Analogic AAT3684IOQ-4.2-1-T1 500ma usb port or ac adapter lithium-ion/polymer battery charger Datasheet

PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
General Description
Features
The AAT3684 BatteryManager is an integrated single cell
lithium-ion/polymer battery charger IC, designed to operate from a DC power source or USB port up to an input
voltage of 6.5V. It requires just one external component.
• USB or AC Adapter System Power Charger
▪ Programmable from 15mA to 500mA
• 4.0V ~ 6.5V Input Voltage Range
• High Level of Integration with Internal:
▪ Charging Device
▪ Reverse Blocking Diode
The AAT3684 precisely regulates battery charge voltage
and current for 4.2V (4.375V option) lithium-ion/polymer battery cells. When charged from an AC adapter or
USB port, the battery charging current can be set by an
external resistor up to 500mA.
Battery charge state is continuously monitored for fault
conditions. In the event of an over-voltage, short-circuit, or over-temperature failure, the device will automatically shut down, thus protecting the charging device,
control system, and the battery under charge. A status
monitor output pin is provided to indicate the battery
charge status by directly driving an external LED.
The AAT3684 is available in a Pb-free, thermally
enhanced, space-saving 10-pin 2.2x2.2mm STDFN package and is specified for operation over the -40°C to
+85°C temperature range.
• Automatic Current Sensing
• Automatic Recharge Sequencing
• Full Battery Charge Auto Turn Off/Sleep Mode/Charge
Termination
• Shutdown Current <1μA
• Automatic Trickle Charge for Battery Pre-Conditioning
(AAT3684-1 is No Trickle Charge Option)
• Over-Voltage and Emergency Thermal Protection
• Power On Reset and Soft Start
• LED Status Pin
• STDFN2.2x2.2-10 Package
Applications
•
•
•
•
•
•
•
Bluetooth® Headsets
DECT Headsets
Digital Still Cameras
MP3, Portable Music, and Portable Media Players
Personal Data Assistants (PDAs)
Wrist Watches
Other Lithium-Ion/Polymer Battery-Powered Devices
Typical Application
Adapter/USB Input
BATT+
BAT
ADP
C
AAT3684
Enable
BATTBattery
Pack
STAT
EN
ISET
GND
RSET
3684.2007.12.1.2
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1
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Pin Description
Pin #
Symbol
Type
1, 2, 3, 7
4
5
6
8
9
10
EP
N/C
STAT
GND
ADP
BAT
ISET
EN
Out
Power
Power In
In/Out
In/Out
In
Function
Not connected.
Open drain status pin.
Ground connection.
Input from USB/adapter charger.
Battery charging and sensing.
Connect resistor here to set the charge current.
Enable pin. Logic high enables the IC (internally pulled down).
Exposed paddle (bottom): connect to ground as closely as possible to the device.
Pin Configuration
STDFN2.2x2.2-10
(Top View)
N/C
N/C
N/C
STAT
GND
2
1
10
2
9
3
8
4
7
5
6
EN
ISET
BAT
N/C
ADP
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3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
AAT3684 Feature Options
Product
Trickle Charge
AAT3684
AAT3684-1
Yes
No
Absolute Maximum Ratings1
Symbol
VP
VN
TJ
TLEAD
Description
ADP Continuous
BAT, STAT, ISET, EN
Operating Junction Temperature Range
Maximum Soldering Temperature (at Leads)
Value
Units
-0.3 to 7.5
-0.3 to VP + 0.3
-40 to 150
300
V
V
°C
°C
Value
Units
2
50
W
°C/W
Thermal Information2
Symbol
PD
θJA
Description
Maximum Power Dissipation
Maximum Thermal Resistance
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.
