MM3855 MITSUMI | Alldatasheet

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Technical content

Thermal protection and control terminal for charge and discharge off mode protection IC MM3855 Series 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. (1) Range and accuracy of detection/release voltage 5mVstep ±20mV(Ta=-20 to +60°C) 50mV step ±40mV(Ta=-20 to +60°C) 1mV step ±3.0mV (Ta=-20 to +60°C)*1 1mV step ±4.0mV (Ta=-20 to +60°C)*1 1mV step ±3.0mV(Ta=-20 to +60°C)*1 10mV step ±5.5mV (Ta=-20 to +60°C)*1 *1 Accuracy of overcurrent detection voltage (Ta=25 °C) 4) Control terminal for charge and discharge off mode 5.0µA max. (Ta=-20 to +85°C) Temperature detection function “Disable” 2.5µA typ. 4.5µA max. (Ta=-20 to +85°C) Outline Features (Unless otherwise specified, Ta=25°C) Accuracy [mV] Overcurrent detection voltage [mV] 0 10 20 30 40 50 60 70 80 90 100 Vshort Vdet3-2 Vdet3-1, Vdet4

Pin no. Symbol Function

1 CNT Control terminal for charge and discharge FET

2 VM Input terminal for charger negative voltage

3 COUT Control terminal for charge FET

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

(Top view) Delay time *1 tVdet1 tVdet2 tVdet3-1 tVdet3-2 tVdet4 tShort1 tCDGdet tRdetTH sec msec msec msec msec µsec msec msec A 1.024 64 4096 16 16 280 48 512 B 1.024 64 4096 16 16 280 48 No function C 1.024 20 16 No function 16 300 48 No function D 1.024 128 8 No function 8 250 48 512 E 1.024 2048 2048 No function 8 280 48 64 *Please inquire to us, if you need another spec. Model Overcharge detection Overdischarge detection Discharging overcurrent detection 1 Discharging overcurrent detection 2 Charging overcurrent detection Short detection1 Temperature detection resistance Overcharge detection latch function Overdischarge detection latch function Discharging overcurrent latch functio Charging overcurrent latch function 0V battery charge function Temperature detection function Delay time *1 Vdet1 Vdet2 Vdet3-1 Vdet3-2 Vdet4 Vshort1 RdetTH V V mV mV mV V --- LINE UP MITSUMI ELECTRIC CO., LTD. =:: =++ ;/*5; *6<; +6<;