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: TIDA-00951
There is no output of pin 35 EPWM5A of TMS320F28035 in TIDA-01281 control board
In the source code, EPWM5A is set by Coldstart state but it is not used.
Q1.Is it possible to BUCK Mode operate without any wave from EPWM5A?
Q2. In what operation is the EPWM5A function activated?
The isolated bidirectional DC-DC converter has two major modes of operation. When it is working as a backup power supply, it operates as an active clamped current-fed boost converter transferring power from the battery to the 380-V DC bus. When operating as a battery charger, the DC-DC converter worksas a buck converter transferring power from the 380-V DC bus to the battery. Apart from the two major modes, there is an additional mode for the cold starting the system. This mode is used to start up the TIDA-00951 in case the HV DC bus is completely discharged before board start-up.
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 Watermelon Noodles:
As shown in the figure, for driving Q8 and Q9 of the 380V bus side switch, the driving pulse of pin 35 EPWM5A of TMS320F28035 isMust beHowever, the function is disabled in the actual firmware.
Why is the EPWM5A signal on the TMS320F28035 disabled?
In reply to sambong oum:
In the Buck mode, this design works as half bridge converter, Q8 and Q9 is not must have.
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.