Lithium-Ion Secondary Battery Charge Control IC for C Charger Monolithic IC MM3324 Outline This charge control IC has characteristics to monitor battery temperature to control the charge and charge, and it is in compliance with the Safety Standard that will be put in force in 2011. In addition, this IC has achieved high cost performance in that it has integrated with charge FET and sensing resistor, which are the external devices in the conventional charge control ICs, and that the reverse protection function is added. Features 1. Integrated battery temperature monitor and battery control functions in advance preparation for the Safety Standard slated to be effective in 2011. Safety of the battery is secured by changing the full charge and charge when the battery temperature is low and high. 2. Can reduce parts and its installation costs thanks to the integrated charging FET and sensing resistor. 3. Because of the control function integrated in the primary side, it is also possible to charge the battery highly efficiently by tracking the battery in addition to the charge control. Furthermore, the heat dissipation is minimized. Package TSOP-16D pplications C Charger
Block Diagram TDET 1.3 reference Regulator 2.5 reference Battery temperature control constant control constant control Reverse Charge control control Current PROG CNT over under precharge LED display logic full charging recharge constant control CE Chip enable control daptor over under Thermal shutdown Oscillator Timer TP1 TP2 TP3 CFB2 CFB1 Pin ssignment CE TDET NC 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 CFB1 CFB2 TP1 CNT TP2 PROG TP3 1 CFB1 9 2 CFB2 10 NC 3 TP1 11 4 CNT 12 TDET 5 TP2 13 6 PROG 14 CE 7 TP3 15 8 16 TSOP-16D (TOP IEW)
Pin Description Pin no. pin name I/O Function Internal equivalent circuit 1 CFB1 Input Rated control phase compensation pin. Oscillation is improved by connecting an external capacitor between CFB1 and CNT for phase compensation. CFB1 2 CFB2 Input Rated control phase compensation pin. Oscillation is improved by connecting an external capacitor between CFB2 and CNT for phase compensation. CFB2 3 TP1 Input Terminal 1 for test It is a terminal for the timer test. Please connect it with the opening when you use it usually. TP1 4 CNT Output Photo diode drive pin of photo coupler for and constant and constant control. Connect to cathode of diode. CNT 5 TP2 Input Terminal 2 for test It is a terminal for the timer test. Please connect it with the opening when you use it usually. 6 PROG Input It can adjust the charge for DC input() with the value of an external resistor. If setting this value smaller, the charge can be larger. TP2 PROG 7 TP3 Input Terminal 3 for test It is a terminal for the timer test. Please connect it with the opening when you use it usually. TP3
Pin no. pin name I/O Function Internal equivalent circuit 8 Input Battery output pin. Detect battery and control charging. 9 Input Power supply input pin. 10 NC NC 11 Input Ground pin. 12 TDET Input Temperature input pin. pply potential resistance divided by external resistor and thermistor from reference when using. Reset state will exist if TDET pin does not reach the specified potential. TDET 13 Output Reference power supply output pin. Outputs about 2.5olts typ. reference. Used for temperature reference power supply. 14 CE Input Chip enable pin. (active High) CE 15 Output output pin. NMOS-Tr open drain output. 16 Output output pin. NMOS-Tr open drain output.
