LT8410-1 Booster Circuit Current Draw

Hi,

I'd like to get some support regarding Linear's LT8410-1 boost converter. 

More specifically I am measuring a large disrepancy between simulated current consumption (using LTspice) and the reality of my circuit. 

To be more precise the boost converter is set to convert about 3.4V to 13.25V or 26.5V. I am measuring about 150uA current drawn from my supply in the first case and about 3mA in the second case. LTspice simulates an average current draw of ~130uA in the first case and about 250uA in the second case. 

The situation is a bit more complicated but I would like to discuss this in private if possible with one of the support engineers.

Thank you for any support.

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  • Hi Dulcevida,

    Yes, it is a typo. I mean LT8410-1.

    I attached both the schematic and simulation files and I can see them below my post. Can you confirm that they do not show up? Can you provide a company mail to send them directly to you?

    As for the part, it is running at 34.5V output which is tribbled to get to 105V. 

    I understand what you are saying but we are talking about the no-load situation. The part should only be regulating the output and the current draw should be close to the quiescent for this given part for which at 34.5V output is given (in the datasheet) to be about 300uA.

    Please check to see my files.

Reply
  • Hi Dulcevida,

    Yes, it is a typo. I mean LT8410-1.

    I attached both the schematic and simulation files and I can see them below my post. Can you confirm that they do not show up? Can you provide a company mail to send them directly to you?

    As for the part, it is running at 34.5V output which is tribbled to get to 105V. 

    I understand what you are saying but we are talking about the no-load situation. The part should only be regulating the output and the current draw should be close to the quiescent for this given part for which at 34.5V output is given (in the datasheet) to be about 300uA.

    Please check to see my files.

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