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Power Management ICs

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According to the official PDF, two kinds of circuit boards are produced
One is differential input mode. In this mode, everything works normally. The schematic diagram is as follows:
The second input mode is single ended input mode (in fact, it is also a differential signal, in which a group of differential signals are input respectively from the two negative terminals of the amplifier). In this mode, the amplifier is easy to enter the overcurrent protection state, while in the same or higher volume, the two groups of differential input mode will not have overcurrent protection at all. The schematic diagram is as follows

What is wrong with the second input mode? Cause the amplifier to enter the overcurrent protection state frequently

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