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Tool/software:
I'm trying to find a, preferably PSR, flyback converter that can handle
input from 15Vdc to 150Vdc
2 individually isolated outputs
and has a very low no-load consumption. I started looking at the UCC28730 which at first glance looks perfect but can not handle the low input voltage. Then I looked at the UCC28720 but from the forum I can understand that this is not suitable for multiple output flyback.
Does anyone have a suggestion to what is best to use?
Hi,
They can be used for two individual isolated outputs. But not in your case, since both ICs cannot start at 15V.
You can consider using UCC28C53.
Problem is achieving low enough no-load consumption (< 20mW) with the UCC28C53, or have I gotten that wrong?
The datasheet states that the Ivdd = 1,3 -2mA and does not say anything about no-load or wait state current.
But for the UCC28720 it looks better. On the UCC28720 webpage there is a link to a document "Designing multiple output converters with primary side sensing" which kind of suggests that this can be used for multiple output fly-back.
I will talk to customer and challenge them about the minimum input voltage to see if he will raise it to 23V.