USB Type-C / PD has been widely recognized by customers around the world since its launch. Sinodec Industrial Co., ltd. Is a Chinese factory specializing in the production of USB cables. In order to let customers know more about this latest hot technology, we have collected some  FAQ, to share with you as follows,

☞What is the difference between USB Power Delivery (USB PD) and USB Type-C?

  USB Power Transmission (USB PD) is a protocol specification that supports up to 100W of power transmission and data communication in one cable.

■ USBType-C is a brand-new non-directional USB connector specification that supports a variety of new standards, including USB 3.1 (Gen1 and Gen 2), Display Port, HDMI, and USB PD.

■ The USB Type-C port can support up to 5V3A power transmission by default. If USB PD is implemented in the USB Type-C port, it can support up to 100W power transmission.

Therefore, having a USB Type-C port does not mean that it supports USB PD.

☞ Is the USBType-C connector mandatory for the USB 3.1 Gen 1 or Gen 2 specification?  Is USBType-C equivalent to USB3.0 / 3.1?

■ At present, we can use traditional Type-A or Type-B connectors to support the Gen 1 and Gen 2 specifications. The USB Type-C specification is a new interface certification specification released by the USB Developer Forum (USB-IF).  It can support up to 100W power transmission and non-directional forward and reverse insertion. All USB 3.1 Gen 1 or Gen 2 products can use USB Type-C interface.

So our answer is: The USB Type-C specification is independent of the USB 3.1 Gen1 or Gen 2 specification.

☞What are DFP, DRP and UFP?

■ DFP (DownstreamFacing Port) is a USB Type-C port installed on the host or hub and connected to the device. ■ UFP (Upstream Facing Port) is a device or hub connected to the host or hub.

DFP-connected USB Type-C port.

■ DRP (Dual Role Port, dual-purpose power role is a definition of a USB Type-C port as a source or sink role.

The above DRP is different from the dual-role power interface. The dual-role power interface refers to a power port that can be used as a Power Source (provider) and sink (consumer). For example, a USB Type-C port on a laptop computer supports DRP (ie  Type-C dual-role power interface), can be used as a Power Source (when a removable disk or mobile phone is connected) or as a sink (when a display or power adapter is connected)

☞What is a configuration channel (CC) line?  What is the maximum speed of the CC bus?

The CC bus is a data line used for USB-PD communication between the port and the EMCA.

■ The USB Type-C socket has two pins CC1 and CC2, one of which is based on the direction of the plug of the USB Type-C connection, and is recognized as a CC line.

■ For USB Type-C plug, CC cable is fixed.

■ CC line can run the following functions:

Detect USB Type-C plug orientation to establish USB data bus routing

Detect USB port connection from DFP to UFP

Establish the role of DFP and UFP between ports

Find and configure VBUS

Configure VCONN

Find and configure optional alternate and accessory modes

The bit rate of the CC line ranges from 270 Kbps to 300 Kbps, and the rated value is 300Kbps.

☞ What is the difference between Cypress USB-PD2.0 and Qualcomm QC Fast Charge?

USB-PD 2.0 is a protocol developed by USB-IF, which can provide a power supply mechanism between USB devices with a power of up to 100 W (20V, 5A). It can also support both USB and non-USB in USB Type-C  Data signals, which allows the host and peripherals to flexibly negotiate the direction of power supply.

Qualcomm Quick Charge  is Qualcomm's proprietary charging protocol. A custom charger that supports the Qualcomm Quick Charge protocol is used to charge devices that also support the protocol.  Quick Charge 2.0 can transmit up to 60 W of power, but unlike USB-PD, Quick Charge 2.0 cannot support both power and data transmission, and it does not support the flexible choice of power supply direction during charging.

☞ What is the maximum number of Power Delivery Objects (PDO) that the Cypress USB-PD controller can support?  What are the supported power profiles?

Cypress USB-PD supports up to 7 PDOs for source and sink applications.

■ The USB-PD specification does not require which power profiles the application device needs to support.  Source and sink PDOs depend on the application design.  Part A.1 of the USB Type-C specification defines a standardized combination of voltage and different current ranges. It should be noted that the power profile defined in Part A.1 is only a recommended power profile, not a mandatory requirement, but at least  One can be used to support 5V source PDO