Halogen lamp PSU keeps burning fuse !!

[selldoor]

Re: Halogen lamp PSU keeps burning fuse !!

Ok so I dont know - others hopefully will - but I think what you have there is
an electronic ballast/starter for a fluorescent lamp.
It could be 24v but if the man had it running on 230v that could be right also.
Have a look at this - tells how to build one (for 110vac ) but says what to change to make it 230vac
http://homemadecircuitsandschematics...watt-tube.html
I dont know much about circuits but budm and the others may help.

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

Thanks selldoor for that PDF file .

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

nasty,
if it's for driving a tube it will have a very high voltage startup followed by a current regulated constant drive.

anybody got schems for an electronic flourescent starter while on the subject?

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

nasty,
if it's for driving a tube it will have a very high voltage startup followed by a current regulated constant drive.

anybody got schems for an electronic flourescent starter while on the subject?

But there is only 50V caps on primary side , also when i read the sticker under the PCB there is 36 v to 42 v 55w on it.

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

i cant explain that, i just know how flourescent tubes work.

you need an arc to get them started, then you need to regulate the current or they will destroy themselves.
only other way is to use 4 wires to power the tube heaters.

[budm]

Re: Halogen lamp PSU keeps burning fuse !!

Can we see the whole bottom side of the board?
BTW, so this board is removed from inside the lamp assembly as shown in the PDF catalog?
Can we see the lamp assembly?

[selldoor]

Re: Halogen lamp PSU keeps burning fuse !!

nasty,

anybody got schems for an electronic flourescent starter while on the subject?

Hi stj - did you see my post at the top of this page there is a link on how to build one with a board layout board showing the tracks and parts list?

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

no, that's a ballast, i just want to replace the traditional starter,
like the pulse-starters you can get in shops.

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

Can we see the whole bottom side of the board?
BTW, so this board is removed from inside the lamp assembly as shown in the PDF catalog?
Can we see the lamp assembly?

The PDF file includes PSUs with 24 Vac supply , witch confirmes the writing on the sticker 36-42v 55W .

When i was giving it 230 volts the starter resistors where burning slowly , the caps also were getting hot .

I wonder how those caps are still alive and they are apparently of bad quality .


Here is some shots :

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

i see how that wrorks now - pretty simple but nice design.
i suspect the 42v input is for use on a ship or plane.

the output is going to be over 300v at probably over 50khz ac.

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

i see how that wrorks now - pretty simple but nice design.
i suspect the 42v input is for use on a ship or plane.

the output is going to be over 300v at probably over 50khz ac.

But 42 v is the output of this PSU , 24 V ac is the input .

This PSU is outputting two 42 v to be connected to the CFL . (AFAIK)

[selldoor]

Re: Halogen lamp PSU keeps burning fuse !!

If you have it I think budm was wanting a picture of the next part of the puzzle the bulb connector so he can see how the bulb is wired through to this board. Do you have access to a bulb - does it say on it what voltage/ wattage it is.

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

If you have it I think budm was wanting a picture of the next part of the puzzle the bulb connector so he can see how the bulb is wired through to this board. Do you have access to a bulb - does it say on it what voltage/ wattage it is.

No problem .

Tomorrow i will meet the guy who gave me this and ask him for more details.

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

it's not 24v input, it's a custom 42v input.
the output is hundreds of v to drive a tube.

and because you put 230v into it, i'd be worried about a lot of parts including the 2 large caps, the zener diode marked 15v and the 2 small transistors that drive the fets.

[stj]

Re: Halogen lamp PSU keeps burning fuse !!

btw, i hope you werent shorting the outputs with a halogen bulb!!!

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

btw, i hope you werent shorting the outputs with a halogen bulb!!!

Sorry , am getting a little confused here .

Do you mean that this psu outputs 42 volts to another device that energizes the cfls up to 300 V ?

As for that mistake , the guy insisted that he was powering it up with 230 , maybe he was using a transformer to step it down to 24 for the smps then using this 42 output for another device that lights up the cfls.

[selldoor]

Re: Halogen lamp PSU keeps burning fuse !!

We are all a bit confused it is no good keep guessing - have your conversation with the guy you got t off then come back and tell us if possible.

What bulb did it light ( who mentioned halogen)
If it has ever been seen lighting a lamp what voltage was applied, mains or what voltage if by an adapter.
Also get more pictures of the rest of the unit and bulb.

Perhaps try and get some part numbers off the components Q1 Q2? that may give us more clues.

Also When you said the resisters were getting hot did you mean the 4 black diodes one of them
D72 looks to have damage?

[SM-Piyes90]

Re: Halogen lamp PSU keeps burning fuse !!

We are all a bit confused it is no good keep guessing - have your conversation with the guy you got t off then come back and tell us if possible.

What bulb did it light ( who mentioned halogen)
If it has ever been seen lighting a lamp what voltage was applied, mains or what voltage if by an adapter.
Also get more pictures of the rest of the unit and bulb.

Perhaps try and get some part numbers off the components Q1 Q2? that may give us more clues.

Also When you said the resisters were getting hot did you mean the 4 black diodes one of them
D72 looks to have damage?

I will get beck with news for sure .

the two mosfets are IRF540 btw . i read their datasheet they are 100v/30A .

[budm]

Re: Halogen lamp PSU keeps burning fuse !!

I believe this unit takes 24V (If you look at the GIMAX catalog, they make the unit that will take 12V, 24V, and 230V).
230V feeding into the unit probably damaged lots of components by now.
If you look at the output terminals, you will see that the filament of lamps are connected in series with that big gray cap, so it is filament type start up.
BTW, I found this web site for the CFL circuits.

[selldoor]

Re: Halogen lamp PSU keeps burning fuse !!

@budm It also says in the catalogue that they can supply units for different voltages
on request - so these may be "specials" given the "42v" suggested on the sticker.