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Wireless Power – Ready for Prime TimeJeff Gao – Senior FAE
Tech Shanghai
16th March, 2016
© 2016, IDT
Wireless Power – Ready For Prime Time
Abstract: For many, 2015 marked the ‘tipping point’ for wireless power with major announcements from several key smartphone and infrastructure providers. This paper explores the reasons behind the adoption of wireless power, after more than one hundred years in the wilderness, reviews some of the wireless power technology trends and standards and looks to the next phase of enabling mass market adoption.
Content: •Wireless Power Introduction •Market Trends •‘Crossing the Chasm’ •Wireless Power for the Mass Market
© 2016, IDT
• An alternating current in the transmitter coil generates a magnetic field which induces a voltage in the receiver coil.
• This voltage can be used to power a mobile device or charge a battery
Wireless Power Introduction
© 2016, IDT
• Best energy transfer when the coils are similar size and tightly coupled with small separation
Reference: Wireless Power Consortium
Transmitter (Tx)• Power Conversion Unit:
DC-to-AC Conversion• Adapts Power Transfer
– To the need of the receiver– To a required operating point
• Receives Messages– Via communication Packets– By de-modulation of the reflected
load
Receiver (Rx)• Power Receive Unit:
AC-to-DC Conversion • Controls Received Power
– To the need of the mobile device– To the desired operating point
• Sends Messages– Via communication packets– By load modulation on the power signal
WPC Wireless Power System Transmitter Receiver
© 2016, IDT
MI vs. MR Comparison
• Inductive solutions are more efficient when displacement is minimal• Standardization and development efforts occurring around both technologies
Magnetic Technologies Induction Resonance
Magnetic Field Shielded Open
Frequency Range 100-205kHz Fixed 6.78MHz
Coupling <5mm Inches
Tx : Rx 1:1 Charge 1:Multi-Charge
Efficiency 70-75% TBD
Power Transfer 15W Today 3-10W Today
There are advantages and disadvantages to each…
Close Coupling Spatial Freedom
In Mass Production Today
© 2016, IDT
Wireless Power Standards
• WPC Qi (MI) gaining greater traction• >50MU shipped • Large Smartphone Wins
• A4WP (MR): • Multi-device charging and spatial freedom • Larger size, lower efficiency, increased cost? EMI?
• PMA(MI) and A4WP(MR) agreement to merge
© 2016, IDT
Wireless Power Market Trends
• 2015 seen as industry Tipping Point with new products from Samsung, Apple and IKEA
• Cellphone drives the infrastructure• MI solutions will dominate next 2-3
years, at least• Wireless Power Consortium -
Release 1.2 with Extended Power Profile (EPP)
• A4WP and PMA officially merged in June 2015 to form Airfuel Alliance
IHS Wireless Power Report 2015
© 2016, IDT
TM
Wireless Power:Crossing the Chasm Mass Market
Adoption
Value / Cost EfficiencySize StandardsEasy To Use
APPLICATION ISSUES SOLVED●Convenience - Better user experience●Eliminates contact corrosion●Allows for waterproofing / dustproofing●Eliminates connector reliability issues●Alleviates form-factor constraints
© 2016, IDT
Reaching the Mass Market
• ‘Ready-to-go’ kit in compact form factor• Easy import to customer design• Extensive support collateral
© 2016, IDT
Ease of Use – Development Kits
Turnkey 5 W Wireless Power Transmitter and Receiver Solution
• Fast prototyping
• Simplified designintegration
• Proven, Qi-compliantsolution
© 2016, IDT
Ease of Use – Development Kits
Turnkey 5 W Wireless Power Transmitter and Receiver Solution
• Fast prototyping
• Simplified designintegration
• Proven, Qi-compliantsolution
© 2016, IDT
Turnkey 5 W Wireless Power Transmitter and Receiver Solution
• Fast prototyping
• Simplified designintegration
• Proven, Qi-compliantsolution
By 8:05 it wasconverted inand sealed
Kits arrived5:00 pm
© 2016, IDT
Reference Kit for the Mass MarketEasy to design-in and highly-accessible 5 Watt Qi-compliant wireless power solution (Tx & Rx).
•Fast prototyping- Plug-and-play functionality- Compact form factor
•Seamless design integration- Extensive documentation- Layout import files- FOD tuning guide
The only wireless power solution with comprehensive design-in collateral and a fully-optimized reference layout that can be easily ported to any board.
