What makes a COB LED light up on 14v?
Missing boost converter/current regulator – without this a COB LED won’t even light up on 14V (board voltage is 14V in a car!), most reach their nominal current at more than 30V due to the series connection of the individual LEDs on the lattice. Missing heat spreader and heatsink – you need this.
How does a 12V campervan get its power?
When you plug your RV into mains power, it has an internal converter that downconverts to the 12VDC to run all of your low-power stuff (lights, vent fans, radio, etc.), so that shouldn’t have any noteworthy effect on this problem. Thanks for contributing an answer to Electrical Engineering Stack Exchange!
Can you connect a second led to a campervan?
No heatspreader board, no circuit. And the form factor doesn’t even match so you cannot put this on the original board. You cannot connect this second LED to your car. It will not work/blow up in an instant for two reasons:
Can a COB LED be connected to a car?
You cannot connect this second LED to your car. It will not work/blow up in an instant for two reasons: Missing boost converter/current regulator – without this a COB LED won’t even light up on 14V (board voltage is 14V in a car!), most reach their nominal current at more than 30V due to the series connection of the individual LEDs on the lattice.
Can a constant current driver power a COB LED?
A constant current driver output voltage can be greater than the CoB V f. The output voltage is a function of the CoB’s V f. Your supply is a constant voltage supply. They do not work well with LEDs. They can be used to power inexpensive ($2-$5) constant current DC/DC converters.
What kind of power supply do I need for a led?
There is not many CoBs available between 18 and 24 volts. You can use a supply with a voltage higher than 24v. You have to look at the datasheet for worst case maximum forward voltage which is probably around 27v. You then may need a few volts headroom for the LED driver.
What’s the voltage drop on a 12V led?
So, from that upper value, we get that over the resistor would be a voltage drop of 14 V – U_LED = 2 V, and divide that by the 300 mA current, we get R_min = (2/0.3) Ω = 6.67 Ω. At the 180 mA, that resistor would still have a drop of 1.2 V, which feels “tolerable” for a 12 V LED.