Linear power supply for 100W LED...2 questions.

[petelms]

Hello!

I have two questions:

1.) Is it possible to have a linear power supply for 100W led like this Yuji-led? I have only found switching PSUs.

YUJILEDS® CRI 95+ High Power 100W Flip Chip COB LED 3200K 5600K - 160H5600K / 1pc

YUJILEDS high CRI high-density 100W LED COB provides 95+CRI high quality light and 6000lm output on a tiny φ9mm surface. It is more compact and denser than most existing COB packages on the market and is perfect for all applications requiring high quality light enviroment.

store.yujiintl.com

Here's the datasheet:

https://cdn.shopify.com/s/files/1/0344/6401/files/YJWJ020-1.1_YJ-BC-160H-G01.pdf?8015580825686102054

I would like to get totally rid of the electromagnetic interference and switching power supply. I would need DC-DC PSU, not AC.

2.) Would it be possible to use that 100W Yuji led with two normal 12V batteries (24V)?

Forward voltage seems to be 23V-27V.

What happens if I just put two 12V batteries together to get 24V and put it straight to the 100W led? Do I need some resistor in between?

Thanks!
, Pete.

 

[kellys_eye]

The simplest form would be a dropper resistor (you can't use a battery directly without one) but this is inefficient due to the heat loss in the dropper resistor - but if that's what you're prepared to accept then go for it!

You can, of course, buy, build (or design) a constant current or constant voltage power supply that is more efficient than a simple dropper resistor.

A 100W LED arrangement would require a current of some 5A from a 24V battery setup that makes the idea of battery operation somewhat questionable if you want to run it for any length of time.

Then again a 'decent' SMPS type power supply should have little noise/interference - you pays your money.......

 

[Bluejets]

At those prices, one could buy a complete light fitting with all the necessary drivers included.