• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 620 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.

TPS25200-Q1: Power rating of RDCHG discharge resistor

David Godefroy
Prodigy 30 points
Part Number: TPS25200-Q1
Other Parts Discussed in Thread: TPS25200, TPS2121, , TPS2553

Hello,

What is the power rating of TPS25200's RDCHG discharge resistor ?

Our application consists in using two TPS25200 and connecting their Output in order to do a logic OR. The input voltage is 5V for both.

When the first TPS25200 is disabled and the second enabled, 5V is applied on the output by the enabled TPS25200, therefore a continuous 10mA current will flow through the discharge resistor of the disabled TPS25200.

Can this current damage the TPS25200 ?

Thank you very much.

Regards.

David.

  • 0
    TI__Guru** 106151 points
    Hi David,

    Thanks for reaching on E2E!
    Any specific reason to consider TPS25200-Q1 for ORing application? We have power Mux devices TPS2121, TPS2594x, which would be ideal for these use cases. Please have a look and let me know if you have any queries.

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    TI__Expert 4750 points
    Hi Rakesh,

    I will let the customer answer to the use case and choice of our TPS25200; but in the meantime, do we have any data on the withstand discharge resistance capabilities? specifically for a 5.5V on Vout?

    Regards,
  • 0 in reply to TISL
    TI__Guru** 106151 points
    Hi David,

    The TPS25200 device is able to withstand power dissipation due to continuous discharge of RDCHG (5.5V*10mA=55mW). However, we are not sure on the long term reliability of the device. I suggest to go for dedicated power mux device.

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Prodigy 30 points
    Hi Rakesh,

    At first, we didn't have the need for ORing application. We just had to drive an output. But, our customer told us he would like to connect outputs, therefore in checking if it was possible we saw this RDCHG resistor.
    In TPS25200 datasheet, it refers to TPS2553 which is pin to pin compatible, and there isn't RDCHG resistor in TPS2553. could this component be compliant for our application ?

    Thank you.
    Best Regards.
    David.
  • 0 in reply to David Godefroy
    TI__Guru** 106151 points
    Hi David,

    TPS2553 can be used instead of TPS25200.
    TPS2553 does not have discharge resistor however it is rated only 1.5A. If it is ok, you can go ahead with TPS2553 .

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Prodigy 30 points
    Hi Rakesh,

    Thank you very much.
    Indeed, our application is for current less than 1A.

    Regards.
    David.