Rev1.0

Preliminary and all contents are subject to change without prior notice

© Seaward Electronics Inc., 2013. • www.seawardinc.com.cn • Page 1

SE9018

1A Standalone Linear Li-lon Battery Charger

Typical Application

Description

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.

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.

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.

Features



Programmable Charge Current Up to 1000mA



No MOSFET, Sense Resistor or Blocking

Diode Required



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



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



Application



Charging Docks and Cradles



Cellular Telephones, PDAs, GPS



MP3、MP4 Player



Digital Still Cameras, Portable Devices



USB Bus-Powered Chargers, Chargers