AAT3672 Datasheet, PDF (1/27 Pages) Skyworks Solutions Inc. – 1.6A Dynamic Battery Charger and Power Manager

DATA SHEET
AAT3672
1.6A Dynamic Battery Charger and Power Manager
General Description
The AAT3672 BatteryManager is a highly integrated sin-
gle-cell (4.2V) lithium-ion/polymer battery charger and
system power management IC that enables simultane-
ous battery charging and system load management.
The AAT3672 provides charging current and system
power management from a single input that may be sup-
plied by an AC adapter or USB port power source. This
device allows the user to program the battery charge
current up to 1.6A depending on the current shared with
the system output. A battery charge timeout timer is
provided for charging safety and the charge termination
current is also user-programmable.
The AAT3672 employs a battery charge current reduc-
tion function that enables continued system operation in
the event the input source can not supply the required
load current. When operated under excessive thermal
conditions, the AAT3672 has a digitally controlled ther-
mal loop which allows the maximum possible charging
current for any given ambient temperature condition.
Battery temperature, voltage and charge state are mon-
itored for fault conditions. The AAT3672-1/-2 has two
status monitor output pins (STAT1 and STAT2), and the
AAT3672-3 has one status monitor output (STAT1) pro-
vided to indicate battery charge status by directly driving
external LEDs.
The AAT3672 is available in a Pb-free, thermally
enhanced, space-saving 14-pin 3 × 3mm TDFN package.
Features
• System Load Power Control from Either ADP or
Battery
• ADP Presence Automatically Routes Power from
Source to Load and Charges Battery
• Automatic Charge Reduction Loop to Minimize
Charge Time
• Digitally Controlled Thermal Protection
• Battery Power Enable
• Programmable Battery Charge Timer
• Battery Cell Temperature Sensing
• Charge Status Reporting (LEDs)
• Automatic Recharge Sequencing
• Battery Over-Voltage, Over-Current, and
Over-Temperature Protection
• System Load Current Limiting
• 14-pin 3 × 3mm TDFN Package
Applications
• Cellular Phones
• Digital Still Cameras
• Digital Video Cameras
• Global Positioning Systems (GPS)
• MP3 Players
• Handheld PCs
Typical Application
Adapter Input
Enable
CADP
10μF
Enable Input to Output
Enable Battery to Output
STAT1
STAT2
OUT
BAT
System Load
BAT+
ADP
AAT3672-1/-2
EN
ADP
CBAT
10μF
10kΩ
Temp
ENO
TS
ENBAT
CHRADP
CHR Threshold
Battery
Pack
ADPSET
CT
TERM
RSET
RTERM
GND
CT
Adapter Input
Enable 1
Enable 2
CADP
10μF
Enable Input to Output
Enable Battery to Output
STAT1
ADP
OUT
BAT
AAT3672-3
EN1
EN2
ENO
TS
ENBAT
CHRADP
System Load
BAT +
ADP
CBAT
10μF
10kΩ
Temp
Battery
CHR Threshold _Pack
ADPSET
CT
TERM
RSET
RTERM
GND
CT
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201880B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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