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AAT - USB Port Lithium-Ion/Polymer Battery Charger

Numéro de référence AAT3688
Description USB Port Lithium-Ion/Polymer Battery Charger
Fabricant AAT 
Logo AAT 





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AAT3688 fiche technique
AAT3688
USB Port Lithium-Ion/Polymer Battery Charger
General Description
BatteryManager
Features
The AAT3688 BatteryManager™ is a highly inte-
• USB Charger
grated single cell lithium-ion/polymer battery
— Programmable up to 500mA Max
charger IC designed to operate with USB port
• 4.0V to 5.5V Input Voltage Range
inputs. It requires the minimum number of external
• High Level of Integration With Internal:
components.
— Charging Device
The AAT3688 precisely regulates battery charge
voltage and current for 4.2V lithium-ion/polymer
battery cells. Depending on the USB port type, the
AAT3688 charge current can be programmed for
two separate levels up to 500mA. An optional
Charge Reduction Loop is built in to allow users to
charge the battery with available current from a
USB port, while keeping the port voltage regulated.
Battery temperature and charge state are fully
monitored for fault conditions. In the event of an
over-voltage or over-temperature failure, the
— Reverse Blocking Diode
— Current Sensing
• Automatic Recharge Sequencing
• Charge Reduction Loop for USB Charging
• Battery Temperature Monitoring
• Full Battery Charge Auto Turn-Off
• Over-Voltage Protection
• Emergency Thermal Protection
• Power On Reset and Soft Start
• Serial Interface Status Reporting
• 12-Pin 3x3mm TDFN Package
device will automatically shut down, thus protecting
the charging device, control system, and the bat-
tery under charge. Status monitor output pins are
provided to indicate the battery charge status by
Applications
directly driving two external LEDs. A serial interface
output is available to report any one of 14 various •www.DataSheet4U.com Bluetooth™ Headsets
status states to a microcontroller.
• Cellular Telephones
The AAT3688 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 tem-
perature range.
• Digital Still Cameras
• Hand-Held PCs
• MP3 Players
• Personal Data Assistants (PDAs)
• Other Lithium-Ion/Polymer Battery-Powered
Devices
Typical Application
Enable
USB Input
USB Hi/Lo Select
RSETH
USB
USBSEL
USBH
EN CHR
BAT
USBL
TS
RSETL AAT3688
GND
STAT1
DATA
STAT2
BATT+
C2
10μF
BATT-
TEMP
Battery Pack
Serial Data
3688.2006.10.1.5
1

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