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Ic uc3846 problem designing peripheral components

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mukeshp11

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Dear All
I am working on one project fo DC buck converter with input as 600 to 300Volts and ouput as 110V within that range.
My max duty cyclw will be 0.45.
Also i am using Half bridge topology for this.
I am having problem while designing the peripheral circuitary for output voltage feed back part.
Now as shown in the attachement pin no. 5 is voltage reference which will be 5V as per my IC and 6 no. pin is voltage feedback from my output which also i am using through optocoupler as feedback.
Now also there is pin no. 7 called COMP and components zs and zf which i find difficult to design
Or can somebody give reference for any converter design using IC 3846.

Thanks & Regards
Mukeshh
 

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