MITSUMI

Protection of Lithium Ion Batteries (one cell) MM1301

Timing Chart

Overcharge cutoff voltage

Overcharge expulsion voltage

Overdischarge expulsion voltage

Overdischarge cutoff voltage

removing load

Cell voltage

TD

FET gate (charge control)

FET gate (discharge control)

Normal mode

Normal mode

Normal mode

Overcurrent

Overcharge mode

In actual use, the time required for discharge of the gate capacitance of the discharge-controlling FET is

added to this.

When excessive currents cause considerable voltage fluctuation, the bias current within the IC may be

temporarily turned off, so that the response time is lengthened. The time constant of the capacitance and

resistance connected to the power supply pin should be set to at least 100µS/V, to limit power supply

fluctuations.

Overcurrent detection delay time 1

5.0

10.0

15.0

mS

Overcurrent detection delay time 2

30

100

µS

Overdischarge detection delay time

5.0

10.0

15.0

mS

Overcharge detection delay time

0.5

1.0

1.5

S

OC pin output current

-30

µA

GD pin "H" Output voltage

V

(Normal mode)

-0.3

-0.1

GD pin "L" Output voltage

(Overcurrent mode)

0.1

0.3

V

GD pin "L" Output voltage

(Overdischarge mode)

0.2

0.4

V