3684.2007.12.1.2
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3
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
VADP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
Operation
VADP
VUVLO
Description
Conditions
Adapter Voltage Range
Under-Voltage Lockout (UVLO)
UVLO Hysteresis
Operating Current
IOP
ISHUTDOWN
Shutdown Current
ILEAKAGE
Reverse Leakage Current from BAT Pin
Voltage Regulation
End of Charge Accuracy
VBAT_EOC
ΔVCH/VCH
Output Charge Voltage Tolerance
VMIN
Preconditioning Voltage Threshold
VRCH
Battery Recharge Voltage Threshold
Current Regulation
ICH
Charge Current Programmable Range
Charge Current Regulation Tolerance
ΔICH/ICH
VSET
ISET Pin Voltage
KI_A
Current Set Factor: ICH/ISET
Charging Devices
RDS(ON)
Charging Transistor On Resistance
Logic Control/Protection
VEN(H)
Input High Threshold
Input Low Threshold
VEN(L)
VSTAT
Output Low Voltage
ISTAT
STAT Pin Current Sink Capability
Over-Voltage Protection Threshold
VOVP
ITK/ICH
Pre-Charge Current
ITERM/ICH
Charge Termination Threshold Current
4
Rising Edge
Min
4.0
3
150
0.5
0.3
0.4
Charge Current = 200mA
VBAT = 4.25V, EN = GND
VBAT = 4V, ADP Pin Open
4.158
TA = 25°C
AAT3684 Only
Measured from VBAT_EOC
Typ
2.85
4.20
0.5
3.0
-0.1
15
Max
Units
6.5
4
V
V
mV
mA
μA
μA
1
1
2
4.242
3.15
500
mA
%
V
1.1
Ω
10
2
800
VIN = 5.5V
0.9
1.6
0.4
0.4
8
STAT Pin Sinks 4mA
ICH = 100mA; AAT3684 Only
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4.4
10
10
V
%
V
V
V
V
V
mA
V
%
%
3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Typical Characteristics
Charging Current vs. Battery Voltage
Constant Charging Current
vs. Set Resistor Values
(AAT3684 only)
600
1000
RSET = 3.24K
100
ICH (mA)
ICH (mA)
500
10
400
RSET = 5.36K
300
RSET = 8.06K
200
RSET = 16.2K
100
1
1
10
100
0
2.7
1000
4.204
4.1
4.3
RSET = 5.36K
RSET = 8.06K
RSET = 16.2K
RSET = 8.06kΩ
4.202
4.200
RSET = 31.6kΩ
4.198
4.196
3.3
3.5
3.7
3.9
4.1
4.194
4.3
4.5
4.75
5
5.25
VBAT (V)
5.5
5.75
6
6.25
6.5
VIN (V)
End of Charge Voltage Regulation
vs. Temperature
Constant Charging Current vs. Temperature
(RSET = 8.06kΩ
Ω)
(RSET = 8.06kΩ
Ω)
210
4.23
208
4.22
205
4.21
203
ICH (mA)
VBAT_EOC (V)
3.9
4.206
RSET = 3.24K
RSET = 31.6K
0
2.7
2.9
3.1
4.20
4.19
200
198
195
4.18
4.17
3.7
End of Charge Battery Voltage
vs. Supply Voltage
VBAT_EOC (V)
ICH (mA)
100
3.5
Charging Current vs. Battery Voltage
400
200
3.3
VBAT (V)
600
300
3.1
RSET (kΩ
Ω)
(AAT3684-1 only)
500
RSET = 31.6K
2.9
193
190
-50
-25
0
25
50
75
100
Temperature (°C)
3684.2007.12.1.2
-50
-25
0
25
50
75
100
Temperature (°C)
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Typical Characteristics
Operating Supply Current vs. Set Resistor
Operating Current vs. Temperature
(RSET = 8.06kΩ
Ω)
550
1000
500
IOP (µA)
IOP (µA)
VBAT = 3.6V
VBAT = 2.85V
100
450
400
350
10
1
10
300
-50
100
-25
0
RSET (kΩ
Ω)
Preconditioning Threshold Voltage
vs. Temperature
(RSET = 8.06kΩ
Ω; AAT3684 Only)
20.6
ITRICKLE (mA)
VMIN (V)
100
(RSET = 8.06kΩ
Ω; AAT3684 Only)
3.01
3
2.99
20.4
20.2
20.0
19.8
19.6
2.98
19.4
2.97
-50
-25
0
25
50
75
19.2
100
-50
-25
Temperature (°C)
25
50
75
100
Recharging Threshold Voltage
vs. Temperature
(RSET = 8.06kΩ
Ω)
(AAT3684 Only)
60
4.18
RSET = 3.24K
50
0
Temperature (°C)
Preconditioning Charge Current
vs. Supply Voltage
4.16
4.14
40
VRCH (V)
Trickle Charge Current (mA)
75
20.8
3.02
RSET = 5.36K
30
RSET = 8.06K
20
RSET = 16.2K
10
RSET = 31.6K
4.12
4.10
4.08
4.06
4.04
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
5.8
6
6.2
6.4
4.02
VIN (V)
6
50
Preconditioning Charge Current
vs. Temperature
3.03
0
25
Temperature (°C)
-50
-25
0
25
50
75
100
Temperature (°C)
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3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Typical Characteristics
VIH_ENABLE vs. Supply Voltage
Sleep Mode Current vs. Supply Voltage
(RSET = 8.06kΩ
Ω)
(RSET = 8.06kΩ
Ω)
800
1.2
700
85°C
1.1
VIH_ENABLE (V)
ISLEEP (nA)
600
500
400
300
25°C
200
-40°C
-40°C
1
0.9
25°C
0.8
100
0
85°C
0.7
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
VIN (V)
VIN (V)
VIL_ENABLE vs. Supply Voltage
