BQ76200: 单独控制电池放电

您好,是否方便提供完整的电路过来看一下。

完整电路不太方便，咱们先说第一个问题吧，DSG_EN这个引脚如果PACK+的电压是9-60V，对于芯片引脚输出来说可以吗？

你这里只是说的电压，没有说电流，DSG_EN的输入电流需要限制吗？

我是想做一个小开关来驱动一个大的电流开关，小开关部分使用电阻分压来做，需要知道你们DSG_EN的电流是多少，我才能方便做多大的电阻，限制手册上只有电压，没有电流，那意思是电流多少都无所谓吗？比如我使用一个10V 100A的信号，可以吗？

您好，还是没有回复吗？

您好，I do not believe this was characterized. As long as the voltage on the pin does not exceed the ABS max of 15-V, it should be okay.

电压是一个特征，那么电流呢？比如我使用电阻分压两个1K或者100M的电阻，分压都可以分到5V，那这两个5V是都可以用了驱动DSG_EN引脚吗？

我们要从实际使用出发，而不是说只要电压不超过15V就可以，两个1K的电阻分压得到的参考电压和两个100M的电阻分压得到的参考电压是不一样的

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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1249675/bq76200-bq76200

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那您把我画的电阻分压的发过去吧，这样不就知道了啊

您好，已经发帖询问更了解这款芯片的TI工程师，收到回复第一时间通知您。

您好，非常抱歉回复晚了

What is the function of this circuit? Particularly C1. What is at CN1? 

With this, I still would not expect much current to flow into the DSG_EN pin. If PACK is 60-V, there would be a ~50.9-V drop across R2 due to the D1 9.1-V Zener, which would correspond to about ~509-uA of current through this resistor. Approximately ~303-uA of this amount would be flowing through R5, which means there would be ~206-uA of current flowing through either D1 or R4. 

There is a 1-MOhm pull-down (typical) on the enable pins (Mentioned in Section 6.5 Electrical Characteristics - INPUT ENABLE CONTROL SIGNALS of the datasheet). So I would expect that the DSG_EN would be sinking ~9.1-uA of current with this circuit. Which sounds okay to me. This would mean there would be ~197-uA of current through D1.