AAT3673 Datasheet, PDF (1/28 Pages) Skyworks Solutions Inc. – 1.6A Dynamic Battery Charger and Power Manager

DATA SHEET
AAT3673
1.6A Dynamic Battery Charger and Power Manager
General Description
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.
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.
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.
The AAT3673 is available in a Pb-free, thermally
enhanced, space-saving 16-pin 4 × 4mm TDFN package.
Typical Application
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 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
• 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
• Handheld PCs
System Load
Adapter Input
STAT1
OUT
STAT2
BAT
ADP
BYP
CADP
10μF _{AAT3673-1/-2/-4/-5}
BAT+
CBAT
10μF
Enable
Enable Input to Output
Enable Battery to Out
EN
ENO
ENBAT
TS
CHRADP
10kΩ
Temp
Battery
CHR Threshold Pack
ADPSET
CT
RADP
TERM
RTERM
GND
BYP
CBYP
CT
Adapter Input
EN1
EN2
CADP
10μF
Enable Input to Output
Enable Battery to Out
STAT1
ADP
OUT
BAT
System Load
BAT+
AAT3673-3/-6 BYP
CBAT
10μF
EN1
EN2
ENO
TS
ENBAT CHRADP
10kΩ
Temp
Battery
CHR Threshold _Pack
ADPSET
CT
RADP
TERM
RTERM
GND
BYP
CBYP
CT
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201881B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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