MM3855EN7RRE

MM3855 Series Thermal protection and control terminal for charge and discharge off mode protection IC Outline MM3855 series are protection ICs with thermal protection and control teminal for charge and discharge off mode for Lithium-ion and Lithium-polymer rechargeable battery. By using external thermistor, this protects the battery pack and system over temperature. In addition, it reduces the current consumption of system by using charge and dischrge off mode , when the system is shutdown. Features (Unless otherwise specified, Ta=25°C) (1) Range and accuracy of detection/release voltage Overcharge detection voltage.............................Vdet1...............4.1V to 5.0V................ ±20mV 5mVstep ±20mV(Ta=-20 to +60°C) Overdischarge detection voltage........................Vdet2...............2.1V to 3.0V................ ±35m 50mV step ±40mV(Ta=-20 to +60°C) Discharging overcurrent detection voltage1.......Vdet3-1............6mV to 100mV............ ±2.5mV 1mV step ±3.0mV (Ta=-20 to +60°C)*1 Discharging overcurrent detection voltage2.......Vdet3-2............15mV to 100mV.......... ±3.5mV 1mV step ±4.0mV (Ta=-20 to +60°C)*1 Charging overcurrent detection voltage..............Vdet4...............-6mV to -100mV......... ±2.5mV 1mV step ±3.0mV(Ta=-20 to +60°C)*1 Short detection voltage.......................................tShort...............30mV to 200mV.......... ±5.0mV 10mV step ±5.5mV (Ta=-20 to +60°C)*1 0V battery charge inhibition battery voltage.......Vst...................0.9V............................ ±0.3V *1 Accuracy of overcurrent detection voltage (Ta=25 °C) 11 10 Vshort Accuracy [mV] 9 Vdet3-2 8 Vdet3-1, Vdet4 7 6 5 4 3 2 1 0 0 10 20 30 40 50 60 70 80 90 100 Overcurrent detection voltage [mV] (2) Temperature detection function..............................Selectable “Enable” or “Disable” (3) 0V battery charge function ....................................Selectable “Permission” or “Inhibition” 4) Control terminal for charge and discharge off mode 5) Current consumption............................................... (Not include NTC bias current) Normal mode......................................................Temperature detection function “Enable” Temperature detection function “Disable” 1 3.0µA typ. 5.0µA max. (Ta=-20 to +85°C) 2.5µA typ. 4.5µA max. (Ta=-20 to +85°C) Standby mode....................................................Overdischarge latch function “Enable”.... 0.1µA max. (Ta=-20 to +60°C) Overdischarge latch function “Disable”... 0.8µA max. (Ta=-20 to +85°C) MM3 8 5 5 S e rie s Pin assignment SSON-8F SSON-8G (Top view) Pin no. Symbol Function 1 CNT Control terminal for charge and discharge FET 2 VM Input terminal for charger negative voltage *5;   ;/ 3 COUT Control terminal for charge FET =4   *: 4 DOUT Control terminal for discharge FET 5 VDD Input terminal for negative power supply voltage 6 VSS Input terminal for positive power supply voltage 7 CS Input terminal for overcurrent detection 8 TH Input terminal for temperature detection *6