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Advanced Analogic Technologies

AAT3681A Datasheet Preview

AAT3681A Datasheet

500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger

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AAT3681A
500mA USB Port or AC Adapter
Lithium-Ion/Polymer Battery Charger
General Description
BatteryManager
Features
www.datasheTeht4euA.cAomT3681A BatteryManager is an integrated sin-
gle cell lithium-ion/polymer battery charger IC,
designed to operate from a DC power source or
USB port up to an input voltage of 7.5V. It requires
just one external component.
The AAT3681A precisely regulates battery charge
voltage and current for 4.2V (4.375V option) lithium-
ion/polymer battery cells. When charged from an
AC adapter or USB port, the battery charging cur-
rent can be set by an external resistor up to 500mA.
Battery charge state is continuously monitored for
fault conditions. In the event of an over-voltage,
short-circuit, or over-temperature failure, the
device will automatically shut down, thus protecting
the charging device, control system, and the bat-
tery under charge. A status monitor output pin is
provided to indicate the battery charge status by
directly driving an external LED.
The AAT3681A is available in a Pb-free, thermally
enhanced, space-saving 8-pin 2.0x2.1mm SC70JW
package and is specified for operation over the
-40°C to +85°C temperature range.
Typical Application
• USB or AC Adapter System Power Charger
— Programmable from 15mA to 500mA
• 4.0V ~ 7.5V Input Voltage Range
• High Level of Integration with Internal:
— Charging Device
— Reverse Blocking Diode
• Automatic Current Sensing
• Automatic Recharge Sequencing
• Full Battery Charge Auto Turn Off/Sleep
Mode/Charge Termination
• Shutdown Current <1µA
• Automatic Trickle Charge for Battery Pre-
Conditioning (AAT3681A-1 is No Trickle
Charge Option)
• Over-Voltage and Emergency Thermal
Protection
• Power On Reset and Soft Start
• LED Status Pin
• 8-Pin 2.0x2.1mm SC70JW Package
Applications
• Bluetooth® Headsets
• DECT Headsets
• Digital Still Cameras
• MP3, Portable Music, and Portable Media
Players
• Personal Data Assistants (PDAs)
• Wrist Watches
• Other Lithium-Ion/Polymer Battery-Powered
Devices
Adapter/USB Input
Enable
RSET
ADP
BAT
AAT3681A
STAT
EN
ISET
GND
BATT+
C
BATT-
Battery
Pack
3681A.2007.10.1.2
1




Advanced Analogic Technologies

AAT3681A Datasheet Preview

AAT3681A Datasheet

500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger

No Preview Available !

AAT3681A
500mA USB Port or AC Adapter
Lithium-Ion/Polymer Battery Charger
Pin Description
www.datasPheinet4#u.com Symbol
1 EN
Type
In
2
3
4
5
6, 7, 8
ISET
BAT
ADP
STAT
GND
In/Out
In/Out
Power In
Out
Power
Function
Enable pin.
AAT3681A, AAT3681A-1: Logic high enables the IC (internally pulled down).
AAT3681A-2: Logic low enables the IC (internally pulled down).
AAT3681A-3: Logic low enables the IC (no internal pull-down resistor).
Connect resistor here to set the charge current.
Battery charging and sensing.
Input from USB/adapter charger.
Open drain status pin.
Ground connection.
Pin Configuration
SC70JW-8
(Top View)
EN 1
ISET 2
BAT 3
ADP 4
8 GND
7 GND
6 GND
5 STAT
2 3681A.2007.10.1.2



Part Number AAT3681A
Description 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Maker Advanced Analogic Technologies
Total Page 17 Pages
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AAT3681A Datasheet PDF





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1 AAT3681 USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
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2 AAT3681A 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
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