bsolute Maximum Ratings (Except where noted otherwise Ta=25 C) Item Symbol Ratings Units Storage temperature TSTG 55~+150 C Operating temperature TOPR 40~+85 C Power dissipation Supply MX 0.3~+6 IC unit Pd1 0.3 Substrate mounting ( 1) Pd2 0.8 1 Boardsize : 50 50 1mm Material : Paper phenolic Layer : Single side Wire rate : 70% W Recommended Operating Conditions Item Symbol Ratings Units Operating temperature TOPR 40~+75 C Supply OPR 2.7~5.9 Electrical Characteristics (Except where noted otherwise Ta=-0~45 C, CC=5) Item Symbol Measurement Conditions Min. Typ. Max. Unit. Consumption IDD 1 2 m Reference 2.5 L L =H L 2.35 2.45 2.55 L hysteresis width ( 1) LW 50 100 150 m H H =L H 5.50 5.70 5.90 H hysteresis width ( 1) HW 50 100 150 m control 4.4 4.5 4.6 pin leakage I 4 µ pin output (1 2) 1 T2 TDET T5 4.170 4.200 4.230 2 T5 TDET T6 4.000 4.050 4.100 Pre-charge range IPRECHG L P IPRECHG=KP (PRECHG/RPROG) 30 85 m Fast charge range IFSTCHG1 IFSTCHG2 P, T2 TDET T3 IFSTCHG1=KP (FSTCHG1/RPROG) P,T3 TDET T6 IFSTCHG2=KP (FSTCHG2/RPROG) 225 640 300 850 m Pre-charge PROG pin output PRECHG L P 0.20 Fast charge PROG output FSTCHG1 P,T2 TDET T3 1.50 FSTCHG2 P,T3 TDET T6 2.00 Charge Current set coefficient KP KP 500 Full charge PROG output DETFULL 0.2 te : 1 guaranteed by design
Item Symbol Measurement Conditions Min. Typ. Max. Unit. Pre-charge accuracy PRECHG IPRECHG=55m -35 +35 % Fast charge accuracy FSTCHG T2 TDET T3 IFSTCHG1=410m T3 TDET T6 IFSTCHG2=550m -15 +15-10 +10 Detect full charge accuracy DETFULL -35 +35 % Low L =L H 1.90 2.00 2.10 Low hysteresis width ( 1) LW 25 50 100 m Pre-charge P =L H 2.80 2.90 3.00 % Pre-charge hysteresis width ( 1) PW 25 50 100 m Re-charge R =H L 3.85 3.90 3.95 Over O =L H 4.30 4.35 4.40 TDET=L H T1-30 C±6 C 0.937 0.957 0.971 Battery Temperature TDET pin T2 T3 T4 TDET=L H 0 C±2 C TDET=L H 10 C±2.5 C TDET=H L 40 C±2.5 C 0.762 0.649 0.313 0.781 0.677 0.336 0.800 0.705 0.361 T5 TDET=H L 45 C±2.5 C 0.269 0.290 0.313 T6 TDET=H L 60 C±2.5 C 0.168 0.182 0.197 T7 TDET=H L 80 C±6 C 0.079 0.096 0.116 Battery Temperature TDET pin hysteresis width ( 1) THW T2, T3, T4, T5, T6 2 5 8 C pin output I=10m 0.4 pin output I=10m 0.4 CNT pin output CT ICT=5m 0.4 Output transistor resistance R =4.2 0.35 Ω First time charge timer T1STCHG 119.6 149.5 179.4 s Pre-charge timer TPRECHG 959 1199 1439 s Fast charge timer TFSTCHG 15354 19193 23032 s Full charge delay time TDETFULL 0.469 0.586 0.703 s Over delay time TO 0.058 0.073 0.088 s Re-charge delay time TR 0.058 0.073 0.088 s te : 1 guaranteed by design
Item Symbol Measurement Conditions Min. Typ. Max. Unit. First time delay time TFT 0.117 0.146 0.175 s blinking cycle TBL1 Charge stop T1 TDET T2, T6 TDET T7 1.874 2.342 2.810 s TBL2 bnormal charge prohibition 0.937 1.171 1.405 CE Low-Level input CEL Charge threshold 0 0.3 CE High-Level input CEH Charge threshold 2 CE pin input ICE 10 20 µ te : If the IC is damaged and control is no longer possible, its safety can not be guaranteed. Please protect with something other than this IC. Temperature is the setting value at B-alue 4250K (25/50 C)(NCP15WF104F03RC made by MURT MNUFCTURING). When the battery overdischarge condition, it fast charge (IFSTCHG2) 1/10 m charge for 149.5 seconds, and then it does not switch to pre-charging during that interval, it means the IC has identified a battery abnormality. If adjacent terminals are shorted or each terminal is short with or, there is a possibility that the IC malfunctions.
