Trying to design PFC power supply using ADP1048, but LT8316 is not available. Please recommend a substitute for 500VIN step down

Question

I'm trying to design a PFC power supply to output 24VDC with a peak power output of 100W. The ADP1048 appears to be a good choice for my requirements, but the only DCDC converter that I can find which tolerates a VIN above 400V is the LT8316, which is unavailable for purchase. 
 
 Is there another DCDC step down converter than can take a 400V input and output 24V that is likely to be in stock anywhere?

ADIApproved · Accepted Answer

Hi gdecker77, 
 Have you looked at LT8315? LT8315 Datasheet and Product Info | Analog Devices 
 If it's also not available, you may look at LT3752-1 where the input voltage can go up to around 400V depending on the external components. However, it is optimized for a forward topology rather than a flyback. LT3752 LT3752-1 Datasheet and Product Info | Analog Devices)

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Trying to design PFC power supply using ADP1048, but LT8316 is not available. Please recommend a substitute for 500VIN step down