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Advanced Analogic Technologies

AAT3684 Datasheet Preview

AAT3684 Datasheet

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

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BatteryManagerTM
PRODUCT DATASHEET
AAT3684
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
General Description
The AAT3684 BatteryManager is an integrated single cell
wwliwth.diuatmas-hieoent4/pu.ocloymmer battery charger IC, designed to oper-
ate from a DC power source or USB port up to an input
voltage of 6.5V. It requires just one external component.
The AAT3684 precisely regulates battery charge voltage
and current for 4.2V (4.375V option) lithium-ion/poly-
mer battery cells. When charged from an AC adapter or
USB port, the battery charging current 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-cir-
cuit, or over-temperature failure, the device will auto-
matically shut down, thus protecting the charging device,
control system, and the battery under charge. A status
monitor output pin is provided to indicate the battery
charge status by directly driving an external LED.
The AAT3684 is available in a Pb-free, thermally
enhanced, space-saving 10-pin 2.2x2.2mm STDFN pack-
age and is specified for operation over the -40°C to
+85°C temperature range.
Features
• USB or AC Adapter System Power Charger
Programmable from 15mA to 500mA
• 4.0V ~ 6.5V 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
(AAT3684-1 is No Trickle Charge Option)
• Over-Voltage and Emergency Thermal Protection
• Power On Reset and Soft Start
• LED Status Pin
• STDFN2.2x2.2-10 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
Typical Application
Adapter/USB Input
Enable
RSET
ADP
BAT
AAT3684
STAT
EN
ISET
GND
BATT+
C
BATT-
Battery
Pack
3684.2007.12.1.2
www.analogictech.com
1




Advanced Analogic Technologies

AAT3684 Datasheet Preview

AAT3684 Datasheet

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

No Preview Available !

BatteryManagerTM
PRODUCT DATASHEET
AAT3684
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Pin Description
Pin #
Symbol
www.datasheet4u.com
1, 2, 3, 7
N/C
4 STAT
5 GND
6 ADP
8 BAT
9 ISET
10 EN
EP
Type
Out
Power
Power In
In/Out
In/Out
In
Function
Not connected.
Open drain status pin.
Ground connection.
Input from USB/adapter charger.
Battery charging and sensing.
Connect resistor here to set the charge current.
Enable pin. Logic high enables the IC (internally pulled down).
Exposed paddle (bottom): connect to ground as closely as possible to the device.
Pin Configuration
STDFN2.2x2.2-10
(Top View)
N/C
N/C
N/C
STAT
GND
1
2
3
4
5
10 EN
9 ISET
8 BAT
7 N/C
6 ADP
2
www.analogictech.com
3684.2007.12.1.2



Part Number AAT3684
Description 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Maker Advanced Analogic Technologies
Total Page 17 Pages
PDF Download

AAT3684 Datasheet PDF





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