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CN103746683A 使用集成电路引脚作为限流输入和开漏输出的系统和方法 有权

使用集成电路引脚作为限流输入和开漏输出的系统和方法
摘要：
一种集成电路，包括至少一个引脚且具有连接在基准电压和至少一个引脚之间的至少一个电阻器。电流测量电路在至少一个电阻器两端施加电压，并响应于电压在第一操作模式下测量至少一个引脚处的电流。测得的电流实现集成电路的电流限制设定点的确定。在第二操作模式下，至少一个电阻器包括上拉电阻器，且连接至至少一个电阻器的至少一个引脚包括开漏输出。
摘要（英）：

An integrated circuit comprises at least one pin and has at least one resistor connected between a reference voltage and the at least one pin. Current measurement circuitry applies a voltage across the at least one resistor and measures a current at the at least one pin responsive to the applied voltage in a first mode of operation. The measured current enables determination of a current limit set point for the integrated circuit. In a second mode of operation, the at least one resistor comprises a pull up resistor and the at least one pin that is connected to the at least one resistor comprises an open-drain output.

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