PRODUCT DATASHEET
AAT3689
BatteryManager
TM
General Description
The AAT3689 BatteryManager is a highly integrated sin-
gle cell lithium-ion/polymer battery charger IC designed
to operate with USB port and AC adapter inputs. It
requires a minimum number of external components.
The AAT3689 precisely regulates battery charge voltage
and current for 4.2V lithium-ion/polymer battery cells.
Adapter charge current rates may be programmed up to
1.0A. In the absence of an adapter and with a USB port
connected, the battery can also be charged by USB
power. The USB charge current can be programmed up
to 500mA. USB charging is disabled when an adapter is
present.
Battery temperature and charge state are fully moni-
tored for fault conditions. In the event of an over-volt-
age or over-temperature failure, the device will auto-
matically shut down, thus protecting the charging device,
control system, and the battery under charge. Status
monitor output pins are provided to indicate the battery
charge status by directly driving two external LEDs.
The AAT3689 is available in a Pb-free, thermally-enhanced,
space-saving 12-pin 3x3mm TDFN package and is rated
over the -40°C to +85°C temperature range.
0.5A/1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger
Features
• USB/AC Adapter System Power Charger
▪
USB: Programmable up to 500mA
▪
Adapter: Programmable up to 1.0A
• 4.0V to 5.5V Input Voltage Range
• Adapter Presence Automatically Disables USB Charging
• High Level of Integration With Internal:
▪
Charging Devices
▪
Reverse Blocking Diodes
▪
Current Sensing
• Automatic Recharge Sequencing
• Battery Temperature Monitoring
• Full Battery Charge Auto Turn-Off
• Over-Current Protection
• Over-Voltage Protection
• Emergency Thermal Protection
• Power On Reset and Soft Start
• 12-Pin 3x3 TDFN Package
Applications
•
•
•
•
•
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Cellular Telephones
Digital Still Cameras
Hand-Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Other Lithium-Ion/Polymer Battery-Powered Devices
Typical Application
Enable
EN
USB Input
USB
USBSET
R
SETUSB
BATT+
BAT
TS
C2
10μF
AAT3689
ADP Input
R
SETADP
ADP
ADPSET
STAT1
BATT-
CT
C
T
GND
TEMP
STAT2
Battery Pack
3689.2007.12.1.1
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