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400Vrms (560VDC) input 20W flyback converter available?

Posted by: r_x_p_u on

Hallo,

 

I need to implement a flyback converter ,input voltage 400VRMS (dc bus 560VDC) , power total :20W , it will have 6 seperate isolated outputs each 18V at 150mA. Is there any suitable powerint product with internal mosfet for this.If not, I plan to use 1000V or 1200V external mosfets. Does PI have any controller without internal mosfet?

 

Best regards.

 

FI 

Comments

Submitted by PI-Cochrane on 04/03/2014

For your application, I do not think PI 700V parts can handle (Maybe marginal ok) unless the derating requirement is not very hard.  So I suggest using stackfet to handle the high voltage anyway. You can use contoller from other company, but PI part maybe a good choice too.

 

Although PI part always has internally MOSFET,  you do not have to worry about the current sense and blew up by over current, because  PI part has internal current sense, and the cycle by cycle current sense make your design a lot more robust.

 

Regards