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

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)

(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” 3.0µA typ.

5.0µA max. (Ta=-20 to +85°C)

Temperature detection function “Disable” 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)

Outline

Features

(Unless otherwise specified, Ta=25°C)

Overcurrent detection voltage [mV]

11

10

9

8

7

6

5

4

3

2

1

0

0

10

20

30

40

50

60

70

80

90

100

Vshort

Vdet3-2

Vdet3-1, Vdet4

1