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.
I just board one of these eval boards. Connected 3.3V to the input (J1, correct polarity) and my power supply goes into current limit mode. So I checked everything. All looks OK. I tried measuring the resistance from + to - and it's about 1ohm. In fact, all 4 screw terminals measure about 1 ohm between the terminals. Very odd.
I even tried removing one of the terminals, put probing the pads also shows about 1ohm to GND. Has anyone else found this? They're supposed to be tested but I can't think of anything I can possibly be doing wrong. It's not a complicated board!
A bit more investigation: with the current limit set a bit higher on the power supply, the TPS22976 got very hot. So it must be assembled wrong. Which means it must not have been tested... Grrrr....
Hi Jon,
That definitely doesn't seem like normal behavior for our EVMs. We haven't had anyone else with this issue, and the boards we have on hand don't exhibit this behavior. Each EVM goes through testing after assembly, so it seems odd that this board has problems.
To continue support for this issue, please reach out to me directly at a-kaknevicius@ti.com.
Thanks,
Alek Kaknevicius
Hi Jon,
Sounds good, let me know if the new EVM performs better.
Thanks,
Alek Kaknevicius
Yes the replacement board performs as expected. Weird. Thanks for your responsiveness Alek.