Wireless Power Solutions
WIRELESS POWERSOLUTIONSSTEVE TATEOSIANIOT & SECURITY SOLUTIONSAMF-AUT-T2780 AUGUST 2017NXP and the NXP logo are trademarks of NXP B.V. All other product or service names are the propertyof their respective owners. 2017 NXP B.V.PUBLIC
AGENDAIntroduction – Solutions & Market2. Wireless Power Transfer Technology3. Solutions Portfolio & Roadmap4. Wireless Office5. General Design Considerations6. Advanced Design Considerations7. NFC Integration & Card Detection8. Software & Tools1.PUBLIC1
NXP’s SOLUTIONS ORGANIZATION Cross Business Line organization within NXP Application specific expertise and focus Work at system level, bringing together cross-NXP hardware and software todevelop and support complete solutions For wireless power, this is Qi certified transmitters and receivers, that contain NXPapplication software, libraries, controllers, NFC readers, and power devicesPUBLIC2
NXP WIRELESS POWER SOLUTIONSLEADING THE WAY TO A WIRELESS FUTUREHardwareSoftwareSupportCertification Full Qi certified reference design Optimized BOM Professional grade Qi certified library Customizable application / clean API Application Expertise On-site support up to production WPC consortium co-chair Only available 1.2.1 certified solution Most comprehensiveportfolio of Qi certifiedtransmitter and receiversolutions in industry Most flexible solutions forwide range of endapplications Fastest time to marketChair/co-chair of Working Groups in WPCBoard member of Qi Wireless Power Consortium (WPC)NXP Qi Solutions are golden units in WPC specificationNXP Qi Solutions are part of certification interoperability test bedPUBLIC3
01.INTRODUCTION – SOLUTIONS &MARKETSPUBLIC4
CUTTING THE LAST CORDNXP VISION FOR A WIRELESS FUTUREBroad power level support, from 1W to 90W:Covering wearables, to PC peripherals, to smart phones, to tablets, 2-in-1s and notebooksTrue power source operation where it mattersMultiple device charging, across power levels:Charge smart phone while charging notebookSingle infrastructure investment supports range of devicesBroad spatial freedom in all directions:Modular transmitter coil arrays to scale spatial freedomEnhanced safety and security:In application payment and ID card / tag protectionAnticounterfeit and OEM specific authenticationWPC Qi alignment:Power delivery, communications and safetyPUBLIC5
IN-VEHICLE WIRELESS CHARGINGMARKET ADOPTION Highly sought after convenience feature for consumers globally – unobtrusive and safe invehicle operation First generation designs, using 5W technology, now visible in market Market moving to 15W to improve user experience (3x reduction of charge times)Sources:- Strategy Analytics, Automotive Wireless Device Charging -2016Update: Two Standards Vie for Market Dominance, March, 2016- ABIresearch, Wireless Charging Technologies, September 30,2015PUBLIC6
IN-RETAIL INFRASTRUCTURE BUILD OUTMAGIC LINK and PACIFIC COFFEE (#2 coffee chain in China) In table, wireless charging transmitters Convenience for customers Value added retailer servicesPUBLIC7
HIGH CONSUMER DEMAND FOR LAPTOPS Q: Which of the following devices would you expect wireless charging to beembedded in the future?Source: WPC, Jan ‘1775% of consumers expect wireless charging in laptopsPUBLIC8
TIPPING (OVER) POINT FOR SMART PHONES?PUBLIC9
607 Qi CERTIFIED PRODUCTS IN MARKETPUBLIC10
NXP IS KEY CONTRIBUTOR IN WPCChair/co-chair of Working Groups in WPCBoard member of Qi Wireless Power Consortium (WPC)NXP Qi Solutions are golden units in WPC specificationNXP Qi Solutions are part of certification interoperability test bedPUBLIC11
WIRELESS POWER DESIGN NXP Wireless Power Solutions platform fulfills all these needsPUBLIC12
02.WIRELESS POWER TRANSFERTECHNOLOGYPUBLIC13
