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PDF AAT3663 Data sheet ( Hoja de datos )
| Número de pieza | AAT3663 | |
| Descripción | 1A Linear Li-Ion Battery Charger | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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AAT3663
1A Linear Li-Ion Battery Charger
for Single and Dual Cell Applications
General Description
BatteryManager™
Features
www.datasheTeht4eu.AcoAmT3663 BatteryManager™ is a member of
AnalogicTech’s Total Power Management IC™
family. This device is an integrated single/dual cell
Lithium-Ion (Li-Ion) / polymer battery charger IC
designed to operate from USB ports or an AC
adapter inputs up to an input voltage of 13.2V.
AAT3663 precisely regulates battery charge volt-
age and current for 4.2V and 8.4V Li-Ion battery
cells. The battery charging current is user pro-
grammed up to 1A by an external resistor.
Battery charge state is continuously monitored for
fault conditions. A Digital Thermal Loop Control
maintains the maximum possible battery charging
current for the optimum set of input to output power
dissipation and ambient temperature conditions. In
the event of an over-current, over-voltage, short-
circuit, or over-temperature fault condition, the
device will automatically shut down, thus protecting
the charger and the battery under charge.
Two status monitor output pins are provided to indi-
cate the battery charge status by directly driving
external LEDs. Additionally, an open-drain power-
source detection output (ADPP#) is provided to
report presence of an input power supply
The AAT3663 is available in a thermally enhanced,
space-saving, 14-pin 3x3 mm TDFN package and
is specified for operation over the -40°C to +85°C
temperature range.
Typical Application
• 4.0V ~ 13.2V Input Voltage Range
• Compatible with USB or AC Adapter Sources
• Programmable Fast Charge Current from
100mA to 1A
• Programmable Charge Termination Current
• Digital Thermal Loop Charge Reduction
• Less Than 0.4µA Battery Leakage Current
• Programming Charge Timer
• Battery Temperature Sensing
• Battery Temp Sense Open Circuit Detection
• Automatic Recharge Sequencing
• Automatic Trickle Charge for Battery
Pre-Conditioning
• Automatic Charge Termination
Shutdown/Sleep Mode
• Less than 1µA Shutdown Current
• Over-Voltage and Over-Current Protection
• Power On Reset and Soft Start
• 3x3mm 14-pin TDFN Package
Applications
• Bluetooth™ Headset
• Cell Phones
• Digital Still Cameras
• MP3 Players
• Personal Data Assistants (PDAs)
• Other Li-Ion Battery Powered Devices
ON/OFF
VIN
EN BATS
IN BAT
AAT3663
10μF
BATT +
BATT-
STAT1
TS
STAT2
TERM
ADPP#
ISET
GND CT
TEMP
CT
RSET
RTERM
Battery
Pack
3663.2007.10.1.0
1
1 page  
AAT3663
1A Linear Li-Ion Battery Charger
for Single and Dual Cell Applications
Electrical Characteristics
VIN = 5V, TA = -25 to +85°C; Unless otherwise noted, typical values are at TA = 25°C
www.datasheet4u.com
Symbol Description
Conditions
Min
Logic Control / Protection
VADDP#
IADPP#
Output Low Voltage
ADDP# Current Sink Capability
VOVP
Over-Voltage Protection Threshold
VOCP
TK
TC
TV
ITS
Over-Current Protection Threshold
Trickle Charging Time-Out
Trickle and Constant Current
Mode Time-Out
Constant Voltage Mode Time-Out
Current Source from TS Pin
TS1 TS Hot Temperature Fault
TS2 TS Cold Temperature Fault
VTS1
High Temperature Threshold
VTS2
Low Temperature Threshold
TLOOP_IN
TLOOP_OUT
TREG
Digital Thermal Loop Entering
Threshold
Digital Thermal Loop Exiting
Threshold
Digital Thermal Loop Regulation
TSHDN Over-Temperature Shutdown
ADPP# Pin Sinks 4mA
AAT3663-4.2
AAT3663-8.4
CT = 100nF, VIN = 5V
CT = 100nF, VIN = 5V
CT = 100nF, VIN = 5V
AAT3663-2 Only
Threshold, AAT3663-2 Only
Hysteresis, AAT3663-2 Only
Threshold, AAT3663-2 Only
Hysteresis, AAT3663-2 Only
Threshold, AAT3663-1 Only
Hysteresis, AAT3663-1 Only
Threshold, AAT3663-1 Only
Hysteresis, AAT3663-1 Only
71
316
2.30
29.1
58.2
Threshold
Hysteresis
Typ
4.4
8.8
105
TC/8
3
3
75
331
25
2.39
25
30
2
60
2
115
85
100
140
15
Max
0.4
8
79
346
2.48
30.9
61.8
Units
V
mA
V
%VCS
Hour
Hour
Hour
µA
mV
mV
%VIN
%VIN
ºC
ºC
ºC
ºC
3663.2007.10.1.0
5
5 Page 
AAT3663
1A Linear Li-Ion Battery Charger
for Single and Dual Cell Applications
indicate the presence of power on the input supply pin.
