In the traditional usage scenario, the host is mostly used as the power supply terminal to provide power to the connected screen display (or the screen itself is independently connected to the power supply), laptop or hard disk; the mobile phone and hard disk are used as the power receiving terminal to eat the power of the host or laptop  .  It is powered by a USB cable to a laptop computer with a design power of 65 watts, and can be connected to another screen as an extended desktop display.  

When the display, laptop, and tablet all support USB PD, the display, laptop, and tablet can be the power supply end or the power receiving end.  When the laptop or tablet has insufficient power or no power supply, it can be powered by the screen; when the screen requires power, it can also be powered by the host, laptop or tablet.  The two can also transfer power through the USB Hub connection when other devices such as mobile phones, external hard drives, etc. require power, or vice versa to transfer power to the laptop and tablet through the Hub, while still being able to transfer data 

This kind of bidirectional flexible serial application, as long as the USB PD data communication IC is added between the power supply end and the power receiving end of the product, the dream of plug and play can be realized.  The USB PD technology is based on the existing low-cost USB interfaces and cables that have been widely popularized. In the future, the application of various USB PD products must accelerate the popularity, and it has naturally become the most worthy technology application that various manufacturers expect in the future. 

As far as the market is concerned, in addition to Intel (Intel) as the main technology promoter of USB PD, there are many well-known Weltrend, VIA, Richtek, Richtek, Leadtrend Tongjia, NXP NXP, Cypress Cypress, Huineng  Thai and other original chip manufacturers, especially the well-known domestic PD chip leader brand Shenzhen Huinengtai PD products support the power range of 18W to 100W, and also support dual-port and multi-port intelligent power distribution applications, which is very powerful in the PD power market.  Competitive choice.  With the popularization of USB PD fast charging and Qualcomm QC4 + fast charging, there are many devices on the market that support USB PD fast charging, and even many mobile phones have already supported the USB PD3.0 (PPS) protocol, and the number of user groups has also  With the continuous increase, the entire USB PD fast-charge ecosystem has a certain scale, and the market prospect is hot.  It can also be seen from the data that at present, more than 10 chips have obtained the Association's USB PD3.0 (PPS) certification (not included in certification and development), which shows that the original manufacturers' control of the market trend is very accurate  At the same time, with the production and application of these certified chips, I believe that it will not take long before the market's chargers, car chargers, and mobile power supplies will usher in a round of large-scale replacement.