Part Number: UCC28881
Other Parts Discussed in Thread: PMP11302
Tool/software:
hi,
i had designed a circuit using UCC28881DR.
The design was made in such a way that the output regulates to 14v. i had made the same by modifying the PMP11302 design.
initially output was stable when an initial load was applied to the buck converter design. The load was a 10v Zener with Zener resistors such that it comes 24mA.
But later when i tried to load the circuit (TRIED TO DRIVE TWO MORE RELAYS) further the output is now regulating to a higher voltage of 16V in place of 14V.
The interesting fact is that if i further increase the load on the 14V rail the output is coming down to 13V.
please share possible solution for this issues. What would have gone possibly wrong which is causing my output to fluctuate rather than being constant.
The project is in critical juncture and need urgent support.
Amal
