电池电压大于5v,使用板上外部分压电路,j5的7,8脚相连,5,6脚相连,见bq34z100g1文档p48图13,但是测量bq34z100g1芯片第四脚bat测不到电压,用示波器看只有一个100多ms的脉冲信号,请问电路上是怎么实现的,难道发测试指令时才有电压值过来?
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电池电压大于5v,使用板上外部分压电路,j5的7,8脚相连,5,6脚相连,见bq34z100g1文档p48图13,但是测量bq34z100g1芯片第四脚bat测不到电压,用示波器看只有一个100多ms的脉冲信号,请问电路上是怎么实现的,难道发测试指令时才有电压值过来?
参考这个帖子http://www.deyisupport.com/question_answer/analog/battery_management/f/35/t/107746.aspx
VEN是为了降低系统的功耗,bq34z100会每s开启一下VEN,测量一下电压,不测量时,分压电阻没有功耗。