WIRELESS POWER FUNDAMENTALS Electromagnetic Basics Ampere’sLaw: An oscillating electric field produces an oscillating magnetic field Faraday’sLaw: An oscillating magnetic field produces an oscillating electric field It’s easy to implement wireless charging using basic electromagnetic principleTwo Key Wireless Charging Technologies Magnetic Induction (MI): Transmitter coil that creates a magnetic field; receiver coil picks upthe magnetic field and generates electric current. Magnetic Resonance (MR): Both transmitter and receiver coils operate at approximatelysame natural frequencies.PUBLIC14
SYSTEM OVERVIEW Base Station Containsone, or more transmitters Transmitter provides power to receiverMobile Device Containsa receiver that provides power to a load (e.g. a battery) Receiver provides control information to transmitterBase StationMobile trolLoadSystem PowerPUBLIC15
SYSTEM OVERVIEW – POWER CONVERSION Power Conversion Unit converts electrical power to wireless power signal Power Pickup Unit converts wireless power signal to electrical powerBase StationMobile verPower ConversionPowerLoadControlPower Pick-upPUBLIC16
SYSTEM OVERVIEW - CONTROL Receiver controls the power to the output load Tothe need of the mobile device (required power) To the desired operation point (e.g. output current, voltage)Transmitter adapts power transfer Tothe need of the receiver (required power) To the desired operation point (e.g. primary coil current)Base StationMobile r ConversionReceiverControlControlPowerPower Pick-upPUBLIC17LoadSystem
SYSTEM OVERVIEW - COMMUNICATION Receiver sends messages Toprovide control and device information to the transmitter by load modulation on the power signal To receive the device information from the transmitter by de-modulationTransmitter receives messages Toreceive control and device information from the receiver by de-modulation To provide device information to the receiver by frequency modulation on the power signalBase StationMobile Power ConversionReceiverMessagesPowerControlCommPower Pick-upPUBLIC18LoadSystem
POWER CONVERSION - TRANSMITTER Primary coil (Lp) resonance capacitor (Cp) Inverter: e.g. half bridge, full bridge Coil array implementation Controlled by e.g. frequency, duty cycle, rail voltage, phase shiftPower ConversionPower ConversionHalf BridgeFreq -Full BridgeCpPhase shift Lp-Impedance MatchingLmMultiplexerCmPUBLICLp19
POWER PICK UP - RECEIVER Secondary coil (Ls) Serial resonance capacitor (Cs) for efficient power transfer Parallel resonance capacitor (Cd) for detection purposes Rectifier: full bridge (diode, or switched) capacitor Output switch for (dis-)connecting the loadCdLsLoadPower Pickup UnitCsCPUBLIC20
COMMUNICATION – MOD / DEMOD Receiver modulates load by Switching modulation resistor (Rm), or Switching modulation capacitor (Cm)Transmitter modulates frequency by Switching inverter drive PWM frequencyTransmitter/Receiver de-modulates by Sensing coil current (Ip) and/or Sensing coil voltage (Vp)TransmitterReceiverCpCs 1Rm
COMMUNICATION – DATA FORMAT Speed: 2 Kbps Bit-encoding: bi-phase Byte encoding:500usStart-bit, 8-bit data, parity-bit, stop-bitPacket Structure Indicates packet type and message length Message (1 . 27 Byte)010110b0 b1 b2 b3 b4 b5 b6 b7PreambleHeaderMessageOne complete message per packetPayload for control Checksum0(1 Byte)PUBLIC22Stop( 11bit) Header (1 Byte)Parity1 PreambleStart Checksum
COMMUNICATION & CONTROL Start Transmitter provides signal and senses forpresence of an object (potential receiver) Receiver waits for signal Ping Receiver indicates presence by communicatingreceived signal strength Transmitter detects response of receiver Identification & Configuration Receiver communicates its identifier and requiredpower Transmitter configures for power transfer contract Negotiation Receiver sends the negotiation request Receiver configures for advanced power transfercontract Power Transfer Receiver communicates control data Transmitter adapts power transferPUBLIC23
