TI E2E Community
Non-Isolated DC/DC Forum
TPS56221 failure mode
What's the failure mode for TPS56221? If the failure mode is Vin short to Vout, then the input voltage will go to output, it can destroy load. How to protect it?
If Vin short to Vout does happen, you are right that it can possibly destroy the load. But what is your concern in the circuit causing Vin short to Vout?
What I can think of is if the high-side FET experienced excessive thermal stress, it is possible to cause short from drain to source. It requires the power supply designer to set overcurrent protection threshold properly to avoid this happening.
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.