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Qi V1.3 Reference design PRX
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WIRELESS POWER
CONSORTIUM
Qi Specification
Power Receiver Design Examples
Version 1.3
January 2021
Qi Specification
Power Receiver Design Examples
Wireless Power Consortium, Inc.
3
Version 1.3
WIRELESS POWER
CONSORTIUM
COPYRIGHT
© 2021 by the Wireless Power Consortium, Inc. All rights reserved.
The QiSpecification,PowerRece ive r DesignExamples, is published by the Wireless Power
Consortium and has been prepared by the members of the Wireless Power Consortium.
Reproduction in whole or in part is prohibited without express and prior written permission of the
Wireless Power Consortium.
may not otherwise be disclosed in any form to any person or organization without express and
prior written permission of the Wireless Power Consortium.
DISCLAIMER
Theinformationcontainedhereinisbelievedtobeaccurateasofthedateofpublication,but
isprovided“as is”andmaycont ain errors.TheWirelessPowerConsortiummakesno
warranty,expressorimplied,withrespecttothisdocumentanditscontents,includingany
warrantyoftitle,ownership,merchantability,orfitnessfor
aparticul aruse orpurpose.
NeithertheWirelessPowerConsortium,noranymemberoftheWirelessPowerConsortium
willbe liablefor errorsin thisdocument orfor anydamages,incl udingindirector
consequential,fromuseoforrelianc eonthea ccuracy ofthisdocument.For any further
explanation of the contents of this document, or in case of any perceived inconsistency or
ambiguity of interpretation, contact: info@wirelesspowerconsortium.com.
RELEASE HISTORY
Specification Version Release Date Description
1.3 January 2021 Initial release of this document.
Qi Specification
Power Receiver Design Examples
Wireless Power Consortium, Inc.
4
Version 1.3
WIRELESS POWER
CONSORTIUM
Table of Contents
1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Structure of the Qi Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Power Profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Power Receiver example 1 (5W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Mechanical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Electrical details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Power Receiver example 2 (5W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Mechanical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Electrical details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Power Receiver example 3 (8 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Mechanical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Electrical details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 Power Receiver example 4 (15 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Mechanical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 Electrical details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Power Receiver example 5 (12 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 Mechanical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Electrical details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Qi Specification
Power Receiver Design Examples
Wireless Power Consortium, Inc.
5
Version 1.3
General
WIRELESS POWER
CONSORTIUM
1 General
The Wireless Power Consortium (WPC) is a worldwide organization that aims to develop and
promote global standards for wireless power transfer in various application areas. A first
application area comprises flat-surface devices such as mobile phones and chargers in the
Baseline Power Profile (up to 5 W) and Extended Power Profile (above 5 W).
1.1 Structure of the Qi Specification
General documents
Introduction
Glossary, Acronyms, and Symbols
System description documents
Mechanical, Thermal, and User Interface
Power Delivery
Communications Physical Layer
Communications Protocol
Foreign Object Detection
NFC/RFID Card Protection
Authentication Protocol
Reference design documents
Power Transmitter Reference Designs
Power Receiver Design Examples
Compliance testing documents
Power Transmitter Test Tools
Power Receiver Test Tools
Power Transmitter Compliance Tests
Power Receiver Compliance Tests
NOTE: The compliance testing documents are restricted and require signing in to the WPC members’
website. All other specification documents are available for download on both the WPC public website
and the WPC website for members.
Qi Specification
Power Receiver Design Examples
Wireless Power Consortium, Inc.
6
Version 1.3
General
WIRELESS POWER
CONSORTIUM
1.2 Scope
The QiSpecification,PowerReceiverDesignExamples (this document) includes several examples of
Power Receiver designs using different power levels. The designs focus on basic mechanical and
electrical considerations in each design without requirements or guidelines.
1.3 Compliance
All provisions in the QiSpecification are mandatory, unless specifically indicated as recommended,
optional, note, example, or informative. Verbal expression of provisions in this Specification follow
the rules provided in ISO/IEC Directives, Part 2.
1.4 References
For undated references, the most recently published document applies. The most recent WPC
publications can be downloaded from http://www.wirelesspowerconsortium.com. In addition, the
QiSpecification references documents listed below. Documents marked here with an asterisk (*)
are restricted and require signing in to the WPC website for members.
Product Registration Procedure Web page*
Qi Product Registration Manual, Logo Licensee/Manufacturer*
Qi Product Registration Manual, Authorized Test Lab*
Power Receiver Manufacturer Codes,* Wireless Power Consortium
The International System of Units (SI), Bureau International des Poids et Mesures
Verbal forms for expressions of provisions, International Electotechnical Commission
For regulatory information about product safety, emissions, energy efficiency, and use of the
frequency spectrum, visit the regulatory environment page of the WPC members’ website.
Table 1: Verbal forms for expressions of provisions
Provision Verbal form
requirement “shall” or “shall not”
recommendation “should” or “should not”
permission “may” or “may not”
capability “can” or “cannot”
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