Hello Experts,
My customer is considering to use TPS7A4001. He would like to confirm whether the attached circuit will work correctly or not. Would you please review it?
Question_TPS7A4001_(09142020).xlsx
Best Regards,
Fujiwara
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.
Hello Experts,
My customer is considering to use TPS7A4001. He would like to confirm whether the attached circuit will work correctly or not. Would you please review it?
Question_TPS7A4001_(09142020).xlsx
Best Regards,
Fujiwara
Hi Fujiwara,
Please help me understand the problem a little better so I can be of better help.
Best regards,
Nick
Hi Fujiwara,
The customer is correct and the issue is with the linear regulator model. The older linear regulator spice models were not designed to be simulated in a floating application like this. The TPS7A40 can perform just fine as the customer has drawn in the schematic. The biggest concerns I have will be the sizing of R1, R14 and the zener diode. The customer should make sure that the resistors are sized appropriately to handle the load current of the TPS7A40 and the zener current of the zener diode. They should also make sure that the zener diode is sized appropriately to handle the power drop for the minimum load on the TPS7A40.
Thanks,
- Stephen