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Part Number: LM5023
I use LM5023 to develop a boost power supply, VCC auxiliary supply voltage is 24 V, power MOSFET voltage is 3 V. Request to raise 3V to 36V, there are problems in debugging, special help support, thank you!
The current problem is that the output voltage can only be adjusted to 13V can not be raised, transformer parameters for PQ2016, primary use 3TSs, auxiliary winding is 4TSs, output winding is 18TS.LP:2.8uH.
This is a two-way DC/DC converter.24VTO5V5A_1030.pdf
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In reply to Atul Kulkarni9:
Thank you, Atul Kulkarni23!
Today I have a new development in debugging, the converter can rise to 17 V, and will run in blocking mode. But not with load.
I did this by debugging the Optocoupler resistor in charge of the resistor and the voltage divider of the TL431, but when the output voltage continues to increase by adjusting the divider resistance, the output voltage reaches 17V and goes into blocking mode. I think it should have a lot to do with the feedback loop design.
Thanks again! I need your support now!
In reply to chime xia:
Thank you very much!
My design requirements:
1. Input voltage: dc 2.7 V to 3.3 V, current 5 A;
2. Output voltage DC 36 V.Output current is not required, as long as the efficiency is over 82%.;
3. Require isolation;
4. Efficiency 82% min;
The design has been modified with reference to WEBENCH.
The schematic diagram has been attached, please refer to it.
Thank you for your reply, I will continue to look forward to your reply!
Thank you !
Do you have any comments on this issue?
Here I also attached the layout, thank you.
In reply to Lin Zhao:
In reply to Jerry Hsueh:
In reply to Sonal Singh:
May you please plot OUT, VCC and VSD pin waveforms to look into this, I would like to understand the power demand from the controller during load conditions.
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