st enables the wireless charging world...wireless charging is part of the convergence of smartphones...
Post on 15-Aug-2020
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ST Enables The Wireless Charging World
Wearable
Consumer
Automotive
Wearable Solution
5 V USB powered TX and configurable output voltage 5 V or direct charging mode on RX
Active presence detection, FOD, Li-Ion battery supported
Firmware customization available
Wireless charging reference design – 1 Watt wireless delivery
• Li-Ion direct charging supported• Support for 5 V regulated voltage• Space saving solution with optimized BOM• Up to 3 mm Z
Wearable SolutionWireless charging reference design – 1 Watt wireless delivery
Transmitter STWBC-WA Receiver: STWLC04
1 cm2 cm• 5 V USB powered• Active presence detection• Stand-by FOD• Firmware customization with API
STWLC04 High-performance receiver for wearable applications
• Coil Rx – TDK WR111118-36F5-B1 • Max. Z @ 1 W: 3 mm
Embedded MCU with 16Kb ROM and 2Kb RAM
Programmable buck converter with current and voltage regulation. FSW=800 MHz
Flip Chip 3.1x4.7mm2
2Kb NVM memory for customization
Integrated high efficiency synchronous rectifier
43% total system efficiency with small coils
Fixed output voltage or direct battery charging functionality
Wearable Solution
Configurable via API for application customizationvia graphical interface for easier analysis
STWBC-WA: transmitter for wearable
Run Time Analysis GUI
Smart standbyAutomatic receiver recognition
foreign object detection for increased safety
Minimal BOM thanks to half bridge architecture
USB as power source5 V input, up to 0.5 A
Transmitter STWBC-WA
2 cm
Wearable Solution
STWBC-WA transmitter and STWLC04 receiver measurement results
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
50 70 90 110 130 150 170 190 210
eff[%
]
IOUT[mA]
Total system efficiency wearable kit 1W
VOUT=5V
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.00E+00 5.00E+06 1.00E+07 1.50E+07
Volta
ge [V
]
Cur
rent
[A]
Time [s]
Charging profile
IBAT Mean [A]IIN Mean [A]VBAT [V]
Wearable Solution
Consumer SolutionWireless charging reference design: plug and play
Plug and play solution certified with Qi and PMA standards
Energy friendly with smart standby, safe with FOD
Firmware customization available, supports different battery chemistry and direct charging
• Energy friendly: Integrated high-performance buck converter and synchronous rectifier
• Plug and play: certification with Qi (5 W) and PMA standards (7.5 W)• Safe: enables safe operation with advanced FOD• Flexible: supports different battery chemistry and direct charging
• Ubiquitous: 5 V USB powered• Plug and play: Qi 1.2 LP certified (5 W)• Smart Standby: 3 mW consumption with FOD• Flexible: customizable via GUI or software API
Consumer SolutionWireless charging reference design: plug and play
STWBC: Transmitter Receiver: STWLC03
STWLC03 - Receiver
Adapts the transmitted power to actual load conditions with digital feedback to transmitter
Safe operation with foreign object detection (FOD)
Configurable 32 bit core with I2C interface for run time analysis
Ideal for a wide application spectrum
• From low to medium power applications• Supports different battery chemistry: Li-ion and Li-pol• Allows direct battery charging
Boosts power transfer with integrated high-performance buck converter and synchronous rectifier
+
High-performance receiver up to 15 W supporting both Qi and PMA standards
STWBC - TransmitterFlexible, efficient, compliant with leading standard
Ideal for
Mobile phones, wearable devices, sports gear, medical equipment,
remote controllers
+
Compliant with 5 W class of wireless power Smart standby down to 3 mW
Digital feedback with foreign objects detection (FOD) active also in stand-by for additional safety
2 firmware options: turnkey solution for quick design, APIs (application programming interfaces) for customization
Qi 1.2 LP A11 certified
Automotive Solution
Qi-certified solutions with foreign-object detection
NFC coexistence
Transmitter: STWBC-MC and ASTWBC AEC-Q100 Grade 2
ESD protections, low EMI, smart standby
Multi-coil providing a large charging area
Wireless charging is part of the convergence of smartphones and vehicles
STWBC-MC transmitter controlling flyback, half Bridge, coil selectors, Qi protocol and FOD
Automotive SolutionWireless charging is part of the convergence of smartphones and vehicles
Power rate 5 W typical on RX side
Qi 1.2.1 certification ongoing
Wirelesscharging features
Wide charging area: 3 coils support
Low EMI: fixed frequency switching
Safe: foreign object detection also during stand-by
Dynamic voltage adaptation: support variable Vin from 5V to 15V
Solution features
2 layers PCB
Turn key or customization contacting ST
Products STWBC-MC and ASTWBC with AEC-Q100 grade 2 (- 40 ÷ 105 °C) qualification ongoing
Automotive Solution
More than Qi A13:• Battery operated +5 / +15 V• Single DC-DC conversion stage• Innovative half bridge• New Qi topology• Single controller for all power stages
Wireless charging is part of the convergence of smartphones and vehicles
• Digital controllers for in-vehicle wireless charging• STWBC-MC • ASTWBC with AEC-Q100 grade 2 (- 40 ÷ 105 °C)
qualification ongoing and QFN32 5x5 with wettableflank option
• Qi certification ongoing• Turnkey solution for quick design• Customization contacting ST:
• Program memory: 32* Kbyte EEPROM • ADC with 10 bit precision• UART• I2C master fast-slow speed rate• GPIOs
Automotive Solution
STWBC-MCASTWBC
Wireless charging is part of the convergence of smartphones and vehicles
* Available size for API depends on selected FW)
Customizable end-applications
Wireless PowerSystem know-how for complete solution with TX and RX
Load
Power Pick-upUnit
Secondary Coil
Communications & Control Unit
Sensing & Control
Mobile Device
System Unit
OutputPower
Power Conversion Unit
InputPower
Communications & Control Unit
Receiver
POW
ER
TX
TransmitterMagnetic Coupling
Primary Coil
RXD
IGIT
AL
CO
MM
UN
ICAT
ION
Digital feedback from RX to TX
Foreign object detection (FOD)
Multiple Qi and PMA standards supported
STWBC - TransmitterFlexible, efficient, compliant with leading standards
Ideal for
Mobile phones, wearable devices, sports gear, medical equipment,
remote controllers Compliant with 5 W class of wireless power Smart standby down to 3 mW
Digital feedback with foreign objects detection (FOD) active also in stand-by for additional safety
2 firmware options: turnkey solution for quick design, APIs (application programming interfaces) for customization
Qi 1.2 LP A11 certified
STWLC - ReceiverApplications up to 15 W, supporting Qi and PMA standards
Adapts the transmitted power to actual load conditions with digital feedback to transmitter
Safe operation with foreign object detection (FOD)
Embedded 32 bit core for customization and superior diagnostics
Boosts power transfer with integrated high-performance buck converter and synchronous rectifier
Ideal for
low to medium power applications, different chemistry Li-Ion and LiPo,
and direct charging
Further information and full design support available at: www.st.com
Wireless PowerAvailable now!
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