Some people will be curious about what is the difference between PD charging and Type-C charging? In fact, the difference between the two is actually quite big. Today, the editor will tell you about it~ The USB Type-A Receptacle on the charging head end is used as the power input

2025/07/0112:20:35 hotcomm 1375

Some people will be curious about what is the difference between PD charging and Type-C charging? In fact, the difference between the two is actually quite big. Today, the editor will tell you about it~

charging head end USB Type-A Receptacle is used as the power input terminal, and the USB Type-B Micro interface is used as the power output terminal.

Without the support of the charging protocol, the charger can only provide a maximum charging power of 5V@900mA (USB3.0 is 900mA, USB2.0 is 500mA) to the outside world.

This is the hardware design specification for the USB Type-A/B interface, so this design provides a maximum charging power of 4.5W.

uses a USB Type-A Plug to USB Type-C Plug cable to charge your phone.

charging head end USB Type-A Receptacle is used as the power input, and the USB Type-C interface is used as the power output.

Type-C interface stipulates that the power supply capacity of the Power Source side depends on the Rp resistor on the cc.

Power Sink terminal cc pull-down Rd=5.1K, and the power supply capacity of the Power Source terminal can be determined according to the cc voltage division.

Generally speaking, the Type-A Plug to Type-C Plug connection cable, the Type-C end Rp will declare that it supports 5V@3A power supply, but it must be equipped with a dedicated charging head.

Because the adapter cable and charging head may not be matched. If the USB Type-A Receptacle on the charging head end can only provide 5V@900mA, then even if the Rp on the adapter cable Type-C Plug end is declared 5V@3A, it cannot provide the maximum charging power of 5V@3A to the phone, and it may damage the charging head.

OK! That’s all for today’s editor’s sharing! If you have any questions, please leave a message in the comment area~

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