based on RDR-257, I'm designing a Bulk topology 40W power supply. The pixls file is attached.
I would kindly request you to review it. Your thoughts are welcome.
1- For the inductor L3 (as in schematic at page 8), I'm considering to use 2 inductors in parallel to meet 500uH and Irms;Ip rated currents with KP=0.73, instead of building a transformer with RM8 core as in the design sheet :
( 1.0mH; IR=0.56; ISAT=1.1A; DCR=1.37Ohms,CODE 7445830, WURTH WE-PD4 TYPE X)
(1.0mH; IR=0.75 ;ISAT=1.0A; DCR=0.82OHMS; COILCRAFT MSS1210-105KE)
datasheet : http://www.coilcraft.com/mss1210.cfm
Is this approach a good option ? I'm willing to use inductor ready from manufacturers as those stated above.
2- How can I simulate the harmonics for this design using PI's spreadsheets ? is it possible ?
Thanks for your attention.