Getting started with the Qi MP-A10 wireless charger Tx evaluation board based on STWBC-EP

Transcription

1 UM0 User manual Getting started with the Qi MP-A0 wireless charger Tx evaluation board based on STWBC-EP Introduction The STEVAL-ISB044V wireless power transmitter evaluation board is based on the MP-A0 (CR49) wireless power consortium (WPC) standard version.. 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-MPA0 topology, the STEVAL-ISB044V supports a 5- 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-ISB044V graphical interface, monitors the transmitter behavior in real-time. The STEVAL-ISB044V reference design provides a complete kit which includes the STWBC-EP, firmware, layout based on cost- effective -layer PCB, graphical interfaces and tools. Figure : STEVAL-ISB044V evaluation board October 07 DocID04 Rev /57

2 Contents UM0 Contents Getting started System requirements Package contents... 7 Hardware description and setup System block diagram STEVAL-ISB044V wireless transmitter board overview STWBC-EP pinout and pin description... Download procedure.... STSW-STWBCGUI software installation.... Firmware download via STSW-STWBCGUI Download procedure with a new chip (never been programmed) Firmware upgrade procedure (chip already programmed) Erasing firmware procedure using STVP Requirements Procedure Firmware download with command line Firmware download with written chip Firmware download with blank chip....5 STVP file creation....6 Firmware download with STVP... 4 Evaluation equipment setup External power supply USB charger UART configuration GUI and evaluation procedure Status LEDs Test procedure for board calibration Presence detection calibration procedure QFOD calibration procedure Efficiency Stand-by consumption Schematic diagram Bill of materials /57 DocID04 Rev

3 UM0 Contents 8 Board assembly and layout Power signals (BOOST, GND, LC) EMI components STWBC-EP layout Current sensing and demodulation References Revision history DocID04 Rev /57

4 List of tables UM0 List of tables Table : STEVAL-ISB044V electrical performance: input characteristics... 9 Table : STEVAL-ISB044V electrical performance: system characteristics... 9 Table : Connector description... 0 Table 4: Test point description... 0 Table 5: STWBC-EP pin description... Table 6: STEVAL-ISB044V bill of materials Table 7: Document revision history /57 DocID04 Rev

5 UM0 List of figures List of figures Figure : STEVAL-ISB044V evaluation board... Figure : STWBC-EP block diagram... 8 Figure : STEVAL-ISB044V evaluation board: connectors, LEDs and test points... 9 Figure 4: STEVAL-ISB044V evaluation board: power supply selection... 0 Figure 5: STWBC-EP pinout in MP-A0 configuration... Figure 6: STSW-STWBCGUI installation file... Figure 7: Windows Device Manager: COM port selection... Figure 8: STSW-STWBCGUI start screen... 4 Figure 9: Dongle connection... 5 Figure 0: Firmware download via STSW-STWBCGUI... 5 Figure : Firmware file selection message... 6 Figure : Firmware file selection... 6 Figure : Power on message... 6 Figure 4: USB-to-UART dongle to STEVAL-ISB044V connection... 7 Figure 5: DOS window: download in progress... 7 Figure 6: STVP configuration... 8 Figure 7: STEVAL-ISB044V evaluation board: ST-LINK connection... 9 Figure 8: STVP core selection... 9 Figure 9: STVP download... 0 Figure 0: STVP wrong device selected alert... 0 Figure : STVP incompatibility device action query... 0 Figure : STSW-STWBCGUI command line... Figure : STSW-STWBCGUI command line with blank chip... Figure 4: STSW-STWBCGUI: convert CAB to STVP files... Figure 5: Selecting the CAB file to be converted... Figure 6: STVP project file name... Figure 7: STVP files created... Figure 8: STVP file selection... 4 Figure 9: STEVAL-ISB044V evaluation board: test setup configuration... 6 Figure 0: STEVAL-ISB044V evaluation board: external power supply connection... 6 Figure : STEVAL-ISB044V evaluation board: external power supply connection... 7 Figure : STEVAL-ISB044V evaluation board: UART connection... 8 Figure : STSW-STWBCGUI: object detected and charge in progress... 9 Figure 4: STSW-STWBCGUI: Qi protocol window... 0 Figure 5: STSW-STWBCGUI: Qi monitor window... 0 Figure 6: STSW-STWBCGUI: Parameters window... Figure 7: STSW-STWBCGUI: modified parameters... Figure 8: STSW-STWBCGUI: saving modified parameters (Dump to bin)... Figure 9: STSW-STWBCGUI: bin file backup... Figure 40: STSW-STWBCGUI: CAB file patch button... Figure 4: STSW-STWBCGUI: start auto-calibration... 4 Figure 4: STSW-STWBCGUI: presence detection test... 4 Figure 4: STSW-STWBCGUI: test result... 5 Figure 44: STSW-STWBCGUI: QFOD test... 5 Figure 45: STSW-STWBCGUI: QFOD test result... 6 Figure 46: Efficiency setup... 6 Figure 47: STEVAL-ISB044V evaluation board: efficiency performance with MPB Rx... 7 Figure 48: STEVAL-ISB044V circuit schematic ( of 8)... 8 Figure 49: STEVAL-ISB044V circuit schematic ( of 8)... 9 Figure 50: STEVAL-ISB044V circuit schematic ( of 8) Figure 5: STEVAL-ISB044V circuit schematic (4 of 8)... 4 Figure 5: STEVAL-ISB044V circuit schematic (5 of 8)... 4 Figure 5: STEVAL-ISB044V circuit schematic (6 of 8)... 4 DocID04 Rev 5/57

