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PDF AAT3683 Data sheet ( Hoja de datos )
| Número de pieza | AAT3683 | |
| Descripción | 1A Linear Li-Ion Battery Charger | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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General Description
The AAT3683 BatteryManager is a highly integrat-
www.datasheeedt4sui.ncogmle-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 6.5V.
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 maxi-
mum possible battery charging current for the given
set of input to output power dissipation and ambi-
ent temperature 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 charging device, control sys-
tem, and the battery under charge. A status mon-
itor output pin is provided to indicate the battery
charge status by directly driving an external LED.
An open-drain power source detection output is
provided to report the power supply status.
The AAT3683 is available in the Pb-free, thermally-
enhanced, space-saving 2.2x2.2mm 10-pin STDFN
(AAT3683-2 and -3) and 16-pin QFN33 (AAT3683-4)
packages and is specified for operation over the
-40°C to +85°C temperature range.
Typical Application
AAT3683
1A Linear Li-Ion Battery Charger
BatteryManager™
Features
• USB or AC Adapter Input
• Programmable from 100mA to 1A
• 4.0V to 6.5V 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
• 2.2x2.2mm STDFN-10 (AAT3863-2 and -3)
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
AAT3683-2
STAT
ADPP#
CT
GND
TS
ISET
RTERM
RSET
BATT+
CBAT
BATT-
TEMP
Battery
Pack
ENABLE
VIN
CIN
CT
EN
IN BAT
TERM
AAT3683-4
STAT 1
STAT 2
CT
GND
TS
ISET
RT
RTERM
RSET
BATT+
CBAT
BATT-
TEMP
Battery
Pack
3683.2007.06.1.0
1
1 page  
AAT3683
1A Linear Li-Ion Battery Charger
Electrical Characteristics
VIN = 5V, TA = -25°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
www.datasheet4u.com
Symbol Description
Conditions
Min Typ
Charging Devices
RDS(ON)
Charging Transistor On Resistance
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
VIN = 5V
0.5
1.6
STAT Pin Sinks 4mA
ADPP# Pin Sinks 4mA
CT = 0.1µF, VIN = 5V
CT = 0.1µF, VIN = 5V
CT = 0.1µF, VIN = 5V
AAT3683-2 Only
Threshold, AAT3683-2 Only
Hysteresis, AAT3683-2 Only
Threshold, AAT3683-2 Only
Hysteresis, AAT3683-2 Only
AAT3683-3, AAT3683-4 Only
AAT3683-3, AAT3683-4 Only
69
316
2.30
29.1
58.2
Threshold
Hysteresis
4.4
105
25
3
3
75
331
25
2.39
25
30
60
115
85
100
140
15
Max
0.7
0.4
0.2
8
0.2
8
81
346
2.48
30.9
61.8
Units
Ω
V
V
V
mA
V
mA
V
%ICH_CC
Minute
Hour
Hour
µA
mV
V
mV
%VIN
%VIN
ºC
ºC
ºC
ºC
3683.2007.06.1.0
5
5 Page 
AAT3683
1A Linear Li-Ion Battery Charger
tally controlled thermal loop system that will reduce
the charging current to prevent the device from
thermal shutdown. The digital thermal loop will
www.datashmeeat4inu.tcaoimn the maximum possible battery charging
current for the given set of input to output power
dissipation and ambient temperature conditions.
The digital thermal loop control is dynamic in the
sense that it will continue to adjust the battery
charging current as operating conditions change.
The digital thermal loop will reset and resume nor-
mal operation when the power dissipation or over-
temperature conditions are removed.
Battery Charging Operation
Figure 1 illustrates the entire battery charging pro-
file 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 volt-
age (VUVLO) and the enable pin must be high.
When the battery is connected to the BAT pin, the
AAT3683 checks the condition of the battery and
determines which charging mode to apply. If the
battery voltage is below the preconditioning voltage
threshold, VMIN, then the AAT3683 begins precon-
ditioning the battery cell (trickle charging) by charg-
ing at 10% of the programmed constant current.
For example, if the programmed current is 500mA,
then the preconditioning mode (trickle charge) cur-
rent is 50mA. Battery cell preconditioning (trickle
charging) is a safety precaution for deeply dis-
charged cells and will also reduce the power dissi-
pation in the internal series pass MOSFET when
the input-output voltage differential is at the great-
est potential.
Constant Current Charging
Battery cell preconditioning continues until the bat-
tery 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 volt-
age reaches VBAT_EOC, the AAT3683 will transition
to constant voltage mode. The regulation voltage is
factory programmed to a nominal 4.2V and will
continue charging until the charge termination cur-
rent 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.
3683.2007.06.1.0
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AAT3683.PDF ] | |
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