibit charge off LED1: turned OFF LED2: turned OFF 1.49V Delay CKT. for temp. detect is start to action After 49ms For 4.2V type battery Notice: The voltage, current and time value are depend on application circuit.(Page 10) No 1.49V LED1: turned ON and Const. current charge:256mA or Const. voltage charge:4.2V (during 1.15sec) Charge inhibit charge off LED1: turned OFF LED2: turned OFF Const. voltage output:2.61V (during 106msec) Const. voltage charge:4.2V less than 2.66V Check battery voltage more than 4.2V more than 26mA 2.66V less than 26mA Check battery voltage Delay CKT. for current detect is start to action Charge current less than 26mA (pass to 1.15sec) 3.07V more than 4.2V 2.66V more than 3.07V Const. voltage charge:4.2V less than 3.07V more than 26mA Check charge current less than 26mA Yes Stop the charge (to change output voltage to 2.61V) Delay CKT. for current detect is start to action Charge current less than 26mA (pass to 1.15sec) Flowchart of temp. detect.(with hysteresis) during charge When high temp. Const. current or Const. voltage charge.(1.49V Const. current or Const. voltage charge.(1.49V No Yes Stop the charge (to change output voltage to 2.61V) Complete charge(charge OFF) passed 1.06sec LED1: turned OFF, LED2: turned ON No VTIN<1.49V Yes No 3.23V Delay CKT. for temp. detect is start to action After 49ms No Delay CKT. for temp. detect is start to action After 49ms VTIN<1.59V Yes 3.21V more than 3.99V Check battery voltage less than 3.99V No Charge inhibit Charge inhibit Delay CKT. for current detect is start to action Battery voltage less than 3.99V (pass to 1.06sec) 1.59V No VTIN<3.21V Yes No Delay CKT. for temp. detect is start to action No After 49ms No Delay CKT. for temp. detect is start to action After 49ms Yes 1.49V VTIN<3.23V Yes ( 8 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 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 w ithout [ ] is for 4.1V type battery or common value for both (4.1V and 4.2V) battery. (1) Battery connecting/disconnecting detection timing battery is connected 4.1V[4.2V] (2) Battery temperature detection timing Output voltage 2.55V[2.61V] Battery Temper. 49ms 1.15s 45deg 42.5deg 3deg 2.5deg 49ms 49ms 49ms 49ms Voltage detection 106ms Current detection Charge starts Charge ON OFF (3) Timing diagram during a charge 4.1V[4.2V] Battery voltage 3.9V[3.99V] 3.0V[3.07V] 1.06s 2.6V[2.66V] Completion of detecting the battery temper. 1.15s 106ms Constant current charging 25mA [26mA] Constant current charging 250mA [256mA] Constant voltage charging Vo = 4.1V [4.2V] Completion of charging Vo = 2.55V [2.61V] 1.15s Recharging Constant current charging 250mA [256mA] 250mA[256mA] Charging current 25mA[26mA] 0 1.06s Charge LED1 (Red) LED2 (Green) ON OFF ON OFF ( 9 / 10) 00-08-24 MITSUBISHI M62253AGP Charge Control IC for Li-Ion Batteries 7. The Application Circuit 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. 1uF 2.2uF VDD 4.1V[4.2V] VrefSW C1 Vcc OUT SENSE+ SENSE1 Ohm Regulated Supply 4.42V[4.53V] 4.0V<->3.9V[4.1V<->3.99V] OE OUT Erroneous Detection Preventing Constant current control ISET ISENSE+ ISENSE- 3.0V [3.07V] 2.6V [2.66V] OE OUT Constant voltage control VSET VSENSE VSENSE Erroneous Detection Preventing Erroneous Detection Preventing Current detection 1.45V [1.49V] LED2 LED1 to VDD pin 10KOhm Battery 3.13V [3.21V] TIN GND C3 0.1uF C2 2.2uF thermistor Note : The following thermistor is recommended. Maker : ISHIZUKA DENSHI Type :103HT Characteristic :10kOhm at 25deg The above circuit is shown in a case of 4.1V type battery. When using 4.2V type battery, make VrefSW pin open. In a case of charging a battery without a thermistor, a mechanical switch should be connected to the TIN pin so that the voltage between 1.45V[1.49V] and 3.13V[3.21V] w ill be supplied to the pin. (10 / 10) 00-08-24 |
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