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DC-DC Converter Design for EV

Hi, I´m working on DC-DC converter design for an EV.

We are using a TDK-Lambda PAF600F280-12/T module, but Its maximum input voltage range is lower than an our new HV battery

Our new DC-DC Converter must be capable for an Input Voltage range from 270V to 500V, and Output Voltage range from 12V to 14.4V

There are an application note related with a DC-DC Converter design with these features?

Could you help me to find a DC-DC architecture options please?