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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  • 0
    •  Analog Employees 
    on Jul 19, 2018 11:49 PM

    Hi Garibaldi, 

    I believe the LT8410 circuit you mentioned would work for you with no problem. This part has >3 times the switch current capability.

    Efficiency does degrade with lower inputs, but I think the main issue is the lT8410-1 just does not have enough juice to make it to the finish line, so it gets stuck peddling as fast as it can.

    Please try the LT8410 and let me know if that solves your problem. 

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  • 0
    •  Analog Employees 
    on Jul 19, 2018 11:49 PM

    Hi Garibaldi, 

    I believe the LT8410 circuit you mentioned would work for you with no problem. This part has >3 times the switch current capability.

    Efficiency does degrade with lower inputs, but I think the main issue is the lT8410-1 just does not have enough juice to make it to the finish line, so it gets stuck peddling as fast as it can.

    Please try the LT8410 and let me know if that solves your problem. 

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