LX2208 Datasheet, PDF (1/11 Pages) Microsemi Corporation – 2 Amp Three Level Lithium Ion Battery Charger

LX2208
2 Amp Three Level Lithium Ion Battery Charger
®
TM
PRODUCTION DATA SHEET
DESCRIPTION
The LX2208 is a single cell level and the conditioning current at 5%
Lithium Ion or Lithium Polymer of the constant current level. Power
battery charger. The controller will status indicators STAT and DC OK can
charge a single cell Li-Ion battery be configured to show charge in
from either a wall adapter or a USB progress, battery fully charged and
power source. A low under-voltage external power on. The STAT pin is
lockout level increases usable capable of sourcing or sinking 5mA.
charging range from a current limited The _{DC OK} output is an open drain
power source. In addition, there is a _{output and can sink 10mA.}
linear die temperature thermal control _{The LX2208 enters a low quiescent}
loop, which limits the heat dissipation _{current shut down when power is}
while still charging the battery. There _{removed from the IN pin or when it is}
are three logic selectable and _{logically shutdown to minimize battery}
programmable charge current levels: _drain.
the high charge programming level is _{Protection features include: under}
typically set for charging from the _{voltage lock out, reverse current}
wall adapter, the low level charge _{blocking on the IN pin, internal die}
programming is typically set to _{temperature thermal loop to reduce}
500mA for full USB charging and _{charge current to maintain a safe die}
100mA (20%) for reduced USB _{temperature, and a unsafe battery}
charging.
temperature charge inhibitor. For
In addition to setting the high-level _{charging deeply discharged batteries,}
charge current, the HCP programming _{the controller includes a conditioning}
resistor also sets the termination _{charge mode. The LX2208 comes in a}
current at 10% of the constant current _{3x3mm 12 pin MLPD package.}
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
ƒ Up to 2A Charging Current
ƒ Integrated Power MOSFET
ƒ Three Charge Levels for
Adapter, and USB Hi and Low
ƒ Charge Battery from a Current
Limited Adapter
ƒ 0.5% Battery Voltage Accuracy
ƒ USB Current Compliance
ƒ Battery Full Indicator
ƒ CC/CV with Thermal Feedback
ƒ Battery Temperature Monitor
ƒ Precision Charge Termination
ƒ Protection features:
o Unsafe Battery Temp Lockout
o Internal IC Temp Regulator
o USB Current Limiter
o Reverse Current Blocking
o Under Voltage Lockout
o False Termination Prevention
under Low Supply Conditions
APPLICATIONS
ƒ Navigation Devices
ƒ Multi-Media Players
ƒ Handheld Devices
ƒ Digital Cameras
PRODUCT HIGHLIGHT
Adapter or USB
Adapter or USB
Select
Shutdown
USB Hi/Low
Current
Programming
Status
Charging
IN
STAT
CMP
H/L
DC OK
SD ^LX2208
TMP
20%
BAT
HCP
LCP _GND
+
-
Battery
Full
Power On
Battery
Temperature
Lockout
Sensing
PACKAGE ORDER INFO
T_A (°C)
-40 to 85
LD ^{Plastic MLPD 3 x 3mm 12 pin}
RoHS Compliant / Pb-free
LX2208ILD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2208ILD-TR)
Copyright © 2007
Rev. 1.0, 2007-04-03
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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