RTxxx LED lighting controllers - User Manual
Mode
Trigger input
Output
Switched
Trigger = off
Trigger = on
Output is off
Output is on
Selected
Trigger = off
Trigger = on
Output is continuous bright-
ness 2
Output is continuous bright-
ness 1
Pulsed
Trigger rising
edge
Trigger falling
edge
Pulse is triggered if P flag = 1
Pulse is triggered if P flag = 0
In continuous mode the output current is fixed and continuous.
Switched mode uses a trigger input to switch the output on or off.
Selected mode uses a trigger input to select between the two different
brightness settings. Brightness 1 must be greater than brightness 2.
The P flag can be used to invert the trigger input.
The output current can be varied from 0% to 100% of full brightness.
7.2
Pulsed output
The output is off by default. When the RTxx is triggered, it waits for a
delay and then pulses the output. The delay, pulse width, retrigger
delay and pulse intensity are all configurable.
Retrigger delay is the minimum allowed time from one trigger to the
next. Any triggers that happen too soon after the previous trigger are
ignored. The retrigger delay is set in multiples of 100μs.
When connected to a light, the brightness can be set up to 1000% of
its rating, but only for short periods and at low duty cycles, so that the
lighting does not overheat and get damaged. The table below shows
the operating limits:
Output brightness
Maximum
pulse width
Maximum
duty cycle
0 to 100%
999ms
100%
101% to 200%
30ms
30%
201% to 300%
10ms
20%
301% to 500%
2ms
10%
501% to 1000%
1ms
5%
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