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: TPS7A85A
My customer has question.
Looking at Figure 72 of the TPS7A85A data sheet, the output voltage does not rise to 100% when CNR = 10 nf ~.(Approximately about 90%)It takes a very long time from 90% to 100%.Please tell me the reason for this behavior.
Hi T, according to figure 47 of datasheet charging of CNR/SS is a two phase process: First CNR/SS is charged by INR/SS. Later CNR/SS is charged by RNR, which drives a much smaller current into CNR/SS. Kai
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.
In reply to kai klaas69:
Thank you for reply.
I understand there are two phases.However, there is no provision for the timing at which the phase process.Is not it to detect that the output voltage has risen to 100%?Or will you switch around 90%?
The RNR is described as 250 kΩ, and it can be assumed that the current is about 3.2 uA at Vref = 0.8 V. Since INR / SS = 6.2 uA, I think that it is not a very small current even if phase switching, but why is the rise so late?
In reply to T Kishi:
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.