Hi,
I am working on a project where I will use multiple LEDs like the 4-pin 3W RGB LEDs that I purchased on eBay (https://www.ebay.com/itm/124011607823). The specifications claim the following forward voltages: Red: 2.0-2.2v Green: 3.2-3.4v Blue: 3.2-3.4v. Each LED has a forward current rating of 700 mA.
i have been thinking of using an LM1084IS-3.3 voltage regulator (5A) for this project. I want to use 9 of these LEDs, which would require almost 19 amps!
i decided to test these numbers and I connected 1 LED (red only) to my bench power supply, set it at 2.1 V, connected my multimeter in series, and measured about 34 mA. The LED was full brightness (Blinding). I then tested the Green at 3.3 V, and measure 116 mA.
Can this possibly be correct? The datasheet states 700 mA but if it's only 116, that seriously changes the power requirements. Thanks for your help.
I am working on a project where I will use multiple LEDs like the 4-pin 3W RGB LEDs that I purchased on eBay (https://www.ebay.com/itm/124011607823). The specifications claim the following forward voltages: Red: 2.0-2.2v Green: 3.2-3.4v Blue: 3.2-3.4v. Each LED has a forward current rating of 700 mA.
i have been thinking of using an LM1084IS-3.3 voltage regulator (5A) for this project. I want to use 9 of these LEDs, which would require almost 19 amps!
i decided to test these numbers and I connected 1 LED (red only) to my bench power supply, set it at 2.1 V, connected my multimeter in series, and measured about 34 mA. The LED was full brightness (Blinding). I then tested the Green at 3.3 V, and measure 116 mA.
Can this possibly be correct? The datasheet states 700 mA but if it's only 116, that seriously changes the power requirements. Thanks for your help.