• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 238 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.

Original question:

TPS92623-Q1: thermal sharing

TPS92623-Q1: Thermal sharing mechanism

Dat Nguyen
Prodigy 10 points
Part Number: TPS92623-Q1

Tool/software:

Hi guys,

I have a question regarding the working mechanism of this thermal sharing feature of TPS92623.

I understood that the current will be shared between two pins RESx and OUTx depending on the supply voltage level in order to reduce the thermal accumulation in TPS92523.

What I am curious about is the mechanism behind this. How does the IC know when to increase the current on RESx path and reduce current on OUTx, and vice versa? Is there any kind of current monitor happening in order to detect when to switch between the two pins?

Thanks,

Dat

  • 0
    TI__Genius 10120 points

    Hi Dat,

    As you can see, the output current distribution between the RES path and the OUT path will change according to the Vin and Vout, but the total output current can be constant.

    The RES resistor is used to set the current of the RES path, When the Vin rises, the current of the RES-path increases, and the current of the OUT-path decreases, then more power will be shared by the RES resistors.

    Many thanks!

    BR,

    Hailee.

  • 0 in reply to Hailee Xu
    Prodigy 10 points

    Hi Hailee,

    Thanks for your answer. I totally understood the functional of TPS92523, what I am interested in is the working mechanism behind that.

    Is it okay to think that the current is distributed by comparing the current with an operational amplifier or something inside and turning the transistor on/off?

    Regards,

    Dat

  • 0 in reply to Dat Nguyen
    TI__Genius 10120 points

    Hi Dat, 

    I think it's similar to the latter.

    BR,

    Hailee.