We are using a Isolated Fixed-Ratio DC-DC Converter from Vicor (http://www.vicorpower.com/documents/datasheets/ds_BCM4414xG0F4440yzz.pdf) that is powered through a 600VDC accumulator.
The DCDC powers the entire low voltage system of a electric vehicle. It's somewhere between 10-16 Amps depending on the state of charge and which systems are active. The DCDC has problems starting up and I believe it is because we are on the limit of the output capacitance for the DCDC and unplugging some systems at start-up seems to fix the problem. Usually we have to start it without cooling fans being connected, and then connect them once it has finished starting up.
I am waiting for parts to connect to the DCDC through the PMBus to monitor the current and other parameters at start-up.
I was wondering if there exist a nice solution for slewing the output current of the DCDC?
By the way, this is a student project if it seems like a strange issue.