LED power supply

[skot_e]

Hi All

I'm in the process of some renovations and looking to power several RGB LED strips (the ebay kind). Rather than having seperate transformers for each strip, I was thinking about using a distribution box. The box has 9 outputs with each PTC protected and rated at 0.8A

I want to understand the details of the dist box ratings better.

Box specs are:
Input Voltage: AC 100~240V 50-60Hz
Output Voltage: DC 12V ADJ 11-14V
Output Current (1-9): 7.5A, Peak Value: 10A
Output Power: 90W, Peak Value: 120W

Each LED strip runs off a control unit with a max output current of 6A - enough to control 5m strip (300 LED) or less.

So my question is, would this distribution be unsuitable? And if so, could it be modified to provide higher current to each output? I have seached for schematic to no avail.

I have a similar unit currently used for CCTV power distribuiton, and one single strip of LED worked fine on a test for a short period (30mins). So the box is enough to power one 5m strip on one output. What is confusing me is the 0.8A continuous vs the max load of 7.5A. And what impact is the 6A draw for this.

Seeminly to me, 6A is too much for the individual oputput, but it did work so...

 

[moamps]

The total current you can get from the CCTV power supply is 7.5Amps (9x0.8A), so you can use it for supplying only one RGB LED strip which draws usually 6A for 100% all three colors.
I would use few power supplies, one for each room or zone (for example, one for kitchen with 2 strips, one for a room with 5 strips, etc..) Each power supply should be rated according to the number of connected strips.

 

[skot_e]

Hi Moamps

Thx for the reply. I'm no electronics whiz but I'm assuming there is a resistor in the circuit to reduce the current rating to each of the 9 outputs. This is why it seems strange that I was able to have one of the strips function in testing. I wouldve thought that if the output is rated at 0.8A then the 5m strip should not light up.

This leads me to assume I should be able to modify the circuit to increase the current permissable for each output. Either removing or replacing the PTC with a higher rated value is probably required, not sure if that would be all needed.

Unfortunately as I said I can't find the schematics for this distribution.