03.WIRELESS POWER SOLUTIONSPORTFOLIO & ROADMAPPUBLIC24
15W (PROGRAMMABLE) FIXED FREQUENCY TRANSMITTERKey Features:Compliant with Wireless Power Consortium (WPC) Extend Powerspecifications to support up to 15W power transferCoil configuration from 1 coil to N coilIntegrated digital demodulationFixed frequency PWM control (improved EMC)Support both Q-Factor and Power Loss FOD methodsSupport key FOB and AM band avoidanceLow standby power consumptionNFC readySupports PMA SR1 specifications and Samsung Galaxy Fast Charge Availability & Certification:Voltage/current/temperature protection AvailableNXP embedded wireless charger software libraries to provide maximumdesign freedom and product differentiation Qifor demo NOW!Certified – NOW!FreeMASTER GUI tool to enable customization and calibrationCompliant with the Qi v1.2.3 specificationPUBLIC25
EXAMPLE TRANSMITTER BLOCK DIAGRAMAvoid environmental and dropped call concernsTemp.SensorHalf-BridgeVinVrailFET Driver*DigitalBuck RegFull-BridgeDemod/ Sense2x FET WCT10xx3.3VNFCTransc.100MHz32 bit DSCSPIRFID ReaderSPI 128KB Flash 32KB RAMCANOther functions: antenna coupling, LED, User Interface, * NXP MP81 half-bridge driver with integrated current sensorGPIOFeatures Delivers full 15W to receiver (Customizable) Fixed frequencyoperation (variable frequency optionavailable) 70% power transfer efficiency Foreign object detection to maximizeuser experience Single coil or Multi-Coil configurationoptions Multiple communication peripheralsintegrated Improved EMI protection to meetvarious standards Implement NFC to support carddetection use case & in applicationfirmware updates Digital Buck regulator Lower BoM cost Optimized active and standby powerwith controller WCT10xx Half-bridge driver with integratedcurrent sensorPUBLIC26
MWCT101x TRANSMITTER DEVICECoreInter-module Cross BarSystem4ch DMADAC1ch/12bitHi ResPWM6ch100MHz4 x Analog 2 x HS ADC8ch/12bit 4 TimersCMP 6b DAC with PGAMemory ResourceProtection UnitTemp SenseCommunicationSCI SPISILICON 100MHz core (Flash and RAMaccess) Up to 288KB Flash / 32KB RAM 6 channel PWM (312ps resolution) 2 x 8 channel ADC (300ns conversionrate) 4 channel DMA controller 5V Tolerance GPIO 64LQFP*CAN MemoryI2CFlashUp to 288KBWatchdogSRAMUp to 32KBClocksPower Consumption Active Run IDD 67.7mA; IDDA 16.7mAADC current 44.6mA at 300ns perConversionADC current 11.4mA at 720ns perconversionSleep VoltageRegulatorIDD 0.56mA; IDDA 12uAADC current 0.01mA Software Closed loop PID algorithm Foreign Object Detection Digital demodulation (ASK/PSK) *CAN driver (Auto version only) I2C / SCI / SPI drivers Support dual-mode solutionsPUBLIC27
PN7362 NFC CARD DETECTION Protects ISO/IEC 14443 type A and type B, MIFARE,FeliCa, ISO/IEC 15693 and ISO/IEC 18000-3 mode 3NFC cards and tags, proprietary tags may be added.Distinguish between physical and emulated RFID/NFCcardFast card-protecting response even during ongoingcharging processSpecial NFC antenna design assuring low couplingwith charger coil and maximizing coverage anddetection distanceReference design compatible with WCT1011 15WSingle Coil TX*Multiple power supply options: WCT board, external orUSB, board can also be used in standaloneconfigurations as PN development boardLEDs for system status indicationContactless CarddetectedSTOPSoftware Supports two-way communication UARTwith WCT reference system. Supports debug SWD interface Supports In-System programming overUSB interface Free MCUXpresso IDE to supportsoftware development Free NFC Cockpit tool to enablecustomization and calibrationSTARTOPERATIONLPCDPollingNo NFCtechnologyCard Emulation inphonedetectedSTARTCHARGING*see: 28
