PRIVATE & CONFIDENTIAL

Fady Mishriki – EVP & CTO | fady.mishriki@powerbyproxi.com

27th March 2015

The Resonant Extension of the Qi Specification

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So many different ways to charge things

One thing in common…

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The biggest wireless revolution is yet to come… are you ready?

Harvey Hubbel’s 1904 Invention

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Over 110 years later

A significant change is on the horizon

• from plugging to placing

• from sockets to surfaces

Are we close to “no wires” experience?

Is 2015 the year wireless power goes mainstream?

Mechanical solution Electronic solution

3.5mm audio jack Bluetooth

Ethernet socket Wi-Fi

HDMI & DisplayPort Wireless Display

Magnetic stripe NFC

Micro USB & Lightening Qi Wireless Power

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WPC (Qi) PMA

2 3

2

A4WP (Rezence)

Early 2012…

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Early 2015…

Samsung’s Galaxy S6 and S6 Edge join 682 products with Qi

Every major smartphone manufacturer (except 3) have products with Qi built in

Many major brands are deploying Qi transmitter infrastructure

Qi is the de-facto standard for wireless charging

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The resonant extension of Qi

A solid foundation has been established

How can we build on the success of Qi to date and enable the following new requirements?

• Higher power charging

• Multi-device charging

• Multi-type of device charging (differing power levels)

• Spatial freedom (X, Y & Z) and support for non-planar charging

• Full compatibility with Qi v1.1

• And most importantly: how can we do these things safely (RF exposure), efficiently & without harmful interference (EMI)?

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The resonant extension of Qi…

The WPC resolved to

• Develop a resonant extension of Qi v1.1 that enables these requirements

• Keep “the promise of Qi” - provide 100% compatibility with the existing Qi v1.1 transmitters and receivers

• Establish a special Resonant Task Force (RTF) to evaluate all possible options for extending the specification

• Invite the best companies in the industry to contribute and create a new class of membership (Full Members) to allow contributions by non-steering group members

Many fundamental considerations for the resonant extension to Qi

• Multi-coil vs. perimeter coils

• Efficiency

• Safety – human RF exposure, heating of friendly and foreign metal (FOD), EMI/EMC

• Frequency of operation

• Communications protocol (in band / out of band)

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Qi resonant extension major milestone achieved in Auckland meeting

0.5 draft of Resonant Qi extension agreed by the task force

First resonant system proven to pass pre-compliance testing with Qi v1.1 • Resonant receiver 100% pass

• Resonant transmitter 100% pass

A resonant system compliant with the largest installed base of wireless power

Some highlights of Resonant Qi…

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Ability to focus field exactly where it is required

EfficientInefficient

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Scalability

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Resonant Qi can be as efficient as inductive Qi

Resonant Qi System Efficiency

Average 67%

Max 71%

y17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

y16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

y15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 62 0 0 0 0 0 0

y14 0 0 0 0 66 67 66 57 0 0 58 67 67 58 0 0 57 66 67 67 0 0 0 0

y13 0 0 0 66 68 68 67 58 58 58 68 69 69 59 58 58 58 68 69 67 65 0 0 0

y12 0 0 0 67 69 69 69 67 58 59 67 70 70 67 59 58 67 69 69 67 67 0 0 0

y11 0 0 0 67 67 69 69 67 67 67 68 69 68 68 67 67 67 67 67 67 67 67 0 0

y10 0 0 67 67 67 67 67 67 68 68 67 67 67 67 68 68 67 67 64 67 67 71 0 0

y9 0 0 70 67 66 63 66 67 70 70 67 63 63 67 70 70 67 62 63 67 71 71 0 0

y8 0 0 70 70 63 62 62 63 69 69 66 63 66 66 70 70 67 63 63 67 70 71 71 0

y7 0 0 70 70 67 63 63 66 70 70 66 64 64 67 70 70 67 67 64 67 67 67 0 0

y6 0 0 67 67 67 67 67 67 67 67 67 67 65 67 67 67 67 67 65 67 67 67 0 0

y5 0 0 0 67 67 70 70 67 67 67 67 70 71 68 67 67 67 70 71 70 67 0 0 0

y4 0 0 0 67 67 71 71 70 64 63 64 71 71 71 64 63 64 71 71 71 68 0 0 0

y3 0 0 0 0 68 71 71 70 64 63 64 71 71 71 64 63 64 71 71 71 0 0 0 0

y2 0 0 0 0 66 71 71 65 0 0 64 65 71 65 0 0 0 65 71 0 0 0 0 0

y1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

y0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

EVK 2 Tx3

4 7

8 10

1

7.5W/1.5WPCB Coils (NOT Litz wire)

“Efficiency should be defined as a range based on real-world use”

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Magnetic vision system for device detection and FOD

Friendly Object Foreign Object

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Resonant communications

New in-band communications protocol

Builds on Qi v1.1. communications

Based on TDMA type approach

Allows multiple devices to communicate with a transmitter

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Conclusion

Resonant Qi is coming!

• It will allow designers to build on the largest installed base of wireless power and leverage investments

It will allow many great new features

• Higher power charging (= fast charging)

• Multi-device charging

• Multi-type of device charging (different power levels)

• Spatial freedom (X, Y, Z) and support for non-planar charging (3D)

• Full compatibility with Qi v1.1

It will allow superior performance

• Inductive-like efficiency and excellent thermal performance

• Better device detection and FOD

• Easy of designing safe (Human RF exposure) and EMC compliant products - minimal exposure to radiated magnetic field by design

• Easily scalable for bigger/more devices

More detailed information available to Regular and Full members of the WPC

PRIVATE & CONFIDENTIAL

Fady Mishriki – EVP & CTO | fady.mishriki@powerbyproxi.com

Thank You