Could 3 CCFL inverters run off one High powered GPO?

Johnny · Post by **Johnny** » Tue May 25, 2004 3:09 am

Quick question to one of the MO guys.

Could I safely connect 2, possibly three, CCFL inverters (powering 6 CCFL tubes) off one high powered GPO?

Specification of Inverter
Input Voltage : DC 12 V
Output Current : 5 mA

Specification of CCFL
Voltage: 570

Dgephri · Post by **Dgephri** » Tue May 25, 2004 10:29 am

I was doing some searches on this very question over the weekend. What I discovered was:
Most inverters note an input voltage and output current exactly or close to what you show, however, remember an inverter is trading of DC input to output high voltage AC.

As I searched more and more, i finally found some specs-
input Voltage 12V input CURRENT- 550mA
Output Voltage 1500VAC Output Current 5mA.
Linkage from j-right
J-right inverter page
Note model YLY(D)B-2

But if you can confirm that you have a YLY(D)A-2, then you should be okay.

So, from what I can gather, the bulb itself only takes 5mA, but the inverter is drawing 550mA to power up the Voltage transformers.

I decided it was NOT a good idea to try 2 on one hGPO. But if you try it, let me know if it worked

.

I'm going to get some more 3Amp relays and solder them up to run from the 5V GPOs.

Miles · Post by **Miles** » Tue May 25, 2004 3:09 pm

There again it depends on the type of CCFL inverter you choose. You will find that they vary for input current draw from model to model. I've tried two different models here at work and one drew 390 mA and the other only 300mA. Basically if your under that Max 1Amp cap you'll be okay, however I would prefer that you stay around the 500mA. The reason I say this is because the spike current at start up may be enough to damage the transisitor...