Other Parts Discussed in Thread: UCD3138
Hello,
I imitated the PSFB development board of UCD3138 and made a power supply,
and found that when the loop bandwidth is 6kHz, Vo will oscillate obviously when the load jumps from 0A to 9A. As shown below:
When the loop bandwidth is 22kHz, the oscillation of Vo is suppressed, as shown in the figure below:
I know that increasing the loop bandwidth can optimize the dynamic response characteristics of the power supply,
but what I am puzzled is that the loop of the development board is only 2kHz, and there is no oscillation when the load jumps, while the 6kHz bandwidth power supply prototype I made will oscillate. .
I wonder if there are other factors related to the dynamic response of the power supply?
