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The AAT3680 BatteryManager™ is a member of AnalogicTech's Total Power Management IC™ family. This device is an advanced Lithium-Ion (Li- Ion) battery charge and management IC, specifically designed for low cost compact portable applications. In a single 8-pin package, the AAT3680 precisely regulates battery charge voltage and charge current. This device is capable of two trickle charge current levels controlled by one external pin. Battery charge temperature and charge state are carefully monitored for fault conditions. In the event of an over current, short circuit or over temperature failure, the device will automatically shut down, thus protecting the charging device and the battery under charge. A battery charge state monitor output pin is provided to indicate the battery charge status though a display LED. The battery charge status output is a serial interface which may also be read by a system microcontroller.
The AAT3680 is available in an 8-pin MSOP or 12-pin TSOPJW package, specified over -20 to 70°C range.
AAT3680 Maximum Ratings
Symbol
Description
Value
Units
VP
VP relative to VSS
-0.3 to 16
V
VCSI
CSI to GND
-0.3 to VP+0.3
V
VT2X
T2X to GND
-0.3 to 5.5
V
VBAT
BAT to GND
-0.3 to VP+0.3
V
TJ
Operating Junction Temperature Range
-40 to 150
°C
TLEAD
Maximum Soldering Temperature (at Leads)
300
°C
ESD
ESD Rating
Note 1
kV
AAT3680 Features
• 4.5V to 15V Input voltage range • 1% Accurate Preset Voltages: 4.1V, 4.2V, 8.2V, 8.4V • Low operation current, typically 0.5mA • Programmable Charge Current • Automatic recharge sequencing • Battery temperature monitoring • Deep discharge cell conditioning • Fast trickle charge option with thermal over-ride • Full battery charge auto turn off / sleep mode • Over voltage, current and temperature protection • Power on reset • LED Charge Status Output or System Microcontroller serial interface • Temperature range -20 to 70°C • 8 pin MSOP, 12 pin TSOPJW package
AAT3680 Typical Application
• Cellular Phones • Personal Digital Assistants (PDA's) • Desktop Chargers • USB Chargers