LM5030 - regulation

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podlipny
on 08/03 at 04:26 AM

Category(s):	power.national.com
Subject:	LM5030 - regulation
Message:
I use LM5030MM in standard push-pull isolated topology with PC817 optocoupler + TL431.I have problem with regulation.When the duty cycle should be less then 50% (100% is full opened), one output OUT1 is with no pulses, only small spikes are there. Second OUT2 works well with small duty cycle. I see problem with one polarity transformer core saturation. Is there any experience how to solve this? How to do, that both outputs will work fully in small duty cycle?

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