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DC DC converter

Other Parts Discussed in Thread: UCC28C43, UCC2897A
  • Are there DC-DC Converters with Forward topology in the Power range of 250W. The converters with forward topology were very much minimal with the power and voltage rating that we were choosing for. Can you give us a bit more insight on the part numbers and their respective efficiency.
  • Can you give a bit more information about the HI-Rel DC-DC Converter products that TI offers for the same power range. The following image is from the website beyond which the hyperlinks did not work.
  • We did not find modules for the converter topologies which are isolated(Flyback/Forward) for the power ratings mentioned. Are there any modules which will encompass all the passive components and the transformers within it?
  • Hi,

    The examples are UCC2897A and UCC28C43. Efficiency with UCC2897A can be over 90% depending on your output voltage. UCC2897A is for active clamp technique to help boost efficiency. UCC28C43 needs RCD clamping and reset and efficiency is lower.

    I do not know what HI-Rel DC-DC is. So no clue.

    You may need to ask your local TI sales to request a reference design.

  • Hi,

    I would say 250W is high power for a forward converter. If the input voltage is low then maybe a push-pull converter (VDS=2xVIN) but if the input voltage is higher then maybe a traditional half-bridge (VDS=VIN). Both the half-bridge and push-pull are double ended power topologies compared to flyback/forward which are single ended topologies. 250W is more easily achievable with a double-ended converter topology. For High rel, do you mean enhanced performance, military grade controllers? If so, here is the parametric filtered list of TI, High rel, enhanced performance, space and military grade push-pull controllers. To search the complete list of TI reference designs, check out this link.

    Regards,

    Steve M