Microchip Enables Qi 1.3 Wireless Charging with Authentication

By Tiera Oliver

Associate Editor

Embedded Computing Design

March 29, 2022


Microchip Enables Qi 1.3 Wireless Charging with Authentication

To ensure high quality wireless charging power transmitters, the Wireless Power Consortium (WPC) has released the Qi 1.3 specification with the extended power profile. This new specification created demand for high security silicon authentication devices for full-service support.

In response, Microchip Technology announced the new industrial grade TrustFLEX ECC608 and the automotive grade Trust Anchor TA100 combined with Microchip secure key provisioning services for Qi 1.3 power transmitters. This new offering is an all-in-one secure storage subsystem that includes key provisioning for consumer and automotive systems. 

The Qi 1.3 specification now mandates the addition of a secure storage subsystem with secure key provisioning including X.509 certificates to cryptographically verify the source and quality of the certified power transmitter. When a receiver, e.g. in a cell phone is placed on a Qi 1.3 power transmitter, it may initially accept a 5W charge or no charge at all. Then after a successful X.509 based ECC authentication proving the charger is an approved, "do no harm" device, the phone will then safely accept a 15W charge, reducing charging time. 

Microchip is now a WPC licensed manufacturing Certificate Authority (CA), not only offering pre-configured secure storage subsystem solutions that reduce complexity and development time, but also lowering the technical barrier of entry by handling the entire key ceremony with the WPC root certificate authority on behalf of Microchip customers. Microchip provides a complete certified reference design including application MCU, Qi 1.3 software stack, secure storage subsystems with supporting crypto library, and provisioning services for both automotive and consumer applications.

Development Tools

For hardware: 

  • The Microchip ECC608 TrustFLEX is supported by the CryptoAuth Trust Platform Development Kit (DM320118)

  • The TA100 will require the TA100 8-pin SOIC Socket Board (AC164166) or TA100 24-VQFN Socket Board (EV39Y17A) to plug into the CryptoAuth Trust Platform Development kit

Additionally, Microchip offers the Trust Platform Design Suite software development tool for secure storage subsystems and a certified WPC Qi1.3 reference design

  • Both the ECC608-TFLXWPCS and the ECC608-TFLXWPCU are available for purchase at $0.90 up to 10,000 units. 
  • The TA100 is available starting at $1.50 in 10,000-unit quantities for SOIC8 and VQFN24. 

For more information, visit: www.microchip.com

Tiera Oliver, Associate Editor for Embedded Computing Design, is responsible for web content edits, product news, and constructing stories. She also assists with newsletter updates as well as contributing and editing content for ECD podcasts and the ECD YouTube channel. Before working at ECD, Tiera graduated from Northern Arizona University where she received her B.S. in journalism and political science and worked as a news reporter for the university’s student led newspaper, The Lumberjack.

More from Tiera