• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 64 subscribers
  • Views 1285 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS2836 Buck-Boost Functionality

Hayden_Hast
Intellectual 1515 points
Other Parts Discussed in Thread: TPS2836

Hello,

I'm looking at using the TPS2836 to charge a super cap and was wondering if it is possible to use the TPS2836 in the same configuration to regulate the discharge of the SuperCap.

Below are high level diagrams on the charge and discharge configurations.

Thanks for your help,

Hayden

  • 0
    TI__Expert 7905 points
    This post is not in the correct place, I will look to move to the correct forum ASAP
  • 0 in reply to JohnTucker
    TI__Intellectual 1515 points

    John,

    Thanks for the suggestion. The majority of the supercap designs and documentation suggest using a buck-boost to regulate the charge/discharge of the supercap.

    However, in this application the system can accept 4V-13.5V, therefore there is no need to closely regulate the discharge of the supercap and the addition of a buck-boost would just cost power. Have you seen any applications where the discharge of the supercap is unregulated or do you know of a configuration that this would be possible?

    The issue that I'm seeing with the original configuration is that during the discharge the VCC voltage of the TPS2836 is lower than the BOOTLO pin, therefore the HIGHDR signal won't be able to turn the high side FET on. Are you aware of a different Gate Driver that TI offers that can mitigate this issue or have another suggestion?

    Regards,

    Hayden