1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
General Description
The AAT3663 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 oper-
ate from USB ports or an AC adapter inputs up to an
input voltage of 13.2V.
AAT3663 precisely regulates battery charge voltage and
current for 4.2V and 8.4V Li-Ion battery cells. The bat-
tery charging current is user programmed 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 opti-
mum 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 con-
dition, the device will automatically shut down, thus pro-
tecting the charger and the battery under charge.
Two status monitor output pins are provided to indicate
the battery charge status by directly driving external
LEDs. Additionally, an open-drain power-source detec-
tion 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 tem-
perature range.
Applications
•
•
•
•
•
•
Digital Still Cameras
Global Positioning Systems (GPS)
Point Of Service (POS) Terminals
Portable DVD Players
Portable Media Players (PMP)
Two Way Radios
Typical Application
ON/OFF
EN BATS
V
IN
IN
BAT
BATT+
10μF
-
BATT-
TEMP
STAT1
STAT2
ADPP#
GND
TS
TERM
ISET
CT
C
T
R
SET
R
TERM
Battery
Pack
AAT3663
3663.2008.01.1.2
www.analogictech.com
1
PRODUCT DATASHEET
AAT3663
BatteryManager
TM
Pin Description
Pin #
1
2
3
4
5
6
7
8, 9
10
11
12
13
14
1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications
Symbol
EN
CT
ISET
GND
TS
BATS
BAT
IN
STAT1
STAT2
ADPP#
TERM
N/C
Type
I
I
I
I/O
I/O
I
O
I
O
O
O
I
Function
Enable pin, Active high with internal pull-down. If not used, pull high to the IN pin to continuously
enable the charger IC when input power is applied.
Charge timer programming pin. A 0.1μF ceramic capacitor should be connected between this pin
and GND. Connect directly to GND to disable the timer function.
Charge current programming pin. Connect a resistor between this pin and GND to program the con-
stant fast charge current.
IC ground connection. Connect this pin to power ground.
Battery temperature sense input. Connect the Li-Ion battery pack NTC resistor terminal to this pin.
Battery voltage sense pin. Connect this pin directly to the positive battery terminal. If this function
is not used, connect to the BAT pin directly.
Battery charge output pin. Connect to the positive battery terminal.
Power supply input pin. Connect the input USB port or Adapter power source to this pin
Charge status pin, open-drain output. Connect the STAT1 LED with a series ballast resistor between
IN and this pin.
Charge status pin, open-drain output. Connect the STAT2 LED with a series ballast resistor between
IN and this pin.
Input supply power-good status pin, open-drain output. Connect the ADPP# status LED with a series
ballast resistor between IN and this pin.
Charge termination current programming input pin. Connect a resistor between this pin and GND
to program the charge termination current. When TERM is open, the termination current is 10%
(default sertting) of the set maximum charge current.
No connection.
Pin Configuration
TDFN33-14
(Top View)
EN
CT
ISET
GND
TS
BATS
BAT
1
2
3
4
5
6
7
14
13
12
11
10
9
8
N/C
TERM
ADPP#
STAT2
STAT1
IN
IN
2
www.analogictech.com
3663.2008.01.1.2
PRODUCT DATASHEET
AAT3663
BatteryManager
TM
1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications
Absolute Maximum Ratings
1
Symbol
V
IN
V
N
V
N
T
J
T
LEAD
Description
IN Continuous Voltage
STAT1, STAT2, ADPP#, EN, BAT, BATS
TS, CT, TERM, ISET
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads)
Value
-0.3 to 14
-0.3 to V
IN
+ 0.3
-0.3 to 5.5
-40 to 150
300
Units
V
V
V
°C
°C
Thermal Information
2
Symbol
θ
JA
P
D
Description
Maximum Thermal Resistance (TDFN3x3)
