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TPS74801: About datasheet update

Tsukui Yusuke
Guru 21930 points
Part Number: TPS74801

Hi,

TPS74801 datasheet has been updated with PCN.
Let me ask about the changes in the specifications.

1.About addition of VIN NOM value
  Could you tell me why you added the NOM value of VIN?
  Customer think it is better not to list NOM value because it depends on VDO.

2.About addition of VEN NOM value
  Could you tell me why you added the NOM value of VEN?
  Threshold of the High and Low have been described elsewhere.

3.About addition of VBIAS NOM value
  Could you tell me why you added the NOM value of VBIAS?
  And Customers want to know the background describing ”1.6V”.
  Customer thinks that it is better not to define the NOM value.
  Because,The optimum value (NOM) varies greatly depending on the usage.

Thanks and best regards
Yusuke



  • 0
    TI__Mastermind 23361 points

    Hi Yusuke-san, 

    Will you help to confirm if those changes were made through "Changes from Revision J (January 2012) to Revision K Page"? 

    I would not worry about too much about having typical values added to the recommended table; a lot of our datasheet does not have a typical value in the datasheet. The important ones are the min and the max. The 1.6V is the maximum dropout for Vbias at 1.5A. 

    I agree that the optimum value (NOM) varies greatly depending on the usage.

    PCB was issued at the time because I see many other changes were added during the same time. 

    Does it make sense? 

    Regars, 
    Jason Song

  • 0 in reply to Jason Song
    Guru 21930 points

    Hi Jason,

    Thank you for you kind support.
    I understand the background and explanation.

    "I would not worry about too much about having typical values added to the recommended table; a lot of our datasheet does not have a typical value in the datasheet."
    "I agree that the optimum value (NOM) varies greatly depending on the usage."

    Are there plans to remove "NOM" from the datasheet?
    Customers prefer not to list specs that may not be consistent.

    Regards,
    Yusuke

  • 0 in reply to Tsukui Yusuke
    Guru 21930 points

    Hi jason,

    Is there any update about this issu?

    Regards,
    Yusuke

  • 0 in reply to Tsukui Yusuke
    TI__Mastermind 23361 points

    Hi Yusuke-san, 

    Thanks for providing the feedback directly from the customer. Will you try to communicate with your customers and let them know typical values are there to guide some customers to have some values to start designing their application? As long as your customers understand the typical values do not mean the optimal values, it should not be a problem for them. Especially a device with Vbias, we do get a lot of questions asking about the typical values on those applications and that could be the reason they decided to add the typicals at one point. 

    Does it make sense? 

    Regards, 
    Jason Song