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AAT3685IWP-4.2-1-T1 Datasheet

  • AAT3685IWP-4.2-1-T1

  • Lithium-Ion/Polymer Battery Charger

  • 21頁

  • ANALOGICTECH

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PRODUCT DATASHEET
AAT3685
BatteryManager
TM
General Description
The AAT3685 BatteryManager鈩?is a highly integrated
single cell lithium-ion/polymer battery charger IC designed
to operate with USB port or line adapter inputs. It
requires the minimum number of external components.
The AAT3685 precisely regulates battery charge voltage
and current for 4.2V lithium-ion/polymer battery cells.
Regardless of the type of input power source (USB or
adapter), the AAT3685 can be programmed for two
separate constant current charge levels up to 1A. An
optional Charge Reduction Loop is built in to allow users
to charge the battery with available current from the
charge supply, while keeping the port voltage regulated.
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. A
serial interface output is available to report any one of
14 various status states to a microcontroller.
The AAT3685 is available in a Pb-free, thermally-enhanced,
space-saving 12-pin 3x3mm TDFN package and is rated
over the -40擄C to +85擄C temperature range.
Lithium-Ion/Polymer Battery Charger
Features
鈥?Adapter or USB Charger
鈻?/div>
Programmable up to 1A Max
鈥?4.0V to 5.5V Input Voltage Range
鈥?High Level of Integration With Internal:
鈻?/div>
Charging Device
鈻?/div>
Reverse Blocking Diode
鈻?/div>
Current Sensing
鈥?Automatic Recharge Sequencing
鈥?Charge Reduction Loop
鈥?Battery Temperature Monitoring
鈥?Full Battery Charge Auto Turn-Off
鈥?Over-Voltage Protection
鈥?Emergency Thermal Protection
鈥?Power On Reset and Soft Start
鈥?Serial Interface Status Reporting
鈥?12-Pin 3x3mm TDFN Package
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cellular Telephones
Digital Still Cameras
Hand-Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Other Lithium-Ion/Polymer Battery-Powered Devices
Typical Application
Enable
Adapter or USB Input
Input Hi/Lo Select
ADP/USB
PWRSEL
SETH
R
SETH
R
SETL
SETL
BAT
TS
C2
10碌F
EN
CHR
BATT+
AAT3685
GND
BATT-
DATA
STAT1
STAT2
TEMP
Battery Pack
Serial Data
3685.2007.12.1.4
www.analogictech.com
1

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