Measuring Circuit 9 8 10 NC TP3 7 11 PROG 6 12 TDET TP2 5 13 MM3324 CNT 4 14 CE TP1 3 15 CFB2 2 16 CFB1 1
Timing Chart pin Case of normal charging 4.2 0, control start Output 4.2 2.0 Low 2.9 Pre charge Pre charge Fast charging output control 3.9 Pre charge Re-charge Full charge pin Case of connecting abnormal adapter 0 3 6 Case of setting battery error (temparature pin ; open) Case of overcharged battery 4.2 control 4.2 control 0 0 pin 3 pin 4.35 pin over more than 0.073s
Case of overdischarged battery Case of time-up for Pre charging 4.2 control 4.2 control 0 0 pin 0 0.146s 1st time delay under 2 149.5s Fast charge Current x1/10m return to normal (over 2) pin pin over 2 19min 59s Pre charging pin under 2.9 Case of time-up for full charging Case of Full charged battery 4.2 control 4.2 control 0 0 pin pin over 2.9 5h 19min 53s of Full charge Fast charging pin 4.2 0.146s 1st time delay Full charge 1st time delay 0.146s, 1st time chrage 149.5s Case of Re-charged battery control 4.2 pin 0.073s 3.9 Re-charge delay time Fast charging
Flow Chart Input power supply (2.45 ) LED display LED lit up Charge stop LED display: Red blinking 2.34s cycle Charge flow STRT First time delay 146ms Battery temperature check 0~40ºC Battery check 4.20 4.35 lways judgment STRT dapter OK? 2.45 5.70 s a result of the always judgment, LED is controlled by "lways judgment flow" at " Charge stop " or "bnormal charge prohibition ". It follows the LED control of the charge flow excluding this. Charge restart Charge flow start again In 4.20, it changes to the next flow. First time charge Fast charge x1/10m 149.5s Battery check 2.0 4.20 Battery OK? When the value is normal, charging is restarted. The return permission temperature from the state of the charge stop becomes 5~55ºC. Battery check 2.9 Over OK? 2.0 4.35 Charge stop LED display : NO LED lit up Charge stop LED display : Red blinking 2.34s cycle Pre-charge mode 20min Timer STRT 2.0 Check is invalid before First time charge. Judged Battery Timer clear Red lit up 20min Timer TIME OUT Battery check 2.9 Battery temperature OK? 0~60ºC 0~10ºC Battery temperature OK? T -30ºC or 80ºC T CC=IFSTCHG1 C=4.200 Fast charge CCmode 10~45ºC CC=IFSTCHG2 C=4.200 5h Timer STRT 45~60ºC CC=IFSTCHG2 C=4.050 5h Timer TIME OUT CC=IFSTCHG2 CC=IFSTCHG1 Charge Current at CC -mode Battery check C C=4.200 C=4.050 Charge oltage at C-mode Fast charge Cmode 0ºC 10ºC 45ºC 60ºC *ll typ. numeric value 5h Timer TIME OUT Full charge check PROG 0.2 Backflow when being charging battery LED lit up FINISH charging bnormal charge prohibition Battery check 3.9 * When charging is prohibited, disconnect the power supply or remove the battery to start again. LED display : Red blinking 1.17s cycle Re-charge
pplication Circuit B+ C Input C dapter Input Protection Circuit Li-Ion Battery Pack CE CNT MM3324 TDET TH CFB1 PROG CFB2 NC TP1 TP2 TP3 B- Portable Equipment These circuits are typical examples provided for reference purposes, so in actual applications, the circuit constants, conditions and operations should be thoroughly studied. Mitsumi Electric Co., Ltd. assumes no responsibility for any trouble or damage as a result of the use of these circuits. Mitsumi Electric Co., Ltd. assumes no responsibility for any infringement of industrial property or any other right of a third party or us, as a result of the use of these circuits. If terminal CNT(4pin) is short with, keeps rising, and becoming it at risk. So in actual applications, the circuit constants, conditions and operations should be thoroughly studied.