Main lines difference explanation please
What difference between vcc main, vdd main, pp batt, and 5V0 lines ? I’m beginners in this job pleasee explained to me thanks..
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VCC_MAIN and VDD_MAIN are essentially the same thing. The difference is in naming nomenclature. Technically speaking, Vcc (the proper way to write it) refers to the voltage applied to the “collector” pins of the transistors. Vdd refers to the voltage applied to the “drain” pin of the MOSFET’s it is connected to. Double letters refer to power supply voltages.
As the name implies, PP_BATT refers to battery voltages and the 5V0 line is coming from the USB-connected input.
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Is that same with vcc_main on iphone circuit board ?
