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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Features
* 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
General Description
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. 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 -40C to +85C temperature range.
* Automatic Current Sensing
* Automatic Recharge Sequencing * Full Battery Charge Auto Turn Off/Sleep Mode/Charge Termination * Shutdown Current <1A * 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(R) 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
ADP BAT C
BATT+
AAT3684
Enable
STAT EN ISET GND
BATTBattery Pack
RSET
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM
Pin Description
Pin #
1, 2, 3, 7 4 5 6 8 9 10 EP
500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Symbol
N/C STAT GND ADP BAT ISET EN
Type
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
1 2 3 4 5
10 9 8 7 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
AAT3684 AAT3684-1
Trickle Charge
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
-0.3 to 7.5 -0.3 to VP + 0.3 -40 to 150 300
Units
V V C C
Thermal Information2
Symbol
PD JA
Description
Maximum Power Dissipation Maximum Thermal Resistance
Value
2 50
Units
W C/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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
VADP = 5V, TA = -40C to +85C, unless otherwise noted. Typical values are TA = 25C. Symbol
Operation VADP VUVLO
Description
Conditions
Min
4.0 3
Typ
Max
6.5 4
Units
V V mV mA A A V % V V mA % V
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 VCH/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 ICH/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
Rising Edge Charge Current = 200mA VBAT = 4.25V, EN = GND VBAT = 4V, ADP Pin Open
150 0.5 0.3 0.4 4.158 4.20 0.5 3.0 -0.1
1 1 2 4.242 3.15
TA = 25C AAT3684 Only Measured from VBAT_EOC
2.85
15 10 2 800 VIN = 5.5V 1.6 STAT Pin Sinks 4mA 4.4 10 10 0.9
500
1.1
V V V mA V % %
0.4 0.4 8
ICH = 100mA; AAT3684 Only
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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
Constant Charging Current vs. Set Resistor Values
1000 600 500 100 400 300 200 100 1 0 2.7
Charging Current vs. Battery Voltage
(AAT3684 only) RSET = 3.24K
ICH (mA)
ICH (mA)
RSET = 5.36K RSET = 8.06K RSET = 16.2K RSET = 31.6K
2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
10
1
10
100
1000
RSET (k)
VBAT (V)
Charging Current vs. Battery Voltage
(AAT3684-1 only)
600 500 400 300 200 100 4.206
End of Charge Battery Voltage vs. Supply Voltage
4.204
RSET = 3.24K VBAT_EOC (V)
RSET = 8.06k
ICH (mA)
4.202 4.200 4.198 4.196 4.194
RSET = 5.36K RSET = 8.06K RSET = 16.2K
RSET = 31.6k
RSET = 31.6K 0 2.7 2.9 3.1
3.3
3.5
3.7
3.9
4.1
4.3
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
VBAT (V)
VIN (V)
End of Charge Voltage Regulation vs. Temperature
(RSET = 8.06k)
4.23 4.22
Constant Charging Current vs. Temperature
(RSET = 8.06k)
210 208 205
VBAT_EOC (V)
ICH (mA)
4.21 4.20 4.19 4.18 4.17
203 200 198 195 193 190
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature (C)
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
1000 550
Operating Current vs. Temperature
(RSET = 8.06k)
VBAT = 3.6V IOP (A) VBAT = 2.85V IOP (A)
100
500 450 400 350
100
10
1
10
300 -50
-25
0
25
50
75
100
RSET (k)
Temperature (C)
Preconditioning Threshold Voltage vs. Temperature
(RSET = 8.06k; AAT3684 Only)
3.03 3.02 20.8 20.6
Preconditioning Charge Current vs. Temperature
(RSET = 8.06k; AAT3684 Only)
VMIN (V)
3.01 3 2.99 2.98 2.97 -50
ITRICKLE (mA)
20.4 20.2 20.0 19.8 19.6 19.4
-25
0
25
50
75
100
19.2
-50
-25
0
25
50
75
100
Temperature (C)
Temperature (C)
Preconditioning Charge Current vs. Supply Voltage
(AAT3684 Only) Trickle Charge Current (mA)
60 50 40 30 20 10 0
Recharging Threshold Voltage vs. Temperature
(RSET = 8.06k)
4.18 4.16 4.14
RSET = 3.24K VRCH (V) RSET = 31.6K
5.2 5.4 5.6 5.8 6 6.2 6.4
RSET = 5.36K RSET = 8.06K RSET = 16.2K
4 4.2 4.4 4.6 4.8 5
4.12 4.10 4.08 4.06 4.04 4.02 -50 -25 0 25 50 75 100
VIN (V)
Temperature (C)
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Typical Characteristics
Sleep Mode Current vs. Supply Voltage
(RSET = 8.06k)
800 700 600 1.2
VIH_ENABLE vs. Supply Voltage
(RSET = 8.06k)
85C VIH_ENABLE (V)
1.1 1 0.9 0.8 0.7
ISLEEP (nA)
-40C
500 400 300 200 100 0 4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5
25C
-40C
25C
85C
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 = 8.06k)
1.1 1
-40C
VIL_ENABLE (V)
0.9 0.8 0.7 0.6 4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5
25C
85C
VIN (V)
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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
CV/ Precharge
ISET
Constant Current
Charge Control
UVLO
STAT
Charge Status
OverTemperature Protection
EN
GND
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 -40C to +85C. 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.
