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The Lowdown on the New USB Fast Charger
Jessica Hopkins

USB-IF, the organization that manages all USB specifications, has developed its own USB Charger program that aims to create a more cohesive and all-purpose line of chargers that consumers can use across all compliant USB Type-C devices. USB Fast Chargers are a recent addition to the USB Charger program. The USB Fast Charger supports the Programmable Power Supply (PPS) in the Power Delivery 3.0 specification, which allows devices and chargers to perform a more precise and fine-tuned voltage level negotiation between each other.


What the New USB Fast Charger Supports

With fixed sources, voltage levels are supplied in increments of 5V, 9V, 15V, and 20V. The Programmable Power Supply function in the USB Fast Charger will allow the power source to provide a more refined range of voltages including 3.0 V to 5.9 V, 3.0 V to 11.0V, 3.0 V to 16.0V, and 3.0 V to 21.0 V. PPS also adjusts current limits in smaller increments so that devices do not attempt to overdraw current levels. Overall, the Programmable Supply helps reduce conversion loss during charging. This concept, along with the USB Type-C connector, will create a more efficient and flexible charging experience for consumers. USB-IF believes that the USB Fast Charger will even become the industry standard for charging.


Advancements and New USB Fast Charger Logo

USB-IF USB Fast Charger Logo

The new USB Fast Charger marker will incorporate the USB certified logo, and it will also include the maximum power level (in watts) the charger can supply. There will be various power levels available, including 45W and 65W. These chargers will also be backwards compatible with devices that support USB Type-C and USB Power Delivery.


Total Phase Supports Type-C and Power Delivery Devices

Total Phase supports the development and manufacturing of Type-C cables and devices utilizing Power Delivery. Our USB Power Delivery Analyzer monitors and displays Power Delivery traffic on the CC1 and CC2 lines of Type-C cables in real time. Users can easily see the power negotiation process and quickly find bugs in the process. The USB Power Delivery Analyzer is able to monitor the PD traffic of the USB Fast Charger as it charges devices.


How Cables are Tested

The Advanced Cable Tester allows users to test Type-C cables (and legacy USB cables) against specific safety and compliance spec parameters. These tests include: continuity checking, DC resistance, cable IR drop, E-marker verification, and signal integrity of the cables. Manufacturers creating USB Fast Charger cables can also use this tool to help gain important insight in the cable as a first line of defense for compliance testing.

If you have any questions, please contact sales@totalphase.com. You can also request a demo for your specific application.

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