Req:HV power supply design guide

[goodboy_pl]

dear friends,
i am going to design a HV power supply with following specs:
Vo=6000V
Io=1mA
load regulation=5%
Vi=12V
i am familiar with switching power supply design,but until now it is my first experience in HV power supplies.
i think flyback topology and UC384x is the best solution; my problem is about the transformer design and construction,also i think there is some problem in feedback circuit(resistor voltage devider),so i will be grateful if u could help me.
all of your comments,tips,app.notes and design guides will be appreciated.

thanx inadvance.

 

[bomba]

This PDF, i found in TI seminar online
**broken link removed** is about deisign of inductor and flyback, is a good review of subject.
an example
http://focus.ti.com/lit/ug/sluu096/sluu096.pdf

There are more interesting pdf in this link, you can see it changing the number, example **broken link removed**, betwen slup067 to slup129.

 

[goodboy_pl]

I think it is better to share my old search results to others:

https://lhc-electronics-workshop.web.cern.ch/LHC-electronics-workshop/2002/Links/A52.PDF

https://lhc-electronics-workshop.web.cern.ch/LHC-electronics-workshop/2002/Links/A52.ppt

it is a clean and powerful design, u can use ferrite transformer in place of ceramic transformer used here to change its voltage/power!

BEST!

 

[mtawab74]

to generate high voltage i thiunk the normal flyback topology is not sufficeint as u will ned a huge number of winding in secondary

but as in TV horizentalor as in Spark ignition there's a good ways to generate those hiugh voltages

this way depends on resonance , wher the charged primary inductor in flyback transformer resonates with a capacitor between the collector and emitter of switching transistor those generating a peak voltage over primary windings which could be raised to the 6000 v with small turns ratiuo

i.e u can get about 1000 on primary by resonqance then step those 1000 to 6000 by 6:1 turns ratio



or u may connect the primary to the secondary at the collector so the primary current passes through higher inductance secondary generating higher voltage


this is my openion

also u should care about the isolation


also u may use voltage doubler