MM1292

` Current consumption (during overcharging)                         V<sub>CELL</sub>=4.5V            80A typ.
` Current consumption (normal)                                              V_CELL=3.5V            13A typ.
` Current consumption (during excess discharging)                V<sub>CELL</sub>=1.9V            0.5A typ.
` Current consumption (during excess discharging)                V_CELL=1.0V            0.1A max.
` Overcharge detection voltage (Ta=-20°C~+70°C)                                           4.25V±50mV (detection for each cell)
` Hysteresis voltage                                                                                               200mV±60mV (detection for each cell)
` Excess discharge detection voltage                                                                     2.4V±0.1V (detection for each cell)
` Discharge resumption voltage                                                                              3.0V±0.1V (detection for each cell)
` Overcurrent detection voltage                                                                              150mV±15mV
` Reset after overcurrent                                                                                        detection load release
` Operating limit voltage                                                                                         0.9V max.

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[Outline]
This IC MM1292 is used for protecting lithium ion batteries (two cell series connection type). Overcharge detection, excess discharge detection, and overcurrent detection are built into each circuit. It controls the FET for discharge control and charge control (external N-MOS FET). There are four major operating modes of MM1292.

1. Overcharge mode
             When the voltage between Vh-VI and VI-GND exceeds the overcharge voltage (V_ALM).

2. Normal mode
             When the voltage between Vh-VI and VI-GND exceeds the excess discharge voltage (V_S) and is less
than the over charge voltage (V_ALM).

3. Excess discharge mode
             When the voltage between Vh-VI and VI-GND is less than the excess discharge voltage (V_S).

4. Overcurrent mode
             When the voltage between CS-GND is less than the overcurrent voltage (V_CS).