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AAT3686IXN-4.2-1-T1 Datasheet

  • AAT3686IXN-4.2-1-T1

  • USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger

  • 23頁(yè)

  • ANALOGICTECH

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PRODUCT DATASHEET
AAT3686
BatteryManager
TM
General Description
The AAT3686 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 the minimum number of external components.
The AAT3686 precisely regulates battery charge voltage
and current for 4.2V lithium-ion/polymer battery cells.
Adapter charge current rates can be programmed up to
1.5A. In the absence of an adapter and with a USB port
connected, the battery can also be charged by USB power.
Depending on the USB port type, the AAT3686 charge
current can be programmed for two separate levels up to
500mA. An optional Charge Reduction Loop is also built in
to allow users to charge the battery with available current
from a USB port, while keeping the port voltage regulat-
ed. 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. A
serial interface output is available to report 22 various
status states to a microcontroller.
The AAT3686 is available in a Pb-free, thermally-
enhanced, space-saving TDFN34-16 (3x4mm) or
TDFN44-16 (4x4mm) package and is rated over the
-40擄C to +85擄C temperature range.
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Features
鈥?USB Port/AC Adapter System Power Charger
鈻?/div>
USB: Programmable to 500mA for USB Hi/Lo
鈻?/div>
Adapter: Programmable to 1.5A Max
鈥?4.0V to 5.5V Input Voltage Range
鈥?Adapter Present Indicator (ADPP# Pin)
鈥?Adapter Presence Automatically Disables USB Charging
鈥?High Level of Integration With Internal:
鈻?/div>
Charging Devices
鈻?/div>
Reverse Blocking Diodes
鈻?/div>
Current Sensing
鈥?Automatic Recharge Sequencing
鈥?Digital Thermal Regulation in ADP Charge
鈥?Charge Reduction Loop in USB Charge
鈥?Battery Temperature Monitoring
鈥?Full Battery Charge Auto Turn-Off
鈥?Over-Voltage and Emergency Thermal Protection
鈥?Power On Reset and Soft Start
鈥?Serial Interface Status Reporting
鈥?TDFN34-16 or TDFN44-16 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
USB Input
USB Hi/Lo Select
USB
USBSEL
USBH
R
SETH
R
SETL
USBL
BAT
TS
CT
C
T
C2
10碌F
EN
CHR
BATT+
AAT3686
BATT-
ADP Present
ADP Input
R
SET
ADPP#
ADP
ADPSET
STAT1
GND
DATA
STAT2
TEMP
Battery Pack
Serial Data
3686.2007.12.1.11
www.analogictech.com
1

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