possible to achieve 1kw with uc3842?

Riff · 21st July 2012, 05:34 PM

possible to achieve 1kw with uc3842 on this scheme?
Skema n PCB gacun2 copy.jpg
help me...

sawreyrw · 21st July 2012, 07:36 PM

Yes, but you will need a gate driver between the 3842 and the power switches.

powerbob · 21st July 2012, 11:20 PM

The UC3842 has lots of drive. But your topology looks like a flyback to me. It would have simple on and off operation for the transformer. This means only half of the flux swing of other topologies.

Typically flyback’s are used for cheap and dirty supplies of 100 watts and less.

Riff · 22nd July 2012, 03:33 AM

Quote:

Originally Posted by sawreyrw

Yes, but you will need a gate driver between the 3842 and the power switches.

whether you are referring to this scheme can be made 2 output drive?
if yes,can you guide me to build GDT for this?

21st July 2012, 05:34 PM	#1
Riff diyAudio Member Join Date: Dec 2011	possible to achieve 1kw with uc3842? possible to achieve 1kw with uc3842 on this scheme? Skema n PCB gacun2 copy.jpg help me...

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21st July 2012, 07:36 PM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	Yes, but you will need a gate driver between the 3842 and the power switches.

21st July 2012, 11:20 PM	#3
powerbob diyAudio Member Join Date: Aug 2010	The UC3842 has lots of drive. But your topology looks like a flyback to me. It would have simple on and off operation for the transformer. This means only half of the flux swing of other topologies. Typically flyback’s are used for cheap and dirty supplies of 100 watts and less.