Low voltage PFC with LT1249

Question

Hi, 
 
 I have to design a low voltage PFC for my project. 
 Uac = 24Vrms, Uout = 40Vdc, Pout = 150W, 
 The MOSFET, the diode the inductor and the capacitor are determined and selected. 
 (L = 100uH, Cout = 2420uF) 
 
 Could someone help me how to determine the passive components for LT1249? 
 I have been trying to simulate with modified passive components, but the input current does not look sinusoid and the output voltage fluctuates. 
 
 Thanks in advance for the help

ADIApproved · Accepted Answer

Hi Attis, 
 The best approach is to scale the demo circuit values. I attached a file that might help. 
 PDF)

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Low voltage PFC with LT1249