6 List of figures UM0 Figure 54: STEVAL-ISB044V circuit schematic (7 of 8)... 4 Figure 55: STEVAL-ISB044V circuit schematic (8 of 8) Figure 56: STEVAL-ISB044V evaluation board: functional block assembly Figure 57: STEVAL-ISB044V evaluation board: power signal routing Figure 58: STEVAL-ISB044V evaluation board: ground plan Figure 59: STEVAL-ISB044V evaluation board: DC-DC boost routing details Figure 60: STEVAL-ISB044V evaluation board: power GND routing details Figure 6: STEVAL-ISB044V evaluation board: bridge node routing details... 5 Figure 6: STEVAL-ISB044V evaluation board: shunt resistor routing details... 5 Figure 6: STEVAL-ISB044V evaluation board: EMI components ( of )... 5 Figure 64: STEVAL-ISB044V evaluation board: EMI components ( of )... 5 Figure 65: STWBC-EP digital controller layout... 5 Figure 66: STEVAL-ISB044V evaluation board: current sensing Figure 67: STEVAL-ISB044V evaluation board: current demodulation /57 DocID04 Rev

7 UM0 Getting started Getting started. System requirements To use the STEVAL-ISB044V evaluation board with the graphical user interface (GUI), you need: a PC with Microsoft Windows operating system (XP or later versions) NET Framework 4 a USB-to-UART cable to connect the board to the PC.. Package contents Hardware: a STEVAL-ISB044V evaluation board ST-LINK/V in-circuit debugger/programmer with single wire interface module (SWIM), available for download on a USB-to-UART interface dongle with a micro-usb cable for board debug and GUI use Software: ST-LINK USB driver STVP programming software (integrated in ST_toolset available on FTDI VCP driver ( PC GUI installation package DocID04 Rev 7/57

8 Hardware description and setup UM0 Hardware description and setup. System block diagram Figure : STWBC-EP block diagram. STEVAL-ISB044V wireless transmitter board overview The STEVAL-ISB044V evaluation board features: STWBC-EP digital controller 5 W output power Qi MP-A0 reference design WPC Qi.. standard compliant Robust demodulation algorithm, with triple path (V, I, f) Foreign object detection (FOD) Accurate power control Active presence detection UART protocol to control and monitor the system Complete reference design (evaluation board, IC, firmware and tools) -layer PCB for easy design Flash memory-based RoHS compliant 8/57 DocID04 Rev

9 UM0 Parameter Hardware description and setup Table : STEVAL-ISB044V electrical performance: input characteristics Input characteristics Min. Typ. Max. Unit Notes and conditions Vin Input voltage 5 V Iin Input current.6 A Vin nominal, Iout = max. on MPB Rx Input no-load current Input stand-by current ma.4 ma At typical voltage Table : STEVAL-ISB044V electrical performance: system characteristics Parameter Input characteristics Min. Typ. Max. Unit Notes and conditions Fs Switching frequency 0 80 khz Decrease with load Duty cycle Duty cycle modulation 5 50 % Duty cycle ƞ Full load efficiency 80 % Vin= V, P Out Rx = 5 W Figure : STEVAL-ISB044V evaluation board: connectors, LEDs and test points DocID04 Rev 9/57

10 Hardware description and setup Figure 4: STEVAL-ISB044V evaluation board: power supply selection UM0 Connector reference J00 J0 J500 J50 J700 Table : Connector description Description DC power jack connector Power/QC USB connector link SWIM connector used for the download UART jack connector used for the GUI Quick charge USB connector Table 4: Test point description Test point reference Signal Description TP00 V V power supply connection TP0 GND GND power connection TP0 VIN Input voltage TP0 VDD_STWBC 4.5V LDO output voltage TP00 VDCDC Boost output voltage TP0 ISENSE Current measurement TP0 GND Power GND connection (Rsense) TP0 VRSENSE Rsense resistor voltage TP04 TP05 Wireless charging coil connection Wireless charging coil connection 0/57 DocID04 Rev

11 UM0 Hardware description and setup Test point reference Signal Description TP400 SYMBOL_DETECT Symbol detector TP50 IC_SCL STWBC I²C signal TP50 IC_SDA STWBC I²C signal TP50 USB_DP STWBC UART Rx signal TP504 USB_DM STWBC UART Tx signal TP506 GPIO_0 STWBC GPIO signal used for LEDs TP507 GND Ground TP508 CURRENT_DEMOD Symbol detector TP509 QC_IO Quick charge circuit signal TP50 GND Ground TP5 GND Ground. STWBC-EP pinout and pin description The STWBC-EP is a multifunction device that can support several wireless charging architectures. This section shows the STWBC-EP pinout when the MP-A0 configuration is used. Figure 5: STWBC-EP pinout in MP-A0 configuration DocID04 Rev /57

12 Hardware description and setup Pin number Pin name Table 5: STWBC-EP pin description Pin type Firmware description UART_RX DI Uart RX link on USB debug connector PWM_QFOD DO PWM dedicated to QFOD circuit IC_SDA IC_SDA 4 IC_SCL IC_SCL 5 DNBL DO Output driver for Low side branch 6 LED DO Digital output for light indicators 7 QC_IO DO Quick charge circuit signal 8 CMP_OUT_V AI Boost output voltage sensing 9 CS_CMP AI Boost current sensing 0 DCDC_DAC_REF AI DAC reference value for Boost output voltage WAVE_SNS AI Symbol detector based on delta frequency CURRENT_DEMOD AI Current demodulation VDDA PS Analog power supply 4 VSSA PS Analog ground UM0 5 TANK_VOLTAGE AI Analog input to measure the LC voltage (power calculation) 6 VTARGET AI Boost voltage measurement 7 QFOD_ADC AI 8 COIL_TEMP AI 9 ISENSE AI High sensitivity peak voltage detector used for Quality Factor measurement Analog input for temperature measurement. The input is connected to external NTC biased to VDD_STWBC Analog input to measure the current flowing into the power bridge 0 VMAIN AI Analog input to measure the main power supply DCDC_DRV DO DCDC boost PWM drive DEMAGNET DI Boost demagnetization SYMBOL_DETECT DI Voltage demodulation 4 DCDC_DAC DO Boost PWM output DAC (setting the CPP comparator voltage reference) 5 UPBL DO Output driver for high side branch 6 DNBL_FB Used for hardware PWM programmation 7 SWIM DIO Digital IO for debug interface 8 NRST DI Reset 9 VDD PS Digital and I/O power supply 0 VSS PS Digital and I/O ground VOUT Supply Internal LDO output UART_TX DO Uart TX link on USB debug connector AlI analog inputs are VDD compliant but can be used only between 0 and. V. /57 DocID04 Rev

