AIC1804 Datasheet | Analog Intergrations Corporation

FEATURES l n DESCRIPTION The AIC1804 is designed to protect the lithiumion battery from damage or degrading the lifetime due to overcharging, overdischarging and overcurrent for three- or four-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. Cell Number Selection Function to Select 3 or 4 cells Protection. Ultra-Low Quiescent Current at 17 µA (4-Cell, VCELL=3.5V). Ultra-Low Power-Down Current at 2.2µA (4-Cell, VCELL=2.3V) Wide Supply Voltage Range: 2V to 18V. Precision Overcharge Protection Voltage: 4.35V ± 30m V for the AIC1804A 4.30V ± 30m V for the AIC1804B 4.25V ± 30m V for the AIC1804C 4.20V ± 30m V for the AIC1804D Externally Set Overcharge, Overdischarge and Overcurrent Delay Time. Built-in Cell-balancing Bleeding Network under Overcharge Condition. Three Detection Levels for Overcurrent Protection. l l l l l l l n l APPLICATIONS Protection IC for Three- or Four-Cell Lithium-Ion Battery Packs. n TYPICAL APPLICATION CIRCUIT R8 1K 1 16 R1 200 SI4435 M1 SI4435 M2 R5 1M 2N3906 Q1 FUSE BATT+ C1 0.1µ F BAT1 R2 2K BAT2 R3 2K BAT3 R4 R7 1M UD1 15 VC1 3 CS C2 0.1µ F 4 OD 5 TD UD2 13 12 VC2 C3 0.1µ F R6 1M CT D 82n F CT I 2.2n F TI 7 TC C TC 82n F 8 UD3 11 10 VC3 C4 0.1µ F 33K BAT4 UD4 BATT- Protection Circuit for Four-Cell Lithium-Ion Battery Pack DS-1804-01 July 13, 00 .analog..tw AIC1804 n ORDERING INFORMATION AIC1804 XXX PACKAGE TYPE S: SMALL OUTLINE TEMPERATURE RANGE C=0 °C~70° C OVERCHARGE PROTECTION VOLTAGE A: 4.35V B: 4.30V C: 4.25V D: 4.20V...