On 9/24/06, PicDude wrote: > Hi all, > > I need to know how to design high current boost DC-DC converters. For a > regular DC-DC converter, I would usually use National's webench tool or > similar to do the design for me, but how would I modify those to handle say > 50 amps? > > I expect it's not just a matter of putting on a higher-current switch and > passives rated for the higher currents, correct? > > Anyone have references/links to articles, books, tutorials, etc on this? > What is the requirement for the boost converter? For example, the input and output voltage, the efficiency requirement. Depending on the requirement, the design will be totally different. 50A is not small current. 50A @3V will be 150W. 50A@24V will be 1.2kW and the design approach will be very different. The design which fits 1A@3V will not fit for the design of 50A@3V since the loss on the diode will be too much and you may have to use a synchronous boost design. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist