Step dimming (stepdim) – OSRAM OPTOTRONIC Constant current LED power supplies with 3DIM User Manual
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LEDset APPLICATIONS
3.1.2. Step dimming (StepDIM)
Based on the previous chapter (3.1.1.), the current setting
by resistor can be easily extended by an additional step dim-
ming function. By switching between two external resistance
values, the output current can be changed to two different
levels (i.e. one to set the nominal current to 100 % and one
to step down to 40 %). Shorting the Vset to GNDset allows
turning off the LED module while the ECG is still supplied
with mains voltage.
Possible solutions are shown in the following block diagram:
Figure 7: Step dimming by two resistor values.
For more information, please see the note on page 16.
7a: Manual solution.
7b: Relay-based solution.
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