13 UM0 Download procedure Download procedure To download the firmware to the board, the user has to install the GUI software which allows a complete board monitoring via 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 Figure 6: STSW-STWBCGUI installation file Connect the wireless power transmitter board to the PC via the USB-to-UART connection on J50 UART connector Check Windows Device Manager to identify the correct port number and select the appropriate USB serial COM port Figure 7: Windows Device Manager: COM port selection 4 Enter a specific COM port number (if not listed in the selection window) in the Special text box (e.g., COM or the specific syntax \\.\COM ) If the GUI is switched off, ensure that the COM port is not used on your computer. DocID04 Rev /57

14 Download procedure Otherwise, try another USB port. Figure 8: STSW-STWBCGUI start screen UM0 5 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 files incorporated in a single cabfile... Download procedure with a new chip (never been programmed) If the chip has never been programmed, the download mode is enabled by default. Connect the USB-to-UART dongle to the computer. Do not connect the transmitter board for the moment. 4/57 DocID04 Rev

15 UM0 Figure 9: Dongle connection Download procedure From the GUI, select Load FW to board from the setup menu. Figure 0: Firmware download via STSW-STWBCGUI DocID04 Rev 5/57

16 Download procedure UM0 As prompted, select the CAB file containing the firmware to download Figure : Firmware file selection message Figure : Firmware file selection 4 Supply the board with V and keep it powered. Figure : Power on message 5 When the DOS window appears, connect the transmitter board to the dongle using a micro-usb cable. Take care to connect it to the USB debug connector J50 on the opposite side of the power supply connection. 6/57 DocID04 Rev

17 UM0 Download procedure Figure 4: USB-to-UART dongle to STEVAL-ISB044V connection 6 Follow the download progress in the DOS window and power the board off when prompted. Figure 5: DOS window: download in progress.. 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. Supply the transmitter board via a power supply set to V. Connect the USB-to-UART dongle to the transmitter board. The STWBC-EP UART Rx/Tx signals are accessible on the transmitter board J50 connector, respectively on USB_DP and USB_DM (see Figure 4: "USB-to-UART dongle to STEVAL-ISB044V connection"). DocID04 Rev 7/57

18 Download procedure UM0 4 From the STSW-STWBCGUI, select Load FW to board in the setup menu (see Figure 0: "Firmware download via STSW-STWBCGUI"). 5 As prompted, select the CAB file containing the firmware to download (see Figure : "Firmware file selection message"). 6 As prompted, power the board on and keep it powered. 7 Follow the download progress in the DOS window and power the board off when prompted (see Figure 5: "DOS window: download in progress"). In case of problems in downloading the firmware through UART (for example, firmware corruption during update), refer to the following section.. Erasing firmware procedure using STVP.. Requirements To start the firmware erasing procedure using STVP, you have to install on your PC: ST-LINK USB driver STVP programming tool (available at ST-LINK hardware tools You also need to configure STVP as shown below. Figure 6: STVP configuration 8/57 DocID04 Rev

19 UM0.. Procedure Download procedure Power the target off. Power the target on. Connect ST-LINK circuit to the PC via USB. 4 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. Figure 7: STEVAL-ISB044V evaluation board: ST-LINK connection 5 Launch STVP software. 6 Select STM8AF666 as core. Figure 8: STVP core selection Do not upload any program into the STVP RAM area, as all bits will be erased (load ). DocID04 Rev 9/57

20 Download procedure UM0 7 Transfer the to the STWBC-EP via the SWIM interface using the appropriate push button. Figure 9: STVP download 8 Click OK if a wrong device selected alert appears. Figure 0: STVP wrong device selected alert 9 Click YES if An incompatibility has been found with this device alert appears. Figure : STVP incompatibility device action query After this operation, the programming procedure starts. At completion, the STVP informs the user that the program is loaded and verified. < PROGRAM MEMORY programming completed. > Verifying PROGRAM MEMORY area... < PROGRAM MEMORY successfully verified. 0 Exit from the STVP program. Disconnect SWIM. Remove power supply from the STEVAL-ISB044V transmitter board. Retry the UART download procedure if necessary..4 Firmware download with command line.4. Firmware download with written chip Ensure a dedicated directory has the following files: STWBC_Loader.exe stwbc_loader_not_empty.bat enable_boot.bin firmware version.cab 0/57 DocID04 Rev

21 UM0 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. COM) and firmware filename parameters ( firmware name.cab ). Figure : STSW-STWBCGUI command line.4. 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. Select Load FW to board from the STSW-STWBCGUI and power the board. Execute the command line as per the example below with the appropriate firmware filename. Figure : STSW-STWBCGUI command line with blank chip If the COM port is > COM8, the user has to use the syntax \\.\COMx where COMx is the COM port number. A dedicated tool is available for simultaneous downloads (refer to the STSW-STWBCFWDT firmware downloader tool)..5 STVP file creation To use the STVP to download, you must generate new files from the *.cab. The existing GUI gives you this possibility. Select the convert CAB to STVP files command from the STSW-STWBCGUI setup menu DocID04 Rev /57

22 Download procedure Figure 4: STSW-STWBCGUI: convert CAB to STVP files UM0 Follow the prompt to select the appropriate cabfile. Figure 5: Selecting the CAB file to be converted Follow the prompt to provide the project file name. /57 DocID04 Rev

