AIC1803 Datasheet | Analog Intergrations Corporation

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 ± 30m V 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 ± 30m V for the AIC1803A 4.30V ± 30m V for the AIC1803B 4.25V ± 30m V for the AIC1803C 4.20V ± 30m V 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 C2 0.1µ F 5 6 CTD 82n F CTI 2.2n F TD TI UD2 VC3 12 11 R3 33K C3 0.1µ F BAT2 R7 1M BAT3 R6 1M CTC 82n F TC NC UD3 GND AIC1803 10 9 BATT- Protection Circuit for Three-Cell Lithium-Ion Battery Pack DS-1803-01 July 14, 00 .analog..tw AIC1803 n ORDERING...