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UM2301
User manual
Getting started with the Qi MP-A10 wireless charger Tx
evaluation board based on STWBC-EP
Introduction
The STEVAL-ISB044V1 wireless power transmitter evaluation board is based on the MP-A10 (CR419)
wireless power consortium (WPC) standard version 1.2.3 and supports FOD (foreign object detection).
The transmitter supports all Qi-compatible receivers (such as those in Qi- enabled mobile phones) as
well as resistive or capacitive modulation receivers.
In accordance with the Qi-MPA10 topology, the STEVAL-ISB044V1 supports a 5-13 V input voltage and
a half-bridge stage with bridge voltage/frequency control.
The evaluation board is based on the STWBC- EP controller which integrates all the functions required
to drive and monitor the transmitter, and controls the bridge voltage built in boost topology.
The STWBC-EP supports UART connectivity to a PC and, thanks to the STEVAL-ISB044V1 graphical
interface, monitors the transmitter behavior in real-time.
The STEVAL-ISB044V1 reference design provides a complete kit which includes the STWBC-EP,
firmware, layout based on cost- effective 2-layer PCB, graphical interfaces and tools.
Figure 1: STEVAL-ISB044V1 evaluation board
October 2017
DocID031141 Rev 1
1/57
www.st.com
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Summary of Contents for ST STEVAL-ISB044V1
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Page 1: Figure 1: Steval-Isb044V1 Evaluation Board
The transmitter supports all Qi-compatible receivers (such as those in Qi- enabled mobile phones) as well as resistive or capacitive modulation receivers. In accordance with the Qi-MPA10 topology, the STEVAL-ISB044V1 supports a 5-13 V input voltage and a half-bridge stage with bridge voltage/frequency control. -
Page 2: Table Of Contents
System requirements ................ 7 Package contents ................7 Hardware description and setup ............ 8 System block diagram ............... 8 STEVAL-ISB044V1 wireless transmitter board overview ....8 STWBC-EP pinout and pin description ........... 11 Download procedure ..............13 STSW-STWBCGUI software installation ......... 13 Firmware download via STSW-STWBCGUI ........ - Page 3 UM2301 Contents Board assembly and layout ............48 Power signals (BOOST, GND, LC) ..........49 EMI components ................52 STWBC-EP layout ................53 Current sensing and demodulation ..........54 References ..................55 Revision history ................56 DocID031141 Rev 1 3/57...
- Page 4 List of tables UM2301 List of tables Table 1: STEVAL-ISB044V1 electrical performance: input characteristics ..........9 Table 2: STEVAL-ISB044V1 electrical performance: system characteristics ..........9 Table 3: Connector description ......................... 10 Table 4: Test point description ........................10 Table 5: STWBC-EP pin description ......................12 Table 6: STEVAL-ISB044V1 bill of materials ...................
- Page 5 Figure 1: STEVAL-ISB044V1 evaluation board ..................1 Figure 2: STWBC-EP block diagram ......................8 Figure 3: STEVAL-ISB044V1 evaluation board: connectors, LEDs and test points ........9 Figure 4: STEVAL-ISB044V1 evaluation board: power supply selection ..........10 Figure 5: STWBC-EP pinout in MP-A10 configuration ................11 Figure 6: STSW-STWBCGUI installation file ....................
- Page 6 Figure 61: STEVAL-ISB044V1 evaluation board: bridge node routing details ......... 51 Figure 62: STEVAL-ISB044V1 evaluation board: shunt resistor routing details ........51 Figure 63: STEVAL-ISB044V1 evaluation board: EMI components (1 of 2) ..........52 Figure 64: STEVAL-ISB044V1 evaluation board: EMI components (2 of 2) ..........52 Figure 65: STWBC-EP digital controller layout ..................
