Overview
IEC 63563-4:2025 - Qi Specification version 2.0, Part 4: Power Delivery - is the IEC adoption of the Wireless Power Consortium (WPC) Qi v2.0 Power Delivery document. The standard provides guidelines and mandatory requirements for Power Receiver design for wireless charging systems, covering circuitry, power consumption, operating power levels, power transfer efficiency, and standby power. It applies to the Qi Baseline Power Profile (up to 5 W) and the Extended Power Profile (above 5 W).
Key topics and technical requirements
- Power Receiver construction: mandatory elements such as dual-resonant coils, rectification circuits, sensing circuits, communications modulator/demodulator, output disconnect and shielding.
- Power profiles & operating levels: definitions for Baseline and Extended Power Profiles and related operating power ranges.
- Power consumption & standby power: requirements and measurement methods to limit idle energy use.
- Power transfer efficiency: definitions and informative guidance for measuring system, transmitter, and receiver efficiency.
- Power transfer control and load management: transmitter/receiver interactions, load steps, load dump tests and over-voltage protection procedures.
- Object detection & foreign object detection (FOD): resonance shift and capacitance-change based detection techniques to ensure safety and correct operation.
- Receiver localization & positioning: guidance for coil-array, moving primary coil, and user-assisted positioning methods for free-position charging.
- Design guidance (informative): coil design, large-signal resonance checks, rectifier and sensing best practices.
- Compliance language & testing: specifies mandatory (“shall”) and recommended (“should”) provisions per ISO/IEC Directives; references WPC materials and measurement procedures.
Practical applications
- Product design and engineering: hardware and firmware teams designing Qi-compatible wireless chargers and mobile devices will use IEC 63563-4 to ensure interoperable, safe, and efficient Power Receiver implementations.
- Test and certification: conformity assessment labs and certification bodies rely on the standard’s measurement methods for efficiency, standby power, load-step behavior and over-voltage protection.
- System integrators and OEMs: companies embedding wireless charging into furniture, vehicles or accessories use the standard to meet Qi compatibility and regulatory expectations.
- Safety and compliance teams: use the object-detection and protection clauses to reduce risks from foreign objects and magnetic field interactions.
Who should use this standard
- Hardware/analog engineers (coil, rectifier, shielding)
- Power electronics designers (resonant circuits, protection)
- Firmware/embedded developers (power control and communications)
- Test labs, certification bodies, and product compliance specialists
- OEMs and product managers building Qi-compatible devices
Related standards
- Qi Specification (other parts): Communications Physical Layer, Communications Protocol, Foreign Object Detection, Mechanical/Thermal.
- ISO/IEC Directives: referenced for compliance language and editorial rules.
Keywords: IEC 63563-4:2025, Qi Specification version 2.0, Power Delivery, wireless charging standard, Power Receiver design, power transfer efficiency, standby power, WPC, Qi v2.0.