DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
General Description
The AAT3682 is a lithium-ion/polymer linear battery
charger. It is designed for compact portable applications
with a single-cell battery. The AAT3682 precisely regu-
lates battery charge voltage and charge current, and
offers an integrated pass device, minimizing the number
of external components required.
The AAT3682 charges the battery in three different
phases: preconditioning, constant current, and constant
voltage. In preconditioning mode, the charge current has
two different levels and is controlled by one external pin.
Battery charge temperature and charge state are care-
fully monitored for fault conditions. A battery charge
stable monitor output pin is provided to indicate the bat-
tery charge status through a display LED or interface to
a system controller. The AAT3682 has a sleep mode
option for when the input supply is removed. In this
mode, it draws only 2.0μA of typical current.
The AAT3682 is available in a Pb-free, 16-pin QFN44
package and is specified over the -20°C to +70°C tem-
perature range.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
V
IN
Range: 4.7V to 6.0V
Low Quiescent Current, Typically 0.5mA
1% Accurate Preset Voltage
Up to 1A of Charging Current
Integrated Pass Device
Battery Temperature Monitoring
Fast Trickle Charge Option
Deep Discharge Cell Conditioning
LED Charge Status Output or System Microcontroller
Serial Interface
Power-On Reset
Lower Power Sleep Mode
Status Outputs for LED or System Interface Indicates
Charge and Fault Conditions
Temperature Range: -20°C to +70°C
16-Pin QFN44 Package
Applications
•
•
•
•
•
Cellular Telephones
Digital Still Cameras
Hand-Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Typical Application
Adapter
R
SENSE
R
3
VP
Gate
R
4
BAT
T2X
VP
BATT+
C
OUT
= 1μF
DRV
CSI
VCC
C
IN
= 10μF
BSENSE
R
T1
BATT-
TS
STAT
VSS
LED 1
TEMP
R
2
= 1K
R
T2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
1
DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
Pin Descriptions
Pin #
1
2, 3, 8, 12
4
5
6
7
9
10
11
13
14
15
16
EP
Symbol
TS
N/C
STAT
VSS
DRV
T2X
BAT
VSS
GATE
VP
CSI
BSENSE
VCC
Function
Battery temperature sense input.
Not connected.
Battery charger status output. Connect an LED in series with 2.2k from STAT to V
IN
for a visual
monitor battery charge state or connect to a microcontroller to monitor battery status. A 100k
resistor should be placed between STAT and V
IN
for this function.
Common ground connection.
Battery charge control output.
Battery trickle charge control input. Connect this pin to V
SS
to double the battery trickle charge cur-
rent. Leave this pin
fl
oating for normal trickle current (10% of full charge current). To enter micro-
controller fast-read status, pull this pin high during power up.
Battery charge control output. Current regulated output to charge the battery. For best operation, a
0.1μF ceramic capacitor should be placed between BAT and GND.
Common ground connection.
Input voltage for biasing the pass device.
Battery charge power input.
Current sense input.
Battery voltage sense input.
AAT3682 bias input power.
Exposed paddle (bottom); connect to GND directly beneath the package.
Pin Configuration
QFN44-16
(Top View)
BSENSE
15
VCC
16
VP
CSI
14
13
TS
N/C
N/C
STAT
1
2
3
4
5
6
7
8
12
11
N/C
GATE
VSS
BAT
AAT3682
10
9
2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
DRV
VSS
N/C
T2X
DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
Absolute Maximum Ratings
1
Symbol
V
IN
V
CSI
V
T2X
Bias, V
BAT
T
J
Description
V
IN
Relative to GND
CSI to GND
T2X to GND
BAT to GND
Operating Junction Temperature Range
Value
-0.3 to 6.0
-0.3 to V
CC
+ 0.3
-0.3 to 5.5
-0.3 to V
CC
+ 0.3
-40 to 85
Units
V
°C
Thermal Information
Symbol
JA
P
D
Description
Maximum Thermal Resistance
2, 3
Power Dissipation (T
A
= 25°C)
Value
50
2.0
Units
°C/W
W
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 an FR4 board.
