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USB PD3.0 will replace USB PD2.0?

2020-2-4 13:54:07

USB Association announcement: PD 2.0 Silicon and PD 2.0 terminal product certification will be phased out

USB-IF will gradually phase out PD 2.0 silicon (Silicon) certification, will stop USB PD 2.0 silicon (Silicon) certification project on January 25, 2020, and stop PD 2.0 terminal product certification on July 25, 2020.  In the future, there will be unified specifications on the market, and only products that support the PD 3.0 specification will be produced and distributed. Currently, commercial fast-charge technology has been mass-produced. In terms of power points, Huawei 40W and OPPO 50W are the first echelon and the second echelon is  Between 18-30W, represented by Huawei, Xiaomi, OnePlus, OPPO, vivo and other manufacturers, but there are still many mobile phones that can not even reach the 18W charging power, or the default charging accessories do not support fast charging, which mainly refers to  It is an international manufacturer such as Apple, Samsung, and Sony. Currently, there are a variety of fast charging solutions on the market, with different standards: QC and PE fast charging dominated by chip manufacturers such as Qualcomm and MediaTek, as well as OPPO and Huawei.  For mobile phone manufacturers, such as VOOC, SuperChange fast charging, and the USB-IF Association's PD fast charging, for the advantages of the PD protocol, we can borrow a description from Baidu: PD is PowerDelivery, focus on  It is the power transmission process of two or more devices, even a smart grid based on USB interface. The power transmission can be bi-directional, or even networked, and can have a system-level power supply strategy. QC is only a focus of QuickCharge.  The problem is fast charging. The power transmission is unidirectional and does not have power.

Networking capabilities do not support functions other than power supply, but in general, they can be divided into two types: high-voltage low-current and low-voltage high-current fast charging. At present, manufacturers have promoted comprehensive versions of the Type C PD fast charging section  After the festival, we will release free fast charging sample donation channels. The USB-PD protocol is a general standard introduced by the American USB-IF Association to promote industry standards to meet the needs of modern fast charging; this standard covers Qualcomm  , MTK, Huawei, OPPO each had their own agreements, and at the same time they were standardized and supplemented, making it a perfect agreement. Industry giants such as Google and Apple are also accelerating the support and specification of this standard, and  This agreement has been recognized by the Thai Laboratories of the Ministry of Industry and Information Technology of the People's Republic of China. In the future, there is bound to be unlimited development space. The ultimate benefits will be returned to all our consumers. Now it is obviously the beginning of a "revolution".  Will have a bad impact on us in the short term, but know that it will eventually benefit us, according to statistics  There are more than 30 models on the market that use PD fast charge. Among them, Huawei, Samsung, Xiaomi, Nokia, Sony, Meizu, Razer and many other mainstream brand mobile phones have also incorporated the PD fast charge protocol into the charging of mobile phones.  In the configuration, I believe that, driven by the Apple mobile phone, which is one of the mobile phone industry ’s benchmarks, there will be more brand mobile phones supporting PD fast charge in the future. The unification of PD fast charge is undoubtedly an industry trend. There is no doubt that  Popularity is a good thing for ordinary users. Nowadays, a variety of fast charging technologies are developed by the manufacturers themselves. The conditions for realizing fast charging are harsh, and mobile phones, chargers, and data cables are one-to-one correspondence. USBPD3 is indispensable.  The popularity of 0 can get rid of this dilemma, all different brands of mobile phones, different brands of fast charge chargers and data cables will be universal, no longer need to find a charger and data cables in the house.


Compared with PD 2.0 for charging function, the biggest adjustment of USB PD 3.0 is to support the Programmable Power Supply (PPS) charging as shown in the figure above. PD 2.0 only supports fixed voltage. PD 3.0 can achieve a maximum range of 3.3-21.0V direct charging.  The minimum adjustable voltage amplitude is 20mV, the minimum adjustable current amplitude is 50mA, and Programmable Voltage and Programmable Current Limit functions can be realized, so this charging standard has very good compatibility; in addition to improving charging efficiency, it can also reduce the impact  The degree of heating of the electrical device during charging, of course, there are other changes to enhance the product's forward-looking cooperation with the future market. For example, it can allow the two parties to connect more clearly to each other's power status, so as to coordinate the power supply strategies of both parties.  The establishment of a low-voltage intelligent power supply network is a great experience, and the digital certificate function is estimated to be the most important function and purpose of the association's upgrade. All TYPE-C products must be issued by the USB-IF organization using a private key.  Digital certificates can be unimpeded, and products without certificates may not be used by other manufacturers  TYPE-C products are accepted, does it feel familiar, or is it the same routine as Apple MFI, this feature has very positive significance for companies that have already been certified by IF. Some maliciously reduce the quality and only require fewer competitors.  Of course, you can also avoid unqualified TYPE-C interface devices, which damage normal devices because of quality problems. In enterprise information security applications, companies can also issue security certificates to make non-enterprise internal USB devices inaccessible.  This will be more secure than the existing USB encryption technology, because before the security certification is completed through the CC line, the storage medium and the system are physically isolated, the times are progressing, and product upgrades will gradually develop on the road to secure applications.




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