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

Transcription

1 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.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-MPA0 topology, the STEVAL-ISB044V supports a 5-3 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 2-layer PCB, graphical interfaces and tools. Figure. STEVAL-ISB044V evaluation board UM230 - Rev 2 - May 208 For further information contact your local STMicroelectronics sales office.

2 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..2 Package contents Hardware: a STEVAL-ISB044V evaluation board ST-LINK/V2 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 UM230 - Rev 2 page 2/7

3 Hardware description and setup 2 Hardware description and setup 2. System block diagram Figure 2. STWBC-EP block diagram 2.2 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.2.3 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) 2-layer PCB for easy design Flash memory-based UM230 - Rev 2 page 3/7

4 STEVAL-ISB044V wireless transmitter board overview RoHS compliant Table. STEVAL-ISB044V electrical performance: input characteristics Parameter Input characteristics Min. Typ. Max. Unit Notes and conditions Vin Input voltage V Iin Input current.6 2 A Vin nominal, Iout = max. on MPB Rx Input no-load current Input stand-by current ma.4 ma At typical voltage Table 2. 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= 2 V, P Out Rx = 5 W UM230 - Rev 2 page 4/7

5 STEVAL-ISB044V wireless transmitter board overview Figure 3. STEVAL-ISB044V evaluation board: connectors, LEDs and test points UM230 - Rev 2 page 5/7

6 STEVAL-ISB044V wireless transmitter board overview Figure 4. STEVAL-ISB044V evaluation board: power supply selection Table 3. Connector description Connector reference J00 J0 J500 J50 J700 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 2 V 2 V power supply connection TP0 GND GND power connection TP02 VIN Input voltage TP03 VDD_STWBC 4.5V LDO output voltage TP200 VDCDC Boost output voltage TP30 ISENSE Current measurement TP302 GND Power GND connection (Rsense) TP303 VRSENSE Rsense resistor voltage TP304 Wireless charging coil connection UM230 - Rev 2 page 6/7

7 STWBC-EP pinout and pin description Test point reference Signal Description TP305 Wireless charging coil connection TP400 SYMBOL_DETECT Symbol detector TP50 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 GND Ground TP508 CURRENT_DEMOD Symbol detector TP509 QC_IO Quick charge circuit signal TP50 GND Ground TP5 GND Ground 2.3 STWBC-EP pinout and pin description TheSTWBC-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 UM230 - Rev 2 page 7/7

8 STWBC-EP pinout and pin description Table 5. STWBC-EP pin description Pin number Pin name Pin type Firmware description UART_RX DI Uart RX link on USB debug connector 2 PWM_QFOD DO PWM dedicated to QFOD circuit 3 I2C_SDA I2C_SDA 4 I2C_SCL I2C_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 2 CURRENT_DEMOD AI Current demodulation 3 VDDA PS Analog power supply 4 VSSA PS Analog ground 5 TANK_VOLTAGE AI Analog input to measure the LC voltage (power calculation) 6 VTARGET AI Boost voltage measurement 7 QFOD_ADC AI High sensitivity peak voltage detector used for Quality Factor measurement 8 COIL_TEMP AI Analog input for temperature measurement. The input is connected to external NTC biased to VDD_STWBC 9 ISENSE AI Analog input to measure the current flowing into the power bridge 20 VMAIN AI Analog input to measure the main power supply 2 DCDC_DRV DO DCDC boost PWM drive 22 DEMAGNET DI Boost demagnetization 23 SYMBOL_DETECT DI Voltage demodulation 24 DCDC_DAC DO Boost PWM output DAC (setting the CPP3 comparator voltage reference) 25 UPBL DO Output driver for high side branch 26 DNBL_FB Used for hardware PWM programmation 27 SWIM DIO Digital IO for debug interface 28 NRST DI Reset 29 VDD PS Digital and I/O power supply 30 VSS PS Digital and I/O ground 3 VOUT Supply Internal LDO output 32 UART_TX DO Uart TX link on USB debug connector Note: AlI analog inputs are VDD compliant but can be used only between 0 and.2 V. UM230 - Rev 2 page 8/7