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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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Preconditioning Trickle Charge Phase Charge Complete Voltage Regulated Current I = Max CC Constant Current Charge Phase Constant Voltage Charge Phase
Constant Current Mode Voltage Threshold
Trickle Charge and Termination Threshold
I = CC / 10
Figure 1: Current vs. Voltage Profile During Charging Phases.
Battery Preconditioning
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.
Constant Voltage Charging
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.
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 0.3A 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.
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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
System Operation Flow Chart
Enable
Power On Reset
No
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)
No No Recharge Test V RCH > VBAT Yes Current Phase Test VBAT_EOC > VBAT Yes Constant Current Charge Mode
No
Voltage Phase Test IBAT > ITERM
Yes
Constant Voltage Charge Mode
No
Charge Completed
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Nominal ICHARGE (mA)
500 450 400 350 300 250 200 150 100 50 40 30 20 15
Application Information
Adapter or USB Power Input
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.
Set Resistor Value (k)
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
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.
Table 1: RSET Values.
1000
Enable / Disable
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.
ICH (mA)
100
10
1
1
10
100
1000
RSET (k)
Figure 2: Constant Charging Current vs. Set Resistor Values.
Protection Circuitry
Over-Voltage Protection
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.
Programming Charge Current
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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Thermal Considerations
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 50C/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. First, the maximum power dissipation for a given situation should be calculated:
Over-Temperature Shutdown
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.
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
No battery charging activity Battery charging via adapter or USB port Charging completed
Status
OFF ON OFF
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:
PD(MAX) =
Where:
(TJ(MAX) - TA) JA
PD(MAX) = Maximum Power Dissipation (W) JA = Package Thermal Resistance (C/W) TJ(MAX) = Maximum Device Junction Temperature (C) [135C] TA = Ambient Temperature (C) Figure 3 shows the relationship of maximum power dissipation and ambient temperature of AAT3684.
3.00 2.50
PD(MAX) (mW)
R 1=
Example:
(VADP - VF(LED)) ILED
2.00 1.50 1.00 0.50 0.00
R1 =
(5.5V - 2.0V) = 1.75k 2mA
0
20
40
60
80
100
Note: Red LED forward voltage (VF) is typically 2.0V @ 2mA.
TA (C)
Figure 3: Maximum Power Dissipation.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
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 1F to 22F 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 10F 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. 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.
Output Capacitor
The AAT3684 only requires a 1F ceramic capacitor on the BAT pin to maintain circuit stability. This value should be increased to 10F 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 10F may be required to prevent the device from cycling on and off when no battery is present.
ICC(MAX) =
(PD(MAX) - VIN * IOP) VIN - VBAT
(TJ(MAX) - TA) - V * I IN OP JA 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.
500 450 400 350 300 250 200 150 100 50 0 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.75
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.
TA = 60C TA = 45C TA = 85C
ICC(MAX) (mA)
VIN (V)
Figure 4: Maximum Charging Current Before Thermal Cycling Becomes Active.
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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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
VIN(ADP)
JP2 Enable C1 10F JP1 D1 RED LED R1 1.5K
STDFN2.2x2.2-10
1 2 3 4 5
VBAT
N/C EN N/C ISET N/C BAT STAT N/C GND ADP
U1 AAT3684
10 9 8 7 6
R2 8.06K
C2 4.7F
C1 10F 10V 10% X5R 0805 GRM21BR61A106KE19 C2 4.7F 6.3V 10% X5R 0603 GRM188R60J475KE19
Figure 8: AAT3684 Evaluation Board Schematic.
Component
U1 R1 R2 C1 C2 JP1, JP2 LED1
Part Number
AAT3684IOQ-T1 Chip Resistor Chip Resistor GRM21BR61A106KE19 GRM188R60J475KE19 PRPN401PAEN CMD15-21SRC/TR8
Description
500mA USB Port or AC Adapter Battery Charger; STDFN2.2x2.2-10 Package 1.5K, 5%, 1/4W; 0603 8.06K, 1%, 1/4W; 0603 CER 10F 10V 10% X5R 0805 CER 4.7F 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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Ordering Information
Trickle Charge
Yes No
Package
STDFN2.2x2.2-10 STDFN2.2x2.2-10
Marking1
TNXYY TXXYY
Part Number (Tape and Reel)2
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.
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PRODUCT DATASHEET
AAT3684
BatteryManagerTM 500mA USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger
Package Information
STDFN2.2x2.2-10
Index Area 2.200 0.050 1.000 0.050 Detail "A"
Top View
2.200 0.050
1.710 0.050
Bottom View
0.350 0.050
0.550 0.050
0.025 0.025
0.152 REF
Side View
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
(c) 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
www.analogictech.com
0.210 0.050
0.400 BSC
17

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