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.
Part Number: TPS40422
I have a TPS40422+CSD87350 two phase design, the target loading is 60A. Attached is the schematic.
when power up with 40A loading, the board works fine, but failed to work with 60A loading.
I tried a lot check with component, soldering issue, but no improve. then I found after I heat the board to a level like above 40 degree Celsius. the board works.
So, what is the root cause for the board fail? and why the pre-heat can make it work? is there any issue with my schematic design?Power Sch.pdf
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Qian Chen:
I found the TI Fusion SW tool, How can I connect the board to this tool? Is there any debugger to use?
In reply to user3204916:
The USB I/O adapter is available at TI store.
Yeah, I got the adaptor, and there is OC fault.
But actually, we have mass production last month, and there is no issue with the default setting (we already have 1000 pcs board shipped with default setting). I checked the component, found that the failed board installed TPS40422 with data 2016 Oct. and the good board is new chip in 2018.
So seems that the part is too old, right? now we have 500 failed board, and I want to repair the board with minimum effort, do you have any suggetion?
"For temporary solution, you can add a resistor in parallel with C563 and C565 to attenuate current sense signal, hence to solve OC problem." What is resistor value to aprallel with C563?
Can you let me know the inductance and DCR value? What's the OC threshold you expect?
If changing R623 and R624 value is not enough, are you able to program the controller on those 500 failed boards?
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.