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UM2289
User manual
Getting started with the dual mode wireless power evaluation board for Qi and Air-
fuel inductive receiver and Qi-based transmitter with STWLC33
Introduction
The
STEVAL-ISB042V1
is a 15-watt Qi and 5-watt Airfuel inductive (former PMA) wireless power receiver evaluation board
based on the
STWLC33
wireless power receiver solution for the WPC/Airfuel mobile device with dual mode coil.
The board lets you evaluate the STWLC33 capabilities as a Qi/Airfuel inductive receiver as well as its ability to power another Qi
receiver.
The solution is certified in accordance with the extended power profile Qi v1.2 and Airfuel SR1 standard.
The STWLC33 IC is powered by a dual mode Rx coil attached to a 1.5 mm thick plastic fixture.
The STWLC firmware offers users the flexibility to modify parameters and settings to ensure proper integration of the STWLC33
device with the final application.
The layout is based on a cost-effective 4-layer PCB.
Figure 1.
STEVAL-ISB042V1 evaluation board
UM2289 - Rev 2 - December 2017
www.st.com/
For further information contact your local STMicroelectronics sales office.
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Summary of Contents for ST STEVAL-ISB042V1
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Page 1: Figure 1. Steval-Isb042V1 Evaluation Board
The STWLC firmware offers users the flexibility to modify parameters and settings to ensure proper integration of the STWLC33 device with the final application. The layout is based on a cost-effective 4-layer PCB. Figure 1. STEVAL-ISB042V1 evaluation board UM2289 - Rev 2 - December 2017 www.st.com/ For further information contact your local STMicroelectronics sales office. -
Page 2: Getting Started
EN – enable input (active low), pull on-board R4 down Receiver mode The easiest way to test the STEVAL-ISB042V1 evaluation board in receiver mode is to connect the load to J2 header or, optionally, to J1 USB connector and place it on the transmitter surface. -
Page 3: Transmitter Mode
UM2289 Transmitter mode Figure 2. STEVAL-ISB042V1 evaluation board: receiver mode D6 indication LED lights up when the receiver enters the Power Transfer phase. Transmitter mode To test the board in Tx mode, you must provide a 5 V power supply to the J2 header (ensure STWLC33 is not operating in Rx mode power transfer) and switch STWLC33 to Tx mode over I²C interface (J8 header). -
Page 4: Figure 3. Steval-Isb042V1 Evaluation Board: Transmitter Mode
UM2289 Transmitter mode Figure 3. STEVAL-ISB042V1 evaluation board: transmitter mode Step 2. Use the PC GUI application. Step 3. Connect the I²C bridge. Step 4. Switch to TX mode tab. Step 5. Click Load binary image button. Step 6. Select the GUI STWLC33_TxMode_RAM_binary.bin file. -
Page 5: Stwlc33 Nvm Configuration
NVM configuration is the same default configuration as in STWLC33 samples (see STWLC33 da- tasheet). 1.4.1 Board overview The STEVAL-ISB042V1 evaluation board default configuration has good performance. The board features: • STWLC33 evaluation board with Würth Elektronik dual mode coil (760308102207) •... -
Page 6: Figure 6. Gui Rx Mode: Interrupt Registers Sub-Tab
UM2289 GUI: I²C register access Figure 6. GUI Rx mode: Interrupt registers sub-tab The Setup and measurement registers sub-tab controls registers and measurement values. VOUT_set or ILIM_set modifications are immediate. The default values are loaded automatically from NVM after wireless operating standard detection. Important: Refer to 2 Configuration guidelines... -
Page 7: Tx Mode Registers
UM2289 GUI: I²C register access Figure 7. GUI Rx mode: Setup and measurement registers sub-tab The Qi – Proprietary packets sub-tab allows sending any Qi packet and (in Qi 1.2 only) receive the response from the transmitter (both pattern type or data type responses are supported). Figure 8. -
Page 8: Gui: Nvm Configuration Access
Tx frequency setup allows modifying the regulation control algorithm minimum and maximum frequency and the starting ping frequency. Note: The optimal ping frequency for the STEVAL-ISB042V1 evaluation board is approximately 130 kHz. ASK demodulation thresholds parameter defines the ASK receiver sensitivity. Figure 9. -