3. Derate 20mW/°C above 25°C.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
3
DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
Electrical Characteristics
1
V
IN
= 5.0V, T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
IN
I
CC
I
SLEEP
I
STAT(HI)
V
STAT(LOW)
V
CH
V
CS
I
CH
V
MIN
V
TRICKLE
T
2X
V
TS1
V
TS2
V
TERM
V
RCH
V
UVLO
V
OVP
V
OCP
Description
Operation Input Voltage
Operating Current
Sleep Mode Current
STAT High Level Output Leakage Current
STAT Low Level Sink Current
Output Charge Voltage Regulation
Charge Current Regulation
Charge Current
2
Preconditioning Voltage Threshold
Trickle Charge Current Regulation
Trickle Charge Current Gain
Low Temperature Threshold
High Temperature Threshold
Charge Termination Threshold Voltage
Battery Recharge Voltage Threshold
Under-Voltage Lockout
Over-Voltage Protection Threshold
Over-Current Protection Threshold
Conditions
5.5V, V
CH
= 4.2
3.5V, V
CH
= 4.2
5.5V
5.5V, I
SINK
= 5mA
T
A
= 25°C
V
BAT
= 4.2V
See Note 1
V
IN
= 5.5V, V
CH
= 4.2
V
IN
= 5.5V
V
CH
= 4.2V
T2X Floating; V
CH
= 4.2V
T2X = V
SS
V
IN
V
IN
V
IN
V
IN
=
=
=
=
Min
4.7
Typ
0.5
3.0
Max
6.0
3.0
6.0
+1.0
0.6
4.225
4.242
110
1.0
3.16
Units
V
mA
μA
μA
V
V
mV
A
V
mV
-1.0
4.175
4.158
90
3.04
0.3
4.20
4.20
100
3.1
10
1.8
30
60
12
4.1
4.0
4.4
200
V
CH
= 4.2V
V
IN
Rising, T
A
= 25°C
29.1
58.2
4
4.018
3.5
30.9
61.8
24
4.182
4.5
%V
CC
%V
CC
mV
V
V
V
%V
CS
1. The AAT3682 output charge voltage is specified over the 0°C to 55°C ambient temperature range; operation over -20°C to 70°C is guaranteed by design.
2. 1A of charging current is only for dynamic applications and not DC. In addition, the ambient temperature must be at or below 50°C.
4
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
Typical Characteristics
Battery Recharge Threshold Voltage
vs.Temperature
(R
SENSE
= 0.15Ω)
Battery Recharge
Threshold Voltage (V)
4.20
4.15
4.10
4.05
4.00
3.95
3.90
3.85
3.80
-50
-25
0
25
50
75
100
Regulated Output Voltage vs. Charge Current
(R
SENSE
= 0.15Ω)
)
Regulated Output Voltage (V)
4.25
4.23
4.21
4.19
4.17
4.15
0
100
200
300
400
500
600
700
Temperature (°C)
Charging Current (mA)
Regulated Output Voltage vs. Input Voltage
(R
SENSE
= 0.15Ω)
Regulated Output Voltage (V)
4.40
Regulated Output Voltage vs. Temperature
(R
SENSE
= 0.15Ω)
Regulated Output Voltage (V)
4.250
4.225
4.200
4.175
4.150
4.125
4.100
-50
-25
0
25
50
75
100
4.30
4.20
4.10
4.00
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage (V)
Temperature (°C)
Trickle Charge Threshold Voltage (V)
Trickle Charge Threshold Voltage
vs.Temperature
3.4
3.3
3.2
3.1
3.0
2.9
2.8
-50
Trickle Charge Current vs. Temperature
(R
SENSE
= 0.15Ω)
Trickle Charge Current (mA)
170
165
160
155
150
145
140
135
130
-50
-25
0
25
50
75
100
(R
SENSE
= 0.15Ω)
-25
0
25
50
75
100
Temperature (°C)
Temperature (°C)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
5
工业自动化与控制
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
