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| his tric lim es;T e Notic e param Som LY n I N Aspecificattioo .change. L I M final ubjec t P R E is not a its are s MITSUBISHI(Dig.Ana.INTERFACE) M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC GENERAL DESCRIPTION The M62253FP is a charge controller designed for charging lithium ion batteries. The IC has a current and voltage control circuit allowing the constant current/voltage charging to lithium ion batteries. A charger system for lithium ion batteries can be easily designed by utilizing the ICs following functions ; * charge disabling function for an over discharged battery * charge control function by detecting the battery temperature PIN CONFIGURATION(TOP VIEW) TIN 1 Vref 3 VDD 4 Vcc 5 LED1 6 LED2 7 14 OUT M62253FP C3 2 13 SENSE+ 12 SENSE 11 VSENSE 10 GND 9 8 C2 C1 FEATURES * Constant current and voltage charging * Charge disabling functions for an over discharged battery and a high/low temperature battery * Recharging function * 2 LED driving circuits to Indicate charging conditions * Delay circuit to prevent chattering Outline 14P2N-A APPLICATION Lithium ion battery charger for digital equipment BLOCK DIAGRAM Vref VDD Std. VOLTAGE C1 Vcc 4.1V to 3.9V Incorrect detect prohibition circuit OE OUT Fixed current control circuit ISET ISENSE+ ISENSE- OUT SENSE+ 3.0V OE OUT Fixed voltage control circuit VSET VSENSE SENSEVSENSE 2.6V LED2 LED1 Incorrect detect prohibition circuit Incorrect detect prohibition circuit Current detect circuit 1.64V VDD R1 R2 TIN VDD R1 3.54V R2 GND (1/5) C3 C2 his tric lim es;T e Notic e param Som LY n I N Aspecificattioo .change. L I M final ubjec t P R E is not a its are s MITSUBISHI(Dig.Ana.INTERFACE) M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC EXPLANATION OF TERMINALS Pin No. 1 2 3 4 5 6,7 8 9 10 11 12 13 14 Symbol TIN C3 Vref VDD Vcc LED1,2 C1 C2 GND Function Temperature detection (also using for battery connect detection) Setting delay time of temperature detection (Tpd=50ms at 0.1F) Reference voltage of internal circuit. 5.0V reference voltage Power supply LED connection (LED1 is on during charging, LED2 is on at charge completion.) Setting delay time of voltage detection (Tpd = 1.20sec at 2.2F) Setting delay time of current detection (Tpd = 1.30sec at 2.2F) Ground VSENSE Battery voltage detection SENSESENSE+ Charging current detection Charging current detection Output (open collector configuration) OUT (2/5) his tric lim es;T e Notic e param Som LY n I N Aspecificattioo .change. L I M final ubjec t P R E is not a its are s ABSOLUTE MAXIMUM RATING Symbol Vcc IOUT VSENSE TIN Pd Ktheata Topr Tstg Parameter Supply voltage OUT pin output current MITSUBISHI(Dig.Ana.INTERFACE) M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC (Ta=25C unless otherwise noted) Test conditions Ratings 16 30 Vcc Vcc 450 4.5 -20 to +85 -40 to +125 Unit V mA V V mW mW/C C C SENSE pin voltage TIN pin voltage Power dissipation Ta = 25C Thermal derating Ta = 25C Operating temperature Storage temperature ELECTRICAL CHARACTERISTICS Block (Vcc=8.5V,Vref=4.10V,VSENSE=3.6V,Ta=25C, unless otherwise noted) Symbol Parameter Supply voltage range Test condition LED OFF Limit MIN TYP MAX Unit V mA V V V V V V V mV mV mV A A mA mA V V Vcc Icc VDD VDD VTHchgon VTHqchgon VTHqchgoff Vochg1 Vochg2 VTHrchgon ISET1 ISET2 ITHchgoff