AAT3693 Advanced Analogic Technologies, Inc., AAT3693 Datasheet - Page 10

• Manufacturer Part Number: AAT3693
• Description: 1.6a Lithium-ion/polymer Battery Charger In 2.2x2.2 Tdfn
• Manufacturer: Advanced Analogic Technologies, Inc.

Functional Block Diagram
TERM
Functional Description
The AAT3693 is a high performance battery charger
designed to charge single-cell lithium-ion or lithium-
polymer batteries with up to 1.6A of current from an
external power source. It is a stand-alone charging solu-
tion, with just one external component required for com-
plete functionality.
The AAT3693 precisely regulates battery charge voltage
and current for 4.2V lithium-ion/polymer battery cells
with constant current level being programmed up to 1.6A
for rapid charging applications. The charge termination
current can be programmed by an external resistor.
The AAT3693 is rated for operation from -40°C to +85°C.
In the event of operating ambient temperatures exceed-
ing the power dissipation abilities of the device package
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10
BatteryManager
BatteryManager
ISET
GND
EN
CT
TS
IN
Watchdog
Timer
TM
TM
Comparator
Constant
Current
Current
1.6A Lithium-Ion/Polymer Battery Charger in 2.2x2.2 TDFN
1.6A Lithium-Ion/Polymer Battery Charger in 2.2x2.2 TDFN
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Reverse Blocking
Charge
Control
for a given constant current charge level, the charge
control will enter into thermal limit.
The AAT3693 provides two status monitor output pins
(STAT1 and STAT2) which directly drive two external
LEDs to indicate the battery charging state. With no-
battery detection and status indication, the user can be
notified if battery is not inserted properly.
Device junction temperature and charge state are fully
monitored for fault conditions. In the event of an over-
voltage or over-temperature failure, the device will auto-
matically shut down, protecting the charging device,
control system, and the battery under charge.
During battery charging, the device temperature will
rise. In some cases with adapter charging, the power
dissipation in the device may cause the junction tem-
perature to rise closer to its thermal shutdown threshold.
Over-Temp.
Battery OV Protection
Pre-charge
Charge
Protect
Status
UVLO
CV/
PRODUCT DATASHEET
PRODUCT DATASHEET
Thermal
Loop
AAT3693
AAT3693
3693.2009.04.1.1
3693.2009.04.1.1
BAT
STAT1
STAT2