MP81 HALF BRIDGE DRIVER (Proposal) Max operating Vin/Iin(DC) 20V/5A* Max rating Vin 24V* Ron of bridge 15 mΩ* Process C14PT Package WLCSPOptional ext. fetsfor high powerBoostVinHDLVL shift* Max ratings can be increased by 5V at the cost ofVcc15% Ron or 10% die-size123aEsbINH LD Voutcvcc HDdINL boostVinsns Gnd45INHINLENsnsIsenseVoutControl BBMsafetyLDIsenseGndPUBLIC29
ApplicationWIRELESS POWER SOFTWARELibrarySDKQi certified library Advanced algorithms (NXP IP) Qi state machineFully customizable applicationHAL layerNFC StackDebugFreeMASTERApplicationNFC StackWireless Charging iverDACDriverSCIDriverQiPMADDMDigital DemodulationProcessorPUBLIC30
NXP WIRELESS POWER SOLUTIONS PORTFOLIO20W – 200WLaptops2-in-1sSmall Appliances15WPhones (next)In-vehicle (2018)ConsumerWCT-200WTXWPR-200WRX30W - 200W30W – 200WSingle-Coil TxWCT-15WTXAUTOWCT-15WTXAUTOS15W Qi, 5W PMA15W Qi, AutosarMulti-Coil TxWCT-15WTXMULTISingle-Coil Rx15W QiWCT-15W1COILTXFixed FrequencyWCT-15WTX1COIFF15W Qi15W Qi, 5W PMAWPR1500-BUCKWPR1500-LDO5-15W Qi5-15W QiProductionExecutionWCT-5WTXAUTO5WPhones (now)In- vehicle (now)Wearables5W Qi A13, 5W PMAPlanningProposalWCT-5WTXMULTI5W Qi A28, 5W PMANXQ1TXH5WCT-5W1COILTX5W Qi A11 Integrated5W Qi A11 FlexibleTXRXPUBLIC31
VARIABLE FREQUENCY SOLUTIONS(COMMON) FOR CONSUMER APPLICATIONS Lower cost than fixed frequency designs Simpler hardware design Control power transfer by moving the resonance, do not need DC/DC stagePUBLIC32
A11 5W SINGLE COIL TRANSMITTERNXQ1TZH5BD1401 Integrates A5, A11, A12, & A16 WPC Qi V1.2analog and digital functions for 5W SystemSpecificationNo external OpAmp, filter, or biasing circuit neededLess than 10 external passive componentsrequiredThe NXQ1TXL5 is a lower-power, lower-cost optionfor 5W applications that do not require FODEasy FOD Control for coil and capsInternal voltage and current measurement circuitsOn-chip analog and digital filters for robust ASKdetectionLow cost 32.768kHz external crystal for low poweroscillator to achieve standby current of 15µA(typical); System Standby Power of 10mW (typ)Operates supply from 3.5V to 5.25VSmall 5mm x 5mm HVQFN32 packageQi CertifiedReference Documents Application Note:AN11775 User Manual:UM10943 Board Layout Files: Click HerePUBLIC33
A11 5W SINGLE COIL TRANSMITTERWCT-5W1COILTX Target Applications: Wearable Charger, Mobile ChargerFeatures: Compliantwith the Qi v1.2.2 specification Integrateddigital demodulation in chip SupportsFOD based on power loss strategy SupportsDLP feature, then 5V USB port can beas power source Supportsmultiple types of RX modulation signals(AC capacitor, AC resistor, and DC resistor) 100MHzcore frequency chip Availability & Certification: Available WPCfor demo and evaluation now!Qi certification with WCT1000CFMPUBLIC34
A28 5W MULTI-COIL TRANSMITTERWCT-5WTXMULTI Target Applications: WearableCharger, Mobile Charger, Freepositioning Features: Positionfreedom Compliantwith the Qi v1.2.2 specification Integrateddigital demodulation in chip SupportsFOD based on power loss strategy SupportsDLP feature, then 5V USB port can beas power source Supportsmultiple types of RX modulation signals(AC capacitor, AC resistor, and DC resistor) 100MHz Availability & Certification: Available WPCfor demo and evaluation now!Qi certification with WCT1101CLHcore frequency chipPUBLIC35
MP-A4 15W SINGLE COIL TRANSMITTERWCT-15W1COILTX Target Applications: Fast Mobile Charger, Tablet ChargerFeatures and Enablement: Compliantwith the Qi v1.2.2 specification Integrateddigital demodulation in chip SupportsFOD based on quality factor (Q factor)change SupportsFOD based on calibrated power lossaccounting SupportsQi MP receiver with 15W output powercapability Supportsmultiple types of RX modulation signals(AC capacitor, AC resistor, and DC resistor) 100MHzcore frequency Availability & Certification: Available for demo andevaluation now! Qi CertifiedPUBLIC36
