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AAT3687-1 Datasheet

  • AAT3687-1

  • Lithium-Ion/Polymer Battery Charger

  • 20頁(yè)

  • ANALOGICTECH

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PRODUCT DATASHEET
AAT3687
BatteryManager
TM
General Description
The AAT3687 BatteryManager is a highly integrated sin-
gle-cell lithium-ion/polymer battery charger IC designed
to operate with AC adapter inputs. It requires a mini-
mum number of external components. The AAT3687
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. An
active thermal management system regulates the fast
charge constant current for all ambient temperature and
input vs. output voltage conditions.
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 12 various
charging status states to a microcontroller.
The AAT3687 is available in a Pb-free, thermally-enhanced,
space-saving 12-pin TDFN 3x3mm package and is rated
over the -40擄C to +85擄C temperature range.
Lithium-Ion/Polymer Battery Charger
Features
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Input Voltage Range: 4.0V to 5.5V
Up to 1.5A Charging Current
Adapter Present Indicator (ADPP#)
High Level of Integration with Internal:
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Charging Device
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Reverse Blocking Diode
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Current Sensing
Active Thermal Loop Charge Reduction
Automatic Recharge Sequencing
Battery Temperature Monitoring
Full Battery Charge Auto Turn-Off / Sleep Mode
Over-Voltage, Over-Current, and Over-Temperature
Protection
Power On Reset and Soft Start
Serial Interface Status Report
12-Pin 3x3mm TDFN Package
-40擄C to +85擄C Temperature Range
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Applications
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Cellular Telephones
Digital Still Cameras
Hand Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Other Lithium-Ion/Polymer Battery-Powered Devices
Typical Application
Adapter
Present
Enable
Serial Interface
BATT+
ADPP#
EN
DATA
TS
BAT
C
OUT
10碌F
+
BATT-
AAT3687
CT
Adapter
C
IN
10碌F
R
SET
ADP
ADPSET
STAT1
GND
STAT2
C
T
0.1碌F
TEMP
R
B1
LED1
R
B2
Battery
Pack
LED2
3687.2008.04.1.12
www.analogictech.com
1

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