I have an LED downlight in the camper we just bought but unfortunately the module inside is dead. I would like to replace it with another LED module/chip for cheap.
The light we have: http://www.pro-car.de/en/products/led-lights/surface-mounted-power-led/surface-mountedbuilt-in-power-led/
Dead module: 
I have purchased this.
The camper circuit is run from a 12 V "leisure" battery.
It seems the light is on an independent switched circuit.
My logic has lead me to purchase the 12V COB LED commented with the hope to just directly connect it to the circuit where the previous module has been removed.
After further research I am confused with a few questions…
- Does the LED require a resistor and/or LED driver to safely operate OR
- a) does it already have this built into the chip.
- b) it doesn't require either as it is rated to 12V.
- What happens when the camper is plugged into a site and we have full mains power?
Any suggestions to cheap suitable drivers or alternative replacement LED module/chip are welcome.
Best Answer
Tom, your first photo shows a complete lighting circuit with a heatspreader printed board circuit and the COB LED and its boost converter/current regulator on it, while you second photo shows only a COB LED. 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:
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. Without a heatsink and spreader, the LED will heat up itself to destruction within a second.