MP-A8 15W MULTI-COIL TRANSMITTERWCT-15WTXMULTI Target Applications: Fast Mobile Charger, Tablet Charger, Free positioningFeatures and Enablement: Compliant with WPC-Qi Extend Power Profile (15W)specifications 1st WPC free positioning multiple coils medium powertransmitter solution using frequency control, duty cyclecontrol, phase shift control, and topology switch On-chip digital demodulation Back compliant with WPC low power specifications Support MP FOD framework – Q factor and power lossFOD methods. Low standby power using Our proximity sense technology Voltage/current/temperature protection Robust foreign object detection algorithm 12V input Availability & Certification: Qi CertifiedPUBLIC37
15W RECEIVERWPR1500-LDOWPR1500-BUCK, WPR1500-BOOST Target Applications: Tablet Charger, Fast Mobile ChargerFeatures and Enablement: Compliant with latest WPC medium power specifications Input power (3.5 V 20 Vac peak) from the transmitter via thereceiver coil Power transfer efficiency exceed 75% Support two-way communication, transmitter to receiver by FSKand receiver to transmitter by ASK Hardware protection of rectifier voltage, output voltage andoutput current PCB size 40 mm 40 mm Selected as WPC golden MP receiver receiver:RDWPR1500-BUCKWPR1500-BUCK Availability & Certification: Availablenow!PUBLIC38
15W CASE STUDY Qi medium power compliant solution Supportsup to 15W wireless power transfer Customizable communication and power transfer 75% efficient Enables water immune base No heat synch required Free positioning option Seamless integration into existing power architecture 15W Transmitter WCT-15W1COILTX WCT1011CFM wireless charging transmitter controller15W Receiver WPR15xx-LDO WPR1516CFMwireless charging receiver controllerPUBLIC39
15W RX IMPLEMENTATION Compliantwith latest WPC medium power specifications(Qi V1.2.2) Output power of 10 W (5 V @ 2 A) with 15W transmitter,4W (5V @ 0.8A) with 5W transmitter Low cost and high integration solution with less externalcomponents (FSK demodulation, on-chip wide inputvoltage range LDO, output LDO controller integrated onCortex-M0 based MCU) Software based solution to provide design freedom Coil spec (see next page), but can be customizedaccording to customer requirements (WPC doesn’t specifyany receiver coil spec) 43mm diameter, total about 4mm thickness (including coil,PCB and components) About 60 Celsius degree board peak temperature underroom ambient temperaturePUBLIC40
FIXED FREQUENCY SOLUTIONS(REQUIRED, BUT NOT LIMITED) FOR AUTOMOTIVE Reduced emissions compared to a wide frequency bandAvoid interferences with other wireless control enabled electronics devices Suchas remote keyless entry, gate openers Avoid potential interference with AM band radio Meet the strict regulation in certain countriesPUBLIC41
NXP BASIC AUTO AC/PWMPWMGPIOWCT10XXAWCh, NFCDDMDBGWCT10xxA for WCh andNFC Simple communicationinterface between WCh andcar system(SPI, UART, proprietary, )NFCNCF3340Digital/analogDC/DCMOSPre-Driver 3.3VCAN Physical InterfaceSPIVBAT3.3V5VVRailGPIOMUXCar systemFull BridgeDebugConnectorTouchSW SolutionPUBLIC42
TWO CONTROLLER AUTOSAR ARCHITECTUREVBATSPISBC3.3V/500mA5V/100mA5V3.3VS32K or other MCU forAUTOSAR CAN carinterfaceCANSPIWCT10xxAWCh, NFCS32KAutosar,UARTUARTGPIO 3.3VDACPWMWCT10xxA for WCh andNFCNFCNCF3340DC/DCMOSPre-Driver 3.3VCAN Physical InterfaceSPIVBAT3.3V5VVRailDDMDBGGPIOMUXCar networkFull BridgeDebugConnectorTouchSW SolutionPUBLIC43
SINGLE CONTROLLER AUTOSAR ARCHITECTUREVBATSPISBC3.3V/500mA5V/100mA All functionality onWCT101xSWCh, NFC and AUTOSAR Breakthrough most costefficient one chip solution Full CAN AUTOSAR support3.3VCAN Physical IDACGPIODDMDBGCANWCT101xSWCh, AutosarNFCPWMMOSPre-DriverGPIOMUXCar networkFull BridgeDebugConnectorTouchSW SolutionPUBLIC44
