LM5034: Feedback loop

Mani Ravi

Part Number: LM5034

Hi,

This is mani. I am currently using LM5034 DC-DC controller for my design. I am facing problems in feedback loop. My system is not stable.

Do you have any solution or application notes for designing feedback loop for LM5034 pls do share.

THANKS!

over 7 years ago

0 Benjamin Lough over 7 years ago

TI__Mastermind 27115 points

Hi Mani,

Thanks for your interest in LM5034. This video provides some info for compensation in isolated topologies:training.ti.com/power-tips-compensating-isolated-power-supplies.

If you are able to share bode plot measurements of your design it would be helpful. I can also take a look at your schematic if you are willing to share it.

Best Regards,
Ben Lough

0 Mani Ravi over 7 years ago in reply to Benjamin Lough

Prodigy 20 points

Hai Ben,

Thanks for your support. Now feedback response is good.

I have another issue.while testing, transformer core is getting to 100 degree Celsius. i have to reduce temperature, i am suspecting that flux is high.

currently my converter is working at 400KHz, to reduce flux, can i increase switching frequency? what will happen if i increase switching frequency to 500KHz?

what should be considered and changes to be sone? any application note share it.

Regards,

Mani R

0 Benjamin Lough over 7 years ago in reply to Mani Ravi

TI__Mastermind 27115 points

Hi Mani,

Could you share your schematic and details of your transformer design? You can email them to me if you do not want to post them publicly: ben.lough@ti.com

Best Regards,
Ben Lough

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LM5034: Feedback loop