VLASTIS: tim PD myslis PD1 nebo co myslis tim PD?
3. USB Power Delivery Versions
USB PD technology has come a long way since its inception. Let’s look at some of its different versions.
1. USB PD 1.0
USB Power Delivery 1.0 came out in 2012 and allowed power delivery up to 100W over one USB cable. USB PD 1.0 included specifications for compliant cables and connectors. It came in traditional USB connector shapes with minor differences to the internal wiring.
PD-compliant cables were compatible with most USB ports while standard USB cables needed to be connected to appropriate ports.
2. USB PD 2.0
Released in 2014, USB PD 2.0 introduced related power rules from USB PD 2.0 rev 1.2 and required the use of USB Type C connectors. The power rules need multiple normative voltages and current, enabling smoother power delivery and usage among devices.
3. USB PD 3.0
USB PD 3.0 was released in 2015. It allows the advanced use of Type C power capabilities and functionalities. One of the most noteworthy features of USB PD 3.0 is role swapping.
Consider this example to understand role swapping. A laptop that charges an external battery via USB is likely to get completely drained. Earlier, the only way to get the power back from the external battery was to remove and reconnect the cable. This worked only if the internal battery was connected through Type A (supplying power) and Type B (receiving power) ports.
Charge Desktop Charger
USB Type C charger eliminates this problem through role swapping. As long as the power conditions are met, the computer and the external battery can quickly swap roles. The laptop can become the power consumer instead of the provider. The battery would charge the other way. This would happen without the need for reversing the cable or using multiple ports.
Role swapping works not only with charging, but also with data communication. Further, data communication can take place without interruption as the power role changes. Simply put, data can continue to flow in a single direction even as the power direction changes.
Related article: PD 3.1: The Next Generation of Chargers
What is PD 3.1? A Complete Guide to Power Delivery 3.1https://blog.ugreen.com/power-delivery-3-1/