Battery Charger. AAT3620 Datasheet

AAT3620 Charger. Datasheet pdf. Equivalent

Part AAT3620
Description 1-Cell Li+ Switch Mode Battery Charger
Feature PRODUCT DATASHEET www.DataSheet4U.com AAT3620178 1-Cell Li+ Switch Mode Battery Charger Features • .
Manufacture Anadigics
Datasheet
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AAT3620
www.DataSheet4U.com
BatteryManagerTM
PRODUCT DATASHEET
AAT3620178
1-Cell Li+ Switch Mode Battery Charger
General Description
The AAT3620 BatteryManager™ is a member of
AnalogicTech’s Total Power Management IC™ family.
With the many functions added to mobile devices such
as color display, camera with flash, organizer, video, etc,
the battery capacity must keep pace with the power
requirements. The AAT3620 is the ideal solution for high
capacity Li+ batteries and can supply up to 2.0A charge
current with minimal thermal impact to the system.
The AAT3620 is a PWM switch mode / linear charger with
high charge efficiency at the full constant current (fast
charge) rate. Based on a 1.5MHz PWM step-down “buck”
converter, the AAT3620 PWM switch mode controls the
constant current charge mode up to 2.0A, and auto-
matically switches to linear mode charging during the
battery conditioning low level current and the light load
end of charge current termination region. The full charge
rate and the end of charge current can be programmed
with separate external resistors. A shared charge current
indication pin is available for a Coulomb counter.
Battery charge temperature and charge state are fully
monitored for fault conditions. In the event of an over-
current, over-voltage, short-circuit or over-temperature
failure, the device will automatically shut down. A status
monitor output pin is provided to indicate the battery
charge status and power source status though a display
LED.
The AAT3620 is available in a thermally enhanced,
space-saving 14-pin 3x3mm TDFN package that includes
all essential components for a switch-mode battery
charger.
Features
• 4.3V~6.0V Input Range
• Up to 2.0A Charge Current Capability
• 1.5MHz PWM/Linear Charger
• Over 90% Full Rate Charge Efficiency
• Integrated Switching Device
• Integrated Sense Resistor
• Built-in Reverse Blocking Feature
• Battery Preconditioning/Constant Voltage/Constant
Current Charge Mode
• Programmable End of Charge Current
• 1% Constant Voltage Mode Regulation
• Built-in Programmable Charging Timer
• Charge Current Indication Pin
• Over-Voltage, Over-Current, and Over-Temperature
Protection
• Battery Over-Temperature Protection
• Power-On Reset and Soft-Start
• TDFN33-14 Package
Applications
• Digital Camcorders
• Point of Service (POS)
• Portable DVD Players
• Portable Hand-held Solutions
• Portable Media Player
Typical Application
4.7µH
Adapter
Charge Enable
Timer Disable
Charging Status 1
Charging Status 2
22µF
0.1µF
CS
VPIN
VCC
EN
0.1µF
CT
LX
BAT
PGND
TS
STAT1
ISET
STAT2
TERM
GND
RTERM
Battery
BATT + Pack
22µF
to 47µF
BATT-
+
TEMP
Charge Current Set
Termination Current Set
and Charge Current Indicator
R SET
3620.2009.01.1.0
www.analogictech.com
1



AAT3620
www.DataSheet4U.com
BatteryManagerTM
PRODUCT DATASHEET
AAT3620178
1-Cell Li+ Switch Mode Battery Charger
Pin Description
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EP
Name
VPIN
PGND
GND
VCC
EN
ISET
CT
STAT2
STAT1
TERM
TS
BAT
CS
LX
EP
Type
In
Ground
Ground
In
In
In
In/Out
Out
Out
In/Out
In/Out
Out
In
In/Out
Ground
Function
Adapter power input.
Power ground
Analog ground connection.
Supply Input
Charge enable input, active high, with internal pull-up (to VPIN).
Connect RSET resistor to pin to set constant current charge current.
Timer pin: connect timing capacitor here for charge timer function; connect to ground to
disables the timer function.
Battery charge status 2 indicator pin to drive an LED, open-drain.
Battery charge status 1 indicator pin to drive an LED, open-drain.
Connect RTERM resistor to pin to set termination current. Charging current can be monitor
with this pin. Leave OPEN to set to 200mA default termination current.
Battery pack temperature sensing input. To disable TS function, pull up to VCC through 10k
resistor.
Battery positive terminal connecting pin.
Return pin for inductor for internal current sensing
Switching node.
The exposed thermal pad (EP) must be connected to board ground plane and pins 2 and 3.
The ground plane should include a large exposed copper pad under the package for thermal
dissipation (see package outline).
Pin Configuration
TDFN33-14
(Top View)
VPIN 1
PGND 2
GND 3
VCC 4
EN 5
ISET 6
CT 7
14 LX
13 CS
12 BAT
EP 11 TS
10 TERM
9 STAT1
8 STAT2
2
www.analogictech.com
3620.2009.01.1.0







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