The AAT3686 BatteryManager is a highly integrated sin-
gle-cell lithium-ion/polymer battery charger IC designed
to operate with USB port and AC adapter inputs. It
requires the minimum number of external components.
The AAT3686 precisely regulates battery charge voltage
and current for 4.2V lithium-ion/polymer battery cells.
Adapter charge current rates can be programmed up to
1.5A. In the absence of an adapter and with a USB port
connected, the battery can also be charged by USB power.
Depending on the USB port type, the AAT3686 charge
current can be programmed for two separate levels up to
500mA. An optional Charge Reduction Loop is also built in
to allow users to charge the battery with available current
from a USB port, while keeping the port voltage regulat-
ed. USB charging is disabled when an adapter is present.
Battery temperature and charge state are fully moni-
tored for fault conditions. In the event of an over-volt-
age or over-temperature failure, the device will auto-
matically shut down, thus protecting the charging device,
control system, and the battery under charge. Status
monitor output pins are provided to indicate the battery
charge status by directly driving two external LEDs. A
serial interface output is available to report 22 various
status states to a microcontroller.
The AAT3686 is available in a Pb-free, thermally-
enhanced, space-saving TDFN34-16 (3x4mm) or
TDFN44-16 (4x4mm) package and is rated over the
-40°C to +85°C temperature range.
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Features
• USB Port/AC Adapter System Power Charger
▪
USB: Programmable to 500mA for USB Hi/Lo
▪
Adapter: Programmable to 1.5A Max
• 4.0V to 5.5V Input Voltage Range
• Adapter Present Indicator (ADPP# Pin)
• Adapter Presence Automatically Disables USB Charging
• High Level of Integration With Internal:
▪
Charging Devices
▪
Reverse Blocking Diodes
▪
Current Sensing
• Automatic Recharge Sequencing
• Digital Thermal Regulation in ADP Charge
• Charge Reduction Loop in USB Charge
• Battery Temperature Monitoring
• Full Battery Charge Auto Turn-Off
• Over-Voltage and Emergency Thermal Protection
• Power On Reset and Soft Start
• Serial Interface Status Reporting
• TDFN34-16 or TDFN44-16 Package
Applications
•
•
•
•
•
•
Cellular Telephones
Digital Still Cameras
Hand-Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Other Lithium-Ion/Polymer Battery-Powered Devices
Typical Application
Enable
USB Input
USB Hi/Lo Select
USB
USBSEL
USBH
R
SETH
R
SETL
USBL
BAT
TS
CT
C
T
C2
10µF
EN
CHR
BATT+
AAT3686
BATT-
ADP Present
ADP Input
R
SET
ADPP#
ADP
ADPSET
STAT1
GND
DATA
STAT2
TEMP
Battery Pack
Serial Data
3686.2007.12.1.11
www.analogictech.com
1
PRODUCT DATASHEET
AAT3686
BatteryManager
TM
Pin Descriptions
Pin #
(TDFN34-16/
TDFN44-16)
1
2
3
4
5
6
7
8
9
10
11
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Name
USB
BAT
ADP
GND
CHR
EN
ADPP#
TS
DATA
STAT2
STAT1
Type
In
In/Out
In
Ground
In/Out
In
Out
In/Out
In/Out
Out
Out
Function
USB power supply input.
Battery charging and sensing.
Adapter input.
Ground connection.
Resistor divider to set USB voltage regulation for charge reduction mode. Leave
this pin open for default 4.5V USB regulation point. Tie to USB pin to disable this
function.
Enable pin. Logic high enables the IC.
Adapter present indicator. This pin is open drain until ADP pin reaches threshold
Connect to 10kΩ NTC thermistor.
Status report to microcontroller via serial interface, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
Timing capacitor to adjust internal watchdog timer. Set maximum charge time for
adapter powered trickle, CC, and CV charge modes. The watchdog timer only sets
the timers for adapter battery charging; there is no timeout for the battery charg-
ing from the USB input. If timing function is not needed, terminate this pin to
ground.
When USB is present, use this pin to toggle between 100mA and 500mA limit.
Connect resistor here to set charge current for low-current USB port.
Connect resistor here to set charge current for high-current USB port.
Use resistor at this pin to set adapter charging current.
Exposed paddle (bottom); connect to GND directly beneath package.
12
CT
In/Out
13
14
15
16
EP
USBSEL
USBL
USBH
ADPSET
In
In/Out
In/Out
In/Out
Pin Configuration
TDFN34-16
(Top View)
TDFN44-16
(Top View)
USB
BAT
ADP
GND
CHR
EN
ADPP#
TS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ADPSET
USBH
USBL
USBSEL
CT
STAT1
STAT2
DATA
USB
BAT
ADP
GND
CHR
EN
ADPP#
TS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ADPSET
USBH
USBL
USBSEL
CT
STAT1
STAT2
DATA
2
www.analogictech.com
3686.2007.12.1.11
PRODUCT DATASHEET
AAT3686
BatteryManager
TM
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
AAT3686 Feature Options
Product
AAT3686
AAT3686-1
AAT3686-3
Internal Pull-Up
Resistor on EN Pin
No
Yes
No
Can Leave
TS Pin Open
No
Yes
No
Battery Recharge
Voltage Active
Always active
Always active
Active only after charge complete
Absolute Maximum Ratings
1
Symbol
V
P
V
P
V
N
T
J
T
LEAD
Description
USB, ADP Input Voltage, <30ms, Duty Cycle <10%
USB, ADP Input Voltage, Continuous
BAT, USBSEL, USBH, USBL, ADPSET, STAT1, STAT2, ADPP#, DATA, TS, CT, CHR, EN
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads)
Value
-0.3 to 7.0
-0.3 to 6.0
-0.3 to V
P
+ 0.3
-40 to 150
300
Units
V
V
V
°C
°C
Thermal Information
2
Symbol
θ
JA
P
D
Description
Maximum Thermal Resistance
Maximum Power Dissipation
Value
37
2.7
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.
