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switching PS +/-15V dc

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alsoleda

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switching ps

Could anyone have a design of switching power supply with these parameters:
input 220Vac
output +15Vdc (3A) and -15Vdc (3A).
thanks
 

transistor 15v base

Why dont u design yourself.Just go to Power integration site.They have PI expert software U can design easilly
 

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    alsoleda

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switching p s

alsoleda said:
Could anyone have a design of switching power supply with these parameters:
input 220Vac
output +15Vdc (3A) and -15Vdc (3A).
thanks
Click to expand...

Try this circuit with a little change of output circuit (Tx etc).

CIRCUIT

ENJOY!
 

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    alsoleda

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switching power supply 15 vdc 220 vac circuit

I often repair switching PS
now,I have problem with my switching power supply
input 220Vac
output 5Vdc (4a), 24Vdc (2a)

plug in 220Vac but no Vdc output,
I check switching transistor BUV48--->die,(the oscillator output to base pin of BUV48 is ok)
now I don't have this Trans to replace in my location, so can anybody show me another one equivelent.
BUV Vce=1000Vdc
Ic = 20A
and can you show my the internet site to search electronics components

ex: I don't know the name of transistor but I know its characteristic (Vds =1000Vdc, Vgs=5v, Rdson=...)
so I only enter the value of Trans in need,the web find the name of my trans.
thanks
 

switching ps

alsoleda said:
I check switching transistor BUV48--->die,(the oscillator output to base pin of BUV48 is ok)
now I don't have this Trans to replace in my location, so can anybody show me another one equivelent.
BUV Vce=1000Vdc
Ic = 20A
and can you show my the internet site to search electronics components

ex: I don't know the name of transistor but I know its characteristic (Vds =1000Vdc, Vgs=5v, Rdson=...)
so I only enter the value of Trans in need,the web find the name of my trans.
thanks
Click to expand...

If it is BUV48, it is a Silicon power BJT Transistor, having Vceo=400V and Ic=15A etc there are many similar transistor as shown, now see whether available or not in ur location
 

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    alsoleda

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power supply input 220v dc 15v

thanks Awara
but could you show the site to find these transistor or software?
I really need it
 

15vdc 3a power supply

The file you have seen in my previous post is not from any web site, its a software (~80GB). However you can download another one I have posted at THE POST

ENJOY!
 
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    A

    alsoleda

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+/- 15 vdc power supply

thanks Awara,
I've tried your software,it's useful.
May i have a word

+In your main menu, for me, the parameter Vce is important than Vcb
+maybe, additional parameter is possible, such as, IC package (TO126,...).
when you're looking for the equivalent trans, there are a lot of Trans to choose but the size is so different so it's hard to replace.
+could you up to date your transistors and maybe, including FET.

I replace BUV48 by 2SC3997. there are pulses at base pin of transistor but no Vdc output, maybe the trans isn't working.Could anybody find out the problem?
 

Yes alsoleda

Vce is important, actually I press PRT-SCreen command to obtain the pic of the equivalents, however the software shows all the parameters (approx) of the devices including package etc, but for that I have to scroll left to show, I only give a list with few parameters.
 

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