This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
TPS63020 / phase margin
Part Number: TPS63020
I am troubled that the phase margin of TPS63020 can only be about 30 deg.
Please tell me how to improve the phase margin.Also, please tell me how much phase margin is required.
For more information on buck-boost devices have a look at www.ti.com/buckboost
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
Thank you for your reply.
I understood that there is no problem even if the phase margin is 30 degrees.
It is a question.1)Where should I connect the feedforward capacitor?2)What is the minimum value of phase margin? For example, is it okay at 20 degrees?
-----------------------------------------------The components of my test are:
The schematic configuration is the same as Figure 7 Application Circuit in the data sheet (Rev. G).
R1 = 100kohmR2 = 10kohm + 150ohmC1 = 10uF x 2C2 = 10uF x 3C3 = 0.1uFL1 = 1.5uH
Vin = 5.4VVout = 5.43Vload 1.6A
The phase margin was measured with the FRA5097, adding 75ohm between R1 and Vout.
In reply to user5236590:
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.