SE9018
1A Standalone Linear Li-lon Battery Charger
Description
Features
Programmable Charge Current Up to 1000mA
No MOSFET, Sense Resistor or Blocking
Diode Required
The SE9018 is a complete constant - current &
constant-voltage linear charger for single cell
lithium-ion batteries. Its PSOP8 package and low
external component count make the SE9018
ideally suited for portable applications. Further
more , the SE9018 can work within USB and wall
adapter.
Complete Linear Charger in SOP-8 Package
for Single Cell Lithium-Ion Batteries
Constant-Current/Constant-Voltage
Charges Single Cell Li-Ion Batteries Directly
from USB Port
No blocking diode is required due to the
internal PMOSFET architecture and have prevent
to negative Charge Current Circuit. Thermal
feedback regulates the charge current to limit the
die temperature during high power operation or
high ambient temperature. The charge voltage is
fixed at 4.2V, and the charge current can be
programmed externally with a single resistor. The
SE9018 automatically terminates the charge cycle
when the charge current drops to 1/10th the
programmed value after the final float voltage is
reached.
Preset 4.2V Charge Voltage with 1.5%
Accuracy
Automatic Recharge
Two Charge Status Output Pins
C/10 Charge Termination
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available Radiator in PSOP8 Package, the
Radiator need connect GND or impending
Application
Charging Docks and Cradles
SE9018 Other features include current
monitor, under voltage lockout, automatic recharge
and two status pin to indicate charge termination
and the presence of an input voltage.
Cellular Telephones, PDAs, GPS
MP3、MP4 Player
Digital Still Cameras, Portable Devices
USB Bus-Powered Chargers, Chargers
Typical Application
Rev1.0
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2013. • www.seawardinc.com.cn • Page 1