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: TPS3890
TPS3890 Explain TPD(f)
Datasheet (SLVSD65A) page11 describes the description of "SENSE(rising) to /RESET propagation delay" (TPD(r)).This makes it possible to understand the time adjustment that /RESET deasserts.
However, there is no description of "SENSE(falling) to /RESET propagation delay" (TPD(f)) in the datasheet.The mechanism (method) by which /RESET is asserted by this is unknown.
Is it possible to provide materials that explain TPD(f)?
※There is no CT in the application note (SBVA047) There is a description of /RESET assert. There is no explanation of /RESET assert with CT.
Please see the timing diagram as I have attached below. tPD(f) is similar to tPD(r) but instead when the SENSE enters a UV condition and asserts a falling edge.
If you think this response answered your questions/concerns, please click the button to let us know!
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 Abhinav.Sharma:
Hi, Abhinav san
Thank you for your prompt reply.Please check the answers.
The question is the operation of tPD(f) when connecting a capacitor to adjust Delay to CT terminal.
Looking at the timing diagram in Figure1, tPD(r) and tPD(f) are delayed at the same time.
Calculate the delay value of tPD(r) by Equation1 page11 of the datasheet,Is this calculated Delay value valid for tPD(f)?
tPD(r) = tPD(f)
For example, if tPD(r) is 100usec in Equation1, will tPD(f) also be 100usec?
※ I understand that when the CT terminal is set to Open, the delay time is different between rising and falling with tPD(r)=18us(typ) and tPD(f)=25usec.
In reply to cafain:
My first instinct is that Equation 1 on page 11 similarly applies to tPD(f), the only difference being a change in tPD(r)(nom) to tPD(f)(nom). This would change the value slightly but would still reflect the value from equation 1. This being said, I need to look into this to be 100% sure. I will do some calculations and see if we have any tests that match up.
Apologies for the delay, but please follow my recommendation above.
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.