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关于充电管理芯片bq2954的问题

Other Parts Discussed in Thread: BQ2954

请问BQ2954的温度信号输入引脚,即第八脚TS可不可以悬空,为什么我上拉到5V或下拉到0V,芯片都不能正常工作。而我在引脚上飞一根线,什么都不接,这时候,可以正常工作

  • TS脚用来采集电池温度,不能悬空。

    对其接高接地分别表示电池温度过低或者过高,都会停止充电。(一般电池充电温度范围会在0到45~60度不等)。

    请参考datasheet中有具体说明:

    1) High-Temperature Cutoff Voltage: VTCO = 0.4 ∗ VCC
    This voltage corresponds to the maximum temperature
    (TCO) at which charging is allowed.

    2)  High-Temperature Fault Voltage: VHTF = 0.44 ∗ VCC
    This voltage corresponds to the temperature (HTF) at
    which charging resumes after exceeding TCO.
    3)  Low-Temperature Fault Voltage: VLTF = 0.6 ∗ VCC
    This voltage corresponds to the minimum temperature
    (LTF) at which charging is allowed.