mm1491 Mitsumi Electronics, Corp., mm1491 Datasheet - Page 9

• Manufacturer Part Number: mm1491
• Description: Lithium Battery Protection 1-cell Series
• Manufacturer: Mitsumi Electronics, Corp.

2. Overdischarge detector
· The voltage of V
· About the release from the mode of overdischarge
· It is assumed that CO can be assumed to be "H" and charge if the voltage of the charger which connects
· The delay time when overdischarge is detected is set internally (10ms typ.).
· After overdischarge is detected, all circuit are stopped, and the current which IC consumes is decreased as
Image figure when over-discharge mode
overdischarge detector under overdischarge detect voltage (2.3V typ.). The electrical discharge is stopped
by DO pin (6 pin) outputting "L", and turning off FET for the discharge.
Battery below the overdischarge detecting voltage through the parasitic diode of discharge FET.
The case that V
of overdischarge, is turned on the discharge FET.
the charger is over 0V charging minimum operating voltage (2V typ.) at 0V in the voltage of the battery.
It does not enter the mode of the overdischarge detection when rising more than the overdischarge
detecting voltagein delay time even if V
much as possible. (at V
CC
CC
becomes more than the release overdischarge detect voltage by charging, from the mode
(2 pin) is observed when the battery is discharged, and V
CC
=1.9V : 0.05µA typ.)
CC
becomes below the overdischarge detecting voltage.
CC
enters the mode of the