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Boost converter Design

Mamarts

I am designning a conventional asynchornuous boost converter with an input of 150mV to 2.8V output, 

But the ripple is to big, I dont know how to optimize this design

  • Dear Mamarts,

    You have not provided enough information. Although I am able to read the component values on your schematic, you have not provided any information about the switching frequency, the parasitic elements (if any) for your inductor and output capacitor, your MOS on resistance(s) and the characteristics of your switching clock (i.e., duty cycle, transition times, etc...).

    Unfortunately, I am unable to read your waveform axes and can barely see the waveform so I am unable to ascertain any information from it.

    I will comment, however, that your boost gain of 2.8 V/150 mV is very, very high for a single stage boost. That alone will require a duty cycle of almost 100% - which is likely not feasible. A typical maximum ratio is 10 and your ratio is 18.6.

    Shawn

  • in reply to ShawnLogan

    Dear Shawn,

    Sorry for the lack of information I provided, I am grateful that you took your time and gave me helpful feedback for my problems. I will try changing my specs to only simulate a single stage boost.

    Mamarts

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