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AAT3683 Schematic ( PDF Datasheet ) - Skyworks

Teilenummer AAT3683
Beschreibung 1A Linear Li-Ion Battery Charger
Hersteller Skyworks
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Gesamt 22 Seiten
AAT3683 Datasheet, Funktion
General Description
The AAT3683 BatteryManager is a highly integrated sin-
gle-cell lithium-ion / polymer (Li-Ion) battery charger
that operates from a USB port or an AC adapter input up
to an input voltage of 7.5V.
The AAT3683 precisely regulates battery charge voltage
and current for 4.2V Li-Ion battery cells. The battery
charging current can be set by an external resistor up to
1A.
Digital Thermal Loop Control maintains the maximum
possible battery charging current for the given set of
input to output power dissipation and ambient tempera-
ture conditions.
Battery charge state is continuously monitored for fault
conditions. In the event of an over-current, over-voltage,
short-circuit, or over-temperature condition, the device
will shut down automatically, thus protecting the charg-
ing device, control system, and the battery under
charge. A status monitor output pin is provided to indi-
cate the battery charge status by directly driving an
external LED. An open-drain power source detection out-
put is provided to report the power supply status.
The AAT3683 is available in the Pb-free, thermally-
enhanced, space-saving 2.2 x 2.2mm 10-pin STDFN
(AAT3683-2) and 16-pin QFN33 (AAT3683-4) packages
and is specified for operation over the -40°C to +85°C
temperature range.
Typical Application
ENABLE
VIN
CIN
CT
EN
IN BAT
TERM
AAT3683 - 2
STAT
ADPP#
CT
GND
TS
ISET
RTERM
RSET
BATT+
CBAT
BATT-
TEMP
Battery
Pack
DATA SHEET
AAT3683
1A Linear Li-Ion Battery Charger
Features
• USB or AC Adapter Input
• Programmable from 100mA to 1A
• 4.0V to 7.5V Input Voltage Range
• High Level of Integration with Internal:
Charging Device
Reverse Blocking Diode
Current Sensing
• Digital Thermal Regulation
• Charge Current Programming (ISET)
• Charge Termination Current Programming (TERM)
• Charge Timer (CT)
• Battery Temperature Sensing (TS)
• TS Pin Open Detection
• Automatic Recharge Sequencing
• Automatic Trickle Charge for Battery Pre-Conditioning
(no trickle charge option available)
• Full Battery Charge Auto Turn-Off / Sleep Mode /
Charge Termination
• 1μA Max. Shutdown Current
• Over-Voltage and Over-Current Protection
• Emergency Thermal Protection
• Power On Reset and Soft Start
• 2.2 x 2.2mm STDFN-10 (AAT3863-2) and QFN33-16
(AAT3683-4) Packages
Applications
• Bluetooth Headsets, Headphones, Accessories
• Cellular Phones
• Digital Still Cameras
• MP3, Portable Music, and Portable Media Players
• Personal Data Assistants (PDAs) and Handheld
Computers
• Other Li-Ion Battery-Powered Devices
ENABLE
VIN
CIN
CT
EN
IN BAT
TERM
AAT3683-4
STAT1
STAT2
CT
GND
TS
ISET
RT
RTERM
RSET
BATT+
CBAT
BATT-
TEMP
Battery
Pack
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201885B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
1






AAT3683 Datasheet, Funktion
Typical Characteristics
Constant Charging Current
vs. Set Resistor Values
10000
1000
100
10
1
10
RSET (kΩ)
100
End of Charge Regulation Accuracy
vs. Input Voltage
(VBAT_EOC = 4.2V)
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
-0.15
-0.20
4.5 5.0 5.5 6.0 6.5 7.0
7.5
Input Voltage (V)
Preconditioning Charge Current
vs. Input Voltage
120
100 RSET = 1.58k
80 RSET = 2k
60 RSET = 3.24k
40
20 RSET = 8.06k
0
4 4.5 5 5.5 6 6.5 7
Input Voltage (V)
7.5
DATA SHEET
AAT3683
1A Linear Li-Ion Battery Charger
Charging Current vs. Battery Voltage
1200
1000
800
RSET = 1.58k
RSET = 2k
600 RSET = 3.24k
400
RSET = 8.06k
200
0
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
VBAT (V)
End of Charge Voltage vs. Temperature
4.220
4.210
4.200
4.190
4.180
-50
-25
0 25 50
Temperature (°C)
75 100
Preconditioning Voltage Threshold
vs. Temperature
2.7
2.65
2.6
2.55
2.5
2.45
2.4
-40 -15
10
35
60
Temperature (°C)
85
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
6 201885B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012

6 Page









AAT3683 pdf, datenblatt
System Operation Flow Chart
DATA SHEET
AAT3683
1A Linear Li-Ion Battery Charger
Enable
Power On Reset
No
Yes
Shut Down
No
Recharge Test
VRCH > VBAT
Power Input
Voltage
VIN > VUVLO
Enable
Yes
Yes
Fault
Conditions Monitoring
OV, OT,
TS>VTS2 or TS<VTS1
No
Expired
Preconditioning
Test
VMIN > VBAT
No
Yes
Preconditioning
(Trickle Charge)
Yes
Current Phase Test
VIN > VBAT_EOC
Yes
Constant
Current Charge
Mode
No
Voltage Phase Test
IBAT > ITERM
Yes
Constant
Voltage Charge
Mode
No
Charge Completed
Charge Timer
Control
ThTerhmeraml Laol oLpoop
CuCrruernret nt
RReedduuccttioionnininADP
CCh.Ca.rgMinogdeMode
Yes
No
Device Thermal
Loop Monitor
TJ > 115°C
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
12 201885B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012

12 Page





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