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Page 7: Getting Started
UM2301 Getting started Getting started System requirements To use the STEVAL-ISB044V1 evaluation board with the graphical user interface (GUI), you need: ® ® a PC with Microsoft Windows operating system (XP or later versions) NET Framework 4 ... -
Page 8: Hardware Description And Setup
Hardware description and setup UM2301 Hardware description and setup System block diagram Figure 2: STWBC-EP block diagram STEVAL-ISB044V1 wireless transmitter board overview The STEVAL-ISB044V1 evaluation board features: STWBC-EP digital controller 15 W output power Qi MP-A10 reference design ... -
Page 9: Table 1: Steval-Isb044V1 Electrical Performance: Input Characteristics
Notes and conditions Switching frequency Decrease with load Duty cycle Duty cycle modulation Duty cycle ƞ Full load efficiency Vin= 12 V, P Out Rx = 15 W Figure 3: STEVAL-ISB044V1 evaluation board: connectors, LEDs and test points DocID031141 Rev 1 9/57... -
Page 10: Table 3: Connector Description
Hardware description and setup UM2301 Figure 4: STEVAL-ISB044V1 evaluation board: power supply selection Table 3: Connector description Connector reference Description J100 DC power jack connector J101 Power/QC USB connector link J500 SWIM connector used for the download J501 UART jack connector used for the GUI... -
Page 11: Stwbc-Ep Pinout And Pin Description
UM2301 Hardware description and setup Test point reference Signal Description TP400 SYMBOL_DETECT Symbol detector TP501 I2C_SCL STWBC I²C signal TP502 I2C_SDA STWBC I²C signal TP503 USB_DP STWBC UART Rx signal TP504 USB_DM STWBC UART Tx signal TP506 GPIO_0 STWBC GPIO signal used for LEDs TP507 Ground TP508... -
Page 12: Table 5: Stwbc-Ep Pin Description
Hardware description and setup UM2301 Table 5: STWBC-EP pin description Pin name Firmware description number type UART_RX Uart RX link on USB debug connector PWM_QFOD PWM dedicated to QFOD circuit I2C_SDA I2C_SDA I2C_SCL I2C_SCL DNBL Output driver for Low side branch Digital output for light indicators QC_IO Quick charge circuit signal... -
Page 13: Download Procedure
UART signals. Thus, to use the STSW- STWBCGUI, UART signals must be accessible. In case of board issues, ST-LINK and STVP software can be installed to erase the STWBC-EP Flash memory. STSW-STWBCGUI software installation Install the GUI by launching the STWBC_GUI_Setup.msi installation file... -
Page 14: Firmware Download Via Stsw-Stwbcgui
Download procedure UM2301 Otherwise, try another USB port. Figure 8: STSW-STWBCGUI start screen Press “OK”. The GUI is ready to run. Firmware download via STSW-STWBCGUI The following sections describe the firmware download through the UART connector via STSW-STWBCGUI. The download contains 3 files incorporated in a single cabfile. 3.2.1 Download procedure with a new chip (never been programmed) If the chip has never been programmed, the download mode is enabled by default. -
Page 15: Figure 9: Dongle Connection
UM2301 Download procedure Figure 9: Dongle connection From the GUI, select Load FW to board from the setup menu. Figure 10: Firmware download via STSW-STWBCGUI DocID031141 Rev 1 15/57... -
Page 16: Figure 11: Firmware File Selection Message
Download procedure UM2301 As prompted, select the CAB file containing the firmware to download Figure 11: Firmware file selection message Figure 12: Firmware file selection Supply the board with 12 V and keep it powered. Figure 13: Power on message When the DOS window appears, connect the transmitter board to the dongle using a micro-USB cable. -
Page 17: Firmware Upgrade Procedure (Chip Already Programmed)
UM2301 Download procedure Figure 14: USB-to-UART dongle to STEVAL-ISB044V1 connection Follow the download progress in the DOS window and power the board off when prompted. Figure 15: DOS window: download in progress 3.2.2 Firmware upgrade procedure (chip already programmed) If a chip has already been programmed with the firmware, the download mode is disabled and special command needs to be sent to STWBC-EP to enable the download mode. -
Page 18: Erasing Firmware Procedure Using Stvp
To start the firmware erasing procedure using STVP, you have to install on your PC: ST-LINK USB driver STVP programming tool (available at www.st.com) ST-LINK hardware tools You also need to configure STVP as shown below. Figure 16: STVP configuration... -
Page 19: Procedure