3686.2007.12.1.11
www.analogictech.com
3
PRODUCT DATASHEET
AAT3686
BatteryManager
TM
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
1
V
ADP
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
Description
Conditions
Min
4.0
USB Present
Rising Edge
CC Charge Current = 500mA
AAT3686, AAT3686-3: V
BAT
= 4.25V
AAT3686-1: V
BAT
= 4.25V
V
BAT
= 4V, USB, ADP Pins Open
4.158
2.8
4.25
4.25
4.5
4.5
3.0
150
0.75
0.3
1
1.0
4.2
0.5
3.0
V
BAT_EOC
-
0.1
4.5
2.0
Typ
Max
5.5
4.7
4.7
Units
V
V
V
V
mV
mA
µA
µA
Operation
USB, ADP USB Port or Adapter Voltage Range
V
ADPP
V
U_DSBL
V
UVLO
I
OP
I
SLEEP
Adapter Present Indicator Threshold Voltage
ADP Voltage Level to Disable USB Charging
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Operating Current
Sleep Mode Current
1.5
1.0
3
I
Leakage
Reverse Leakage Current from BAT Pin
Voltage Regulation
V
BAT_EOC1
End of Charge Voltage Accuracy
∆V
BAT
/V
BAT
EOC Voltage Tolerance
V
MIN
Preconditioning Voltage Threshold
V
RCH
Battery Recharge Voltage Threshold
4.242
3.15
V
%
V
V
V
USB_CHR
USB Charge Reduction Regulation
V
CHR
CHR Pin Voltage Accuracy
Current Regulation
Charge Current
I
CH
∆I
CH
/I
CH
Charge Current Regulation Tolerance
V
ADPSET
ADPSET Pin Voltage
V
USBH
USBH Pin Voltage
V
USBL
USBL Pin Voltage
K
IA
Current Set Factor: I
CHARGE
/I
ADPSET
K
IUH
Current Set Factor: I
CHARGE
/I
USBH
K
IUL
Current Set Factor: I
CHARGE
/I
USBL
Charging Devices
R
DS(ON)A
Adapter Charging Transistor On Resistance
USB Charging Transistor On Resistance
R
DS(ON)U
No Connection on CHR Pin
4.3
1.9
100
4.64
2.1
1500
V
V
mA
%
V
V
V
CC Mode
CC Mode
CC Mode
10
2.0
2.0
2.0
4000
2000
2000
0.2
0.4
0.25
0.5
0.35
0.65
V
IN
= 5.5V
V
IN
= 5.5V
Ω
Ω
1. The AAT3686 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -40°C to +85°C temperature range is guaranteed by
design.
4
www.analogictech.com
3686.2007.12.1.11
PRODUCT DATASHEET
AAT3686
BatteryManager
TM
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
1
V
ADP
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
Description
Conditions
Min
1.6
0.4
1.6
AAT3686-1 Only; V
EN
= 5V
ADPP# Pin Sinks 4mA
C
CT
= 100nF, V_ADP = 5.5V
C
CT
= 100nF, V_ADP = 5.5V
C
CT
= 100nF, V_ADP = 5.5V
STAT Pin Sinks 4mA
8.0
4.4
10
50
7.5
35
80
330
15
2.3
10
8
1.6
0.4
Status Request
200
50
20
90
110
85
145
0.4
10
0.4
25
3.0
3.0
0.4
Typ
Max
Units
V
V
V
V
µA
V
Minute
Hour
Hour
V
mA
V
%
%
Logic Control / Protection
Input High Threshold
V
USBSEL(H)
V
USBSEL(L)
Input Low Threshold
V
EN(H)
Input High Threshold
V
EN(L)
Input Low Threshold
I
EN(H)
EN Input Current
Output Low Voltage
V
ADPP#
T
P
Preconditioning Time Out (ADP mode only)
Preconditioning and Constant Current Mode
T
C
Time Out (ADP mode only)
Constant Voltage Mode Time Out (ADP
T
V
mode only)
V
STAT
Output Low Voltage
I
STAT
STAT Pin Current Sink Capability
Over-Voltage Protection Threshold
V
OVP
I
TK
/I
CHG
I
TERM
/I
CHG
I
TS
TS1
TS2
I_DATA
I_ADPP#
V
DATA(H)
V
DATA)(L)
SQ
PULSE
t
PERIOD
f
DATA
T
REG
T
LOOP_IN
T
LOOP_OUT
T
OVSD
Pre-Charge Current
Charge Termination Threshold Current
Current Source from TS Pin
TS Hot Temperature Fault
TS Cold Temperature Fault
DATA Pin Sink Current
ADPP# Current Sink Capability
Input High Threshold
Input Low Threshold
Status Request Pulse Width
System Clock Period
Data Output Frequency
Thermal Loop Regulation
Thermal Loop Entering Threshold
Thermal Loop Exiting Threshold
Over-Temperature Shutdown Threshold
For
For
For
For
Adapter or USBH Mode
USBL Mode
Adapter or USBH Mode
USBL Mode
70
310
2.2
3
Threshold
Hysteresis
Threshold
Hysteresis
DATA Pin is Active Low State
ADPP# Pin is Active Low State
90
350
2.4
µA
mV
V
mV
mA
mA
V
V
ns
µs
kHz
°C
°C
°C
°C
1. The AAT3686 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -40°C to +85°C temperature range is guaranteed by
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