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Buck ic for 320Vout application

Question asked by on Jun 24, 2018
Latest reply on Jun 25, 2018 by dkb


Im searching a controller for high voltage buck.

500V:400V input -> 320V output. 300Khz-400Khz freq. 2KW.

i need also output current regulation as current limit...

I thought about LT3840 (with external drivers off course) but i know that i will have some problems with output current measure and current regulation due to the extream voltage.

1.  There any other option connecting the current measurement resistor except in series with inductor? mabe somehow with current transformer? 

2. Is there any other IC that fit for this app? i thought about lt3741 because of the Average Current Mode but this ic demand 2V at VIN above the output voltage - again, its not possible.