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电池电压在3.05V时,BQ25606充电异常

Other Parts Discussed in Thread: BQ25606

电池保护板过放电压在2.8V,当电池过放保护之后BQ25606无法给电池充电,正常没有过放的电池可以正常充电,请问什么原因

  • 输入电压为5V,设置的充电电流为2A。把充电电流设置为1.2A,过放的电池也能正常充电。是什么原因导致过放的电池不能2A充电了?
  • 您好, 数据手册8.3.7.5.2BatteryOver-DischargeProtection有描述,电压在VSHORTZ 和VBAT_LOWV之间应该是precharge 模式。
    如果不能充电,建议您检查电池保护板,是不是MOS关掉的原因。
  • 你好,测的电池电压为通过电池保护板之后的电压,此时保护板的MOS没有关掉。测试将充电电流设置为1.2A就能正常充电;充电电流不变(设计设置为2A),输入电压VBUS调成6.5V,此时也能正常充电。就是输入电压在5V,充电电流设置为2A的情况下,过放的电池(电池保护板MOS确认已开启)无法充电。
  • 您好,请参考下面帖子的答复:
    e2e.ti.com/.../932595
  • 8.3.1 Device Power Up from Battery without Input Source
    If only battery is present and the voltage is above depletion threshold (VBAT_DPL_RISE), the BATFET turns on and
    connects battery to system. The REGN stays off to minimize the quiescent current. The low RDSON of BATFET
    and the low quiescent current on BAT minimize the conduction loss and maximize the battery run time.
    The device always monitors the discharge current through BATFET (Supplement Mode). When the system is
    overloaded or shorted (IBAT > IBATFET_OCP), the device turns off BATFET immediately until the input source plugs
    in again.
    8.3.7.5.3
    System Over-Current Protection
    When the system is shorted or significantly overloaded (IBAT
    > IBATOP) and the current exceeds BATFET
    overcurrent limit, the BATFET latches off. The BATFET latch can be reset with VBUS plug-in.

    希望对你有帮助。