Hey Suganya,
To analyze the closed loop response of the circuit with respect to Vref, I added a voltage input above the DC source and ran the AC transfer characteristic. E2E_DAC8822_Acl.TSC
From the resulting bode plot, the closed loop system appears to…
Thank you for your quick response, will increase the loads and update you
We don't have frequency response analyzer to check BODE PLOT and PHASE MARGIN, please advise is there any alternate method?
I recently purchased a frequency response analyzer and am looking to validate that it measures gain and phase margin properly. Can someone recommend a TI dev board for a dc/dc converter that has:
1) gain/phase margin data (a bode plot) in the datasheet…
Hi Jass,
We have a Power Stage Designer tool that comes with a compensation calculator. https://www.ti.com/tool/POWERSTAGE-DESIGNER
This calculator works for LM3488 as well. If you have a Bode Analyzer available, measuring the stability on bench will give…
Part Number: LM51231-Q1 Hi team,
My customer have question about bode plot for phase margin.
They inject 50~100Ohm in following red block and measure by network analyzer.
Does this measurement work well?
Regards,
Youhei MIYAOKA
Hi Bhuvaneshwari,
Most of these can be measured with a simple circuit design such as what is used in the TLV73312PDQN-643 EVM. For PSRR we use a Bode 100 with a line injector, and for noise we use a spectrum analyzer + noise box. You will also need a…
Part Number: TIDA-01471
Hi' Another question I have is this. When I examined the Filter bode plot in the reference design, it was written that it guarantees 0.7Hz. When I analyzed the Bode plot graph with an opamp these capacitor and resistor values…
Hi Ron,
Thanks for your suggestion. I realized I had an error in my sim (In+ connected to wrong side of the JFET), once I corrected this I was able to get an output even with the 1.2M pulldown.
I also added in D1/D2 clamping diodes which I do have in…
Stephen,
Thank you very much for your feedback. It clarifies my question.
I'd like to mention one thing. I'm not sure how Josh tested the stability of the TPS79901. But, if only an oscilloscope was used, I'd suggest that Bode plot analysis by frequency…
Hello Yx,
Like SPICE models, you will need an average model to determine Frequency response. A bode plot cannot be generated from a transient model.
Suggest using a load step and analyzing the perturbation and damped response to the output set point…