23 UM0 Figure 6: STVP project file name Download procedure Four files will be generated as shown below. Figure 7: STVP files created.6 Firmware download with STVP Power the target off. Power the target on. Connect ST-LINK circuit to the PC via USB. 4 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 7: "STEVAL-ISB044V evaluation board: ST-LINK connection". 5 Launch STVP software. DocID04 Rev /57

24 Download procedure 6 Select STM8AF666 as core (see Figure 8: "STVP core selection"). 7 In STVP, open the Project menu and click Open. 8 Select the.stp given in the zip file. Figure 8: STVP file selection UM0 9 Wait few seconds. The following message should appear: Loading file program.hex in PROGRAM MEMORY area... < File successfully loaded. File Checksum 0xD05 It is normal that some warnings appear: > Loading file options.hex in OPTION BYTE area... FILE : line : Address 0x480 is out of range and is ignored! FILE : line : Address 0x4804 is out of range and is ignored! 0 In STVP, open the Program menu and select All tabs (on active sectors, if any) Click OK if a wrong device selected alert appears (see Figure 0: "STVP wrong device selected alert"). Click YES if An incompatibility has been found with this device alert appears (see Figure : "STVP incompatibility device action query"). After this operation, the programming procedure starts. At completion, the STVP informs the user that the program is loaded and verified. 4/57 DocID04 Rev

25 UM0 < PROGRAM MEMORY programming completed. > Verifying PROGRAM MEMORY area... < PROGRAM MEMORY successfully verified. Download procedure Exit from the STVP program. 4 Disconnect SWIM. 5 Remove power supply from the STEVAL-ISB044V transmitter board. The IAR toolchain can be installed also for firmware compilation and download. DocID04 Rev 5/57

26 Evaluation equipment setup UM0 4 Evaluation equipment setup Figure 9: STEVAL-ISB044V evaluation board: test setup configuration The board is powered via an external power supply or a USB charger. An electronic load is connected to the receiver output to load up to 5 W. On the basis of measurements, voltmeters and ammeters measure input/output voltage and current. 4. External power supply The power supply is set to V/ A for EPP mode and 5 V/ 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 0: STEVAL-ISB044V evaluation board: external power supply connection 6/57 DocID04 Rev

27 UM0 4. USB charger Evaluation equipment setup The board can be supplied by a USB charger. The jumper J0 should be set to select the USB supply input. CIA simple 5 V USB charger can be used. Considering the peak currents and the system efficiency, a 5 V/ A USB charger must be considered. At this input voltage, BPP mode only is available. It is also possible to use a Quick Charge (QC) wall charger in order to provide higher voltage. By default, D+/D- interface selects V on V BUS. This enables to support EPP mode. To provide 5 W on the receiver side and considering the system efficiency, a 4 W Quick Charge wall charger should be used. The 4 W QC wall charger, with Quick Charge.0, tested with our solution is manufactured by KOVOL. The USB cable between the charger and the board should be of good quality. To minimize the losses, a 0 AWG USB cable must be used. Figure : STEVAL-ISB044V evaluation board: power supply connection 4. UART configuration The STSW-STWBCGUI is installed on the PC connected to the board via the USB-to- UART cable (connected on the board J50 USB debug connector). This UART connection is mandatory for parameter settings and debug of the board which is using the STSW-STWBCGUI. DocID04 Rev 7/57

28 Evaluation equipment setup Figure : STEVAL-ISB044V evaluation board: UART connection UM0 8/57 DocID04 Rev

29 UM0 GUI and evaluation procedure 5 GUI and evaluation procedure The STSW-STWBCGUI thoroughly monitors STWBC-EP operations. The main screen provides transmitter and Qi receiver status information. Figure : 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. DocID04 Rev 9/57

30 GUI and evaluation procedure Figure 4: STSW-STWBCGUI: Qi protocol window UM0 You can also monitor STWBC-EP internal variables such as bridge voltage and frequency, Rx reported power, coil temperature, etc. Figure 5: 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. The parameters have the following levels of protection: Level 0: parameters can be modified without protection 0/57 DocID04 Rev

31 UM0 GUI and evaluation procedure Level : 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 6: STSW-STWBCGUI: Parameters window Parameters can be modified and their effect can be tested immediately by clicking Push to target; modified parameters lose their highlighted background. Figure 7: STSW-STWBCGUI: modified parameters The GUI embeds the STSW-STWBCFWDT downloader interface (which uses UART connection) and includes tools to generate binary files with adjusted parameters and to build new firmware packages incorporating these files. DocID04 Rev /57

32 GUI and evaluation procedure UM0 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 8: STSW-STWBCGUI: saving modified parameters (Dump to bin) Figure 9: STSW-STWBCGUI: bin file backup You can then select Modify parameters in CAB file from the setup menu and select the appropriate firmware CAB file to be patched. This operation will alter the firmware file with new tuning parameters, which can be subsequently loaded using the standard procedure. /57 DocID04 Rev

33 UM0 Figure 40: STSW-STWBCGUI: CAB file patch button GUI and evaluation procedure 5. 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. Red and green blinking once: an internal reset occurred. Red and green steady state: firmware/stwbc chip mismatch Red steady and after seconds green steady state: board hardware subversion detected does not match the firmware In steady state Green blinking: power transfer in progress Green steady state: the charge is complete Red blinking: an error has been detected, as incomplete charge due to battery fault, overvoltage, overcurrent, etc. Red steady state: the transmitter is stuck until the receiver is removed, as mentioned in the Qi standard (power transfer stopped three times in a row due to the amount of power not provided to the receiver, some types of end power transfer or no response error code) 5. Test procedure for board calibration There are auto-calibration phases in the GUI: one for the presence detection and one for the QFOD. Both calibrations are mandatory to ensure a good functioning of the transmitter board. DocID04 Rev /57

