AAT3680
Lithium-Ion Linear Battery Charge Controller
Preliminary Information
3680.2003.4.0.91 1
BatteryManager
™
Typical Application
Q1
FZT788B
AAT3680
C2
10µF
C1
4.7µF
R2
1k
R
SENSE
0.2Ω
R1
2.5k
BATT+
BATT-
TEMP
RT1
RT2
VP
Battery
Pack
DRV
CSI
VP
VP
VSS STAT
TS
BAT
T2X
D1
General Description
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, specifi-
cally designed for low cost compact portable appli-
cations. In a single 8-pin package, the AAT3680
precisely regulates battery charge voltage and
charge current. This device is capable of two trick-
le 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 tem-
perature failure, the device will automatically shut
down, thus protecting the charging device and the
battery under charge. A battery charge state mon-
itor 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.
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
Applications
• Cellular Phones
• Personal Digital Assistants (PDA's)
• Desktop Chargers
• USB Chargers