# 12v rgb led strip

I have found a rgb strip given in this link http://www.sirs-e.com/st/strip-meters-p-2920.html?cPath=67

It is 12V, 24W, 2A strip. but again at the last he has given that 20ma per color. Both are not matching. With 20mA/color it needs 9A.

How it is possible.

pls give me sollution...

The 20mA per colour is the specification of the individual LED.

With a 12V supply it is likely that there are some LEDs in series and so the currents are not cumulative. That is if you have 3 LEDs in series with 20mA flowing through each the total current is 20mA not 20 * 3 = 60mA. It is only when the LEDs are in parallel that the currents add.

So it is safe to assume that this product takes 2A per strip.

k but in the strip 3 red leds are in series, 3 green leds are in series, 3 blue leds are in series and each series combination connected in parallel. so that we will have 150 series combinations(each color) in parallel.

2A current must be devided in to each parallel branch then what may be the current in each branch ?

If you have 150 identical circuits in parallel taking 2A in total then you have an individual current in each circuit of 2 / 150 = 13.3mA.

can you give me the internal led connections of rgb strip ?

Sorry I don't have that. It's simple enough to trace it if you have one to hand.

what may be the max current required for a rgb strip ?

i have 12v rgb strip but i dont have its manual, how can i know the current required for that strip ?

The Strip is divideable. Every "3LED"-part takes 3x20mA per color. A whole meter/inch/kilometer/lightyear takes the 2A.