12V DC to 200V DC 100W Design

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hello,

Looking for a design for a converter from 12 or 24Vdc to 200V DC @0.5A.
Any one has a design?

Sincerely,
Giora
 

Hi Giora
It is simple use SG3525 PWM feed the outputs to Pushpull Mosfets drive a ferrite transformer get the desired output. I can help while you design.
 

Hello picgak,
Can you recommended for the Pushpull Mosfets and the ferrite transformer?
 

Hi Giora,
If you are using 12V Then IRFZ44 is a good choice. ETD34 ungapped core is a good choice fore ferrite transformer
regards ani
 
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    z_mx

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Looking for a design for a converter from 12 or 24Vdc to 200V DC @0.5A.
Any one has a design?
Click to expand...

Hi Giora
You'll have many of the choices for going through . e.g : boost convert / flyback converter / forward converter ...... etc
If precision is not important for you a Royer oscillator can also be used
Best Wishes
Goldsmith
 
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    tpetar

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goldsmith said:
Hi Giora
You'll have many of the choices for going through . e.g : boost convert / flyback converter / forward converter ...... etc
If precision is not important for you a Royer oscillator can also be used
Best Wishes
Goldsmith
Click to expand...

Hello goldsmith,

Can you send a schematic example. Precision is important. Also PCB Board area is important.
 

Hello goldsmith,

Can you send a schematic example. Precision is important. Also PCB Board area is important.
Click to expand...

Hi Giora
Ok , i think links which Peter has presented can suit your aim and they are much better . so you can go through them and then if you had any problem ask us then we'll guide you .
Best Luck
Goldsmith


Hi dear Peter
Perhaps you won't believe this but all of the times that you are presenting a link i'm sure that your presented link is the most interesting one and i can learn something from that too . :-D

Best Regards
Goldsmith
 
Last edited:
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    tpetar

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Hi peter,

Thanks for the information.
Really I do not need 220V Ac 50Hz.
The output should be DC and can "give" 0.5A continuesly.
The output is connected to a laser driver board with this spec:
100A pulse
~20ns FHWM
100Khz repitition rate.

Giora
 

so you are driving laser diodes in pulse mode?

if you don't need small size, just use constant off time boost converter....or interleave two if you want better efficiency
 

treez said:
so you are driving laser diodes in pulse mode?

if you don't need small size, just use constant off time boost converter....or interleave two if you want better efficiency
Click to expand...

Unfortunately I need a small size.
Any schematics that can help me?
 

The size is limited by the ferite transformer. So use higher frequency in the smps to reduce the transformer size.
 

The size is limited by the ferite transformer. So use higher frequency in the smps to reduce the transformer size.
Click to expand...

Hi Ani
of course higher frequency will deal with more dissipation in SMPS . so sometimes it is not possible to increase the frequency .

Unfortunately I need a small size.
Click to expand...
What if you mention your maximum allowed dimensions ?


Best Wishes
Goldsmith
 
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    tpetar

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goldsmith said:
Hi Ani
of course higher frequency will deal with more dissipation in SMPS . so sometimes it is not possible to increase the frequency .


What if you mention your maximum allowed dimensions ?


Best Wishes
Goldsmith
Click to expand...

Hello,

I was thinking on 5cm X 5cm two sides of the board.

Giora
 

Well I ca manage with 15mm on the top side and 5mm on the bottom side.
Any schematics proposal?
Click to expand...
Hi Giora
Your allowed dimensions are nearby the boundary ! it wont' be so simple to do it with such a low dimension . if the precision is important the simplest and lowest size method is only using TOP integrated circuits . however there is another way too which called self oscillated flyback converter which doesn't use any IC and it is just transistor . did you ever heard of it ?

Best Wishes
Goldsmith
 

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