• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 168 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.

TPSM82822: RθJA value difference in datasheet and webench design

Haritha Munnangi
Intellectual 280 points
Part Number: TPSM82822

Tool/software:

Hi Team

As per below images we have found that RθJA value in datasheet is showing 92.6°C/W but in WEBENCH is showing 63.9°C/W, which one we need to consider and why it was different??

Thanks in advance,

Regards

Haritha

  • +1
    TI__Mastermind 22160 points

    Hello Haritha,

    thanks for reaching out in E2E.

    The highlighted RθJA value in datasheet is determined according to JEDEC 51-7 and is intended as a standard method to compare the performance of different packages or devices as described in this Application Note: "Semiconductor and IC Package Thermal Metrics".

    The value in WEBENCH® is estimated when the device is assembled to the suggested PCB layout.

    In the datasheet you can also find the RθJA value of 64.3 °C/W when the EVM is used.

    I would suggest to consider the RθJA value which comes closest to your design and layout. For example if you plan to follow the layout recommendation of the EVM then you could consider the corresponding RθJA value.

    Best regards,

    Andreas.