AAT3687_08 Datasheet, PDF (1/20 Pages) Advanced Analogic Technologies – Lithium-Ion/Polymer Battery Charger

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°C to +85°C temperature range.
PRODUCT DATASHEET
AAT3687
Lithium-Ion/Polymer Battery Charger
Features
• Input Voltage Range: 4.0V to 5.5V
• Up to 1.5A Charging Current
• Adapter Present Indicator (ADPP#)
• High Level of Integration with Internal:
▪ Charging Device
▪ Reverse Blocking Diode
▪ 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°C to +85°C Temperature Range
Applications
• 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
Adapter
CIN
10µF
RSET
LED1
LED2
ADPP#
BAT
EN
DATA
TS
AAT3687
CT
ADP
ADPSET
STAT1
GND
STAT2
RB1
RB2
CT
0.1µF
BATT+
COUT
+
10µF
BATT-
TEMP
Battery
Pack
3687.2008.04.1.12
www.analogictech.com
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