MM1309

MITSUMI Protection of Lithium Ion Battery (three cells in series) MM1309 Protection of Lithium Ion Batteries (three cells in series) Monolithic IC MM1309 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. 2. 3. 4. 5. 6. 7. 8. Current consumption (for VCC pin) Current consumption (for VCC pin) Current consumption (for VCC pin) Current consumption (for VCC pin) Current consumption (for BATH pin) Current consumption (for BATH pin) Current consumption (for BATH pin) Charge prohibit voltage (Ta=-20°C~+70°C) VCELL=4.4V VCELL=4.2V VCELL=3.8V VCELL=2.2V VCELL=4.4V VCELL=3.8V VCELL=2.2V 700µA typ. 300µA typ. 25µA typ. 0.1µA max. 12µA typ. 8µA typ. 1µA typ. B : 4.35V±50mV C : 4.25V±50mV VCELLU-45mV B : 4.20V typ. C : 4.10V typ. 2.40V±0.09V, 2.35V±0.09V B : 2.65V±0.16V C : 2.60V±0.16V 250±75mV 9. Charge prohibit release voltage 10.Charge prohibit detection function operation voltag...