EV5103 Datasheet, PDF (4/4 Pages) Global Mixed-mode Technology Inc – G5103 White LED Demo Board V1.0

Global Mixed-mode Technology Inc.
How to Use This Demo Board
EV5103-10
LED driver circuit only
in red rectangle
Other circuit is for
PWM dimming control
demonstration.
J1:
SW1:
SW2:
SW3:
JP1:
LEDs:
Fig.2
is an input power connector. +BAT means positive side. The valid voltage range is from +3.0 to
+5.5V. one cell Li-Ion battery or 3 cell NiCd or NiMH battery or adjustable power supply are good
power source.
is a push button switch, every click makes LEDs a little darker until 100% light.
is a push button switch, every click makes LEDs a little lighten until full dark.
is a push button switch, every click change dimming PWM frequency from 200Hz Æ 210Hz Æ
220Hz Æ 230Hz Æ 240Hz Æ 250Hz Æ 150Hz Æ 160Hz Æ 170Hz Æ 180Hz Æ 190Hz Æ 200Hz.
But the change could not be observed be human eyes. Only a oscilloscope could shows the
difference.
is a jumper, which must be close for normal operating. You should open this jumper to measure
input current if you want to measure the efficiency of this demo board.
LED1 ~ LED4 has solder with white LED.
Jan 21, 2003
TEL: [phone]
http://www.gmt.com.tw
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