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Switchig power supply....

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Rfboy

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1000w mc34262

Hi, I'm looking for a project or information about a switching power supply with these caracteristics:
- Input : 110-260 Vac
- Output : 48 Vdc 18 A
with PFC.

Thank you
 

S

sick_man

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mc3842 power supply

you can modify a standard computer supply by changing a few components
to be satisfactory
 

haymeron

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mc3842 smps pdf

On 2001-05-02 03:43, SIMBOX wrote:
you can modify a standard computer supply by changing a few components
to be satisfactory
put your email i will send you pdf files.
haymeron@hotmail.com
 

haymeron

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On 2001-05-01 23:18, Rfboy wrote:
Hi, I'm looking for a project or information about a switching power supply with these caracteristics:
- Input : 110-260 Vac
- Output : 48 Vdc 18 A
with PFC.

Thank you

put your email i will send you pdf files.
haymeron@hotmail.com
 

mip

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@haymeron:
Why don't you upload the to the fileman?
 

Frosty

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haymeron

If its not too much trouble please upload to Fileman and post link also in 'general datasheets' forum

thx

JR
 

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Frosty

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Pads

ST Viper????

What about TopsSwitch from PI, better thermal, EMI character and lots of transformer ready made available from Premier Magnetics.

http://www.powerint.com Link also their for Premier as well.

Just suggestion

JR
 

thomaz

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@SIMBOX
48V * 18A = 864W !!!
I don't think a PC-Power-Supply can be modified to deliver this output power.

kind regards
thomaz
 

haymeron

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hi.

a flyback topology is not suitable for
high power over 300W.
the stress on the transistor and the output dioder is very high
especialy at low input voltage.

i suggest you to use mc34262 for the
pfc for the first stage with output
voltage at 400V.
for the second stage use a forward
current mode topology, use mc3842.

infineon (simenes) have one chip for
this work.
look also at http://onsemi.com

sorry, i dont have now the time to upload.
if you want to upload pdf files on switching
power supplies including pfc and other topologies.
i will post you my login and password at freedrive.

regards - haymeron
 

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haymeron

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in addition.

i think that a resonance converter in
the second stage will be more efficient.

haymeron
 

lll

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I think a PFC(using UC3818 controller) + Phase shift full bridge DC/DC converter(using UC3875) can do this job.
 

rauol

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Designing a 1000 watt AC_DC converter is a tricky affair
with an estimated efficiency of 75% the power desipated is in the range of 250 watts if the required qty is low you can try using multiple SMPS module in series or parallel combination :roll:
 

alonso_wen

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but as the power of the converter is increasing ,how can the heat be dissipated
 

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