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AAT3683IOQ-4.2-3-T1 Datasheet(PDF) 10 Page - Advanced Analogic Technologies |
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AAT3683IOQ-4.2-3-T1 Datasheet(HTML) 10 Page - Advanced Analogic Technologies |
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10 / 24 page  AAT3683 1A Linear Li-Ion Battery Charger 10 3683.2007.06.1.0 Functional Block Diagram Charge Control Current Compare Reverse Blocking CV/Pre- charge Constant Current IN BAT ISET UVLO Over- Temp. Protect Power Detection STAT (3683-2/-3 only) GND EN Thermal Loop ADPP# Charge Status Battery OV Protection STAT1 (3683-4 only) STAT2 (3683-4 only) (3683-2/-3 only) IC Enable Watchdog Timer CT 75μA TS (3683-2 only) Window Comparator Functional Description The AAT3683 is a high performance battery charg- er designed to charge single-cell lithium-ion or lithi- um-polymer batteries with up to 1A of current from an external power source. It is a stand-alone charging solution, with just one external compo- nent required for complete functionality. The AAT3683 precisely regulates battery charge voltage and current for 4.2V lithium-ion/polymer battery cells with constant current level being pro- grammed up to 1A for rapid charging applications. The charge termination current can be pro- grammed by an external resistor. The AAT3683 is rated for operation from -40°C to +85°C. In the event of operating ambient tempera- tures exceeding the power dissipation abilities of the device package for a given constant current charge level, the charge control will enter into thermal limit. AAT3683-2 and -3 provide one status monitor out- put pin (STAT) by directly driving one external LED to indicate the battery charging state. AAT3683-4 provides two status pins to indicate the battery charging state. Device junction temperature and charge state are fully monitored for fault conditions. In the event of an over-voltage or over-temperature failure, the device will automatically shut down, protecting the charging device, control system, and the battery under charge. During battery charging, the device temperature will rise. In some cases with adapter (ADP) charging, the power dissipation in the device may causethe junction temperature to rise to close to its thermal shutdown threshold. In the event of an internal over-temperature condition caused by excessive ambient operating temperature or excessive power dissipation condition, the AAT3683 enables a digi- |
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