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Old 06-14-2015, 01:56 PM   #1
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Hi, I've got a question about LED's which I want to fit in wardrobes, those are small 3W Constant Current LED's that come together with small drivers, but the driver is capable of handling one light each, to make it neat and tidy I ordered some bigger drivers, but I might have made a mistake or there was a fault somewhere.

I wired them in series, starting with (+) from driver SEC to (+) in first light, then came with (-) from the same light to (+) in second one and continued with that until fourth light which (-) side came back to (-) in the driver, turned on the power supply for the driver and lights started flashing, so I added couple more as the driver operating range is 24-52V, nothing happened and lights went bust. I've done my calculation now, but trying to confirm.

The operating range of driver is 24-52V, so minimum 24V x 0.7A gives us roughly 17W~ divied by the wattage of lights gives us 6 lights, my question is, does that mean I need to wire AT LEAST 6 lights for that driver to properly operate those lights? Plus, any ideas why those LED's I've wired just broke down? I checked the wiring a couple of times, it seemed correct, it just seems strange, another things is if I need at least 6 lights, does that mean if one of them dies, the rest will stop working properly?

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Old 06-14-2015, 05:09 PM   #2
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What is the voltage and current ratings
Of both the original driver ?
And the replacement driver ?

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Old 06-14-2015, 07:29 PM   #3
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Quote:
Originally Posted by Signumcrucis View Post

Q - "I wired them in series "

A - I doubt that this is correct !
unless there is a big difference in voltage ratings
between the new driver and the old one !




Q - "The operating range of driver is 24-52V, so minimum 24V x 0.7A gives us roughly 17W".

A - Is this the ratings of the new driver ?
What is the rating of the old driver ?




Q - "any ideas why those LED's I've wired just broke down"
A - At this stage it appears the way you wired them is wrong.



Q - "does that mean if one of them dies, the rest will stop working properly?"

A - If you wire lights in series ? then that's exactily what happens when
one fails !
We need to know more info ?
namely the ratings of the ORIGINAL driver ?
And the ratings of the NEW driver ?

Some drivers can driver more than one light,
But they usually wire them in parallel NOT series !
And provided that the voltage ratings are the same
And it's within the drivers power rating !
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Old 06-14-2015, 11:57 PM   #4
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The old driver is a small one Constant Current 700mA driver, it does not state what is the voltage operation range of that one, when I tested it without any load it showed 12V on the SEC straight from the driver

The new one is a also a Constant Current 700mA, its voltage operating range is 24-52V, but doesn't wiring in series means that u are keeping the Current Constant but dividing the voltage in between LED's? or am I mistaking it for something else?
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Old 06-15-2015, 02:29 AM   #5
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Have you tested all four lights to see if they are ok ?
Test them with a 12v supply or battery.
If ok ?
Try wiring just two lights in series.
Turn on and quickly measure the voltage
Across each light
If it is close to 12v then your good.
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