(RSET = 8.06kΩ
Ω)
1.1
-40°C
VIL_ENABLE (V)
1
0.9
0.8
25°C
0.7
85°C
0.6
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
VIN (V)
3684.2007.12.1.2
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Functional Block Diagram
Reverse Blocking
ADP
BAT
Current
Compare
Constant
Current
ISET
STAT
CV/
Precharge
Charge
Control
UVLO
OverTemperature
Protection
Charge
Status
GND
EN
Functional Description
The AAT3684 is a high performance battery charger
designed to charge single cell lithium-ion/polymer batteries with up to 500mA of current from an external
power source. It is a stand-alone charging solution, with
just one external component required for complete functionality. The AAT3684 precisely regulates battery charge
voltage and current for 4.2V lithium-ion/polymer battery
cells.
The adapter/USB charge input constant current level can
be programmed up to 500mA for rapid charging applications. The AAT3684 is rated for operation from -40°C to
+85°C. In the event of operating ambient temperatures
exceeding the power dissipation abilities of the device
package for a given constant current charge level, the
charge control will enter into thermal limit.
8
A status monitor output pin is provided to indicate the
battery charge state by directly driving one external
LED.
Battery temperature and charge state are fully monitored for fault conditions. In the event of an over-voltage
or over-temperature failure, the device will automatically shut down, protecting the charging device, control
system, and the battery under charge.
Charging Operation
The AAT3684 has four basic modes for the battery
charge cycle: pre-conditioning/trickle charge; constant
current/fast charge; constant voltage; and end of
charge. (See Figure 1.) (AAT3684-1 does not have trickle charge.)
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3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Preconditioning
Trickle Charge
Phase
Constant Current
Charge Phase
Constant Voltage
Charge Phase
Charge Complete Voltage
I = Max CC
Regulated Current
Constant Current Mode
Voltage Threshold
Trickle Charge and
Termination Threshold
I = CC / 10
Figure 1: Current vs. Voltage Profile During Charging Phases.
Battery Preconditioning
Constant Voltage Charging
Before the start of charging, the AAT3684 checks several conditions in order to assure a safe charging environment. The input supply must be above the minimum
operating voltage, or under-voltage lockout threshold
(VUVLO), for the charging sequence to begin. When these
conditions have been met and a battery is connected to
the BAT pin, the AAT3684 checks the state of the battery. If the cell voltage is below the preconditioning voltage threshold (VMIN), the charge control begins preconditioning the cell. The battery preconditioning trickle
charge current is equal to the fast charge constant current divided by 10. For example, if the programmed fast
charge current is 500mA, then the preconditioning mode
(trickle charge) current will be 50mA. Cell preconditioning is a safety precaution for deeply discharged battery
cells and also aids in limiting power dissipation in the
pass transistor when the voltage across the device is at
the greatest potential.
The system transitions to a constant voltage charging
mode when the battery voltage reaches the output
charge regulation threshold (VBAT_EOC) during the constant current fast charge phase. The regulation voltage
level is factory programmed to 4.2V (±0.5%). Charge
current in the constant voltage mode drops as the battery cell under charge reaches its maximum capacity.
Constant Current Charging
Battery cell preconditioning continues until the voltage
on the BAT pin exceeds the preconditioning voltage
threshold (VMIN). At this point, the AAT3684 begins the
constant current charging phase. The charge constant
current (ICH) amplitude is programmed by the user via
the RSET resistor. The AAT3684 remains in the constant
current charge mode until the battery reaches the voltage regulation point, VBAT_EOC.
