UCC2813-5-Q1: FLYBACK CONVERTER

Thanks a lot.  It got clarified

Thanks for the above clarification.

Another clarification required.  you said NS1 is secondary and NS2 is auxillary.  But the winding resistance information provided in the solution is as following, which quite contradicting. 

Primary resistance RP = 870 mill ohms

NS1 RESISTANCE RS1= 8.6milli ohms

NS2 Reistance RS2 = 700 micro ohms

in the above windings primary current (nominal)   = 2.5 A(approximated), its resistance is 870 milli ohms

                                    secondary current              =4.5a                             its resistance is 8.6 milli ohms

    where as auxillary current is assumed to be a maximm of 250 ma, its winding resistance is 700 micro ohms

       this above information is not justifiable. normally large current winding shall have very  low resistance, so that copper losses will be minimized. the information provided in the solution is contradicting the transformer basics.

Please look in to the matter and clarify.

Hi Madhusudan,

We will look into above query and get back to you. Meanwhile, could you please share the WEBENCH design details, Please use below steps for sharing the details

Step1: Create WEBENCH design for your input condition and click on share design option as shown below

Step2: Share the design link  as shown below

Regards

Shaheen