Part Number: LM5145EVM-HD-20A
I am trying to convert LM5145-EVM to a fly buck converter. I have replaced its inductor with a toroid. I measured the efficiency on the secondary side without loading the primary and its not good, is in the range of 60%-70%. Is it because my toroid has a single turn and is incurring a lot of core loss??
I have used diodes on the secondary side for rectification. I am thinking of driving Mosfet on the secondary side by using the low side gate drive pulse coming from LM5145 and isolating it from the primary by using a small transformer. Is it a good idea??
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In reply to Timothy Hegarty:
Thank you for the suggestion.
In general does using a toroid for single turn incurs lot of core loss or it works fine?
Thanks and Regards,
In reply to Nayana Soni:
A conventional inductor will likely provide better efficiency and more predictable performance. I doubt you will get enough inductance with a single turn implementation.
Thank you Tim!!
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