Good day to all. I've been asked to design a DC-DC converter and=20 this one is outside my current=20 experience. Ideally, I'd like to farm this=20 project off to someone else. Barring that,=20 design assistance would be greatly appreciated. Here are the specs that I've been given: Input voltage range =96 180 Vdc to 220 Vdc Output voltage range =96 from 2000 to 2400VDC=20 (regulated by varying input voltage from 180 to 220VDC). Power rating of the converter should be suitable=20 to charge high voltage capacitor bank with total=20 capacitance of 250uF in less than 10 seconds. Capacitor bank have to be fully charged after not more than 15 seconds. Temperature rating is from -20 to +125 Deg C. Dimensions of the converter module: have to be=20 made in form of a cylinder with maximum diameter=20 of 48.5mm and length not more than 670mm. Protection: input over-voltage protection; output=20 protection from capacitor bank discharge transient voltage/current. I don't have ANY idea how to either design or=20 specify the transformer (or inductor) so that it=20 won't have voltage-breakdown issues. Anyone want to take this on? Please contact me=20 privately and we can discuss compensation. Many thanks! dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA 780-489-3199 voice 780-487-6397 fax 888-489-3199 Toll Free www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .