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PDF AAT3683 Data sheet ( Hoja de datos )
| Número de pieza | AAT3683 | |
| Descripción | 1A Linear Li-Ion Battery Charger | |
| Fabricantes | Skyworks | |
| Logotipo |  |
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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
1 page  
DATA SHEET
AAT3683
1A Linear Li-Ion Battery Charger
Electrical Characteristics
VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol Description
Logic Control / Protection
VEN(H)
VEN(L)
VSTAT
ISTAT
VADDP#
IADPP#
VOVP
IOCP
TK
Input High Threshold
Input Low Threshold
Output Low Voltage
STAT Pin Current Sink Capability
Output Low Voltage
ADDP# Pin Current Sink Capability
Over-Voltage Protection Threshold
Over-Current Protection Threshold
Trickle Timeout
TC Trickle and Constant Current Mode Timeout
TV Constant Voltage Mode Timeout
ITS Current Source from TS Pin
TS1 TS Hot Temperature Fault
TS2
VTS1
VTS2
TLOOP_IN
TLOOP_OUT
TREG
TSHDN
TS Cold Temperature Fault
High Temperature Threshold
Low Temperature Threshold
Thermal Loop Entering Threshold
Thermal Loop Exiting Threshold
Thermal Loop Regulation
Over-Temperature Shutdown
Conditions
STAT Pin Sinks 4mA
ADPP# Pin Sinks 4mA
CT = 0.1μF, VIN = 5V
AAT3683-2 Only
Threshold, AAT3683-2 Only
Hysteresis, AAT3683-2 Only
Threshold, AAT3683-2 Only
Hysteresis, AAT3683-2 Only
AAT3683-4 Only
Threshold
Hysteresis
Min
1.6
69
316
2.30
29.1
58.2
Typ
4.4
105
25
3
75
331
25
2.39
25
30
60
115
85
100
140
15
Max
0.4
0.2
8
0.2
8
81
346
2.48
30.9
61.8
Units
V
mA
V
mA
V
%ICH_CC
Minute
Hour
μA
mV
V
mV
%VIN
ºC
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
5
5 Page 
The digital thermal loop control is dynamic in the sense
that it will continue to adjust the battery charging cur-
rent as operating conditions change.
The digital thermal loop will reset and resume normal
operation when the power dissipation or over-tempera-
ture conditions are removed.
Battery Charging Operation
Figure 1 illustrates the entire battery charging profile or
operation, which consists of three phases:
1. Preconditioning (Trickle) Charge
2. Constant Current Charge
3. Constant Voltage Charge
Battery Preconditioning
Battery charging commences only after the AAT3683
checks several conditions in order to maintain a safe
charging environment. The input supply must be above
the minimum operating voltage (VUVLO) and the enable
pin must be high. When the battery is connected to the
BAT pin, the AAT3683 checks the condition of the bat-
tery and determines which charging mode to apply. If
the battery voltage is below the preconditioning voltage
threshold, VMIN, then the AAT3683 begins precondition-
ing the battery cell (trickle charging) by charging at
DATA SHEET
AAT3683
1A Linear Li-Ion Battery Charger
10% of the programmed constant current. For example,
if the programmed current is 500mA, then the precon-
ditioning mode (trickle charge) current is 50mA. Battery
cell preconditioning (trickle charging) is a safety precau-
tion for deeply discharged cells and will also reduce the
power dissipation in the internal series pass MOSFET
when the input-output voltage differential is at the
greatest potential.
Constant Current Charging
Battery cell preconditioning continues until the battery
voltage reaches the preconditioning voltage threshold,
VMIN. At this point, the AAT3683 begins constant current
charging. The current level for this mode is programmed
using a single resistor from the ISET pin to ground.
Programmed current can be set at a minimum 100mA up
to a maximum of 1A.
Constant Voltage Charging
Constant current charging will continue until such time
that the battery voltage reaches the voltage regulation
point, VBAT_EOC. When the battery voltage reaches VBAT_EOC,
the AAT3683 will transition to constant voltage mode.
The regulation voltage is factory programmed to a nom-
inal 4.2V and will continue charging until the charge
termination current is reached.
Charge Complete Voltage
Regulated Current
Preconditioning
Trickle Charge
Phase
Constant Current
Charge Phase
I = Max CC
Constant Voltage
Charge Phase
Constant Current Mode
Voltage Threshold
Trickle Charge and I = CC / 10
Termination Threshold
Figure 1: Current vs. Voltage Profile During Charging Phases.
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
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AAT3683.PDF ] | |
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