Hi Reuben
When Vin<3.3V, the converter shut down due to the VIN UVLO set, when Vin>3.6V, the converter switches again.
"What happens between 3.3V and 6V"--- The device operates under dropout mode.
The 50 Ω is for bode plot measurement: …
Hi Manikanta,
We do not have a Bode 100 analyzer. I finally used an Audio Precision APx555 and Python scripts to make data acquisition, bandpass filters and signal analysis. The gain and phase measures make a lot more sense now.
Regards,
Jocelyn
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 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 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,
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…
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…
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…
