Lithium-Ion Linear Battery Charge Controller
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.
AAT3680
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
BatteryManager
™
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
Preliminary Information
Applications
•
•
•
•
Cellular Phones
Personal Digital Assistants (PDA's)
Desktop Chargers
USB Chargers
Typical Application
VP
R
SENSE
0.2Ω
Q1
FZT788B
BATT+
C2
10µF
R1
2.5k
DRV
T2X
VP
CSI
BAT
BATT-
AAT3680
VP
TS
RT1
TEMP
VSS
C1
4.7µF
D1
RT2
STAT
Battery
Pack
R2
1k
3680.2003.4.0.91
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