3684.2007.12.1.2
End of Charge Cycle Termination
and Recharge Sequence
When the charge current drops to 10% of the programmed fast charge current level in the constant voltage mode, the device terminates charging and goes into
a sleep state. The charger will remain in a sleep state
until the battery voltage decreases to a level below the
battery recharge voltage threshold (VRCH).
When the input supply is disconnected, the charger will
automatically transition into a power-saving sleep mode.
Only consuming an ultra-low 0.3μA in sleep mode, the
AAT3684 minimizes battery drain when it is not charging.
This feature is particularly useful in applications where
the input supply level may fall below the battery charge
or under-voltage lockout level. In such cases where the
AAT3684 input voltage drops, the device will enter sleep
mode and automatically resume charging once the input
supply has recovered from the fault condition.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
System Operation Flow Chart
Enable
No
Power On Reset
Yes
Power Input
Voltage
VIN > VUVLO
Yes
Shut Down
Yes
Fault Conditions
Monitoring
OV, OT
Charge
Control
No (AAT3684)
No (AAT3684-1)
Preconditioning
Test
V MIN > VBAT
Yes
Preconditioning
(Trickle Charge)
Yes
Constant
Current Charge
Mode
Yes
Constant
Voltage Charge
Mode
No
No
Recharge Test
V RCH > VBAT
Yes
Current Phase Test
VBAT_EOC > VBAT
No
Voltage Phase Test
IBAT > ITERM
No
Charge Completed
10
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3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Application Information
Adapter or USB Power Input
Nominal
ICHARGE (mA)
Set Resistor
Value (kΩ)
500
450
400
350
300
250
200
150
100
50
40
30
20
15
3.24
3.57
4.12
4.64
5.36
6.49
8.06
10.7
16.2
31.6
38.3
53.6
78.7
105
Constant current charge levels up to 500mA may be
programmed by the user when powered from a sufficient
input power source. The AAT3684 will operate from the
adapter input over a 4.0V to 6.5V range. The constant
current fast charge current for the adapter input is set
by the RSET resistor connected between ISET and ground.
Refer to Table 1 for recommended RSET values for a
desired constant current charge level.
Adapter Input Charge Inhibit and Resume
The AAT3684 has a UVLO and power on reset feature so
that if the input supply to the ADP pin drops below the
UVLO threshold, the charger will suspend charging and
shut down. When power is re-applied to the ADP pin or
the UVLO condition recovers, the system charge control
will assess the state of charge on the battery cell and will
automatically resume charging in the appropriate mode
for the condition of the battery.
1000
ICH (mA)
Enable / Disable
Table 1: RSET Values.
100
The AAT3684 provides an enable function to control the
charger IC on and off. The enable (EN) pin is internally
pulled down. When pulled to a logic high level, AAT3684
is enabled. When left open or pulled to a logic low level,
the AAT3684 will be shut down and forced into the sleep
state. Charging will be halted regardless of the battery
voltage or charging state. When the device is re-enabled,
the charge control circuit will automatically reset and
resume charging functions with the appropriate charging
mode based on the battery charge state and measured
cell voltage on the BAT pin.
Protection Circuitry
Programming Charge Current
Over-Voltage Protection
The fast charge constant current charge level is user
programmed with a set resistor placed between the ISET
pin and ground. The accuracy of the fast charge, as well
as the preconditioning trickle charge current, is dominated by the tolerance of the set resistor used. For this
reason, a 1% tolerance metal film resistor is recommended for the set resistor function. Fast charge constant current levels from 15mA to 500mA may be set by
selecting the appropriate resistor value from Table 1.
3684.2007.12.1.2
10
1
1
10
100
1000
RSET (kΩ
Ω)
Figure 2: Constant Charging Current
vs. Set Resistor Values.
An over-voltage event is defined as a condition where
the voltage on the BAT pin exceeds the maximum battery charge voltage and is set by the over-voltage protection threshold (VOVP). If an over-voltage condition
occurs, the AAT3684 charge control will shut down the
device until voltage on the BAT pin drops below VOVP. The
AAT3684 will resume normal charging operation after
the over-voltage condition is removed.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Over-Temperature Shutdown
Thermal Considerations
The AAT3684 has a thermal protection control circuit
which will shut down charging functions should the internal die temperature exceed the preset thermal limit
threshold. Once the internal die temperature falls below
the thermal limit, the normal operation will resume the
previous charging state.
