AIC1802 Datasheet | Analog Intergrations Corporation

FEATURES l n DESCRIPTION The AIC1802 battery protection IC is designed to protect lithium-ion batteries from damage due to overcharging, overdischarging, and overcurrent for two series cells in portable phones and laptop puters. It can be a part of the low-cost charge control system within a twocell lithium-ion battery pack. Safe and full utilization charging is ensured by the accurate ± 30m V overcharge detection. Three different specification values for overcharge protection voltage are provided for various protection requirements. The very low standby current drains little current from the cells while in storage. Ultra-Low Quiescent Current at 10 µA (V CC =7V, VC =3.5V). Ultra-Low Power-Down Current at 0.2µA (V CC =3.8V, VC =1.9V). Wide Supply Range: 2 to 18V. Precision Overcharge Protection Voltage 4.35V ± 30m V for the AIC1802A 4.30V ± 30m V for the AIC1802B 4.25V ± 30m V for the AIC1802C l l l l Built-in Delay Circuits for Overcharge, Overdischarge and Overcurrent Protection. Overcharge and Overdischarge Delay Time can be Extended by External Capacitors. Built-in Cell-balancing Bleeding Network under Overcharge Condition. l l n APPLICATIONS l Protection IC for Two-Cell Lithium-Ion Battery Pack. n TYPICAL APPLICATION CIRCUIT V BAT+ - - R1 C1 1µ F C2 1µ F - - R2 M1 CEM9926 2 OD AIC1802 CS 7 8 VCC TC 5 - CTC 6 VC TD 3 - CTD 4 GND OC 1 R3 1M Q1 R6 1K M2 CEM9926 BATTERY 1 BATTERY 2 R4 1M R5 C3 0.01µF 1M VBAT- - CTC & CTD are optional for delay time adjustment. - - R1 & R2: Refer application informations. Protection Circuit for Two-Cell Lithium-Ion Battery Pack DS-1802-03 July 13, 00 .analog..tw AIC1802 n ORDERING INFORMATION AIC1802 XCX PACKAGE TYPE S: SOP-8 OVERCHARGE PROTECTION VOLTAGE A: 4.35V B: 4.30V C: 4.25V ORDER NUMBER AIC1802ACS AIC1802BCS AIC1802CCS (PLASTIC SO8) PIN CONFIGURATION TOP VIEW OC 1 OD 2 TD 3 GND 4 8 VC 7 CS 6 VC 5 TC n ABSOLUTE MAXIMUM RATINGS Supply Voltage … … … … …...