LTC6811/LTC6804: Mosfet driving


I'm working on cell balancing system(active cell balancing based on inductor energy transfet between cells)  for my hybrid capacitor battery.

I have 36 cells with 0.8 V to 1.6 V maximum voltage range ( 1.4 V rated voltage) for each cell.

In the datasheet the S(n) output is equal to -Vcell(n) which mean here -1.4V.

Even that they recommend the usage of a PNP transistor but in my case it's impossible because i'm balancing my cells with 6 A or even greater what is more than a PNP transistor can support.

Do you have any suggestion or solution for my case so that i can drive mosfets for my cell balancing system.

thank you in advance.

  • 0
    •  Analog Employees 
    on May 12, 2018 3:09 AM

    These ICs support a passive balancing scheme with relatively low update rate controls. I think there are suitable low Vgs(threshold) PMOS devices that might work in that instance. For an inductive energy transfer method, high-frequency DC-DC converter techniques are required and this would be a significant undertaking, but there are potentially suitable controllers in the Power-by-Linear portfolio (might check into synchronous buck parts to start).

  • 0
    •  Analog Employees 
    on Aug 2, 2018 4:04 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin