Hi, I'm designing battery charger 6.8Vdc/0.8A in LinkSwitch-II family by using PI Xls designer 7.0. I seem found some bugs in this program that I would like to reduce the maximum or peak flux density by secondary turn adjustment. The secondary turn is adjusted by changing the output diode conduction time (DCON). I try to change DCON so the secondary turn will be changed but the maximum flux density still not change in any time when I have changed the DCON. I thought may be missed the calculation in this. Any suggestions, please kindly let me know and when this PI Xls will be supported us the transformer design for LinkSwitch-II. Thank you and Best Regards, Terayouth W.