34 GUI and evaluation procedure UM0 Figure 4: 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.. Presence detection calibration procedure Set the test number to Click the Start button Figure 4: STSW-STWBCGUI: presence detection test 4/57 DocID04 Rev

35 UM0 GUI and evaluation procedure At the end of the test, in the protocol window, the AUTOCAL_TEST_DONE is set and in the test window the status is Test Done. Figure 4: STSW-STWBCGUI: test result Start the test again if the returned status is different. 5.. QFOD calibration procedure Set the test number to Click the Start button Figure 44: STSW-STWBCGUI: QFOD test At the end of the test, in the protocol window, the AUTOCAL_TEST_DONE is set and in the test window the status is Test Done. DocID04 Rev 5/57

36 GUI and evaluation procedure Figure 45: STSW-STWBCGUI: QFOD test result UM0 Start the test again if the returned status is different. 5. Efficiency Efficiency measurements are performed on a Qi certification tester. The STEVAL-ISB044V transmitter is supplied by V/ A and the receiver voltage level is V (MPB). POUT is the output power actually measured at the receiver output (not only at the rectifier output) and PIN is the input power. Efficiency is measured with a setup configuration as per the picture below. Figure 46: Efficiency setup The figure below shows the typical performance on different coils (efficiency=pout/pin). 6/57 DocID04 Rev

37 UM0 GUI and evaluation procedure Figure 47: STEVAL-ISB044V evaluation board: efficiency performance with MPB Rx Efficiency 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 0.0% 0.0% 0.0% V % Rx output Power (W) The maximum efficiency is 8.% at 7 W. 5.4 Stand-by consumption In stand-by, when the board is supplied at V, very low power consumption is achieved. In this mode, device detection is still ensured; power consumption is reduced down to.4 ma average. The STEVAL-ISB044V evaluation board has a low stand-by power of only 7 mw. To measure this low power consumption, the UART cable must be unplugged. DocID04 Rev 7/57

38 Schematic diagram UM0 6 Schematic diagram Figure 48: STEVAL-ISB044V circuit schematic ( of 8) USB_VCC_QC V DC 500 TP0 C07 00NF VIN VBUS 4.5 V NOT POPULATED VDD_STWBC C5 00NF TP00 PJ-00A J00 WIRE_SOLDER J0 SMM4FA D00 C00 NP R07 M NP C0 NP R09 0R NP C0 0 µf R00 0K C04 0NF C08 0NF U00 VIN ON/OFF GND VOUT ADJ 5 4 C6 NP C09 NP R06 0K U VIN EN TON LNM C7 µf NP L0 0 µh NP NP 5 EP GND C06 µf R0 8K PGOOD VBIAS 9 LX 6 VCC 8 FB TP0 TP0 WIRE_SOLDER C 00NF C0 0 µf C4 NP R08 NP L0. µh C 00NF LDK0M-R R04 0K C 0 µf L6984 C0 00NF 8/57 DocID04 Rev

39 UM0 Figure 49: STEVAL-ISB044V circuit schematic ( of 8) Schematic diagram DCDC_DRV DCDC_DAC_REF DCDC_DAC CS_CMP CMP_OUT_V R06 47R VIN R00 0R C7 µf Q0 N-MOS STL0NLLH5 C6 470pF DEMAGNET C06 5.6NF VDCDC VTARGET R5 00K C09 NF R09 0K TP00 R0 NP Q0 5 NPN-PNP MMDT44 R 0K R 4.7K 6 4 R.K C4 0NF R04 470R R07.K C 0PF C5 0NF R R C00 NP L µh R4 0R D0 STPS8L0DEE R0 K D0 4.V R08 75K C NP C0 00NF R0 0K C07 C0 C04 0 µf 0 µf µf C 0NF C08 µf + C05 00 µf DocID04 Rev 9/57

40 Schematic diagram Figure 50: STEVAL-ISB044V circuit schematic ( of 8) UM0 UPBL DNBL VDD_STWBC VDCDC PWM_QFOD Direct GND line connection VDCDC R09 K TP04 WIRE_SOLDER VDD_STWBC IDEMOD POWER_NODE R04 470K C00 47NF ISENSE C07 NF 4 MCP4700 PHASE PWMHI PWMLO GND HIGHDRV 8 7 BOOT VCC 6 LOWDRV 5 U00 R00 4.7R C06 00NF C0.5NF C0 NF TP0 D00 448WS R05 470K C0 47NF C04 47NF R06 470K 9 TH 5 R0 4.7R C09 470NF Q04 N-MOS STL0NLLH5 4 R0 00K Q0 N-MOS STL0NLLH TP0 TP05 WIRE_SOLDER Q0 NPN Q0 NPN-NPN C05 0 µf R07 0.0R R08 0K M00 C0 47NF TP0 HVG LVG BRIDGE_NODE VRSENSE C08 470PF R0 M µh 40/57 DocID04 Rev

41 UM0 Figure 5: STEVAL-ISB044V circuit schematic (4 of 8) Schematic diagram R400 C406 POWER_NODE 470R 4.7NF R4 8K D400 R40 8K VDD_STWBC R407 47K C404 Q400 NPN-NPN C400 0NF C40 NF R405 K R40 470K R40 50K R K C40 00PF R406 R409 R408 M 00K C40 PF 4.7NF 00K TP400 SYMBOL_DETECT R40.K C405 0NF DocID04 Rev 4/57

