USB-C is the abbreviation for USB Type-C interface, which offers high-speed data transfer rates and supports USB Power Delivery (PD) - up to 100 watts (20V @ 5A), which is much higher than USB 1.2 BC (Battery Charger) 7.5 W (5V @ 1.5A) especially for charging purposes.
| Mode Type | Nominal Voltage | Maximum Current |
|---|---|---|
| USB2.0 | 5V | ~500mA |
| USB3.0/ USB3.1 | 5V | ~900mA |
| USB BC1.2 | 5V | ~1.5A |
| USB-C | 5V | ~3A |
| USB PD | Up to 20V | ~up to 5A |
Transmission rate of USB-C can achieve up to 10G / sec, double that of USB3.0 5Gb / sec.
On the Connection interface, USB-C is a symmetrical “reversible” connector, just like Apple’s Lightning interface which can work no matter way it’s inserted in a receptacle, making it more convenient than any other traditional USB plug. No more flipping USB plugs around several times before getting them properly inserted!
The following USB-C connector pin assignment showing 4 pairs data transmission pin - TX / RX / D / CC are reversible and convenient in a circuit design.
Due to the larger current and higher transmission speed, USB-C’s filtering circuit and ESD protection design requirements are much higher than generic USB 2.0 type common today.
To learn more about USB-C design details, please visit here.