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A new version of the USB spec puts additional demands on testing regimes that wring out power-handling options. On the other hand, Apple and Google Pixel phones are a bit different. Both of them use PD 3.0 only. As with Android devices, though, your performance will depend on your device. For example, older Apple devices like the iPhone 7 don’t support any kind of fast charging. But with the iPhone 8 and newer, you get full PD compatibility. Be aware that you won’t get any benefit whatsoever from a QC 3.0 charger. Apple phones simply aren’t compatible with the technology. Take note that the differences between USB PD 2.0 and USB PD 3.0 don't lie in the power rules. The power rules of the two are in fact the same. All USB PD 3.0 devices work with USB PD 2.0 as well. Qualcomm can charge your phone faster than you can read this story". CNET . Retrieved 4 December 2016. looking for a tiny, powerful charger, get it. RAVPower sells two in a set. 2. PD Pioneer 30W 2-Port Wall Charger (RP-PC144)
Standards-Based Charging: For years, the USB Implementer’ Forum (USB-IF), which oversees the USB standard, has been working to globally standardize around USB for charging. The International Electro-Technical Commission (IEC) has long since formally adopted USB, and more recently, USB Type-C and PD.USB 2.0 products: USB 2.0 Adopters Agreement plus the “USB Power Delivery Specification” Adopters Agreement Fast charging allows for optimized charging in the early stage of charging; meaning, you get an improved battery capacity after a short period of charging. Companies do not boast of a full fast charge because power transfer in the concluding stage of charging drops. Table 2 Among three separate chargers used, one was a USB-C PD 3.0 device shipped with a new mobile phone, while other two met the PD 2.0 specification. Source: Infineon Another great feature of USB PD is the fact that the power direction is no longer fixed. In the past, if you plugged your phone into the computer, it would charge your phone. But with Power Delivery, the phone you plug in could be responsible for powering your hard drive. It has been so long since the development of the USB PD fast-charging standard, and they have changed in an exponential way, thus providing different changes, functions, and features that improve with each update and launch. Among them, USB PD2.0 is a fast-charging standard for real mass production and commercial use, and it also lays the foundation for realizing the unification of USB PD fast-charging. The, there is USB PD3.0, which is more updated in terms of protocol recognition function.
The USB Power Delivery (USB PD) Specification extends the USB functionality by allowing for more flexible power delivery and data transmission over a single cable. Its goal is to work with and expand upon the current USB ecosystem. In addition to passing USB-IF compliance testing and inclusion of its Power Delivery products on the Integrators List, companies wishing to use the certified USB logos must have a current on file USB-IF Trademark License Agreement. USB Power Delivery is covered by the relevant adopters agreements for either USB 2.0, USB 3.0, or USB4 ™ depending on the specification implemented. Recommendations for which adopters agreements are appropriate to execute are listed below: The sink device responds with a 32-bit request data object (RDO) that indicates its desired source voltage and current. Another point of interest regarding Power Delivery is that it allows for power to flow both ways, with no set direction based on circuit or connection. For example, if you were to connect two phones that support Power Delivery with a USB-C charging cable, one phone could charge the other and vice versa.
Consumer convenience and the ecological argument
Apple, for instance, uses the USB- PD fast charge for its iPhone XS, iPhone XS Max, iPhone X, iPhone 8, and iPhone 8 Plus. Starting with the USB Power Delivery 2.0 fast charging standard, it was presented to the public in August, 2014. This has the USB Type-C interface, being one of the best known and more used around the world, and although it does not have another type of interface, which could be seen as negative, it has very good functions, among which are charging, data transmission, and audio transmission. With the USB PD 2.0, you can get the voltages 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, in addition to its maximum charging power that reaches the 100W.
Thanks to the advent of the latest Type-C charging technology, modern users can now enjoy the immense benefits of USB 3.2 alongside a significantly-improved Power Delivery 3.0. While the benefits of this new technology are plenty, the three upgrades mentioned above show just how effective and innovative it truly is!Figure 2 A typical battery charging comprises an MCU and a battery charging IC. Source: Infineon Comparing PD 2.0 and PD 3.0 PD 2.0
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