Hello,
To measure the loop response of TPS25850-Q1, is it OK simply to do a general measurent as the same as conventional DCDC convertor with RINJ added as shown in the below diagram?
RINJ is as shown in the below figure from:https: //www.ti.com/seclit/ml/slup386/slup386.pdf
Thanks!
Regards,
Oguri (TIJ automotive FAE)
Hi Oguri,
If you want to do the loop measurement for TPS25850-Q1, you can refer to below picture:
1. You need to cut the SENSE and BIAS, and then support BIAS using external 5V.
2. Add a 20ohm resistance in series with SENSE, and remove all of the OUT,VBUS SENSE capacitors, and just keep the BUCK output capacitor.
3.At last, you can use the equipment to add noise at both sides of the 20ohm resistance.
BTW, if you want to need our test result, please wait a moment, because of the COVID-19 pandemic, we have to home office today, so when we come back to the office, we will send our test result to you, thanks.
Thanks,
Kuno.
