MITSUBISHI <STD-Linear ICs> M62253AGP Charge Control IC for Li-Ion Batteries General Description The M62253AGP is a charge control IC dedicated to Lithium-Ion Pin Configuration (Top view) 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. T IN 1 16 OUT C3 2 15 SENSE + VrefSW 3 14 SENSE - 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 V DD 4 13 V SENSE Vcc 5 12 GND NC 6 11 NC LED1 7 10 C2 LED2 8 9 C1 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. V DD 4.1V [4.2V] VrefSW C1 Vcc Regulated Supply 4.42V[4.53V] OE 4.0V<->3.9V [4.1V<->3.99V] OUT OUT Constant Current Control Erroneous Detection Preventing ISET 3.0V [3.07V] OE 2.6V [2.66V] VSET SENSE+ ISENSE+ ISENSE- OUT Constant Voltage Control SENSE- VSENSE VSENSE Erroneous Detection Preventing LED2 1.45V [1.49V] Erroneous Detection Preventing LED1 Current Detection TIN 3.13V [3.21V] GND C3 ( 1 / 10) C2 00-08-24 MITSUBISHI <STD-Linear ICs> M62253AGP Charge Control IC for Li-Ion Batteries 1. Pin Description Pin No. Symbol 1 TIN Temperature sensing input(also battery connecting detection input) 2 C3 Delay time setting for temperature sensing (Tpd = 49ms @ 0.1uF) 3 Function 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 V DD Reference voltage output •For 4.1V type battery <shorted VrefSW pin and VDD pin> : VDD = 4.42V. •For 4.2V type battery <when VrefSW pin is opened> : VDD = 4.53V. 5 Vcc Power supply 7, 8 LED1,2 9 10 12 C1 C2 GND 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 13 V SENSE Battery output voltage sensing input 14 SENSE- 15 16 SENSE+ Charging current sensing input (connect to higher voltage node) OUT Charging current sensing input (connect to lower voltage node) Charger output (opened collector) 2. Absolute Maximum Ratings Symbol (Ta=25deg, unless otherwise noted) Parameter Condition Ratings Unit Vcc Supply voltage 16 V IOUT Output current 30 mA Vcc V V V SENSE Applying voltage to SENSE pin VTIN Pd Ktheta Topr Tstg Applying voltage to TIN pin Power dissipation Ta = 25deg Vcc 300 Thermal debating Ta > 25deg 3.0 Operating temperature Storage temperature -20 to +85 -40 to +125 ( 2 / 10) mW mW/deg deg deg 00-08-24 MITSUBISHI <STD-Linear ICs> 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 Symbol Parameter Supply voltage Current consumption VDD output voltage V DD V DD 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 All device Vcc Icc ISET2 Charging current setting voltage 2 Current Detection LED T IN OUT C1 2.6V<battery V.<3.0V 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 5.0V<Vcc<8.0V 3.0V<battery V.<4.1V 227 250 273 mV 8.0V<Vcc<15.0V 3.0V<battery V.<4.1V 232 250 268 mV 14 25 60 60 3.03 1.35 3.06 1.45 -1.0 3.13 1.45 3.16 1.55 36 mV 85 uA 85 uA 0.4 V 0.4 V 3.23 V 1.55 V 3.26 V 1.65 V Condition LED is off during a charge at charge completion at charge completion ITHchgoff IINSENSE+ IINSENSEV OHLED1 Charge completion detecting voltage 4.0V<battery Voltage Input current into SENSE+ pin during a charge Input current into SENSE- pin LED1 pin saturation voltage during a charge V OHLED2 V THINTH1 V THINTL1 V THINTH2 V THINTL2 Iin TIN V OHOUT ILOUT td 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 td BDET1 Connect/disconnect detection time1 td BDET2 Connect/disconnect detection time2 C2 td IDET td ILED td chg C3 td C3 ILED1=10mA 4.1V con. voltage output period C2 = 2.2uF 2.55V con. voltage output period C2 = 2.2uF Delay time for current detection Delay time for LED switch over C2 = 2.2uF C2 = 2.2uF Discharging time C2=2.2uF (after current detection) Delay time for temperature detection C3 = 0.1uF ( 3 / 10) 1.0 Unit V mA V V V V V V uA mV uA V uA s 0.76 1.06 2.0 1.0 1.36 0.82 1.15 1.48 s 76 106 136 ms 0.82 1.56 30 34 1.15 2.21 90 49 1.48 2.86 s s ms ms 64 00-08-24 MITSUBISHI <STD-Linear ICs> 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 Symbol All device Vcc Icc V DD V DD V THchgon V THqchgon Voltage Vo chg1 Detection Vo chg2 V THrchgon IinVSENSE ISET1 ISET2 Output voltage setting 2 Recharge start voltage VSENSE terminal input current at charge completion Charging current setting voltage 1 2.66V<battery V.