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Hello, we use an electrical design that combines the two components LTC4085 and LTC2941

We wanted to know if the LTC2941 pin 5 "CHARGE COMPLETE" can be connected to the LTC4085 component that handles charging.

If possible we would be happy to get a reference design or guidelines that it requires to work.

Attached part of electrical design and the two components.

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  • Hi,

    We want to synchronize between the charger LTC4085 to the LTC2941, in order to make sure the LTC2941 always show the 100% level of the battery correctly and without the involvement of out uC .

    In some cases, after 12 hours of charging the uC read via the I2C battery level 50% or less.

    We found that the LTC2941 can initialize itself automatically to 100% via the signal "charge complete"

    We believe it solves our miss matching of reading the battery level.

    Thanks,

    David

  • Hi,

    We want to synchronize between the charger LTC4085 to the LTC2941, in order to make sure the LTC2941 always show the 100% level of the battery correctly and without the involvement of out uC .

    In some cases, after 12 hours of charging the uC read via the I2C battery level 50% or less.

    We found that the LTC2941 can initialize itself automatically to 100% via the signal "charge complete"

    We believe it solves our miss matching of reading the battery level.

    Thanks,

    David

  • +1
    •  Analog Employees 
    on Feb 17, 2020 6:45 AM 10 months ago in reply to david project

    When pin 5 of LTC2491 is set to Charge complete mode, it becomes an input pin and accepts Charge complete signal from any charger and sets the accumulated charge register to FFFFh. So you can achieve this without the involvement of uC.