• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 131 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UC1708-SP: Switching Speed and Current

Connor Connaughton
Expert 4470 points
Part Number: UC1708-SP

Hi Team,

Hope you are well!

I am planning to use the UC1708-SP to drive a couple of power MOSFETs at 500 kHz in a converter design. The datasheet only has current supply current draw data for a 2200 pF load switching at 200 kHz.

  • Are there any concerns with switching this part at 500 kHz?
  • Is there any data on total supply current when switching at higher frequencies?
  • Can both channels be operated independently such that we could have each channel driving a FET in two separate converters? (i.e. there won’t be any relationship between the switching duty cycle of each channel)
  • Is there any SEE data on this part? I do like that it is bipolar, but I still wonder if it has been tested in heavy-ion eve

Thanks!

Connor

  • 0
    TI__Mastermind 26835 points

    Hey Connor,

    • Are there any concerns with switching this part at 500 kHz? The delays and rise time specifications aren't amazing given the age of the device, so those are something to consider. They could end up cutting into your duty cycle and efficiency a lot.
    • Is there any data on total supply current when switching at higher frequencies? No
    • Can both channels be operated independently such that we could have each channel driving a FET in two separate converters? (i.e. there won’t be any relationship between the switching duty cycle of each channel). Its fine for the device, but I imagine there are concerns around layout given you might be driving things in two very different spots.
    • Is there any SEE data on this part? I do like that it is bipolar, but I still wonder if it has been tested in heavy-ion eve No

    Thanks,
    Daniel