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LM5170应用,只用通道一单通道运行系统,去掉通道二主电路

Other Parts Discussed in Thread: LM5170

请问当我想只使用LM5170的通道一(负载小电池需要电流最多10A),通道二的主电路我想去掉,但是实际做PCB时,只有通道一主电路时,LM5170芯片HO1与LO1不工作,感觉问题出在HB2与SW2接口(HO2与LO2,CSA2与CSB2通过电容直接接地),我直接用电容来接HB2与SW2接口并提供12V,我在TINA上仿真可以运行,但是实际上实物PCB通道一是不工作的,那我应该怎么接这几个通道二的接口?