Other Parts Discussed in Thread: TL431 , UCC28911 , LM25037 Hello,
I am trying to find measure the Bode Plot of a 12W Flyback converter made from Viper27 IC. It has an integrated MOSFET and controller.
I want to know the phase margin at the crossover…
Hi Allen,
Have you already performed any bode test using bode analyzer ??
I see that C2313,C543 & C532 should be hardly less than 100pF and it cannot be in the order of nF...
Regards,
Haseen.
Hi Takashi-san,
PFA simplis model for doing bode simulation using AC analysis. Also attaching app note measuring bode plot with the real hardware.
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/TPS564257_5F00_Full_5F00_Encrypted_5F00_Average_5F00_Model…
Part Number: TPS564252 Other Parts Discussed in Thread: TPS564257 Dear Team,
My questions are related to the following E2E thread:
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1686938/tps564252-phase…
Part Number: OPA333-Q1 Other Parts Discussed in Thread: TINA-TI , INA333-Q1 Subject: Help Required: Phase Margin and Gain Margin Analysis of Op-Amp Current Source
Hello TI Team,
I am evaluating an op-amp-based voltage-to-current source for my system…
Part Number: LM5148 The Bode plot sweep range specified in the LM5148/5149 demo board datasheet is from 2 kHz to 100 kHz, while the sweep range set in TI’s DC-DC Quickstart calculator is 10 Hz to 1 MHz. What frequency sweep range should I adopt when measuring…
Hi Kaviselvan,
Omicron Lab Spectrum analyzer is what we used to run our boding measurement.
Your schematic has to look like the one below.
You need to include a feedback network on your feedback (FB) pin. If you are using our EVM , you will…
Hello Vincent,
thanks for reaching out in E2E.
The LM27761 stability has been verified for the recommended design parameters as explained in section 7.2.2 of the datasheet. A Bode plot verification should not be necessary for these operating conditions…
Hello Abbas,
Thanks for using the e2e forum. The test method in the app note follow the general approach of measuring a bode plot with feedback loop error injection. The process is described in detail in this application note. https://www.ti.com/lit…
Hi Stefan,
Per discussion in the webex message:
So as mentioned: - Slope compensation is far of from the recommended 470pF vs 100pF - Compensation needs to be optimized: e.g. change Rc to 1.54k will give a phase margine of 68 Degree Still would recommend…