<3.07V Limits Min. Typ. Max. 5.0 15.0 7 4.30 4.53 4.76 2.56 2.66 2.76 2.97 3.07 3.17 4.17 4.20 4.23 2.51 2.61 2.71 3.89 3.99 4.09 -2.0 2.0 15 26 37 5.0V<Vcc<8.0V 3.07V<battery V.<4.2V 232 256 280 mV 8.0V<Vcc<15.0V 3.07V<battery V.<4.2V 237 256 275 mV 15 26 60 60 3.11 1.39 3.13 1.49 -1.0 3.21 1.49 3.23 1.59 Parameter Condition Supply voltage Current consumption VDD output voltage Charge start voltage Quick charge start voltage Output voltage setting 1 Charging current setting voltage 2 Current Detection LED T IN OUT C1 ITHchgoff IINSENSE+ IINSENSEV OHLED1 V OHLED2 V THINTH1 V THINTL1 V THINTH2 V THINTL2 Iin TIN V OHOUT ILOUT td C1 4.1V<battery Voltage during a charge Input current into SENSE- pin LED1 pin saturation voltage LED2 pin saturation voltage T IN pin upper threshold voltage 1 T IN pin lower threshold voltage 1 T IN pin upper threshold voltage 2 T IN pin lower threshold voltage 2 during a charge ILED2=10mA V DD =4.53V IOUT =20mA Output pin leak current V OUT =15V Delay time for voltage detection at recharge C1=2.2uF Connect/disconnect detection time2 td C3 ILED1=10mA Input current into T IN pin Output pin saturation voltage td BDET2 C3 at charge completion Input current into SENSE+ pin Connect/disconnect detection time1 td IDET td ILED td chg during a charge Charge completion detecting voltage td BDET1 C2 LED is off 4.2V con. voltage output period C2 = 2.2uF 2.61V con. voltage output period C2 = 2.2uF Delay time for current detection Delay time for LED switch over Discharging time C2 = 2.2uF C2 = 2.2uF Delay time for temperature detection C3 = 0.1uF ( 4 / 10) C2=2.2uF (after current detection) Unit V mA V V V V V V uA mV 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 1.0 0.76 1.06 2.0 V 1.0 uA 1.36 s 0.82 1.15 1.48 s 76 106 136 ms 1.15 1.48 2.21 2.86 90 49 64 s s ms ms 0.82 1.56 30 34 00-08-24 MITSUBISHI <STD-Linear ICs> 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 <STD-Linear ICs> 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 <STD-Linear ICs> M62253AGP Charge Control IC for Li-Ion Batteries 5. Flowchart for charging Insert Battery Charge inhibit charge off LED1: turned OFF LED2: turned OFF For 4.1V type battery 1.45V<V TIN <3.13V No Yes Notice: The voltage, current and time value are depend on application circuit.(Page 10) Delay CKT. for temp. detect is start to action After 49ms 1.45V<V TIN <3.16V No Yes LED1: turned ON and Const. current charge:250mA or Const. voltage charge:4.1V (during 1.15sec) Charge inhibit Const. voltage output:2.55V (during 106msec) charge off LED1: turned OFF LED2: turned OFF Const. voltage charge:4.1V less than 2.6V Check battery voltage more than 4.1V more than 25mA Const. current charge:250mA less than 25mA Check battery voltage Delay CKT. for current detect is start to action 3.0V<Vbatt<4.1V 2.6V<Vbatt<3.0V Const. current charge:25mA Check battery voltage 3.0V<Vbatt <4.1V less than 3.0V Check battery voltage more than 3.0V Check charge current less than 25mA Delay CKT. for current detect is start to action No Charge current less than 25mA (pass to 1.15sec) No more than 4.1V Const. voltage charge:4.1V more than 25mA Check charge current 2.6V<Vbatt<4.1V Yes Stop the charge (to change output voltage to 2.55V) Flowchart of temp. detect.(with hysteresis) during charge When high temp. Const. current or Const. voltage charge.(1.45V<V TIN <3.16V) Charge current less than 25mA (pass to 1.15sec) No Yes Stop the charge (to change output voltage to 2.55V) No Yes No After 49ms LED1: turned OFF, LED2: turned ON Delay CKT. for temp. detect is start to action No After 49ms V TIN <1.55V 3.13V<V TIN Yes more than 3.9V Yes Charge inhibit Check battery voltage 3.16V<V TIN Yes Delay CKT. for temp. detect is start to action Complete charge(charge OFF) passed 1.06sec V TIN <1.45V When low temp. Const. current or Const. voltage charge.