ST Enables The Wireless Charging World Wearable Consumer Automotive Wearable Solution Wireless charging reference design – 1 Watt wireless delivery 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 Wearable Solution Wireless charging reference design – 1 Watt wireless delivery Transmitter STWBC-WA Receiver: STWLC04 1 cm 2 cm • • • • 5 V USB powered Active presence detection Stand-by FOD Firmware customization with API • • • • Li-Ion direct charging supported Support for 5 V regulated voltage Space saving solution with optimized BOM Up to 3 mm Z Wearable Solution STWLC04 High-performance receiver for wearable applications Programmable buck converter with current and voltage regulation. FSW=800 MHz Integrated high efficiency synchronous rectifier Embedded MCU with 16Kb ROM and 2Kb RAM 2Kb NVM memory for customization 43% total system efficiency with small coils • Coil Rx – TDK WR111118-36F5-B1 • Max. Z @ 1 W: 3 mm Fixed output voltage or direct battery charging functionality Flip Chip 3.1x4.7mm2 Wearable Solution STWBC-WA: transmitter for wearable Transmitter STWBC-WA USB as power source 5 V input, up to 0.5 A Smart standby Automatic receiver recognition foreign object detection for increased safety 2 cm Minimal BOM thanks to half bridge architecture Configurable via API for application customization via graphical interface for easier analysis Run Time Analysis GUI Wearable Solution STWBC-WA transmitter and STWLC04 receiver measurement results Charging profile 0.5 5 0.45 0.4 0.4 0.35 0.35 0.3 0.3 Current [A] eff[%] 0.45 0.25 0.2 0.1 0.1 0.05 0 0.00E+00 0 50 70 90 110 130 150 IOUT[mA] 170 190 210 3.5 3 2.5 0.2 0.15 VOUT=5V 4 0.25 0.15 0.05 4.5 2 1.5 1 IBAT Mean [A] IIN Mean [A] VBAT [V] 5.00E+06 0.5 1.00E+07 Time [s] 0 1.50E+07 Voltage [V] Total system efficiency wearable kit 1W 0.5 Consumer Solution Wireless 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 Consumer Solution Wireless charging reference design: plug and play STWBC: Transmitter • • • • 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 Receiver: STWLC03 • • • • 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 STWLC03 - Receiver High-performance receiver up to 15 W supporting both Qi and PMA standards Boosts power transfer with integrated high-performance buck converter and synchronous rectifier Adapts the transmitted power to actual load conditions with digital feedback to transmitter Ideal for a wide application spectrum Safe operation with foreign object detection (FOD) • From low to medium power applications • Supports different battery chemistry: Li-ion and Li-pol • Allows direct battery charging Configurable 32 bit core with I2C interface for run time analysis + STWBC - Transmitter Flexible, efficient, compliant with leading standard Ideal for Mobile phones, wearable devices, sports gear, medical equipment, remote controllers Qi 1.2 LP A11 certified 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 + Automotive Solution Wireless charging is part of the convergence of smartphones and vehicles Multi-coil providing a large charging area Qi-certified solutions with foreign-object detection ESD protections, low EMI, smart standby NFC coexistence Transmitter: STWBC-MC and ASTWBC AECQ100 Grade 2 Automotive Solution Wireless charging is part of the convergence of smartphones and vehicles STWBC-MC transmitter controlling flyback, half Bridge, coil selectors, Qi protocol and FOD Power rate 5 W typical on RX side Qi 1.2.1 certification ongoing Wireless charging 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 Wireless charging is part of the convergence of smartphones and vehicles 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 Automotive Solution Wireless charging is part of the convergence of smartphones and vehicles • STWBC-MC ASTWBC Digital controllers for in-vehicle wireless charging • STWBC-MC • ASTWBC with AEC-Q100 grade 2 (- 40 ÷ 105 °C) qualification ongoing and QFN32 5x5 with wettable flank 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 * Available size for API depends on selected FW) Wireless Power System know-how for complete solution with TX and RX Mobile Device Sensing & Control Load RX Multiple Qi and PMA standards supported DIGITAL COMMUNICATION POWER Output Power Communications & Control Unit Power Pick-up Unit Secondary Coil Receiver Magnetic Coupling Transmitter Primary Coil Power Conversion Unit Digital feedback from RX to TX Foreign object detection (FOD) Communications & Control Unit Input Power System Unit TX Customizable end-applications STWBC - Transmitter Flexible, efficient, compliant with leading standards Ideal for Mobile phones, wearable devices, sports gear, medical equipment, remote controllers Qi 1.2 LP A11 certified 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 STWLC - Receiver Applications up to 15 W, supporting Qi and PMA standards Boosts power transfer with integrated highperformance buck converter and synchronous rectifier Adapts the transmitted power to actual load conditions with digital feedback to transmitter Safe operation with foreign object detection (FOD) Ideal for low to medium power applications, different chemistry Li-Ion and LiPo, and direct charging Embedded 32 bit core for customization and superior diagnostics Wireless Power Available now! Further information and full design support available at: www.st.com