42 Schematic diagram Figure 5: STEVAL-ISB044V circuit schematic (5 of 8) UM0 TP5 TP50 TP507 VDD_STWBC VDD_STWBC STWBC-EP Digital controller C50 00NF R5 00K TP504 C50 UF VOUT DEMAGNET SWIM 7 SYMBOL_DETECT RESET 8 SWIM NRST DNBL_FB 6 IC_SDA DCDC_DRV IC_SCL DCDC_DRV DCDC_DAC 4 5 DCDC_DAC UPBL UPBL CMP_OUT_V 8 CMP_OUT_V DNBL DNBL CS_CMP 9 CS_CMP PWM_QFOD 0 PWM_QFOD DCDC_DAC_REF DCDC_DAC_REF WAVE_SNS CURRENT_DEMOD CURRENT_DEMOD UART_TX UART_RX LED QC_IO QC_IO TANK_VOLTAGE 5 TANK_VOLTAGE 6 VTARGET TP509 VTARGET QFOD_ADC 7 QFOD_ADC COIL_TEMP 8 ISENSE 9 ISENSE VMAIN 0 VBUS VDD_STWBC DEMAGNET SYMBOL_DETECT TP50 VDD_STWBC R56 VDD_STWBC R58 00K VDD_STWBC R57 00K R50 K IDEMOD Layout note : GND reference of the Op Amp inputs have to be connected in star ground connection with the GND plan of the power bridge. USB f or UART Debug FOR DEBUG DNBL POWER_NODE POWER_NODE POWER_NODE C5 0PF D504 BAV99W VDD_STWBC R5 M QFOD_ADC D509 R5 47K RB50S R56 K BAS5-7 C54.NF D500 BAS5-7 VDD_STWBC VDD_STWBC D506 R5 GREEN 0R R54 0R D507 RED 00R D50 NF BAV99W R59 K R50 80K C5 PF 00NF R58 TP508 00K L50 K R50 0K C500 00NF R5 00K TP50 R505 0K Q500 R59 K 47K C507 0NF J50 SHELL SHELL SHELL SHELL USB_VCC USBDM USBDP ID 4 USB_GND 5 J500 U50 +IN V+ V- -IN OUT TSV5ICT C5 00NF D508 R506 00K C NTC TP506 L50 K R504 0K C50 00NF TP50 C504 NF R55 U500 STWBC_EP NPN-PNP VDD_STWBC SWIM R50 00K RESET C505 R507 NF.7K C509 C50 00NF VSS VSS VSSA VDD 9 VDDA USB_DM USB_DP IC_SCL R55 K IC_SDA R57 M USB_DM USB_DP WAVE_SNS C508. µf R50 0R TANK_VOLTAGE WAVE_SNS CURRENT_DEMOD 4/57 DocID04 Rev

43 UM0 Figure 5: STEVAL-ISB044V circuit schematic (6 of 8) Schematic diagram M600 M60 M60 M60 M0 KRSTMCZ00- M0 KRSTMCZ00- M0 KRSTMCZ00- M0 KRSTMCZ00- M604 M605 M606 M607 M69 WExxx_xx M60 SPACER_MM_MP_A6-A D0475 D0475 D0475 D0475 M6 M6 M6 M64 HOLE_.MM_6 HOLE_.MM_6 HOLE_.MM_6 HOLE_.MM_6 M608 M609 M60 M6 HTSB-M-5-5- HTSB-M-5-5- HTSB-M-5-5- HTSB-M-5-5- M65 M66 M67 OPTICAL_TARGET OPTICAL_TARGET OPTICAL_TARGET Figure 54: STEVAL-ISB044V circuit schematic (7 of 8) VDD_STWBC Q700 6 USB_VCC_QC J700 SHELL SHELL SHELL SHELL USB_VCC USBDM USBDP ID 4 USB_GND 5 USB_DM_QC USB_DP_QC R70 0R R70 K 5 R70 9K R700 00K VDD_STWBC R704 00K R705 QC_IO USB for Quick Charge A on pin & pin 5 A on other pins R706 0R 4 NPN-NPN R707 9K NP DocID04 Rev 4/57

44 Schematic diagram Figure 55: STEVAL-ISB044V circuit schematic (8 of 8) UM0 USB IO Voltage selection (V / 5V) VCC_IO 5V R80 V 0R R807 For debug VBUS_USB_MASTER R80 VBUS NP 9 0 VSS RESET# DCD# VSS VCC_IO 8 GND CTS# R805 0R VCCO 7 VSS VOUT CBUS4 R80 0K USBDM_DONGLE 6 USBDM CBUS R808 0R USBDP_DONGLE 5 4 USBDP CBUS FTR VSS VSS VSS VBUS VSS J80 USB_VCC USBDM USBDP USB_GND SHELL SHELL J SHELL SHELL 7 8 SHELL SHELL4 R804 0R VBUS USBDP USBDM GND 4 VBUS External NP Power Supply Connector R80 U80 VBUS_USB_MASTER L800 TXD 0R 8 TXD OSCO VCC_IO 0R 7 C80 OSCI DTR# C806 C80 VSS 0NF 6 0UF 00NF TEST RTS# C807 5 VCCIO 4 00NF AGND VSS VSS VSS 4 NC RXD 5 VSS R806 D800 USBLC6-SC6 6 RXD CBUS0 RI# 6 0R I/O#6 I/O# 7 CBUS GND 5 VBUS GND 8 VSS GND NC 4 R809 I/O#4 I/O# 0 9 0K VCC5I DSR# C804 C805 C80 47PF 47PF 00NF 44/57 DocID04 Rev

45 UM0 Bill of materials 7 Bill of materials Item Q. ty Table 6: STEVAL-ISB044V bill of materials Ref. Part/Value Description Manufacturer Order code C00, C4 C0, C0 NP, µf, 5 V, 06, ±0% C0 NP, C04, C08, C, C507 C06, C04, C08, C7 C07, C0, C5, C06, C500, C50, C50, C509 C09, C6, C00, C 8 C 9 4 C, C, C50, C5 0 NF, 50 V, 040, ±5% µf, 5 V, 0, ±0% 00 NF, 5 V,040, ±5% NP, µf, 0 V, 0805, ±0% 00 NF, 50 V, 040, ±5% 0 C7 NP, 060 C0 C0, C07 C05 4 C06 5 C09 00 NF, 50 V, 060, ±5% 0 µf, 50 V, 06, ±0% 00 µf, 5 V, ±0% 5.6 NF, 50 V, 040, ±5% NF, 50 V, 040, ±5% capacitors capacitors capacitor capacitors capacitors capacitors capacitors capacitor capacitors capacitor capacitor capacitors Aluminium capacitor capacitor capacitor Wurth Elektronik Wurth Elektronik Murata Murata Murata Panasonic C_NP_ C_NP_0 0NF_50V_X7R_ NF_5V_X5R_040 C_NP_040 GRMBR7A06KE5L 00NF_50V_X5R_040 GRM88R6E05KAJ GRM88R7H04KA9D 0UF_50V_X5R_06 EEEFTV0AP 5.6NF_50V_X7R_040 NF_50V_X5R_040 DocID04 Rev 45/57

