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.
Part Number: TPS51116
Hi, On TPS51116PWPR, When injecting lower frequency noise than switching frequency, is these lower noise passed to output side through TPS51116? Or due to switching operation, does not it appear at output voltage?
As a background, my customer is currently using this power supply IC on our board, and he would like to change the output Ceramic capacitor because of cost down. However, the frequency characteristics of the capacitor will be worse at low frequencies than before the change, so he is concerned about whether the product will be adversely affected. The final decision will be confirmed on the actual board, but he wants to confirm whether it is something you should be concerned about.
Thanks and best regards, M.HATTORI.
Changing output capacitor to ceramic itself will not inject low frequency. However, DCAP mode control does need high ESR ripple, which in normal case will need high ESR capacitor. There is a way to add the emulated ESR ripple to feedback. Please look at the below link for more details. You will need RCC circuit across inductor to generate the desired Vout ripple.
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.
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.