nxp powerpoint template external 16:9 widescreen
TRANSCRIPT
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EXTERNAL USE
VACLAV HALBICH
SYSTEMS ENGINEER
WIRELESS CHARGING FOR IN VEHICLE
AUTOMOTIVE APPLICATIONS
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EXTERNAL USE1
Agenda
In Vehicle Wireless Charging Trends
Qi Deployment in the Automotive Market
NFC & Wireless Charging Security and Connectivity
Designing in Auto Environment
15W NXP Solution
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EXTERNAL USE2
IN VEHICLE
WIRELESS CHARGING
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EXTERNAL USE3
Charging while
Driving
Avoiding Battery Drain
Eliminating Cables
Improving Safety
Improving Reception ?
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EXTERNAL USE4
Qi Deployment on the Auto Market
Audi Honda BMW KIA VW Hyundai Seat Skoda
Q7, A4 Accord,
Civic, CRV
5 Series,
7 Series
K5 JK, K7,
Sportage
Tiguan Avante, Ecqus Ateca Superb,
Octavia
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EXTERNAL USE5
Need For More Power
Battery capacity is
continuously increasing
More power is essential to
keep short charging time
Extended power profile
15W
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EXTERNAL USE6
WIRELESS CHARGING
&
NFC
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EXTERNAL USE7
Wireless Charging & NFC Security and Connectivity
A seamless secure connection between smart device and smart car
Multitude of use cases from comfort features to safety
Everything in one place
Chrysler ToyotaMercedes
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EXTERNAL USE8
Wireless Charging & NFC Use Cases in Car
BT/Wi-Fi Pairing
• Simple and secure Bluetooth and Wi-Fi pairing
Personalization
• Customize various vehicle settings using NFC as a secure service interface to find the comfort that is all your own
Diagnostics
• Get diagnostic information using NFC as secure service interface e.g. vehicle diagnostics, fuel management
In-car payment
• Use NFC inside of the car as the payment terminal to pay for gas, extra updates, services, ...
Safety
• Detection and protection of payment cards, passports, IDs, etc..
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EXTERNAL USE9
DESIGNING IN
AUTOMOTIVE
ENVIRONMENT
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EXTERNAL USE10
Environment
Harsh operating temperature profile
- Efficiency and heating
- Integrated power supply
- Small package
- Difficult heat dissipation
- Active cooling
Free positioning – car is moving device is moving
Vibration profiles
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EXTERNAL USE11
EMC Restrictions
Strict regulations for automotive environment
Capacitive switch – avoidance of digital pingSpectrum magnitude [dBu] Spectrum magnitude [dBu]
Desired EMC performance
(Rail Voltage control, EMC filter)
Bad EMC performance
(Duty Cycle control, no EMC filter)
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EXTERNAL USE12
Interference with Keyless Systems and AM Radio
Remote key (system operates inside existing Qi frequency range)
Radio AM/FM band (AM band)
Interferences cause bad user experience
WCh
Frequency
band
Remote
key
frequency
band
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EXTERNAL USE13
Safety
Foreign object heating
- Magnetic field flow between Tx and Rx
- Eddy currents in magnetic active materials
Fast position changes
- Unexpected change of position
- Regulation loop is not fast enough to react
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EXTERNAL USE14
15W
WIRELESS CHARGING
AUTO SOLUTION
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EXTERNAL USE15
15W Automotive Wireless Charging Transmitter
Free positioning
Fast charging
Digital demodulation
Back compliant with WPC low power spec
NFC
AEC-Q100 grade 2 qualification
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EXTERNAL USE16
15W Automotive Wireless Charging Transmitter
9-16V Input Voltage range
Possible drop to 6V during ignition
Low standby power
Qi compliant library
Customer proprietary protocols
CAN/LIN
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EXTERNAL USE17
EMC Problem Resolution
EMC filter
Full bridge
Rail voltage control
Fixed frequency 125kHz
- Worldwide enabled band
Capacitive switch
- Avoidance of digital ping
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EXTERNAL USE18
Interference with Keyless Systems and AM Radio
NXP solution enables frequency modification to avoid interference
Remote key (system operates inside existing Qi frequency range)
Radio AM/FM band (AM band)WCh
Frequency
band
Remote
key
frequency
band
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EXTERNAL USE19
Safety
Foreign Object Detection (FOD)
−Q-Factor – comparison of expected and measured resonance curve (conductive
material shift resonance frequency)
−Power loss method – monitoring of unexpected losses in the system
−Surface temperature measurement
Over voltage/current/temperature protection with peripherals
−Comparators connected directly to PWM module
−100% safe even when the core is busy
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EXTERNAL USE20
Application Flexibility
User can fully control all aspects of library from application, develop proprietary
features, easily adapt to new situations and react immediately to potential needs
- Open architecture
- Custom FOD
- Additional application
- Full control of library parameters
- System/user interfaces definition
- Proprietary monitoring/protections
- Proprietary messages between Tx and Rx
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EXTERNAL USE21
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