5W (PROGRAMMABLE) FIXED FREQUENCY TRANSMITTERKey Features:Solution: WCT-5WTXAUTODevice: WCT100xACompliant with Wireless Power Consortium (WPC) low power specifications tosupport up to 5W power transferCoil configuration from 1 coil to N coilIntegrated digital demodulationFixed frequency PWM control (improved EMC)Support both Resonance Shift and Power Loss FOD methodsSupport key FOB and AM band avoidanceLow standby power consumptionNFC readySupport PMA SR1 specifications and Samsung Galaxy Quick Charging Availability & Certification: Available NOW! Qi Certified – device, software,and full solution NOW!AEC-Q100 grade 2 certificationVoltage/current/temperature protectionNXP embedded wireless charger software libraries to provide maximumdesign freedom and product differentiationFreeMASTER GUI tool to enable customization and calibrationCompliant with the Qi v1.2.2 specificationPUBLIC45
15W (PROGRAMMABLE) FIXED FREQUENCY TRANSMITTERKey Features:Solution: WCT-15WTXAUTODevices: WCT101xA, NCF3340,SBCCompliant with Wireless Power Consortium (WPC) Extend Powerspecifications to support up to 15W power transferCoil configuration from 1 coil to N coilIntegrated digital demodulationFixed frequency PWM control (improved EMC)Support both Q-Factor and Power Loss FOD methodsSupport key FOB and AM band avoidanceLow standby power consumptionNFC readySupport PMA SR1 specifications and Samsung Galaxy Quick ChargingAEC-Q100 grade 2 certification Availability & Certification: Available for demo NOW! Qi Certified – NOW!Voltage/current/temperature protectionNXP embedded wireless charger software libraries to provide maximumdesign freedom and product differentiationFreeMASTER GUI tool to enable customization and calibrationCompliant with the Qi v1.2.3 specificationPUBLIC46
15W MULTICOIL AUTOMOTIVE TRANSMITTERAUTOSAR INTEGRATION Key Features:Solution: WCT-15WTXAUTOSDevice: WCT1014S, NCF3340,SBCCompliant with Wireless Power Consortium (WPC) Extend Powerspecifications to support up to 15W power transfer with full AutoSAR SupportCoil configuration from 1 coil to N CoilIntegrated digital demodulationSupport free positioning multiple coils low power transmitter solutions usingfixed frequency PWM control (Better EMC)Support both Q-Factor and Power Loss FOD methodsSupport key FOB and AM band avoidanceLow standby power consumptionNFC ready (NCF3340) and CAN/LIN interfaceSupport PMA SR1 specifications and Samsung Galaxy Quick ChargingAEC-Q100 grade 2 certificationVoltage/current/temperature protection Availability & Certification: Available for Q3 2017 Qi Certified – device, softwarenow, full solution Q4 2017Software based solution with NXP embedded wireless charger softwarelibraries to provide maximum design freedom and product differentiationFreeMASTER GUI tool to enable customization and calibrationCompliant with the Qi v1.2.3 specificationPUBLIC47
04.VISION AND STATUS OFWIRELESS OFFICEPUBLIC48
WIRELESS POWER FOR PORTABLE COMPUTERSCUTTING THE LAST CORDSupport 45/65/90W systems, plus TurboCovers entire range of power levelsFits into the tightest industrial design: 2mm in thickness, low component countCooling concerns eliminated:Operates at 90% power transfer efficiencyBroad spatial freedom in all directions:x-y plane, extended z-heightFull application software:Power delivery, communications and safetyPUBLIC49
65W SOLUTION TECHNICAL DETAILSPower:65 WHigh efficiency:80 – 91%Rx – Tx gap (z):6 – 20 mmFree positioning (x/y):30 mm in each directionPrinciple:Resonant inductiveWorking frequency:100 – 145 kHzPUBLIC50
65W RX TECHNICAL DETAILSDell Latitude 11 Keyboard ImplementationRx coil diameter:96mm (customizable)Rx coil ferrite thickness:2mmRx PCB component thickness:2mmOutput voltage:8-25VCan support 2, 3, 4 or 6 cell battery configurationsPUBLIC51
