Input voltage of digital controllers for high voltage buck converter

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Joined May 22, 2019
I am using a buck-converter as a pre-regulator stage to a fixed frequency half-bridge resonant converter. I am planning on using peak current mode control of the buck converter, alongside voltage mode control of the final output voltage on the secondary side of the transformer.

My question however relates to the buck converter and which devices I can use to achieve the peak current mode control. I have came across the TMS320F28027 "Piccolo" controller from TI, but the data sheet states it has an input voltage of 3.3V maximum, and is low power.

My input voltage to the buck is 270V nominal, which varies slightly. Would I be able to use this device to control the buck converter? If so, how would I power it? Using a divider network, or?