Availability Available NOW
URL: www.idt.com/go/WPkits
P9038-R-EVK P9025AC-R-EVK
+DatasheetsBoard user guidesSchematicsLayout import filesGerber filesBOM and direct-purchase linksBoard start-up / how-to videosLayout import videoLayout guide app note
FOD tuning guide app noteFOD tuning calculator (Excel)FOD tuning guide how-to videoRef solution marketing videoRef solution product briefDevice (IC) marketing videos
Kits available at distiEntire BOM available at disti
“The Product”
13
68mm (total)
34mm
84mm (total)
54m
m
17mm
29mm
© 2016, IDT
P9038-R-EVK Features & Benefits
14
Features Benefits
Integrated power stage Low BOM cost, small PCB area, low mfg. costs
Proprietary slew rate control Low EMI, up to -10 dB below CISPR specification
2-layer PCB reference layout Low cost, easily ported to system board
High efficiency Low thermal dissipation
Input in-rush control Prevents surges with inexpensive USB/standard adaptors
Fully-functional reference board Fast prototyping
Extensive support collateral Eases design-in effort for faster time-to-market
EEPROM
P9038
USBFET
Micro USB
D1D3
RESET
IO6
IO5
IO4
IO3
IO0
IO2
/EN
GND1 WP
SCL
SDA
LDO5V
GND
VIN
Score line for coil separation
Micro-USB input
Easy-access I/O connection points
LED status indicators
Easy-access power input
(optional)
Non-circuit thermal dissipation area
Non-circuit thermal dissipation area
High-efficiency coil w/ spacer
© 2016, IDT
P9025AC-R-EVK Features & Benefits
15
Features Benefits
Single-chip solution Low BOM cost, small PCB area, low mfg. costs
Programmable FOD Provides flexibility for various applications
Qi-compatible (WPC 1.1.2) Enables widespread interoperability
Optimized PCB reference layout Low cost, easily ported to system board
Fully-functional reference board Plug-and-play prototyping
Extensive support collateral Eases design-in effort for faster time-to-market
P9025AC
Easy-access I/O connection points
LED power indicator
Non-circuit thermal dissipation area
High-efficiency coil, face-down (uses PCB as spacer)
GND1 VRECT INT
STAT
OUT
GND
CHG_END
/EN
TEOPSDAI2CRAILSCL
Score line for coil separation
Easy-access power output
Non-circuit thermal dissipation area
© 2016, IDT
Drop-in Layout Module
16
• Layout import file facilitates “drop-in” to system board – no tweaking necessary• All inputs and outputs have been placed around edges for easy integration• Special layout needs/issues will be referred to a third-party support team
Other Circuitry
Drop-in layout
Customer’s System Board
IDT Tx Reference Board
© 2016, IDT
Reported Power (Measured by Rx)
Foreign Object Detection (FOD) Primer
Power Delivered (Measured by Tx)
I f Delivered - Reported > 350mW, then an FOD event has occurred
© 2016, IDT
Foreign Object Detection Setting
• Changes in Received-Transmit Power caused by ‘ambient’ conditions can be tuned out
• P9025AC receiver has flexible FOD trims implement
© 2016, IDT
Step-by-step FOD Tuning Guide• Boards are factory tuned for Qi compliance, and can be used AS IS• FOD tuning guide provides instruction and Excel tool for making
adjustments on the bench with resistors• Custom/precision profiles to be supported by third-party
User inputs basic voltage and current measurements
Spreadsheet calculates best FOD bank selection and offset resistor values
19 © 2016, IDT
P9038-RQi Wireless Power Tx with Integrated Inverter
Features:VIN Range: 4.5 – 6.9VSupports up to 8W (RX) power transfer – 1.6AIntegrated Power Stage
Minimizes real estate & BOM cost Very low RDS(ON) offering high efficiency
Proprietary slew rate control Eliminates the need for EMI filter
Input Source Voltage Flexibility USB or AC Adaptor
Programmable input in-rush control Supports both USB and AC Adaptor Prevents surges with low cost adaptors
Integrated current sense & FOD amplifierInput Over-Voltage ProtectionWPC-1.1 compliantProprietary backchannel communicationOver-current protectionAvailable in VFQFN- 7m X 7m 56 pin-40 to +85°C temperature range
IDTP9038
LCTX
IN
SCL
SDA
REG_IN
EN
RESET
LDO2P5V_IN
RESETSCL
SDA
LDO5V
VFOD_SNS
LDO2P5V
GPIO6
CLDO5V
LDO5V
COUT_T1
CLDO2P5V
GPIO0GPIO1GPIO2GPIO3GPIO4GPIO5GPIO6
REFGND
GPIO5GPIO4GPIO3GPIO2GPIO1GPIO0
BST1CBST1
BST2
SW1
SW2
CBST2
GATE
VBUS_SNSADAPTOR
ISNSP_IN
ISNSN_IN
ISNS_V
INV5V_IN
CHPF
ISNS
HPF
ISNS_V
OVP_SELPGND
EN
Status Production release
Availability Samples and EVK now
Production Now
© 2016, IDT
Features:Fully integrated single chip wireless power receiver6W output PowerIntegrated tracking LDOOutput Voltage up to 5.5V77% Peak System Level Efficiency WPC-1.1.2 ComplianceIntegrated synchronous full bridge rectifierPower good status pinProgrammable current limit
Lower power settingsActive low enable functionI2C interface – read back
Die temperature, VREC voltage, resonance frequency,Available in WLCSP 3X3mm – 36 & QFN5X5-32 packages
Safety Features: Foreign Object Detection [FOD] Under voltage lockout – UVLO Over temperature/Current/ Voltage protection
P9025AC-RQi Wireless Power Rx with LDO Output
P9025AC
AC1
VRECTCRECT
STATR1
AGND
AC2
SCLSDA
SCLSDA
CS
CD
EN
OUT
COUT
5V OUTPUT
Chip Enable
ACM1
ACM2
CMOD1
CMOD2
CCLAMP2
CCLAMP1
CBST1
CBST2
CLAMP2
BST2
BST1
CLAMP1
PGND
ILIMRlim
TEOP
Charge Complete
INT
LRX
FOD1RFOD1
C1
VDD
FOD2RFOD2
Interupt
Temperature Control
CHG_END/CS100
TQFN onlySNS
Status Production release
Availability Samples and EVK now
Production Now
© 2016, IDT
Key Applications and Customer Needs
KEY APPLICATIONS●PC peripherals●Small appliances●Rugged electronic gear●Furniture
APPLICATION ISSUES SOLVED●Eliminates contact corrosion●Allows for waterproofing / dust-proofing●Eliminates connector reliability issues●Alleviates form-factor constraints●Better user experience
22 © 2016, IDT
Wireless Power – Ready For Primetime
• 2015 tipping point for wireless power
• Infrastructure driven by cellphone manufacturers
• Wireless Power ready to ‘Cross the Chasm’
• Enable small to medium mass market companies with ‘Ready-to-Go’ EVK accompanied by collateral
23 © 2016, IDT