0-10v dimming driver question

caretak3r

Well-Known Member
I picked up a driver with 0-10v dimming and haven't been able to test it out yet (still building the light array). It's a philips led-inta-0350c-425-do. Should I expect minimum amperage without a 10v power source connected to the dimming leads or maximum amperage? I don't have a 0-10v dimmer yet and they don't seem to be as inexpensive as I expected.
 

Positivity

Well-Known Member
I picked up a driver with 0-10v dimming and haven't been able to test it out yet (still building the light array). It's a philips led-inta-0350c-425-do. Should I expect minimum amperage without a 10v power source connected to the dimming leads or maximum amperage? I don't have a 0-10v dimmer yet and they don't seem to be as inexpensive as I expected.
It should output full power without anything connected to the dimming wires.

All you need to set it up is a 10v source and a 10k potentiometer, It shouldnt cost too much..
 

caretak3r

Well-Known Member
It should output full power without anything connected to the dimming wires.

All you need to set it up is a 10v source and a 10k potentiometer, It shouldnt cost too much..
Thanks for the quick answer - will update after I get a test done.
 

stardustsailor

Well-Known Member
It should output full power without anything connected to the dimming wires.

All you need to set it up is a 10v source and a 10k potentiometer, It shouldnt cost too much..
10VDC DIM CIRCUIT.JPG

Pot: Can be of any value ,as total value is of no importance in a "voltage divider " .
But better to choose a pot of low value like say 10K ,because if you choose a large resistance ,
current flowing through will decrease and at low currents ,"RFI /EMI / digital noise pick-up" can be an issue.
May I suggest an expensive (~$10 ) multiturn ,linear ,high precision,low tolerance one ...
10K is fine.

Low limiter resistance: It's not a 'must' ,but better to be there .Set a low limit and not absolute zero.
(a 5K6 ,or a 6K8 or even a 10K ..)


-Turning pot CW ,more and more volts are applied to DIM+ .
Output current of led driver is increasing .
When pot wiper is at end (at +10 VDC ) then Io=max .
(it's like DIM+ is 'open ' )

-Turning pot CCW ,wiper moves towards DIM-/ common ground ( COM ) .
Output current of led driver is decreasing .
DIM+ AND DIM- tend towards 'shorting'...
When wiper reaches end then Io= 0 (if a low limiter resistance is not set ,of course )
Shorting DIMs is a bad idea,thus the low limiter res.

Caution: The 10VDC source must not exceed 11 volts at any case .
The source also must be able to 'sink ' about 500 μA (microAmperes ) per driver dimmed.

Cheers.
 

Positivity

Well-Known Member
Thats why i don't go into length..i just learned a bit myself.

I used a voltage step down converter on mine off of a 12v 2a open frame source...starting to wonder if the converter can handle the job?

Could just dial the main 12v supply down to 10v and lose a little fan speed...
 
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