MITSUBISHI(Dig.Ana.INTERFACE) . ALY ation N nge. I ecific ct to cha M p s I l L fina ubje P R E is not a its are s M62253FP his tric lim es;T e Notic e param Som LITHIUM ION BATTERY CHARGER CONTROL IC GENERAL DESCRIPTION PIN CONFIGURATION(TOP VIEW) TIN 1 14 OUT C3 2 13 SENSE+ M62253FP 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 IC`s following functions ; • charge disabling function for an over discharged battery • charge control function by detecting the battery temperature Vref 3 VDD 4 Vcc 5 LED1 6 FEATURES 12 SENSE 11 VSENSE 10 GND LED2 7 • 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 9 C2 8 C1 Outline 14P2N-A APPLICATION Lithium ion battery charger for digital equipment BLOCK DIAGRAM Vref VDD C1 Vcc Std. VOLTAGE OE 4.1V to 3.9V OUT OUT Fixed current control circuit Incorrect detect prohibition circuit ISET OE 3.0V ISENSE+ ISENSE- SENSE+ OUT Fixed voltage control circuit VSET 2.6V SENSE- VSENSE VSENSE Incorrect detect prohibition circuit LED2 VDD Current detect circuit R1 1.64V Incorrect detect prohibition circuit LED1 TIN VDD R1 3.54V R2 C3 GND (1/5) R2 C2 MITSUBISHI(Dig.Ana.INTERFACE) . ALY ation N nge. I ecific ct to cha M p s I l L fina ubje P R E is not a its are s his tric lim es;T e Notic e param Som M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC EXPLANATION OF TERMINALS Pin No. Symbol 1 TIN Temperature detection (also using for battery connect detection) 2 C3 Setting delay time of temperature detection (Tpd=50ms at 0.1µF) 3 Vref Reference voltage of internal circuit. 4 VDD 5.0V reference voltage 5 Vcc Power supply 6,7 LED1,2 8 C1 Setting delay time of voltage detection (Tpd = 1.20sec at 2.2µF) 9 C2 Setting delay time of current detection (Tpd = 1.30sec at 2.2µF) 10 GND Function LED connection (LED1 is on during charging, LED2 is on at charge completion.) Ground 11 VSENSE Battery voltage detection 12 SENSE- Charging current detection 13 SENSE+ Charging current detection 14 OUT Output (open collector configuration) (2/5) MITSUBISHI(Dig.Ana.INTERFACE) . ALY ation N nge. I ecific ct to cha M p s I l L fina ubje P R E is not a its are s his tric lim es;T e Notic e param Som M62253FP LITHIUM ION BATTERY CHARGER CONTROL IC ABSOLUTE MAXIMUM RATING Symbol Vcc IOUT VSENSE TIN Pd Ktheata Topr Tstg Parameter OUT pin output current SENSE pin voltage TIN pin voltage Power dissipation Ta = 25°C Thermal derating Ta = 25°C Operating temperature Storage temperature Block Symbol Current detect part Voltage detect part Vcc Icc VDD VDD TIN OUT C1 C2 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 C3 tdC3 Test conditions Supply voltage ELECTRICAL CHARACTERISTICS LED (Ta=25°C unless otherwise noted) Parameter Unit 16 30 Vcc Vcc 450 4.5 -20 to +85 -40 to +125 V mA V V mW mW/°C °C °C (Vcc=8.5V,Vref=4.10V,VSENSE=3.6V,Ta=25°C, unless otherwise noted) Test condition Limit MIN LED OFF 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 voltage≤3.0V 15 Charge current set voltage 2 3.0V≤ battery voltage≤4.1V 235 Charge complete Const voltage charge time 15 detect voltage VDD pin output voltage Charge start voltage SENSE+ pin input current SENSE- pin input current Charge time Charge time 8 8 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 Resistance ratio(R1/R2) *in the block diagram OUT pin leak current Resistance ratio(R1/R2) *in the block diagram IOUT=20mA VC=15V Voltage detect delay time Recharge time@C1= 2.2µ F Connect detect time 1 4.1V output time C2= 2.2µ F Connect detect time 2 2.55V output timeC2= 2.2µ F Discharge time C2= 2.2µF C2= 2.2µF C2= 2.2µF(After current detect) Temperature detect delay time C3= 0.1µF Current detect delay time LED switching delay time MAX 15 7 5.00 2.6 3.0 4.09 4.10 2.55 3.9 25 250 25 60 60 10 10 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 (3/5) Unit V mA V V V V V V V mV mV mV µA µA mA mA V V 0.398 0.410 0.422 1.989 2.050 2.112 -1.0 TIN pin input current TIN pin up side threshold voltage 2 TIN pin low side threshold voltage 2 OUT pin saturation voltage TYP 6.0 Supply voltage range circuit current Ratings µA 0.388 0.400 0.412 1.804 1.860 1.916 1.0 0.88 1.20 0.95 1.30 88 120 0.95 1.30 1.8 2.5 30 90 36 50 2.0 V 1.0 µA 1.52 s 1.63 s 152 ms 1.65 s 3.2 s ms 64 ms MITSUBISHI(Dig.Ana.INTERFACE) . ALY ation N nge. I ecific ct to cha M p s I l L fina ubje P R E is not a its are s M62253FP his tric lim es;T e Notic e param Som LITHIUM ION BATTERY CHARGER CONTROL IC 4. Timing chart (a case of application's constants) (2) Timing of temperature detection (1) Timing of battery connecting detection 4.1V 2.55V Battery temperature Output voltage Battery connection point 50ms 0.55s ≈ Voltage Detection 55ms Current Detection 45°C 42.5°C ≈ 3°C Charge 50ms 50ms 50ms ON OFF Charge start (3) Timing of charging Battery voltage 4.1V 3.9V 3.0V 0.55S 2.6V Completion of battery temperature detection Constant current charge Constant Constant voltage current charge charge Charge completion 1.30S charge current 120mS 25mA 250mA 250mA Vo=4.1V Vo=2.3V 1.30S 25mA 0 1.20S Charge LED1 (red) LED2 (green) ON OFF ON OFF (4/5) Recharge (Constant current charge) 250mA MITSUBISHI(Dig.Ana.INTERFACE) . ALY ation N nge. I ecific ct to cha M p s I l L fina ubje P R E is not a its are s M62253FP his tric lim es;T e Notic e param Som LITHIUM ION BATTERY CHARGER CONTROL IC 5. APPLICATION EXAMPLE 2.2µF VDD C1 Vref Vcc Std voltage 5.0V 4.1V to 3.9V OE OUT OUT current control circuit Incorrect detect prohibition circuit ISET ISENSE+ ISENSE- SENSE+ OUT OE SENSE- voltage control circuit VSET 2.6V Incorrect detect prohibition circuit LED2 LED1 To VDD pin Current detect circuit Incorrect detect prohibition circuit R1 1.64V R2 VDD R1 3.54V GND C3 C2 2.2µF 0.1µF (5/5) 1Ω VSENSE VSENSE R2 10KΩ TIN Battery 3.0V