Part Number: TPS22920
I have a customer who would like to know the min/max for tOff of the TPS22920. On page 5 of the datasheet, we only publish typical values for a few different cases. Do we have this data available?
Carolus Andrews, North East Field Applications
If this answered your question, please click below.
Getting Started with Current Sensing Video Training Series
TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs.
In reply to Nicholas Carley:
The app note above only goes in depth to explain t_fall, not t_off. By the diagram below:
It appears that t_off is a function of the device only, and should not be affected by the load (just a slew down, no RC drop out). My customer is looking to OR in at the node and drive from a separate source, so t_fall would not be relevant here. Do we have any data on t_off? If it helps, the customer is looking to drive Vin = 1.2V with logic at the gate of 2.5V.
In reply to Carolus Andrews:
According to the literature previously reference to in this thread, the t,off timing is defined as EN low to Vout falling to 90%, not 50%:
In reply to Antennahead:
You are correct the Application Note defines tOFF as the enable going low until Vout hits 90% (starts to fall). In section 1.2 of the app note, right below figure 1, a second figure is shown with tOFF going until Vout hits 50%. Different timing methods can be used depending on the part/manufacturer. It is best to verify how each part defines its timing parameters.
The TPS22920, as seen in Figure 41 of the datasheet, uses tOFF as the enable going low until Vout hits 50%.
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. 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 respect to these materials. 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.