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TPS65988: TPS65990 VBUS RC design

Ann_Lien
Genius 12990 points
Part Number: TPS65988
Other Parts Discussed in Thread: TPS65990, , TVS2200

Hi expert,

Customer wants to know how to design VBUS RC snubber for TPS65990. Would you kindly help on it? Thanks!

Best regards,

Ann Lien

  • 0
    TI__Mastermind 29995 points
    Hello Ann,

    If you look within the TPS65988 datasheet, and go to section "9.2.1.2.4 VBUS Snubber Circuit", this outlines how to implement a snubber circuit on VBUS.
  • 0 in reply to Adam Mc Gaffin
    TI__Genius 12990 points
    Hi Adam,

    Thanks for reply! May I know why the combination is 3.48ohm and 4.7uF? Do we have equation for it? Thanks a lot!

    Best regards,
    Ann Lien
  • 0 in reply to Ann_Lien
    TI__Mastermind 29995 points

    Hello Ann,

    We ran a simulation to come up with the values shown in the datasheet. Why these values are chose is described within the datasheet, highlighted below. We recommend that if the customer wishes to use a snubber circuit, to use the values shown below. If not, than a TVS diode can be used such as the TVS2200.

    Hope this answers your question. If so, please click THIS RESOLVED MY ISSUE