Maximum Power Dissipation
Value
50
2
Units
°C/W
W
AAT3663 Feature Options
Product
AAT3663-4.2-1
AAT3663-4.2-2
AAT3663-8.4-1
AAT3663-8.4-2
Number of Battery Cells
Single
Single
Dual
Dual
Battery Temperature Sense
For Use With Any NTC Thermistor
For Use With 10kΩ NTC Thermistor
For Use With Any NTC Thermistor
For Use With 10kΩ NTC Thermistor
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
2. Mounted on a FR4 board.
3663.2008.01.1.2
www.analogictech.com
3
PRODUCT DATASHEET
AAT3663
BatteryManager
TM
1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications
Electrical Characteristics
V
IN
= 5V, T
A
= -40 to +85°C; Unless otherwise noted, typical values are at T
A
= 25°C.
Symbol
Description
Conditions
Min
4.0
3
150
V
IN
> V
UVLO
Charge Current = 100mA
V
BAT
= 4.25V, EN = GND
V
BAT
= 4V, IN = Open
V
EN
= 5V
AAT3663-4.2
AAT3663-8.4
4.158
8.316
50
0.35
0.4
0.4
0.6
4.2
8.4
0.5
AAT3663-4.2
AAT3663-8.4
AAT3663-4.2
AAT3663-8.4
2.5
5.0
2.6
5.2
V
BAT_EOC
- 0.1
V
BAT_EOC
- 0.2
2.7
5.4
100
1
1
2
Typ
Max
13.2
4
Units
V
V
mV
mV
mA
μA
μA
μA
V
%
V
V
Operation
Input Voltage Range
V
IN
Under Voltage Lockout Threshold
V
UVLO
UVLO Hysteresis
Adapter Present Indicator Threshold
V
ADPP_TH
Voltage, V
IN
– V
BAT
I
OP
Operating Current
I
SHUTDOWN
Shutdown Current
I
LEAKAGE
Leakage Current from BAT Pin
EN
LEAKAGE
EN Pin Leakage
Voltage Regulation
V
BAT_EOC
ΔV
BAT_EOC
/
V
BAT_EOC
V
MIN
V
RCH
End of Charge Voltage Regulation
End of Charge Voltage Accuracy
Preconditioning Voltage Threshold
Battery Recharge Voltage Threshold
Rising Edge
4.242
8.484
Current Regulation
Charge Current Programmable Range
I
CC_RANGE
Constant-Current Mode Charge
I
CH_CC
Current
V
ISET
ISET Pin Voltage
K
ISET
Charge Current Set Factor: I
CH_CC
/I
SET
V
TERM
TERM Pin Voltage
I
CH_TRK
Trickle-Charge Current
R
ISET
= 1.74KΩ (for 1A), V
BAT
= 3.6V
R
ISET
= 17.8KΩ (for 0.1A), V
BAT
= 3.6V
Constant Current Mode, V
BAT
= 3.6V
R
TERM
= 40kΩ
TERM pin open
R
TERM
= 13.3 kΩ, I
CH_CC
≥
800mA
V
IN
= 5V
100
900
80
I
CH_TERM
Charge Termination Current Threshold
Charging Devices
R
DS(ON)
Charging Transistor ON Resistance
Logic Control / Protection
Input High Threshold
V
EN
Input Low Threshold
Output Low Voltage
V
STAT
STAT Pin Current Sink Capability
I
STAT
5
5
8
1000
100
2
900
0.6
10
10
10
330
1000
1100
120
mA
mA
V
V
% I
CH_CC
% I
CH_CC
% I
CH_CC
mΩ
V
V
mA
15
15
12
500
1.6
STAT Pin Sinks 4mA
0.4
0.4
8
4
www.analogictech.com
3663.2008.01.1.2
PRODUCT DATASHEET
AAT3663
BatteryManager
TM
1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications
Electrical Characteristics
V
IN
= 5V, T
A
= -40 to +85°C; Unless otherwise noted, typical values are at T
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