(1.45V<V TIN <3.16V) Charge inhibit less than 3.9V Delay CKT. for current detect is start to action No 1.55V<V TIN No Yes No Yes Delay CKT. for temp. detect is start to action Battery voltage less than 3.9V (pass to 1.06sec) No After 49ms 1.45V<V TIN Yes Yes ( 7 / 10) V TIN <3.13V Delay CKT. for temp. detect is start to action No After 49ms V TIN <3.16V Yes 00-08-24 MITSUBISHI <STD-Linear ICs> M62253AGP Charge Control IC for Li-Ion Batteries Insert Battery Charge inhibit charge off LED1: turned OFF LED2: turned OFF For 4.2V type battery 1.49V<V TIN <3.21V No Yes Notice: The voltage, current and time value are depend on application circuit.(Page 10) Delay CKT. for temp. detect is start to action After 49ms 1.49V<V TIN <3.23V No Yes LED1: turned ON and Const. current charge:256mA or Const. voltage charge:4.2V (during 1.15sec) Charge inhibit Const. voltage output:2.61V (during 106msec) charge off LED1: turned OFF LED2: turned OFF Const. voltage charge:4.2V less than 2.66V Check battery voltage more than 4.2V more than 26mA Check charge current 2.66V<Vbatt<4.2V Const. current charge:256mA 3.07V<Vbatt<4.2V Charge current less than 26mA (pass to 1.15sec) No more than 4.2V Const. voltage charge:4.2V more than 26mA Delay CKT. for current detect is start to action 2.66V<Vbatt<3.07V Const. current charge:26mA Check battery voltage 3.07V<Vbatt <4.2V less than 26mA Check battery voltage less than 3.07V Check battery voltage more than 3.07V Check charge current Yes Stop the charge (to change output voltage to 2.61V) less than 26mA Flowchart of temp. detect.(with hysteresis) during charge Delay CKT. for current detect is start to action No When high temp. Const. current or Const. voltage charge.(1.49V<V TIN <3.23V) Charge current less than 26mA (pass to 1.15sec) No Yes Stop the charge (to change output voltage to 2.61V) No Yes No After 49ms LED1: turned OFF, LED2: turned ON Delay CKT. for temp. detect is start to action No After 49ms V TIN <1.59V 3.21V<V TIN Yes more than 3.99V Yes Charge inhibit Check battery voltage 3.23V<V TIN Yes Delay CKT. for temp. detect is start to action Complete charge(charge OFF) passed 1.06sec V TIN <1.49V When low temp. Const. current or Const. voltage charge.(1.49V<V TIN <3.23V) Charge inhibit less than 3.99V Delay CKT. for current detect is start to action No 1.59V<V TIN No Yes No Yes Delay CKT. for temp. detect is start to action Battery voltage less than 3.99V (pass to 1.06sec) No After 49ms 1.49V<V TIN Yes Yes ( 8 / 10) V TIN <3.21V Delay CKT. for temp. detect is start to action No After 49ms V TIN <3.23V Yes 00-08-24 MITSUBISHI <STD-Linear ICs> 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 (2) Battery temperature detection timing battery is connected Battery Temper. 4.1V[4.2V] Output voltage 49ms 2.55V[2.61V] 45deg 42.5deg 1.15s Voltage detection 106ms 3deg 2.5deg 49ms Charge Current detection 49ms 49ms 49ms ON OFF Charge starts (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 Constant current charging Constant voltage charging 25mA [26mA] 250mA [256mA] Vo = 4.1V [4.2V] 250mA[256mA] Completion of charging Vo = 2.55V [2.61V] Recharging Constant current charging 250mA [256mA] 1.15s Charging current 25mA[26mA] 0 1.06s Charge LED1 (Red) LED2 (Green) ON OFF ON OFF ( 9 / 10) 00-08-24 MITSUBISHI <STD-Linear ICs> 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. 2.2uF 1uF VDD VrefSW C1 Vcc Regulated Supply 4.1V[4.2V] 4.42V[4.53V] OE 4.0V<->3.9V[4.1V<->3.99V] OUT OUT Constant current control Erroneous Detection Preventing ISET OE 3.0V [3.07V] ISENSE+ ISENSE- SENSE+ OUT 2.6V [2.66V] VSET 1 Ohm SENSE- Constant voltage control VSENSE VSENSE Erroneous Detection Preventing LED2 to VDD pin 1.45V [1.49V] Erroneous Detection Preventing LED1 Current detection 3.13V [3.21V] GND C3 0.1uF Battery 10KOhm TIN 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 T IN 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