PROBLEM WITH PFC DIODE...... kEEPS BLOWING UP
I have made a pfc for the front end of my smps ........
It works great for 450W in 230V . But when ever i go down below 130V in the input the the pfc diode HFA08TB60 becomes very hot and tends to blow it self.
I thought due to high current the diode was blowing up but when I changed the diode to HFA25TB60 the pfc lost its power factor and the inductor Makes strange noise.....
Any idea why this is happening......
Does this have to do any thing with reverse recover issue of the bigger diode....
I am completely lost any help would be great ....
i am using UC3854 as my pfc controller and the basic Schematic from the datasheet.....
regards
sekhar
I have made a pfc for the front end of my smps ........
It works great for 450W in 230V . But when ever i go down below 130V in the input the the pfc diode HFA08TB60 becomes very hot and tends to blow it self.
I thought due to high current the diode was blowing up but when I changed the diode to HFA25TB60 the pfc lost its power factor and the inductor Makes strange noise.....
Any idea why this is happening......
Does this have to do any thing with reverse recover issue of the bigger diode....
I am completely lost any help would be great ....
i am using UC3854 as my pfc controller and the basic Schematic from the datasheet.....
regards
sekhar