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LM5122参考电路设计疑问

Other Parts Discussed in Thread: LM5122, PMP11112

在PMP11112 REVB.SchDoc中给出了LM5122用于四相交错并联的参考设计,在四个SYN/RT引脚引入外部电源,但是不是说当四相电路相位差为2π/4时,输出纹波电流最小效果最好嘛,但是外部电源由十进制计数器CD4017BM96 的“0,1,2,3”四个引脚输出,相位差应该是2π/10,为什么要这样设置?为什么不使用8进制计数器,在“0”“2”“4”“6”或者“1,3,5,7”输出,这样相位差不是2π/4嘛?tidro78.pdf