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AAT3682 Datasheet Preview

AAT3682 Datasheet

Lithium-Ion/Polymer Linear Battery Charger

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AAT3682
Lithium-Ion/Polymer Linear Battery Charger
General Description
BatteryManager
Features
The AAT3682 is a lithium-ion/polymer linear battery
charger. It is designed for compact portable appli-
cations with a single-cell battery. The AAT3682 pre-
cisely regulates battery charge voltage and charge
current, and offers an integrated pass device, mini-
mizing the number of external components required.
The AAT3682 charges the battery in three different
phases: preconditioning, constant current, and con-
stant 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 carefully monitored for fault condi-
tions. A battery charge stable monitor output pin is
provided to indicate the battery charge status
through a display LED or interface to a system con-
troller. 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.
• VIN 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
The AAT3682 is available in a Pb-free, 16-pin
QFN44 package and is specified over the -20°C to
Applications
+70°C temperature range.
www.DataSheet4U.com Cellular Telephones
• Digital Still Cameras
• Hand-Held PCs
• MP3 Players
• Personal Data Assistants (PDAs)
Typical Application
Adapter
RSENSE
CIN = 10μF
VP
R3
Gate
R4
DRV
BAT
T2X
BSENSE
CSI TS
VCC
STAT
VSS
VP
RT1
BATT+
COUT= 1μF
BATT-
LED 1
R2 = 1K
RT2
TEMP
3682.2006.12.1.3
1




AAT

AAT3682 Datasheet Preview

AAT3682 Datasheet

Lithium-Ion/Polymer Linear Battery Charger

No Preview Available !

AAT3682
Lithium-Ion/Polymer Linear Battery Charger
Pin Description
Pin #
1
2, 3, 8, 12
4
Symbol
TS
N/C
STAT
5 VSS
6 DRV
7 T2X
9 BAT
10 VSS
11 GATE
13 VP
14 CSI
15 BSENSE
16 VCC
EP
Function
Battery temperature sense input.
Not connected.
Battery charger status output. Connect an LED in series with 2.2kΩ from STAT to VIN
for a visual monitor battery charge state or connect to a microcontroller to monitor bat-
tery status. A 100kΩ resistor should be placed between STAT and VIN for this function.
Common ground connection.
Battery charge control output.
Battery trickle charge control input. Connect this pin to VSS to double the battery trickle
charge current. Leave this pin floating for normal trickle current (10% of full charge cur-
rent). To enter microcontroller 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)
TS 1
N/C 2
N/C 3
STAT 4
AAT3682
12 N/C
11 GATE
10 VSS
9 BAT
2 3682.2006.12.1.3



Part Number AAT3682
Description Lithium-Ion/Polymer Linear Battery Charger
Maker AAT
Total Page 18 Pages
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AAT3682 Datasheet PDF





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