Procedure Power the target off. Power the target on. Connect ST-LINK circuit to the PC via USB. Connect the ST-LINK–SWIM cable to the target. Pay special attention in connecting the SWIM cable to the transmitter board correctly, as shown below. -
Page 20: Firmware Download With Command Line
> Verifying PROGRAM MEMORY area... < PROGRAM MEMORY successfully verified. Exit from the STVP program. Disconnect SWIM. Remove power supply from the STEVAL-ISB044V1 transmitter board. Retry the UART download procedure if necessary. Firmware download with command line 3.4.1 Firmware download with written chip Ensure a dedicated directory has the following files: ... -
Page 21: Firmware Download With Blank Chip
UM2301 Download procedure Starting from the STSW-STWBCGUI folder, run the stwbc_loader_not_empty.bat from the command line, specifying the COM number (e.g. COM2) and firmware filename parameters (“firmware name.cab”). Figure 22: STSW-STWBCGUI command line 3.4.2 Firmware download with blank chip If the STWBC-EP memory is erased, the procedure sequence is a bit different. Connect the UART cable to the board. -
Page 22: Figure 24: Stsw-Stwbcgui: Convert Cab To Stvp Files
Download procedure UM2301 Figure 24: STSW-STWBCGUI: convert CAB to STVP files Follow the prompt to select the appropriate cabfile. Figure 25: Selecting the CAB file to be converted Follow the prompt to provide the project file name. 22/57 DocID031141 Rev 1... -
Page 23: Firmware Download With Stvp
Firmware download with STVP Power the target off. Power the target on. Connect ST-LINK circuit to the PC via USB. Connect the ST-LINK–SWIM cable to the target. Pay special attention in connecting the SWIM cable to the transmitter board correctly, as shown in Figure 17: "STEVAL-ISB044V1 evaluation... -
Page 24: Figure 28: Stvp File Selection
Download procedure UM2301 Select STM8AF6166 as core (see Figure 18: "STVP core selection"). In STVP, open the Project menu and click Open. Select the .stp given in the zip file. Figure 28: STVP file selection Wait few seconds. The following message should appear: Loading file program.hex in PROGRAM MEMORY area... - Page 25 > Verifying PROGRAM MEMORY area... < PROGRAM MEMORY successfully verified. Exit from the STVP program. Disconnect SWIM. Remove power supply from the STEVAL-ISB044V1 transmitter board. The IAR toolchain can be installed also for firmware compilation and download. DocID031141 Rev 1 25/57...
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Page 26: Evaluation Equipment Setup
The power supply is set to 12 V/2 A for EPP mode and 5 V/2 A for BPP mode. The board is connected to the external power supply through wires. The jumper has to be set to select the jack/external power supply input. Figure 30: STEVAL-ISB044V1 evaluation board: external power supply connection 26/57 DocID031141 Rev 1... -
Page 27: Usb Charger
The USB cable between the charger and the board should be of good quality. To minimize the losses, a 20 AWG USB cable must be used. Figure 31: STEVAL-ISB044V1 evaluation board: power supply connection UART configuration The STSW-STWBCGUI is installed on the PC connected to the board via the USB-to- UART cable (connected on the board J501 USB debug connector). -
Page 28: Figure 32: Steval-Isb044V1 Evaluation Board: Uart Connection
Evaluation equipment setup UM2301 Figure 32: STEVAL-ISB044V1 evaluation board: UART connection 28/57 DocID031141 Rev 1... -
Page 29: Gui And Evaluation Procedure
UM2301 GUI and evaluation procedure GUI and evaluation procedure The STSW-STWBCGUI thoroughly monitors STWBC-EP operations. The main screen provides transmitter and Qi receiver status information. Figure 33: STSW-STWBCGUI: object detected and charge in progress The STSW-STWBCGUI can also display the Rx to Tx communication protocol errors, useful for system debugging. -
Page 30: Figure 34: Stsw-Stwbcgui: Qi Protocol Window
GUI and evaluation procedure UM2301 Figure 34: STSW-STWBCGUI: Qi protocol window You can also monitor STWBC-EP internal variables such as bridge voltage and frequency, Rx reported power, coil temperature, etc. Figure 35: STSW-STWBCGUI: Qi monitor window The GUI user-friendly interface allows efficient system adjustment (thresholds, regulation error) and lets you store parameters to and load parameters from your computer. -
Page 31: Figure 36: Stsw-Stwbcgui: Parameters Window
UM2301 GUI and evaluation procedure Level 1: more critical parameters to be modified with caution. You must click the Unlock param button before modifying it, with caution, as it can lead to system malfunction or trigger unexpected behavior incompatible with Qi standard. Figure 36: STSW-STWBCGUI: Parameters window Parameters can be modified and their effect can be tested immediately by clicking Push to target;... -
