Single package controller supports authentication for safer USB-C power delivery

May 30, 2017 //By Nick Flaherty
Single package controller supports authentication for safer USB-C power delivery
Renesas Electronics has developed the industry's first single package controller to support USB Power Delivery Rev. 3.0 (USB PD 3.0) and USB Type-C Authentication Rev 1.0 for device-to-device authentication with a public key infrastructure (PKI). This avoids problems with trying to charge incompatible or counterfeit devices.

The R9J02G012 USB Power Delivery (USB PD) controller intended for use in a wide range of USB PD products employing direct current (DC) power including AC adapters, PCs, smartphones, other consumer and office equipment, and toys.

The demand for fast charging mobile devices is growing, driving increased demand for high DC power delivery at and over 100W. System designer have so far had to implement their own proprietary fast-charging methods using USB Micro-B connectors. However, with recent smartphone charging/battery incidents, it is critical to offer a safe ecosystem of USB PD compatible products. The USB Implementers Forum (USB-IF), an industry-leading technology consortium, has standardized a set of specifications to provide open, unified and interoperable technologies:

  • USB Type-C Rev 1.2 Specification: For simpler, easier physical connection of cables, chargers and devices
  • USB Power Delivery Rev 3.0 Specification: For higher power delivery protocols with additional performance, safety and upgradability features like PD firmware update
  • USB Type-C Authentication Rev 1.0 Specification: For device-to-device authentication allowing system manufacturers to implement additional charging policies for trusted high-power charging over USB Type-C

Renesas has adopted all three standards in the new USB PD controller for USB Type-C port control on any USB PD devices. All connecting ports to these USB PD devices with the R9J02G012 will be able to electronically verify and trust its authenticity based on the certificates and public key infrastructure (PKI) defined in the USB Type-C Authentication specification. This mechanism allows system manufacturers to implement policies to examine the genuine origin of the connected PD devices such as cables and chargers before a high-power charging (eg, 20V at 3A) is executed.The R9J02G012 provides support for USB PD 3.0 and USB Type-C Authentication to identify genuine or counterfeit devices. Using its experience in secure microcontrollers (MCUs), Renesas has incorporated highly tamper-resistant technology and information management technology to prevent security attack attempts on MCUs and used them in the R9J02G012.


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