USB- Power Delivery (USB PD) is a protocol specification which supports power delivery up to 100W of power while transmitting data in a single cable. It's designed to be a more universal charging standard that allows a range of devices (not just smartphones) to charge quickly over a USB connection. Another benefit is USB PD allows devices to optimize power flow across multiple peripherals. For example, battery-backed devices draw more power than devices connected to external power source, headsets can draw less power than external HDDs.
Type-C is a new reversible USB connector specification that can support a number of new standards including USB 3.1, Display Port and USB power delivery. Even though the latest Smartphones, laptops are equipped a USB Type-c port, but that doesn't mean any USB C charger works with any USB C device. For more information, you can refer to my last blog.
USB Type-C ports supports max 5V/3A. If a USB PD is implemented in a USB Type-C port, it can support the 100W power (5V/20A) defined in the USB PD specification. Thus, not all USB Type-C ports support USB Power Delivery.
In the here and now, USB Power Delivery is a bonus luxury rather than a major shift in charging capabilities. Smartphones aren’t going to use the very high power charging modes, and so far it’s not used to charge phones any faster than other standards. It also adds additional complexities to the USB circuitry and development costs, yet USB Type-C’s 15 watt capabilities alone are enough to charge up a typical smartphone battery considerably in just 30 minutes.
USB C to lightning charging cable (support USB Power delivery) is now available in Snapnator Store, order at http://www.snapnator.com/store/products/118751-usb-type-c-to-lightning-cable-support-usb-power-delivery