Page 32: Figure 38: Stsw-Stwbcgui: Saving Modified Parameters (Dump To Bin)
GUI and evaluation procedure UM2301 Through the GUI, you can change the parameters and produce a new cab to program a batch of new boards. To this aim, dump the parameters into a bin file, but only after clicking the Push to target button. Figure 38: STSW-STWBCGUI: saving modified parameters (Dump to bin) Figure 39: STSW-STWBCGUI: bin file backup You can then select Modify parameters in CAB file from the setup menu and select the... -
Page 33: Status Leds
UM2301 GUI and evaluation procedure Figure 40: STSW-STWBCGUI: CAB file patch button Status LEDs The status LEDs give the state of the charge: At startup Red short blinking: when the board auto-calibration is on-going. The user has to wait for the LED to be switched off before putting a receiver on the surface. -
Page 34: Presence Detection Calibration Procedure
GUI and evaluation procedure UM2301 Figure 41: STSW-STWBCGUI: start auto-calibration This calibration should be done only once after each new firmware download, with NO Receiver placed on the transmitter. You must first calibrate the presence detection and then the QFOD. 5.2.1 Presence detection calibration procedure Set the test number to 1... -
Page 35: Qfod Calibration Procedure
UM2301 GUI and evaluation procedure At the end of the test, in the protocol window, the AUTOCAL_TEST_DONE is set and in Test Done the test window the status is Figure 43: STSW-STWBCGUI: test result Start the test again if the returned status is different. 5.2.2 QFOD calibration procedure Set the test number to 2... -
Page 36: Efficiency
Efficiency Efficiency measurements are performed on a Qi certification tester. The STEVAL-ISB044V1 transmitter is supplied by 12 V/2 A and the receiver voltage level is 12 V (MP1B). is the output power actually measured at the receiver output (not only at the rectifier output) and P is the input power. -
Page 37: Stand-By Consumption
In this mode, device detection is still ensured; power consumption is reduced down to 1.4 mA average. The STEVAL-ISB044V1 evaluation board has a low stand-by power of only 17 mW. To measure this low power consumption, the UART cable must be unplugged. -
Page 38: Schematic Diagram
Schematic diagram UM2301 Schematic diagram Figure 48: STEVAL-ISB044V1 circuit schematic (1 of 8) 38/57 DocID031141 Rev 1... -
Page 39: Figure 49: Steval-Isb044V1 Circuit Schematic (2 Of 8)
UM2301 Schematic diagram Figure 49: STEVAL-ISB044V1 circuit schematic (2 of 8) DocID031141 Rev 1 39/57... -
Page 40: Figure 50: Steval-Isb044V1 Circuit Schematic (3 Of 8)
Schematic diagram UM2301 Figure 50: STEVAL-ISB044V1 circuit schematic (3 of 8) 40/57 DocID031141 Rev 1... -
Page 41: Figure 51: Steval-Isb044V1 Circuit Schematic (4 Of 8)
UM2301 Schematic diagram Figure 51: STEVAL-ISB044V1 circuit schematic (4 of 8) R400 C406 POWER_NODE 4.7NF 470R R411 D400 C400 10NF R401 C401 22NF R402 VDD_STWBC 150K R404 R403 470K 470K R405 C402 100PF R406 100K R407 R408 C403 C404 22PF... -
Page 42: Figure 52: Steval-Isb044V1 Circuit Schematic (5 Of 8)
Schematic diagram UM2301 Figure 52: STEVAL-ISB044V1 circuit schematic (5 of 8) 42/57 DocID031141 Rev 1... -
Page 43: Figure 53: Steval-Isb044V1 Circuit Schematic (6 Of 8)
UM2301 Schematic diagram Figure 53: STEVAL-ISB044V1 circuit schematic (6 of 8) M600 M602 M603 M601 M320 KRSTMCZ100- M320 KRSTMCZ100- M320 KRSTMCZ100- M320 KRSTMCZ100- M607 M619 M604 M606 M605 WExxx_2xx M620 SPACER_3MM_MP_A6-A2 D01475 D01475 D01475 D01475 M624 M621 M622 M623 HOLE_3.2MM_6 HOLE_3.2MM_6... -
Page 44: Figure 55: Steval-Isb044V1 Circuit Schematic (8 Of 8)
Schematic diagram UM2301 Figure 55: STEVAL-ISB044V1 circuit schematic (8 of 8) 44/57 DocID031141 Rev 1... -
Page 45: Bill Of Materials
UM2301 Bill of materials Bill of materials Table 6: STEVAL-ISB044V1 bill of materials Item Ref. Part/Value Description Manufacturer Order code C100, Ceramic NP, 0603 C_NP_0603 C114 capacitors C101, 10 µF, 25 V, Ceramic Wurth 885012108021 C103 1206, ±20% capacitors Elektronik... - Page 46 Bill of materials UM2301 Ref. Part/Value Description Manufacturer Order code Item 10 PF, 50 V, Ceramic C213 10PF_50V_X7R_0402 0402, ±15% capacitor C214,C21 220 NF, 35 V, Ceramic 220NF_35V_X7R_0603 0603, ±15% capacitors 470pF, Ceramic C216 470pF_50V_COG_402 50V,15% capacitor C300, C301, 47 NF, 100 V, Ceramic C3216C0G2A473J115AC C302,...
