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Use pulse mode. If the output is only on when you need it then you can dramatically reduce
the heat output. Feed the camera trigger into the PP420 and pulse the lights.
•
Turn the light off when not needed. If you don't have precise timing of when the camera
will trigger, you can use Switched mode to switch the output off or on depending on the
trigger input (or use the PP420 and use Ethernet commands to turn the output on and off).
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Reduce the output current if possible
•
Reduce the supply voltage. Most PSUs have some adjustment in their output voltage.
•
Connect lights in series instead of parallel. If you have an array of lights or LEDs in
parallel then changing the arrangement to serial will increase the voltage across them but
reduce the overall current.
•
Use two PP420s and use one channel from each. For high power applications this may be
the easiest solution. Even with one light, it is possible to parallel up two output channels
from different PP420s.
•
Use a PP820. These controllers can dissipate much more heat.
If the heat output is no greater than 8W, then no heatsinking is required. If the heat output is
between 10W and 24W then the PP420 needs to be bolted to a solid piece of metal to dissipate
the heat. Above 24W, it is necessary to have a large heatsink with fan cooling.