Outline
This is a 3-cell series protection IC is for protecting a lithium ion battery from overcharging and excess discharging. If abnormalities occur during charging and excess voltage is applied, it has a function that turns off the external FET switch (overcharging detection). It also has a function that turns off the external FET switch when the voltage for each battery falls below a set voltage, to prevent excess discharge when discharging the battery (discharging detection). At that time, the IC is switched to low current consumption mode.
These functions comprise a protection circuit, with few external parts, for lithium ion batteries.

FEATUREs
1. Current consumption (for VCC pin)  VCELL=4.4V    700µA typ.
2. Current consumption (for VCC pin)  VCELL=4.2V    300µA typ.
3. Current consumption (for VCC pin)  VCELL=3.8V    25µA typ.
4. Current consumption (for VCC pin)  VCELL=2.2V    0.1µA max.
5. Current consumption (for BATH pin) VCELL=4.4V    12µA typ.
6. Current consumption (for BATH pin) VCELL=3.8V    8µA typ.
7. Current consumption (for BATH pin) VCELL=2.2V    1µA typ.
8. Charge prohibit voltage (Ta=-20°C~+70°C) B : 4.35V±50mV
                                                            C : 4.25V±50mV
9. Charge prohibit release voltage VCELLU-45mV
10.Charge prohibit detection function operation voltage B : 4.20V typ.
                                                                          C : 4.10V typ.
11.Excess discharge detection voltage 2.40V±0.09V, 2.35V±0.09V
12.Discharge resumption voltage B : 2.65V±0.16V
                                            C : 2.60V±0.16V
13.Excess discharge detection hysteresis voltage 250±75mV

APPLICATIONs
1. Notebook PCs
2. Portable terminals
3. Others