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BQ27426: Chg DOD Correction Taper Ratio寄存器的配置

Part Number: BQ27426


TI的工程师,您好!

项目在使用BQ27426时,对Chg DOD Correction Taper Ratio寄存器的使用,有些不明白的地方:

1、该寄存器的默认值为2,为什么?

2、当需要修改该寄存器的值时,如何计算?

谢谢!

  • 您好,这个询问更了解这款芯片的TI 工程师,稍后回复。

  • 您好,请参考下面内容:

    The gauge needs to know cell state (Depth Of Discharge, DOD) at all times. DOD is difficult to obtain accurately (ideally with a true OCV measurement and coulomb count). The gauge has a method to minimize DOD error close to end of charge, if the current is below a threshold that is set with this parameter (threshold current = Chg DOD Correction Taper Ratio * DesignCapacity / Taper Rate)

  • 您好,首先感谢您的答复!

    在计算电流阈值的公式中:threshold current = Chg DOD Correction Taper Ratio * DesignCapacity / Taper Rate;

    Taper Rate参数是否指的是下面截图中的Taper Rate?

    另外,公式中的电流阈值threshold current设置多少比较合适?为什么?

    thanks!

  • 您好,这款芯片是预编程三种化学配置文件,默认是4.35 V (3230),如果您用的是这个型号,很多参数不需要修改。

    taper rate是上面这个参数。如果不确定threshold current设置多少,建议使用默认参数。