mm1412 Mitsumi Electronics, Corp., mm1412 Datasheet - Page 3

• Manufacturer Part Number: mm1412
• Description: Protection For Lithium-ion Batteries
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Pin Description
Note: Mode Descriptions
Pin No. Pin name
(1) Overcharge mode
(2) Normal mode
(3) Overdischarge mode
(4) Overcurrent mode
1
2
3
4
5
6
7
8
Either upper cell or lower cell battery voltage exceeds overcharge detection voltage. Overcharge
detection operation delay can be set by the dead time setting pin.
Both upper cell and lower cell battery voltages exceed overdischarge detection voltage and are less
than overcharge detection voltage.
Either upper cell or lower cell battery voltage is less than overdischarge detection voltage.
Overdischarge detection dead time is set internally. Overdischarge mode is released when charging
causes voltage to rise above overdischarge detection voltage. Also, when battery voltage goes above
overdischarge release voltage, it resets without charging, but the value is set high. (This function is
included in case charging can not be detected. Also, this release voltage has a temperature coefficient
of -6mV/°C.)
Voltage between CS and GND exceeds overcurrent detection voltage during discharge.
GND
GD
V
OC
TD
VH
CS
VL
CC
Overcharge detection output pin
PNPT
Overcharge mode: ON
Normal mode, overdischarge mode, overcurrent mode: OFF
Discharge control FET (N-ch) control output pin
Normal mod, overcharge mode: H
Overdischarge mode, overcurrent mode: L
Overcurrent detection input pin
Monitors discharge current equivalently by the voltage drop between discharge control FET source
and drain. Stops discharge when voltage between CS pin and GND pin goes above overcurrent
detection threshold value, and holds until load is released.
Ground pin, or lower cell load negative pole input pin.
Overcharge detection dead time setting pin
Dead time can be set by adding a capacitor between TD and GND pins.
Battery intermediate potential input pin
Connection pin for lower cell positive electrode side and upper cell negative electrode side.
Power supply input pin
Upper cell positive electrode input pin
R
open collector output
Protection for Lithium-Ion Batteries (2-serial cells) MM1412
Functions