65W TX TECHNICAL DETAILSTX coil diameter:87 mmTX coil ferrite thickness:3 mmTX board thickness:3 mmOverall TX pad thickness*: 4 mmInput voltage:12 – 24V DC(Aligned with USB-C and standardpower sources)*Possible final TX design – not the TX evaluation board thicknessPUBLIC52
05.GENERAL DESIGNCONSIDERATIONSPUBLIC53
COUPLING BETWEEN COILS Good coupling between coils is achieved by Choosing appropriate dimensions of coils (matching size) Keeping the distance between coils small (flat interface surface) Adding magnetic permeable material (shielding) Aligning the coils (next page)Rx CoilShieldingRx SurfaceDistanceTx SurfaceTx CoilShieldingPUBLIC54
COIL ALIGNMENT Guided positioning with tactile feedback Free positioning with moving coil Free positioning with selective activation of coilsin coil arrayGuided Positioning(Magnetic Attraction)MFree PositioningPositioning (CoilFree(Coil Array)Array)AFree Positioning(Moving Coil)yxPUBLIC55
LOW STANDBY POWER Transmitter can enter standby power mode when Nodevice is present, or Present devices need no power (battery charged) ExampleStandby BehaviorTransmitter can apply various methods to react on a receiver Capacitance CapacitanceChangechangeTo detect the placement of a potential receiverE.g. 0.1 mWNo RxObjectResonanceDetectionChangeWake up Resonancedetection , or Resonance change To detect the presence and location of a potential receiverE.g. 5 mW per primary coil when applied every 0.5s Digital pingRx ObjectNoResponseDigital pingNoPower needNormal ModePower needTo detect the presence and location of a receiverTo check for power need of a receiverPUBLIC56
BUILT IN SAFETY Foreign Object Detection (FOD) Q-Factor Powerloss method – monitoring of unexpected losses in the system Surface Smart – comparison of expected and measured resonance curve (conductivematerials shifts resonance frequency)temperature measurementcard destruction preventionOver voltage/current/temperature protection with peripherals Comparators 100%connected directly to PWM modulesafe even when the core is busyPUBLIC57
IT’S NO LONGER ALL ABOUT POWER TRANSFERSafetySecurity & Authentication Advanced Foreign Object Detection(FOD) Detection and protection of paymentcards, passports, RFIDs, etc Fast authentication to ensure safeand seamless interoperability Anti-counterfeit and OEM specificFirmware UpdatePower Control Possibility to update firmware intransmitter through receiver device. Fast feedback loop from receiveroutput voltage/current to transmitterPID regulator during true powertransfer ( 15W).PUBLIC58
06.ADVANCED DESIGNCONSIDERATIONSPUBLIC59
WIRELESS CHARGING CHALLENGES IN AUTOMOTIVE Foreign Object Detection :Selective and qualitative detection of foreign objects around the system (metallic or magnetic objects) is of key importance due totheir ability to absorb energy from the wireless power supply field in the form of heat (parasitic heating) and possibly become ahazard. Smart card destruction prevention. CE4A (Consumer Electronics for Automotive)For all automotive OEM’s, no interference with: Radio AM/FM band (AM band)Remote key / Immobilizer (Most systems operate inside existing Qi frequency range)Capacitive switchNFCAutomotive key points: EnvironmentalHarsh operating temperature rangesHumidity and spill protectionVibration profilesThermal shockShielding effectiveness:The shielding added under the primary and above the secondary is important for the safe operation of wireless power transfer.Without shielding, the magnetic field may interfere with the device or other objects; it may cause battery heating and may circulatecurrent in metallic parts.PUBLIC60