Page 9: Pma Nvm Configuration
UM2289 GUI: NVM configuration access Figure 10. GUI: Qi configuration tab 1.6.2 PMA NVM configuration The PMA configuration tab contains the RXID identifier sent over the PMA protocol. The tab contains also default values for the VOUT voltage, Input current limit and Interrupt enable registers. The PMA specification requires that the receiver automatically terminates the power transfer if the load is below a certain threshold for a certain period of time. -
Page 10: Generic Load/Save Nvm Access
UM2289 GUI: NVM configuration access In Tx mode, all the pins are inputs with no function. In the STEVAL-ISB042V1 evaluation board, the LED diode (D6) is controlled by GPIO2 pin. Figure 12. GUI: platform configuration tab 1.6.4 Generic load/save NVM access The NVM tab allows the backup of the current NVM configuration into a file or loading a new one from a file. -
Page 11: Configuration Guidelines
The right VOUT voltage for the STEVAL-ISB042V1 evaluation board is roughly 4 to 5.5 V with 5 W transmitters and 8 to 10 V with 15 W transmitters. -
Page 12: Performance Charts
The output voltage regulation is maintained under the threshold of a 1% difference from no load to full load. Figure 15. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in BPP Extended power profile (EPP) Rx mode performance STEVAL-ISB042V1 evaluation board performance in EPP has been evaluated through a Qi 1.2 EPP certified... -
Page 13: Tx Mode Performance
The output voltage regulation is maintained under the threshold of a 0.15% difference from no load to 10 W load and 1.5% from no load to full load. Figure 17. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in EPP 10.0 Rx Output power (W) -
Page 14: Figure 18. Steval-Isb042V1 Evaluation Board Performance: Efficiency Vs Output Power In Tx Mode
UM2289 TX mode performance Figure 18. STEVAL-ISB042V1 evaluation board performance: efficiency vs output power in TX mode 0.500 1.000 1.500 2.000 2.500 3.000 Rx Output Power (W) UM2289 - Rev 2 page 14/26... -
Page 15: Schematic Diagrams
UM2289 Schematic diagrams Schematic diagrams Figure 19. STEVAL-ISB042V1 circuit schematic UM2289 - Rev 2 page 15/26... -
Page 16: Bill Of Materials
UM2289 Bill of materials Bill of materials Table 1. STEVAL-ISB042V1 bill of materials Item Q.ty Ref. Part / Value Description Manufacturer Order code CSP 6x9, 400 μm Wireless power STWLC33 pitch receiver 100 nF/50 V, SMD Capacitors Murata GRM155R61H104KE19 0402 3.9 nF/50 V, SMD... - Page 17 UM2289 Bill of materials Item Q.ty Ref. Part / Value Description Manufacturer Order code 1.5 nF/50 V SMD Capacitor Murata GRM155R71H152KA01 FLT1 0402 22 nF/50 V SMD Capacitor Murata GRM155R71H223KA12 FLT2 0402 6.8 nF/50 V SMD Capacitor Murata GRM155R71H682KA88 FLT3 0402 30 kΩ...
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Page 18: Board Layout
UM2289 Board layout Board layout Figure 20. STEVAL-ISB042V1: top silkscreen and pads Figure 21. STEVAL-ISB042V1: copper layer 1 UM2289 - Rev 2 page 18/26... -
Page 19: Figure 22. Steval-Isb042V1: Copper Layer 2
UM2289 Board layout Figure 22. STEVAL-ISB042V1: copper layer 2 Figure 23. STEVAL-ISB042V1: copper layer 3 UM2289 - Rev 2 page 19/26... -
Page 20: Figure 24. Steval-Isb042V1: Copper Layer 4
UM2289 Board layout Figure 24. STEVAL-ISB042V1: copper layer 4 UM2289 - Rev 2 page 20/26... -
Page 21: References
UM2289 References References Freely available on www.st.com: STWLC33 datasheet. UM2289 - Rev 2 page 21/26... -
Page 22: Revision History
UM2289 Revision history Table 2. Document revision history Date Version Changes 02-Oct-2017 Initial release. 22-Dec-2017 Updated Table 1. STEVAL-ISB042V1 bill of materials. Added references to the STEVAL-ISB043V1 wearable receiver. UM2289 - Rev 2 page 22/26... -
Page 23: Table Of Contents
UM2289 Contents Contents Getting started..............2 Board configuration and test points . - Page 24 STEVAL-ISB042V1 bill of materials ........
- Page 25 STEVAL-ISB042V1 evaluation board: transmitter mode ........
- Page 26 ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’...
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