• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 32 subscribers
  • Views 117 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TLK10232: Package Theta-JA and Theta-JC and Heatsinks

Bill Bynum
Prodigy 40 points
Part Number: TLK10232

Hi, 

The 10232 datasheet states the OP temperature as -40°C to +85°C free air operating and maximum junction temperature of +105°C. What are the Theta-JC and Theta-JA for the package? Also, will heatsinking the package enable operation above +85°C?

Thanks, --Bill

  • 0
    TI__Genius 17055 points

    Hi Bill,

    Theta-JA and Psi-JT (thermal characterization, junction to top of case) are provided in Table 10-1 in the datasheet.

    This excerpt from the app note Semiconductor and IC Package Thermal Metrics explains the difference between Psi-JT and Theta-JC.

    It's safest to stay within the operating junction temperature and operating ambient temperature ranges. I can see a possibility of heatsinking enabling operation with ambient temperature >85C if junction temperature is still <105C, but I cannot guarantee this will be safe for device operation and reliability since validation testing was only performed over the specified operating temperature ranges.

    Best,

    Lucas

  • +1 in reply to Lucas Wolter
    Prodigy 40 points

    Hi Lucas,

    Ugh... I totally missed table 10 in the datasheet, thank you for pointing that out.

    Yes, that does answer my question, thank you.

    --Bill