SE9022 Datasheet, PDF (4/7 Pages) Seaward Electronics Inc. – Standalone Linear Lithium Battery Charger

Pin Functions
Pin
Pin Function Description
Pin
Pin Function Description
P Positive Input Supply Voltage. Provides power to the
Vin charger. Vin can range from 4.75V to 6V and should
be bypassed with at least one 1μF capacitor.
BAT-
Charge Current Output. Provides charge current to the
battery and regulates the final charge voltage to 4.2V.
SE9022 will automatically identify the polarity so this pin
can be connected to BAT+ also.
GND
Ground.
LED1
LED1 sinks 10mA, or ON, when the Lithium battery is
successfully connected to the IC. A series resistor is
advised if the LED needs smaller current.
BAT+
Charge Current Output. Provides charge current to
the battery and regulates the final charge voltage to
4.2V. SE9022 will automatically identify the
polarity so this pin can be connected to BAT- also.
LED2
LED2 is the Charge Full LED driver.when the battery is
full,LED2 will ON．It would source 10mA to a LED
connected between this pin to GND. A series resistor is
advised if the LED needs smaller current.
LED3
The LED3 will flash at 4Hz frequency during
charging. When the battery is full. LED3 will be
pulled high, and the LED will be OFF. If the LED
needs smaller current, a series resistor is advised..
NC
With DIP-8 package NC is the unused PIN
Typical Operating Characteristics
Revision 11/1/2010
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2010. • www.seawardinc.com.cn • Page 4