Hi,
I’d like to ask about the function of UCC28950.
My customer evaluates load transient on his DCDC converter board, but he found some abnormal function.
He confirmed that outC/D lock up for 1 cycle after load transient(500mA→50A) regardless of outA /B waveform is normal, and he said this causes bias magnetism of transformer.
-----------------------------
-CH1:outC
-CH2:outD
-CH3:current flowing through the primary winding of power transformer
-CH4:pulse transformer(primary side)
-----------------------------
Is it probable function that outC/D lock up regardless of outA/B waveform is normal?
I think outC/D is associated with outA/B, and outC/D doesn’t lock up independently.
Could you advise me please?
I’m sorry that I can’t get schematic of the board(it is my customer’s matter).
The condition of DCDC converter board is Vin=270-280V, Vout=28V/50A.
Regards,
Yaita