Other Parts Discussed in Thread: UCC25800EVM-1
Hi,
In the bias supply design guide it states that driving a transformer with 2 secondaries is possible, but stipulates that the regulation is not as good as .
My question is this: the EVM uses primary side resonance and the output regulation is acceptable without the additional regulator; if we used a 8 pin bobbin with 2 secondaries for an isolated gate drive bias, one providing 15V and other providing -4V, would the regulation be worse in this configuration than if we had just one +15V or +19V rail with a single secondary?"
Second question: The design guide it says there may be risk of noise between the windings. Is this referring to a situation where both secondaries are functionally isolated? I don't see that this would apply to the application for isolated gate drive bias where the supplies are referenced to same pt.
Best,
Jeejmas