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PSPICE-FOR-TI: TPS2491_PSPICE_TRANS负载使用电流源的疑惑?

Part Number: PSPICE-FOR-TI


1.问题一、正常测试电路如下,电流源负极接GND

2.测试结果,在MOS关断的情况下,为什么负载电流源还有电流?电流并没有变为0。

3.问题二、按照我的理解,电流源的电流方向也是从负极流入正极流出,电流源应该正极接GND,接好后仿真没有错误,但是仿真结果好像不对,结果如下,怎么解释?