The AAT3684 is offered in the STDFN2.2x2.2-10 package, which can provide up to 2W of power dissipation
when it is properly bonded to a printed circuit board and
has a maximum thermal resistance of 50°C/W. Many
considerations should be taken into account when
designing the printed circuit board layout, as well as the
placement of the charger IC package in proximity to
other heat generating devices in a given application
design. The ambient temperature around the charger IC
will also have an effect on the thermal limits of a battery
charging application. The maximum limits that can be
expected for a given ambient condition can be estimated
by the following discussion.
Charge Status Output
The AAT3684 provides battery charge status via a status
pin. This pin is internally connected to an N-channel open
drain MOSFET, which can be used to drive an external
LED. The status pin can indicate the following conditions:
Event Description
Status
No battery charging activity
Battery charging via adapter or USB port
Charging completed
OFF
ON
OFF
First, the maximum power dissipation for a given situation should be calculated:
PD(MAX) =
Table 2: LED Status Indicator.
The LED should be biased with as little current as necessary to create reasonable illumination; therefore, a ballast resistor should be placed between the LED cathode
and the STAT pin. LED current consumption will add to
the overall thermal power budget for the device package, hence it is good to keep the LED drive current to a
minimum. 2mA should be sufficient to drive most lowcost green or red LEDs. It is not recommended to exceed
8mA for driving an individual status LED.
The required ballast resistor values can be estimated
using the following formulas:
(TJ(MAX) - TA)
θJA
Where:
PD(MAX) = Maximum Power Dissipation (W)
θJA
= Package Thermal Resistance (°C/W)
TJ(MAX) = Maximum Device Junction Temperature (°C)
[135°C]
TA
= Ambient Temperature (°C)
Figure 3 shows the relationship of maximum power dissipation and ambient temperature of AAT3684.
3.00
2.50
(VADP - VF(LED))
ILED
PD(MAX) (mW)
R 1=
Example:
R1 =
(5.5V - 2.0V)
= 1.75kΩ
2mA
1.50
1.00
0.50
0.00
Note: Red LED forward voltage (VF) is typically 2.0V @
2mA.
12
2.00
0
20
40
60
80
100
TA (°°C)
Figure 3: Maximum Power Dissipation.
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3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Next, the power dissipation can be calculated by the following equation:
PD = [(VIN - VBAT) · ICC + (VIN · IOP)]
Where:
PD
VIN
VBAT
ICC
IOP
=
=
=
=
Total Power Dissipation by the Device
Input Voltage
Battery Voltage as Seen at the BAT Pin
Constant Charge Current Programmed for the
Application
= Quiescent Current Consumed by the Charger IC
for Normal Operation [0.5mA]
By substitution, we can derive the maximum charge current before reaching the thermal limit condition (thermal
cycling). The maximum charge current is the key factor
when designing battery charger applications.
ICC(MAX) =
(PD(MAX) - VIN · IOP)
VIN - VBAT
(TJ(MAX) - TA) - V · I
IN
OP
θJA
ICC(MAX) =
VIN - VBAT
In general, the worst condition is the greatest voltage
drop across the charger IC, when battery voltage is
charged up to the preconditioning voltage threshold.
Figure 4 shows the maximum charge current in different
ambient temperatures.
500
450
TA = 60°C
ICC(MAX) (mA)
400
350
TA = 45°C
300
250
TA = 85°C
200
150
100
50
0
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
VIN (V)
Figure 4: Maximum Charging Current Before
Thermal Cycling Becomes Active.
3684.2007.12.1.2
Capacitor Selection
Input Capacitor
In general, it is good design practice to place a decoupling capacitor between the ADP pin and GND. An input
capacitor in the range of 1μF to 22μF is recommended.
If the source supply is unregulated, it may be necessary
to increase the capacitance to keep the input voltage
above the under-voltage lockout threshold during device
enable and when battery charging is initiated. If the
AAT3684 adapter input is to be used in a system with an
external power supply source, such as a typical AC-toDC wall adapter, then a CIN capacitor in the range of
10μF should be used. A larger input capacitor in this
application will minimize switching or power transient
effects when the power supply is “hot plugged” in.