This open drain MOSFET switch may be used to either
power a display LED or to alert a system microcon-
www.datashtereotl4leur.cfoomr the presence on input power.
Battery Charging Operation
Figure 1 illustrates the entire battery charging profile
and operation, which consists of three phases:
1. Preconditioning (Trickle) Charge
2. Constant Current Charge
3. Constant Voltage Charge
When power is initially applied or when a battery pack
is connected to the BAT pin, battery charging com-
mences after the AAT3663 checks several conditions
in order to maintain a safe charging environment. The
input supply must be above the minimum operating
voltage (UVLO) and the enable pin must be high (inter-
nally pulled down). When the battery is connected to
the BAT pin the AAT3663 checks the condition of the
battery and determines which charging mode to apply.
Battery Preconditioning
If the battery voltage is below VMIN, the AAT3663 begins
battery trickle charging by charging at 10% of the pro-
grammed constant-current. For example, if the pro-
grammed current is 500mA, then the trickle charge cur-
rent is 50mA. Trickle charging is a recommended safe-
ty precaution for a deeply discharged cell and maxi-
mizes the charge cycle life of the battery. In addition,
charger IC power dissipation for the internal series pass
MOSFET is minimized when the input-output voltage
differential is at its highest. This in turn allows the
charging operation to commence over wider thermal
and input to output voltage differential conditions.
Constant Current Charging
Trickle charging continues until the battery voltage
reaches the VMIN threshold. At this point, the AAT3663
begins constant-current fast charging. The current
level for this mode is programmed using a single resis-
tor from the ISET pin to ground. Programmed current
can be set at a minimum 100mA up to a maximum 1A.
Constant Voltage Charging
Constant current charging continues until such time
that the battery voltage reaches the voltage regulation
point VBAT_REG. When the battery voltage reaches
VBAT_REG, the AAT3663 will transition to the constant-
voltage mode. The regulation voltage is factory pro-
grammed to a nominal 4.2V for the AAT3663-4.2
option and to 8.4V for the AAT3663-8.4 option. Under
default conditions with the TERM pin not connected
(open circuit), constant voltage charging will continue
until the charge current has reduced to 10% of the pro-
grammed current. Placing a resistor between the
TERM pin and ground allows the user to program a
desired termination current.
After the charge cycle is complete, the AAT3663 turns
off the series pass device and automatically goes into
a power saving sleep mode. During this time the series
pass device will block current in both directions there-
fore preventing the battery discharging through the IC.
The AAT3663 will remain in sleep mode, until either the
battery terminal voltage drops below the VRCH thresh-
old, the charger EN pin is recycled or the charging
power source is reconnected. In all cases the
AAT3663 will monitor all battery parameters and
resume charging in the appropriate mode.
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 and Voltage Profile During Charging Phases.
3663.2007.10.1.0
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AAT3663.PDF ] | |
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