46 Bill of materials Q. Item Ref. Part/Value Description Manufacturer Order code ty 6 C 7 C4,C 5 8 C6 9 4 C00, C0, C0, C04 0 C0 C05 C07, C505 C08 4 C09 5 C0 6 C400 7 C40 8 C40 9 C40, C5 0 C404 C405 C406 C50 4 C504, C506 5 C508 6 C5 0 PF, 50 V, 040, ±5% 0 NF, 5 V, 060, ±5% 470pF, 50V,5% 47 NF, 00 V, 06, ±5% NF, 50 V, 060, ±5% 0 µf, 6. V, 0805, ±5% NF, 50 V, 040, ±5% 470 PF, 50 V, 040, ±5% 470 NF, 5 V, 06, ±5%.5 NF, 50 V, 040, ±0% 0 NF, 00 V, 0805, ±5% NF, 00 V, 0, ±5% 00 PF, 50 V, 040, ±5% PF, 50 V, 040, ±5% 4.7 NF, 50 V, 040, ±5% 0NF, 50V,0% 4.7 NF, 00 V, 060, ±0% µf, 6 V, ±0% NF, 00 V, 040, ±5%. µf, 5 V, 040, ±0% 0 PF, 50 V, 040, ±5% capacitor capacitors capacitor capacitors capacitor capacitor capacitors capacitor capacitor capacitor capacitor capacitor capacitor TDK TDK TDK UM0 0PF_50V_X7R_040 0NF_5V_X7R_ pF_50V_COG_40 C6C0GA47J5AC NF_50V_X5R_060 0UF_6V_X5R_0805 NF_50V_X7R_ PF_50V_X7R_ NF_5V_X7R_06.5NF_50V_X7R_040 C0C0GA0J5AA C5C0GAJ60AA 00PF_50V_COG_040 Cer,40 PF_50V_COG_040 capacitor capacitor capacitor capacitor capacitors capacitor capacitor TDK 4.7NF_50V_X7R_040 0NF_50V_X7R_040 CGAEX7RA47K080 AA UF_6V_X5R_040 NF_00V_X7R_040.UF_5V_X5R_040 0PF_50V_X7R_040 46/57 DocID04 Rev

47 UM0 Q. Item Ref. Part/Value Order code ty Description Manufacturer 7 C54 8 C80, C80, C807 9 C80 40 C804, C805 4 C806. NF, 50 V, 040, ±5% 00 NF, 50 V, 060, ±5% 0 NF, 50 V, 060, ±5% 47 PF, 5 V, 060, ±5% 0 µf, 5 V, 0805, ±0% capacitor capacitors capacitor capacitors capacitor Bill of materials.nf_50v_x7r_040 00NF_50V_X7R_060 0NF_50V_X7R_060 47PF_5V_X5R_060 0UF_5V_X7R_ D00 SMM4FA TVS ST SMM4FA-TR 4 D0 STPS8L0DEE Power Schottky rectifier ST STPS8L0DEE-TR DocID04 Rev 47/57

48 Board assembly and layout UM0 8 Board assembly and layout The STEVAL-ISB044V evaluation board is designed using a low cost -layers PCB with all the components on the top side. The test points allow the user to evaluate the STWBC-EP solution with probes. In addition, UART is accessible through a micro-usb connector and the SWIM is routed to a header connector. Figure 56: STEVAL-ISB044V evaluation board: functional block assembly LDO (DCDC optional) Demodulation circuits STWBC-EP Voltage/current demodulation circuits LED, SWIM and USB/UART debug connectors v Power Supply connections & input filtering Boost Circuit Quick Charge circuit Half bridge driver and LC Tank circuit 48/57 DocID04 Rev

49 UM0 8. Power signals (BOOST, GND, LC) Board assembly and layout Figure 57: STEVAL-ISB044V evaluation board: power signal routing Layer : large GND tracks with lot of vias for high power circuits Layer : Large tracks for high current circuits (booster, half bridge, LC tank) Figure 58: STEVAL-ISB044V evaluation board: ground plan Full GND plan on Layer Only a few noisy signals routed partially on this layer (PWM) DC-DC boost signals are designed on the same layer: tracks must be wide (> mm) to handle high current. DocID04 Rev 49/57

50 Board assembly and layout Figure 59: STEVAL-ISB044V evaluation board: DC-DC boost routing details UM0 VIN Net VIN R00 C7 µf Net L00 D0-QQ0 L µh TP00 0R R4 C6 4 Q0 N-MOS STL0NLLH5 C00 NP 0R 470pF D0 STPS8L0DEE Net D0-C05 C07 C0 C06 00NF 5.6NF 0 µf VDCDC C0 C04 0 µf µf C08 µf + C05 00 µf Net Q0 R05 R0 K C09 NF DEMAGNET R04 470R R R R5 00K D0 4.V Figure 60: STEVAL-ISB044V evaluation board: power GND routing details VIN USB_VCC_QC 4 R00 0 R GND from R05 and C7: high current A lot of vias ONLY in this area C7 µf 4 Q0N-MOS STL0NLLH5 PJ-00A J00 V DC TP00 WIRE_SOLDER J0 SMM4FA GND directly connected to TP0 and Capa connect bottom side with a lot of vias D00 C00 NP C 00NF C0 0 µf C4 C0 NP NP R04 470R R R TP0 WIRE_SOLDER GND VBOOST and GND Capa of tank on the same area Insert many vias for high current ONLY in this area TP0 VRSENSE R07 0.0R TP00 VDCDC C07 C0 C06 C0 C04 C08 + C05 00NF 5.6NF 0 µf 00 µf 0 µf µf µf C00 47NF GND from R07: connected near GND from " GND VBOOST" TP0 Direct GND line connection POWER_NODE C0 47NF C0 47NF C04 47NF Bridge nets are designed on the top layer; traces must be very large (> mm). 50/57 DocID04 Rev

