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  1. Replies
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    Closed: Re: LTC4020 component selection

    I know - but there was just not enough space left :bang:



    So this does actually mean, that the first opamp is useless?
    Does this affect the current control loop of the LTC4020? According to...
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    Closed: Re: LTC4020 component selection

    Hi Klaus,

    sorry for the late reply - Project was on hold during vacation time...



    I missed that - you are right. That would result in terrible drifts...
    So the analog part now has its own...
  3. Replies
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    Closed: Re: LTC4020 component selection

    Hello Klaus,

    thank you for your reply!



    I also thought this could be a much easier and cheaper solution. But the VFBmin/max pins also needs to be adjusted in the same way. So i would need...
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    Closed: Re: LTC4020 component selection

    Hello,

    here are the related schematic parts together with my questions:


    First: voltage adjustment using DAC
    154697

    Questions:
    1. Possible that way? I am not sure if i understand the...
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    Closed: Re: LTC4020 component selection

    Forum EDA:


    Hello treez,

    its not necesarry for me to parallel converters, because the maximum charge current capability of 10A is only needed, if the input voltage is 24V or higher.
    If the...
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    Closed: Re: LTC4020 component selection

    Hello Klaus,

    after some time spend over the datasheet and some more calculations we had success with inductor selection.
    Analog devices also confirmed our component selection.

    We are currently...
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    Closed: Re: LTC4020 component selection

    Hello Klaus,

    thank you for your reply!

    What did

    average current here actually mean?
    Is the average current the design current of 10A or is it the value calculated by:

    For Step Down:
  8. Replies
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    Closed: LTC4020 component selection

    Hello,

    i am about to design a buck boost Battery Charger with the LTC4020.

    Design requirements:
    - 10A charge current
    - charge current adjustable
    - 10V ... 48V input voltage
    - different...
  9. Closed: Re: Buck/Boost Battery Charger works on dummy load, but does not charge batteries

    You are right, the LTC4020 should not be in intsant on mode.
    Its also a little bit strange, that the battery float voltage is setup, while the battery is disconnected.
    The voltage should be 29.05V...
  10. Closed: Re: Buck/Boost Battery Charger works on dummy load, but does not charge batteries

    What voltage does the battery have in this case?
    Maybe this is the instant-on feature of the LTC4020? Set by R48 and R49.
    With the populated values (R48 = 24k; R49 = 255k) you should get:
    Vmax ~...
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