LED22V1A ETC, LED22V1A Datasheet - Page 2

• Manufacturer Part Number: LED22V1A
• Description: HIGH Efficiency LED Controller
• Manufacturer: ETC

When using multiple LED22V1A2DW units within one system, it would be better to have all their
switching frequencies synchronized, thus minimizing the ripple voltage across the power supply and
interferences to other electronics. Two ways to synchronize their switching frequencies:
1. Use an external clock signal of between 750KHz to 1MHz and connect it to the SYNC pins (#1) of all
2. Use one of the LED controllers as a master unit (ordering part number: LED22V1A2DWM) and the rest
Figure 1 shows the connection for typical applications. Please note that all the optional connections are not
necessary for the controller to operate. The circuitries shown inside the controller boarder are the internal
circuits embedded in the controller. Figure 2 shows the top view of the controllers and its connection
wires, the POT, and the soldering pads for the optional connections.
550 E. Weddell Drive, Suite 4, Sunnyvale, CA 94089. U. S. A. Tel.: [phone], Fax: [phone]. www.analogtechnologies.com
Copyright 1999 – 2004, Analog Technologies, Inc. All Rights Reserved. Updated: 10/28/04
the controllers.
as slave units. Connect the VSW pin (#3) of the master unit to the SYNC pins (#1) of all the slave
units.
Power Supply 7V to 22V
Switching Signal Output
Analog Technologies, Inc.
External Dimming Control
External Clock Signal
Power Supply 0V
Connection Wires
(Optional)
(Optional)
(Optional)
Soldering pads
Figure 1 Typical Application of LED Controller LED22V1A2DW
4.99K
R1
3
(Optional)
Switch
On/Off
S1
W1
5K
1
2
2
3
4
5
6
7
1
SYNC
SDNG
VSW
2.5V
LIS
CW
Figure 2 Top View
GND
VPS
1
2
3
4
5
6
7
SYNC
SDNG
VSW
2.5V
LIS
GND
VPS
16.7
0.1 mm
2
2
1
LED22V1A2DW
R2 10K
R3 10K
RS 50mOhm
LDA
LDC
Control Input
CW (Clock-Wise)
POT
1
1
2
9
8
2
16 0.1 mm
10K
W2
LEDA
LEDC
9
8
LED22V1A2DW
1W to 5W
0 to 1A
LED
2/4