-30V Supply for diode

[slowertech]

Hi,

I need to create a -30V voltage rail for a diode I want to use but I am having trouble creating that.

I have attached a schematic for something I had put together but I do not seem to be able to get it to output what I need, I am actually getting ~3V.
I had used the formula within the datasheet to figure out the value for R4 that I would need to get -30V.
Maybe someone will see something obvious that I have glossed over or has an alternative part I could try?

The part I am using is an LT1372HVCS8#PBF and the datasheet http://cds.linear.com/docs/en/datasheet/13727fbs.pdf

Thanks!

[Zero999]

I need to create a -30V voltage rail for a diode I want to use but I am having trouble creating that.

That seems like an unusual thing to do.

What sort of diode is it?

Please post a schematic of what you're trying to power. It's possible there's an easier way to do this.

[slowertech]

I have attached a schematic with how the circuit is set up.

The part is a Silicon Photomultiplier from SensL.

The part I am using is ArrayJ-60035?4P-EVB
http://sensl.com/estore/arrayj-60035-4p-evb/

The documentation for the part
http://sensl.com/products/j-series/

[daveshah]

This was my SiPM bias circuit, if you're curious



See the full writeup here: https://ds0.me/sipm/index.html

[capt bullshot]

Does it work if you swap the output pins of the transformer?
The polarity isn't indicated in your diagram, must be correct for the circuit to work

[slowertech]

daveshah,

Thanks that is awesome! I will actually look through that later today when I have down time later today.


capt bullshot,

I was looking at it early this morning and noticed I completely messed up the pin positions for the transformer, also noticed I did not have the part number in the schematic. Sorry about that.
The transformer is part: CLS62NP-100NC
I will correct it today and poke around with it a bit and update.

Thanks!