DATA SHEET
AAT3673
1.6A Dynamic Battery Charger and Power Manager
General Description
Features
The AAT3673 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. For
increased safety, the AAT3673 includes over-voltage
input protection (OVP) up to 28V.
• 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 with USB Input
• 4.0V~6.5V Input Voltage Range
• Over-Voltage Input Protection (OVP) up to 28V
• 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
The AAT3673 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 (ADP).
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 ter-
mination current is also user-programmable.
The AAT3673 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 AAT3673 has a digitally controlled ther-
mal loop which allows the maximum possible charging
current for any given ambient temperature condition.
• System Load Current Limiting
• 16-pin 4 × 4mm TDFN Package
Applications
• Cellular Phones
• Digital Still Cameras
• Digital Video Cameras
• Global Positioning Systems (GPS)
• MP3 Players
Battery temperature, voltage and charge state are mon-
itored for fault conditions. The AAT3673-1/-2/-4/-5 has
two status monitor output pins (STAT1 and STAT2), and
the AAT3673-3/-6 has one status monitor output (STAT1)
provided to indicate battery charge status by directly
driving external LEDs.
• Handheld PCs
The AAT3673 is available in a Pb-free, thermally
enhanced, space-saving 16-pin 4 × 4mm TDFN package.
Typical Application
System Load
System Load
OUT
OUT
STAT1
STAT1
BAT+
Adapter Input
BAT+
STAT2
BAT
ADP
BAT
AAT3673-3/-6
CADP
10μF
Adapter Input
CBAT
10μF
ADP
BYP
CBAT
10μF
BYP
CADP
10μF
EN1
EN2
AAT3673-1/-2/-4/-5
EN1
EN2
10kΩ
10kΩ
Enable
EN
Temp
Temp
Enable Input to Output
Enable Battery to Out
Enable Input to Output
Enable Battery to Out
TS
TS
ENO
ENO
Battery
Pack
Battery
Pack
CHR Threshold
CHR Threshold
ENBAT
CHRADP
ENBAT
CHRADP
CT
ADPSET
CT
ADPSET
TERM
BYP
TERM
BYP
GND
GND
RADP
CT
RADP
RTERM
CBYP
RTERM
CBYP
CT
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
1
201881B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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