51 UM0 Board assembly and layout Figure 6: STEVAL-ISB044V evaluation board: bridge node routing details Net VDCDC-Q0 VDCDC VDCDC Q0 N-MOS STL0NLLH5 PWM_QFOD D00 448WS Q04 N-MOS STL0NLLH5 C0.5NF R09 K TP04 WIRE_SOLDER POWER_NODE C00 47NF C0 47NF M Q0 NPN TP05 WIRE_SOLDER µh C0 NF BRIDGE_NODE Net bridge node Net power node C0 C04 47NF 47NF Net GND Figure 6: STEVAL-ISB044V evaluation board: shunt resistor routing details 4 Q04 N-MOS STL0NLLH5 C0 NF VRSENSE trace between Q04 and R07 must be very short TP0 VRSENSE R07 0.0R TP0 Direct GND line connection GND -R07 connected directed to GND - VBOOST DocID04 Rev 5/57

52 Board assembly and layout 8. EMI components Figure 6: STEVAL-ISB044V evaluation board: EMI components ( of ) UM0 R4 0R R4 and C6 very close to D0 D0 C6 470pF VDCDC TP00 C0 and C06 near C05 VDCDC and C05 GND STPS8L0DEE C0 00NF C06 5.6NF C07 0 µf C0 0 µf C04 µf C08 µf + C05 00 µf R0 K C0 R4 - C6 C06 capacitors (C00, C0, C0, C, C4 and C00) for EMI and filters must be placed close to the supply input and L0. Figure 64: STEVAL-ISB044V evaluation board: EMI components ( of ) USB_VCC_QC J0 TP00 WIRE_SOLDER V DC L0. µh PJ-00A J00 SMM4FA D00 C00 NP C 00NF C0 0 µf C4 NP C0 NP C0 0 µf TP0 WIRE_SOLDER 5/57 DocID04 Rev

53 UM0 Board assembly and layout 8. STWBC-EP layout Figure 65: STWBC-EP digital controller layout L50 K C50-L50 near VDDA (pin) C50 VDD 9 VDDA 00NF DEMAGNET SYMBOL_DETECT C0 C50-C50-L50 near VDD (pin9) L50 C50 C50 L50 C C50 C00 R505 L50 K STWBC-EP R505 0K Digital controller C50 00NF C50 UF VOUT VDD 9 R505 near Reset (pin 8) SWIM RESET 7 8 SWIM NRST DCDC_DRV DCDC_DAC 4 DCDC_DRV DCDC_DAC DocID04 Rev 5/57

54 6 5 4 Board assembly and layout 8.4 Current sensing and demodulation Figure 66: STEVAL-ISB044V evaluation board: current sensing UM0 VDD_STWBC R0 M IDEMOD R0 00K TP0 R04 470K ISENSE VRSENSE R07 0.0R C08 470PF R05 470K R06 470K C07 NF Direct GND line connection R08 0K Q0 NPN-NPN C07 near Isense input (pin 9) Current amplifier (Q0, R and C) near VRSENSE Warning: R08 GND is done through a trace connected to GND on Rsense R07 Don't mix this track with ground plane C07 Q0 R08 Figure 67: STEVAL-ISB044V evaluation board: current demodulation C508. µf VDD_STWBC VDD_STWBC C509 IDEMOD R57 M U50 +IN + V- -IN - TSV5ICT V+ 5 OUT 4 00NF C50 00NF R58 00K CURRENT_DEMOD R59 TP508 C50, R58, R59 near Current_demod input (U500 pin ) C5 K C5 PF C5 00NF 0PF D504 R50 0R BAV99W C50 R59 R58 CURRENT_DEMOD TANK_VOLTAGE 5 6 VTARGET QFOD_ADC 7 COIL_TEMP 8 ISENSE 9 VMAIN 0 Current demod (U50, R and C) near Current amplifier output (Q0) CURRENT_DEMOD TANK_VOLTAGE VTARGET QFOD_ADC ISENSE VBUS C5 Q0 U50 Q0 C50 C5 L50 R57 C50 R08 U50 C5 C5 L50 C50 R08 L50 CC50 R57 C50 C5 C5 R505 R505 C Q0C00 Q0C00 54/57 DocID04 Rev

55 UM0 References 9 References Freely available on STWBC-EP datasheet. STEVAL-ISB044V data brief (DB408): "Qi MP-A0 5 W wireless charger TX evaluation kit based on STWBC-EP". STSW-ISB044FW data brief (DB409): "Firmware for the STEVAL-ISB044V wireless power transmitter evaluation board based on STBWC-EP" 4. STSW-STWBCFWDT data brief (DB40): "STWBC firmware downloader tool" 5. STSW-STWBCGUI data brief (DB48): "Graphical user interface for wireless power transmitter evaluation boards based on the STWBC chip family" DocID04 Rev 55/57

56 Revision history UM0 0 Revision history Table 7: Document revision history Date Version Changes 0-Oct-07 Initial release. 56/57 DocID04 Rev

57 UM0 IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to 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. 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 products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 07 STMicroelectronics All rights reserved DocID04 Rev 57/57