Output Capacitor
The AAT3684 only requires a 1μF ceramic capacitor on
the BAT pin to maintain circuit stability. This value should
be increased to 10μF or more if the battery connection
is made any distance from the charger output. If the
AAT3684 is to be used in applications where the battery
can be removed from the charger, such as with desktop
charging cradles, an output capacitor greater than 10μF
may be required to prevent the device from cycling on
and off when no battery is present.
Printed Circuit Board
Layout Considerations
For the best results, it is recommended to physically
place the battery pack as close as possible to the
AAT3684 BAT pin. To minimize voltage drops on the PCB,
keep the high current carrying traces adequately wide.
Refer to the AAT3684 evaluation board for a good layout
example (see Figures 5 and 6).
For better thermal enhancement, solder the exposed
paddle of the IC onto the thermal landing of the PCB,
where the thermal landing is connected to the ground
plane. If heat is still an issue, multi-layer boards with
dedicated ground planes are recommended. Adding
more thermal vias on the thermal landing will also help
transfer heat to the PCB effectively. Figure 7 illustrates
the exploded view of the layout at the bottom of the IC.
www.analogictech.com
13
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Figure 5: AAT3684 Evaluation Board
Top Layer.
Figure 6: AAT3684 Evaluation Board
Bottom Layer.
Figure 7: Exploded View of the Layout.
14
www.analogictech.com
3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
VIN(ADP)
JP2
Enable
C1
10μF
STDFN2.2x2.2-10
JP1
D1
R1
1.5K
RED LED
1
2
3
4
5
N/C
EN
N/C
ISET
N/C
BAT
STAT N/C
GND ADP
VBAT
10
9
8
7
6
U1 AAT3684
R2
8.06K
C2
4.7μF
C1 10μF 10V 10% X5R 0805 GRM21BR61A106KE19
C2 4.7μF 6.3V 10% X5R 0603 GRM188R60J475KE19
Figure 8: AAT3684 Evaluation Board Schematic.
Component
Part Number
U1
AAT3684IOQ-T1
R1
R2
C1
C2
JP1, JP2
LED1
Chip Resistor
Chip Resistor
GRM21BR61A106KE19
GRM188R60J475KE19
PRPN401PAEN
CMD15-21SRC/TR8
Description
500mA USB Port or AC Adapter Battery Charger;
STDFN2.2x2.2-10 Package
1.5KΩ, 5%, 1/4W; 0603
8.06KΩ, 1%, 1/4W; 0603
CER 10μF 10V 10% X5R 0805
CER 4.7μF 6.3V 10% X5R 0603
Conn. Header, 2mm zip
Red LED; 1206
Manufacturer
AnalogicTech
Vishay
Vishay
Murata
Murata
Sullins Electronics
Chicago Miniature Lamp
Table 3: AAT3684 Evaluation Board Bill of Materials.
3684.2007.12.1.2
www.analogictech.com
15
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Ordering Information
Trickle Charge
Package
Marking1
Part Number (Tape and Reel)2
Yes
No
STDFN2.2x2.2-10
STDFN2.2x2.2-10
TNXYY
TXXYY
AAT3684IOQ-4.2-T1
AAT3684IOQ-4.2-1-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor
products that are in compliance with current RoHS standards, including the requirement that lead not
exceed 0.1% by weight in homogeneous materials. For more information, please visit our website at
http://www.analogictech.com/pbfree.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
16
www.analogictech.com
3684.2007.12.1.2
PRODUCT DATASHEET
AAT3684
BatteryManagerTM
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Package Information
STDFN2.2x2.2-10
1.000 ± 0.050
Detail "A"
2.200 ± 0.050
1.710 ± 0.050
2.200 ± 0.050
Index Area
Top View
Bottom View
0.400 BSC
0.025 ± 0.025
0.152 REF
0.550 ± 0.050
0.350 ± 0.050
Side View
0.210 ± 0.050
Pin 1 Indicator
(optional)
R0.200
Detail "A"
All dimensions in millimeters.
1. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
Advanced Analogic Technologies, Inc.
3230 Scott Boulevard, Santa Clara, CA 95054
Phone (408) 737-4600
Fax (408) 737-4611
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual
property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to
support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other
brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
3684.2007.12.1.2
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17
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