NXP ADDRESSES SAFETY CONCERNS Safety Foreignobject detection: Support resonance shift method for FOD before power transfer Support power loss method for FOD during power transfer Additional coils temperature protectionPUBLIC61
NXP ADDRESSES HARSH AUTOMOTIVE ENVIRONMENT Harsh Environment AlignmentAids Support wire-round type coils and PCB type coils Support multi-coil array for fee positioning alignment with large charging area Large z-gap up to 10mm AEC-Q100certified product Comprehensive system fault protection: voltage/current/temperature protection Emissions/Interferences Fixedoperating frequency to reduce the emission for wide frequency band KeyFOB/Radio Interference Support operating frequency drift to reduce the interference according to specific frequency band NFC co-existenceIntegrated into solution, hardware and NFC stackPUBLIC62
NXP ADDRESSES POWER AND INTERFACE Low standby power consumption Supporttouch sensor for ultra low standby power consumption Support analog PING with intermittent controller deep sleep for low standbypower consumption Vehicle Interface Supportwide support voltage rage from 9V to 16V Ignition interface designed CAN communication interface Support to add wireless charging into car network for better management Support software updating from HMIPUBLIC63
Strict regulations for automotive environmentNeed Pass the auto standard EMC testingNoise Level[dBuV]EMC ]1001000Spectrum magnitude [dBu]Spectrum magnitude [dBu]Desired EMC performance(Rail Voltage control, EMC filter)Bad EMC performance(Duty Cycle and frequency control, no EMC filter)PUBLIC64
INTERFERENCE WITH KEYLESS SYSTEMS AND AM RADIORemote key (system operates inside existing Qi frequency range)Radio AM/FM band (AM band)Need fixed frequency to avoid PUBLIC65
07.NFC INTEGRATION & CARDDETECTIONPUBLIC66
WIRELESS POWER & NFCSafety Detection and protection of payment cards, passports, IDs, etc.Personalization Customize various vehicle settings using NFC as a secure service interface to find thecomfort that is all your own (set up
PUBLIC 2 NXP's SOLUTIONS ORGANIZATION Cross Business Line organization within NXP Application specific expertise and focus Work at system level, bringing together cross-NXP hardware and software to develop and support complete solutions For wireless power, this is Qi certified transmitters and receivers, that contain NXP application software, libraries, controllers, NFC .
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TRENDnet’s AC1750 Dual Band Wireless Router, model TEW-812DRU, produces the ultimate wireless experience with gigabit wireless speeds. Manage two wireless networks—the 1300 Mbps Wireless AC band for the fastest wireless available and the 450 Mbps Wireless N ba
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Wireless# Guide to Wireless Communications Chapter 1 Introduction to Wireless Communications . Wireless Local Area Network (WLAN) - Extension of a wired LAN Connecting to it through a device called a wireless . network Each computer on the WLAN has a wireless network interface card (NIC) - With an antenna built into it .
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Modulating wireless power signal to carry data bidirectionally. Sensing position via the wireless power channel. Sending power via walls, glass or other obstacles. Getting rid of cables for the ease of operators of medical devices. 9 wireless power transfer projects PDF Exploring possible applications of wireless power transmission
Open Intel PROSet/Wireless Click to start Intel PROSet/Wireless when Intel PROSet/Wireless is your wireless manager. If you select Use Windows to manage Wi-Fi from the Taskbar menu, the menu option changes to Open Wireless Zero Configuration and Microsoft Windows XP Wireless Zero Configuration Service is
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