AIC1803

AIC1803 Three-Cell Lithium-Ion Battery Protection IC n FEATURES l l l l n DESCRIPTION The AIC1803 is designed to protect the lithiumion battery from damage or degrading the lifetime due to overcharging, overdischarging and overcurrent for three-cell lithium-ion battery powered systems such as notebook PCs. It can also provide the cell-balancing “bleeding” function to automatically discharge the overcharged cell until the overcharge condition is released. Safe and full utilization charging is ensured by the accurate ± 30mV overcharge detection. Four different specification values for overcharge protection voltage are provided for various protection requirements. The very low standby current drains little current from the cell while in storage. Ultra-Low Quiescent Current at 13 µA (V CELL=3.5V). Ultra-Low Power-Down Current at 1.3µA (V CELL=2.3V) Wide Supply Voltage Range: 2V to 18V. Precision Overcharge Protection Voltage: 4.35V ± 30mV for the AIC1803A 4.30V ± 30mV for the AIC1803B 4.25V ± 30mV for the AIC1803C 4.20V ± 30mV for the AIC1803D l l l Externally Set Overcharge, Overdischarge and Overcurrent Delay Time. Built-in Cell-balancing Bleeding Network under Overcharge Condition. Three Detection Levels for Overcurrent Protection. n l APPLICATIONS Protection IC for Three-Cell Lithium-Ion Battery Pack. n TYPICAL APPLICATION CIRCUIT R8 1K 1 2 OC CS VCC VC1 16 15 R4 C4 0.1µ F 1K M1 FUSE BATT+ R5 1M BAT1 Q1 M2 C1 R1 2K 0.1µ F 3 4 OD NC UD1 VC2 14 13 R2 2K C...