IINSENSE+ IINSENSEIoutLED1 IoutLED2 VOHLED1 VOHLED2 VTHINTH1 VTHINTL1 IinTIN VTHINTH2 VTHINTL2 VOHOUT ILOUT tdC1 tdBDET1 tdBDET2 tdIDET tdILED tdchg Voltage detect part 6.0 7 5.00 2.6 3.0 4.09 4.10 2.55 3.9 25 250 25 60 60 10 10 15 5.25 2.7 3.1 4.12 4.13 2.65 4.0 35 265 35 85 85 12 12 2.5 2.5 circuit current VDD pin output voltage Current detect part 4.75 2.5 Fast charge start voltage 2.9 Const current charge 4.06 stop voltage Output voltage set1 Charge time 4.07 Output voltage set2 Charge complete time 2.45 Recharge start voltage Charge complete time 3.8 Charge current set voltage 1 2.6V battery voltage3.0V 15 Charge current set voltage 2 3.0V battery voltage4.1V 235 Charge complete Const voltage charge time 15 detect voltage Charge start voltage SENSE+ pin input current SENSE- pin input current LED1 pin output current LED2 pin output current LED1 pin output "H" voltage LED2 pin output "H" voltage TIN pin up side threshold voltage 1 TIN pin low side threshold voltage 1 Charge time Charge time LED 8 8 Resistance ratio(R1/R2) *in the block diagram 0.398 0.410 0.422 1.989 2.050 2.112 TIN TIN pin input current TIN pin up side threshold voltage 2 TIN pin low side threshold voltage 2 OUT pin saturation voltage -1.0 Resistance ratio(R1/R2) *in the block diagram A 1.0 2.0 V 1.0 A 1.52 s 1.63 s 152 ms 1.65 s 3.2 s ms 64 ms 0.388 0.400 0.412 1.804 1.860 1.916 OUT C1 OUT pin leak current IOUT=20mA VC=15V Voltage detect delay time Recharge time@C1= 2.2 F Connect detect time 1 4.1V output time C2= 2.2 F Connect detect time 2 2.55V output timeC2= 2.2 F Current detect delay time LED switching delay time C2 Discharge time Temperature detect delay time C2= 2.2F C2= 2.2F C2= 2.2F(After current detect) C3= 0.1F (3/5) C3 tdC3 0.88 1.20 0.95 1.30 88 120 0.95 1.30 1.8 2.5 30 90 36 50 his tric lim es;T e Notic e param Som LY n I N Aspecificattioo .change. L I M final ubjec t P R E is not a its are s MITSUBISHI(Dig.Ana.INTERFACE) M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC 4. Timing chart (a case of application's constants) (1) Timing of battery connecting detection Battery connection point Output voltage 4.1V 2.55V (2) Timing of temperature detection 50ms Battery temperature 45C 42.5C 0.55s 3C 50ms 50ms 50ms Voltage Detection Current Detection 55ms Charge Charge start ON OFF (3) Timing of charging Battery voltage 4.1V 3.9V 3.0V 2.6V Constant current charge Constant Constant voltage current charge charge 1.30S 120mS 0.55S Completion of battery temperature detection Charge completion Recharge (Constant current charge) 25mA 250mA Vo=4.1V Vo=2.3V 250mA charge current 250mA 1.30S 25mA 0 1.20S Charge LED1 (red) LED2 (green) ON OFF ON OFF (4/5) his tric lim es;T e Notic e param Som LY n I N Aspecificattioo .change. L I M final ubjec t P R E is not a its are s MITSUBISHI(Dig.Ana.INTERFACE) M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC 5. APPLICATION EXAMPLE 2.2F VDD C1 Vref Std voltage Vcc 5.0V 4.1V to 3.9V Incorrect detect prohibition circuit OE OUT ISENSE+ ISENSE- OUT current control circuit ISET SENSE+ OE OUT 3.0V voltage control circuit VSET VSENSE SENSEVSENSE To VDD pin 1 2.6V LED2 LED1 Incorrect detect prohibition circuit Incorrect detect prohibition circuit Current detect circuit R1 1.64V R2 10K VDD R1 3.54V R2 TIN GND C3 0.1F C2 2.2F (5/5) Battery |
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