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UCC28070 pspice仿真模型问题

Other Parts Discussed in Thread: UCC28070

    官网提供的UCC28070 AVERAGE MODEL 中与实物脚位有差异: 多了IRIPA和IRIPB脚, 没有VCC及GND脚; 试着把IRIPA和IRIPB脚经过10K电阻接GND,仿真出来28070不工作,GDA与GDB无输出。 

    请问IRIPA和IRIPB是什么功能?需要如何接线使用?