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TPS22950-Q1: The understanding on Vout-Vin=0.3 in output current limit section.

Ted Xu
Expert 4635 points
Part Number: TPS22950-Q1
Other Parts Discussed in Thread: TPS22950

Tool/software:

HI BU team 

How do customer understand the test condition on Vout-Vin=0.3V in datasheet output current limit section?  Now customer is evaluating tps22950-Q1 urgently and expect to get the replies ASAP?

And how do customer understand the VRCB?

If vout-vin=0.3V, tps22950 should be in RVB status. 

Thanks 

  • 0
    TI__Expert 4635 points

    Hi team

    What's the updates?

    Thanks 

  • 0 in reply to Ted Xu
    TI__Mastermind 39315 points

    Hi Ted,

    It looks like there is some issue in the datasheet. I can see that this is correctly mentioned in non-Q1 variant datasheet.

    We will correct this in next revision of this datasheet.

    Best regards,
    Arush

  • 0 in reply to Arush Gupta
    TI__Expert 4635 points

    Hi Arush

    Thanks for your comments. but I still don't understand how to meet the test condition Vin-vout=0.5V under RILIM=1.15kohm. 

    Assume Vin=1.8V the RDSON=116mohm, the Vin-vout=1A*116mohm=0.116V. 

    Thanks 

  • 0 in reply to Ted Xu
    TI__Mastermind 39315 points

    Hi Ted,

    This is referring to how the testing happens in our test site.

    Vin is kept at different voltage levels like 1.6V. 1.8V, 3.3V, 5.5V and Vout is kept at Vin - 0.3V or Vin - 0.5V. Then the current passing through the device is checked for different RILIM value. The device will limit the current and that value is captured here.

    Here during the test, Vin source or Vout source may change the value according to the Ohms law. That is expected. That is more towards the actual test hardware, but I think I was able to give you some insight on the test conditions.

    Best regards,
    Arush