MM1301AW 查看數據表（PDF） - Mitsumi

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MM1301AW

Protection of Lithium Ion Batteries (one cell)

Mitsumi 

MITSUMI

Protection of Lithium Ion Batteries (one cell) MM1301

Overcurrent detection delay time 1

tCS1

5.0 10.0 15.0 mS

Overcurrent detection delay time 2

tCS2

Overdischarge detection delay time

tOD

*1

30 100 µS

5.0 10.0 15.0 mS

Overcharge detection delay time

tOC

OC pin output current

IOC

* CTD=0.082µF 2

VCC=VIN=4.5V

0.5 1.0 1.5 S

-30 µA

GD pin "H" Output voltage

(Normal mode)

VGDH

VCC=VIN=3.5V

VCC VCC

V

-0.3 -0.1

GD pin "L" Output voltage

(Overcurrent mode)

VGDL1

VCC=VIN=3.5V

VCS=0.5V

0.1 0.3 V

GD pin "L" Output voltage

(Overdischarge mode)

VGDL2

VCC=VIN=1.5V

0.2 0.4 V

*1: The overcurrent short mode delay time (overcurrent delay time 2) is the response time of the IC itself.

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.

*2: Use the following formula to calculate the overcharge detection time:

overcharge detection dead time tOC = 12.2 CTD [S]

[where CTD is the external capacitance in µF]

Timing Chart

Overcharge cutoff voltage

Cell voltage

Overcharge expulsion voltage

Overdischarge expulsion voltage

TD

FET gate (charge control)

Overdischarge cutoff voltage

FET gate (discharge control)

removing load

Normal mode

Normal mode

Normal mode

Overcharge mode

Overcurrent

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