PhlatLight ? DK-409N Series Development Kit Manual
4.3
Operation in PWM Mode
1. Set the maximum desired current to the LED by following step 4.1
2. Set Switch SW3 to “PWM” Mode
3. Use switch SW2/4 to select the “POT” position for using the on board Potentiometer R21 to
control the PWM settings or the “EXT” position for using an external analog voltage on J7 in
the range of 0 – 10V to control the PWM settings
a. In the “POT” setting the LED D7 will illuminate indicating that the driver is using the
on board Potentiometer for PWM control
b. In the “EXT” setting the LED D8 will illuminate indicating that the driver is expecting
an external voltage on J7 for PWM control
J7
SW2/4
R21
SW3/5
SW1
Figure 4: Driver Locations for SW1, SW3/5, SW2/4, R21, J6 and J7
960018 Rev A ? 2008 Luminus Devices, Inc. All rights reserved.
J6
Page 7
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