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TPS22965: TPS22965NQWDSGRQ1

Part Number: TPS22965
We are using TPS22965NQWDSGRQ1 load switch in our design.
In the datasheet the slew rate formula is given with the unit of uS/V .

load switch-1.JPG
But i need to get the slew rate value in V/uS. But, as I understood it will not be meaningful if we simply inverse the formula.
Hence I have simply inverted the individual elements and added together as below to get the result in V/uS :
load switch-2.JPG
Kindly confirm me that the above mentioned formula is correct else give me the slew rate formula in terms of V/uS.
  • Hi Devendhiran, 

    Thanks for reaching out on E2E!

    Unfortunately, I can't see the images you attached. However, I can get the idea of what you're saying. You can use the Slew Rate equation on 9.3.1 to calculate the slew rate in us/V, and then take the inverse of result. This will give you the answer in V/uS, which you can use to approximate the rise time similar to Table 1. 

    Thanks,

    Thanks,

    Arthur Huang


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

    Please click "This resolved my issue" button if this post answers your question.

  • Hi,

    Thanks your reply.

    If I take the inverse of slew rate (us/V) it will give 1/slew rate (V/us) - as I understood. Please correct me if my understanding is wrong.

    Also,  again i have attached the two images which i have added in the previous post.

    Datasheet formula reference :

    Modified formula reference : (Modified the individual elements to get the result in V/us)

     

      

  • Hi Devendhiran, 

    Your comment is correct, however the second equation you are providing is incorrect. Since the inverse of the slew rate is 1/slew rate, the 34 needs to be included in the denominator. 

    The easiest way to calculate the slew rate in V/us is to use the equation in the datasheet, and simply take the inverse of the result (1/answer).

    Thanks,

    Arthur Huang


    To find the latest information on Power Switches, visit www.ti.com/powerswitch

    Please click "This resolved my issue" button if this post answers your question.