- Page 47 UM2301 Bill of materials Ref. Part/Value Description Manufacturer Order code Item 2.2 NF, 50 V, Ceramic C514 2.2NF_50V_X7R_0402 0402, ±15% capacitor C801, 100 NF, 50 V, Ceramic C803, 100NF_50V_X7R_0603 0603, ±15% capacitors C807 10 NF, 50 V, Ceramic C802 10NF_50V_X7R_0603 0603, ±15% capacitor C804,...
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Page 48: Board Assembly And Layout
Board assembly and layout UM2301 Board assembly and layout The STEVAL-ISB044V1 evaluation board is designed using a low cost 2-layers PCB with all the components on the top side. The test points allow the user to evaluate the STWBC-EP solution with probes. -
Page 49: Power Signals (Boost, Gnd, Lc)
UM2301 Board assembly and layout Power signals (BOOST, GND, LC) Figure 57: STEVAL-ISB044V1 evaluation board: power signal routing Layer 1: large GND tracks with lot of vias for high power circuits Layer 1: Large tracks for high current circuits (booster, half... -
Page 50: Figure 59: Steval-Isb044V1 Evaluation Board: Dc-Dc Boost Routing Details
Board assembly and layout UM2301 Figure 59: STEVAL-ISB044V1 evaluation board: DC-DC boost routing details Net VIN C217 22 µF L200 4.7 µH Net L200 D201-QQ203 TP200 R200 R214 C216 VDCDC Q203 470pF N-MOS Net D201-C205 STL10N3LLH5 D201 C200 C205 C207... -
Page 51: Figure 61: Steval-Isb044V1 Evaluation Board: Bridge Node Routing Details
UM2301 Board assembly and layout Figure 61: STEVAL-ISB044V1 evaluation board: bridge node routing details VDCDC Net VDCDC-Q303 M300 VDCDC Q302 PWM_QFOD 12 µH Q303 N-MOS D300 STL10N3LLH5 4148WS Q304 C310 R309 C300 47NF N-MOS 1.5NF TP304 STL10N3LLH5 TP305 WIRE_SOLDER WIRE_SOLDER... -
Page 52: Emi Components
Board assembly and layout UM2301 EMI components Figure 63: STEVAL-ISB044V1 evaluation board: EMI components (1 of 2) R214 and C216 TP200 very close to D201 C202 and C206 R214 C216 near C205 VDCDC VDCDC 470pF and C205 GND D201 C205... -
Page 53: Stwbc-Ep Layout
UM2301 Board assembly and layout STWBC-EP layout Figure 65: STWBC-EP digital controller layout L501 C501-L501 near VDDA (pin13) C501 100NF DEMAGNET SYMBOL_DETECT C103 C503 L502 C112 C502 L501 C100 R505 C503-C502-L502 C501 near VDD (pin29) STWBC-EP L502 Digital controller R505 near Reset (pin 28) C502 100NF... -
Page 54: Current Sensing And Demodulation
Board assembly and layout UM2301 Current sensing and demodulation Figure 66: STEVAL-ISB044V1 evaluation board: current sensing VDD_STWBC R302 R303 TP301 100K IDEMOD R304 ISENSE 470K VRSENSE R306 C307 R305 470K 22NF 470K R307 C308 0.022R 470PF Direct GND line connection... -
Page 55: References
References References Freely available on www.st.com: STWBC-EP datasheet STEVAL-ISB044V1 data brief (DB3408): "Qi MP-A10 15 W wireless charger TX evaluation kit based on STWBC-EP" STSW-ISB044FW data brief (DB3409): "Firmware for the STEVAL-ISB044V1 wireless power transmitter evaluation board based on STBWC-EP"... -
Page 56: Revision History
Revision history UM2301 Revision history Table 7: Document revision history Date Version Changes 30-Oct-2017 Initial release. 56/57 DocID031141 Rev 1... - Page 57 ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
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