Hi Yong,
If you are trying to add bode in Simplis, you will need:
a. Settings as:
b. Pop trigger, either of the below can work:
Typically connected at SW node
c. Bode probe with AC source:
Typically connected same as EVM bode -> CHA and CHB
You can…
Hi Ben,
Thankyou for your previous response.
How can we use Webench power designer for drafting the IBB configuration using LMR43620-Q1 .
Could you also provide calculator tools or spreadsheets for determining component values and analyzing the Bode plot…
Thanks for your reply, Ive tried several things in these days. I lowered the capacitance and 100uF seems to be the right spot i dont have instability anymore above 3.5V and it works fine at 26V (middle range) the problem at 50V its still present.
Here…
Hi Stefan, sure it has an impact, but in the excel quickstart calculator the field for Cout2 is locked and I can not enter the value. The file itself is password protected so there is nothing I can do... The webbench designer does not incorporate the average…
Hi Ailing,
I think maybe the test probe A/B of Bode Analyzer is reversed. Because usually the Gain curve should decrease as frequency increases, but in your results, the Gain curve is increases.
About the resistor, the output current of Bode Analyzer…
Hi,
Apologies, I am unsure of what is being asked.
We measure our stability plots by injecting a small signal with a bode analyzer into a break in the FB path and analyzing the resulting loop response. With this device's associated EVM, you can find this…
Hello Zhang,
Thanks for using the e2e forum. To calculate the loop stability, you can use our quickstart calculation tool: https://www.ti.com/tool/download/SNVC224
If you want to measure a bode plot on a physical device, you would need additional equipment…
Hi Anthony,
We have some measurements, but they are in bode3 document file types. Do you have Bode Analyzer Suite? It is free to download here: Bode Analyzer Suite - control your Bode 100 | OMICRON Lab (omicron-lab.com) The SIMPLIS models are programmed…
Hi Conor,
You will need to have a vector network analyzer (VNA) to measure the impedance of the chokes over frequency. Here is an example of a VNA:
https://us-shop.omicron-lab.com/products/bode-100
When using the VNA, you want to obtain the magnitude…
Hello,
This is peak current mode control the double pole should occur at fs/2.
The compensation of the data sheet was taken from application note slua560 that you can find in the following link. It goes through the step by step design process of phase…
