One power supply unit per device, or even per application: for the smartphone, tablet, computer, walkman, BlueTooth speaker, cordless screwdriver, HD display, etc...
The electronics industry is getting virtuous: let's stop with this waste and try to define a common power supply standard for all applications.
The USB-C Power Delivery principle is based on a reversible connector (2 x 12 contacts) and an information exchange protocol between the energy supplier (Source) and the consuming device (Sink).
This device, requiring a certain voltage and current, sends its request to the source via a dedicated pin on the connector (CC, Communication Channel). If the query matches one of the source profiles (PDO, Power Data Object), the negotiation is successful. Otherwise the source delivers 5V 3A max, which is the default profile (Power Safe). And if no device is connected to the source, no voltage is output.
Version 3.1 of the USB-C Power Delivery standard allocates up to 100W of power (20V/5A): needless to say, the USB-C/USB-C cable must be of an appropriate cross-section.
We were seduced by the idea: a single power supply unit to recharge smartphones, tablets and computers. And why not, also power a recorder, a mixer, HD monitors, transmitters or RM receivers. But none of those latter devices are fitted with a USB-C port, just with a basic power connector (HRS4P, XLR4M or barrel jack).
Thus we developed tiny sink interfaces that request the right PDO - matching the device to be powered - from the USB-C power source.
We offer four profiles: 9V/3A, 12V/3A, 15V/3A and 20V/3A. This is what you need to get the most out of the new 63W and 87W USB-C chargers from the Cupertino company, or from certain clones such as compatible USB-C 60W wall power adapters for laptop found on many online stores.
These tiny sink interfaces are available for sale from DC Audiovisuel