Revision 11/2/2010

Preliminary and all contents are subject to change without prior notice

© Seaward Electronics Inc., 2007. • www.seawardinc.com.cn • Page 5

Typical Operating Characteristics

Vbat Versus Ibat

3.0

3.2

3.4

3.6

3.8

4.0

4.2

4.4

0

50

100

150

200

250

Ibat (mA)

Application Notes:

_

BAT+

4.75V~6V

BAT-

+

LED2

LED1

SE9020C

R1

600

BAT-

GND

Vin LED2

LED1

BAT-

Figure #1. Flashing 7-Color LED Application.

SE9020C also supports 7-color LED applications. The LED2 is

Flashing LED.The Logic of LED’s is shown in the table below.

Detection

Description

Power Supply

Condition

Battery

Condition

LED1

LED2 (7-color)

Disconnected

Connected

ON

OFF

Battery Detection

Connected

Disconnected

ON

OFF

Battery Unload

Disconnected

ON

OFF

Battery Charge

ON

Colorful

Battery Full

Connected

Connected

ON

OFF

Battery Shorted

Shorted

OFF

OFF