9 Download procedure 3 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. 3. STSW-STWBCGUI software installation Step. Install the GUI by launching the STWBC_GUI_Setup.msi installation file Figure 6. STSW-STWBCGUI installation file Step 2. Step 3. 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 Step 4. Enter a specific COM port number (if not listed in the selection window) in the Special text box (e.g., COM2 or the specific syntax \\.\COM2 ) If the GUI is switched off, ensure that the COM port is not used on your computer. Otherwise, try another USB port. UM230 - Rev 2 page 9/7

10 Firmware download via STSW-STWBCGUI Figure 8. STSW-STWBCGUI start screen Step 5. Press OK. The GUI is ready to run. 3.2 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 Download procedure with a new chip (never been programmed) If the chip has never been programmed, the download mode is enabled by default. Step. Connect the USB-to-UART dongle to the computer. Note: Do not connect the transmitter board for the moment. UM230 - Rev 2 page 0/7

11 Firmware download via STSW-STWBCGUI Figure 9. Dongle connection Step 2. From the GUI, select Load FW to board from the setup menu. UM230 - Rev 2 page /7

12 Firmware download via STSW-STWBCGUI Figure 0. Firmware download via STSW-STWBCGUI Step 3. As prompted, select the CAB file containing the firmware to download Figure. Firmware file selection message UM230 - Rev 2 page 2/7

13 Firmware download via STSW-STWBCGUI Figure 2. Firmware file selection Step 4. Supply the board with 2 V and keep it powered. Figure 3. Power on message Step 5. When the DOS window appears, connect the transmitter board to the dongle using a micro-usb cable. UM230 - Rev 2 page 3/7

14 Firmware download via STSW-STWBCGUI Important: Take care to connect it to the USB debug connector J50 on the opposite side of the power supply connection. Figure 4. USB-to-UART dongle to STEVAL-ISB044V connection Step 6. Follow the download progress in the DOS window and power off the board 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. Step. Supply the transmitter board via a power supply set to2 V. Step 2. Connect the USB-to-UART dongle to the transmitter board. UM230 - Rev 2 page 4/7

15 Erasing firmware procedure using STVP Step 3. Step 4. Step 5. Step 6. Step 7. 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). From the STSW-STWBCGUI, select Load FW to board from the setup menu (see Figure 0. Firmware download via STSW-STWBCGUI). As prompted, select the CAB file containing the firmware to download (see Figure. Firmware file selection message). As prompted, power the board on and keep it powered. 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. 3.3 Erasing firmware procedure using STVP 3.3. 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 UM230 - Rev 2 page 5/7

16 Erasing firmware procedure using STVP Procedure Step. Step 2. Step 3. Step 4. 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. Note: 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 Step 5. Step 6. Launch STVP software. Select STM8AF666 as core. Figure 8. STVP core selection Note: Do not upload any program into the STVP RAM area, as all bits will be erased (load ). Step 7. Transfer the to the STWBC-EP via the SWIM interface using the appropriate push button. Figure 9. STVP download Step 8. Click OK if a wrong device selected alert appears. UM230 - Rev 2 page 6/7

17 Firmware download with command line Figure 20. STVP wrong device selected alert Step 9. Click YES if An incompatibility has been found with this device alert appears. Figure 2. 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. Step 0. Step. Step 2. Step 3. Exit from the STVP program. Disconnect SWIM. Remove power supply from the STEVAL-ISB044V transmitter board. Retry the UART download procedure if necessary. 3.4 Firmware download with command line 3.4. Firmware download with written chip Step. Step 2. Ensure a dedicated directory has the following files: STWBC_Loader.exe stwbc_loader_not_empty.bat enable_boot.bin firmware version.cab 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 ). UM230 - Rev 2 page 7/7

18 STVP file creation Figure 22. STSW-STWBCGUI command line Firmware download with blank chip If the STWBC-EP memory is erased, the procedure sequence is a bit different. Step. Step 2. Step 3. 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 23. STSW-STWBCGUI command line with blank chip Note: Note: If the COM port is > COM8, the user has to use the syntax \\.\COMxwhere COMx is the COM port number. A dedicated tool is available for simultaneous downloads (refer to the STSW-STWBCFWDT firmware downloader tool). 3.5 STVP file creation To use the STVP to download, you must generate new files from the *.cab. The existing GUI gives you this possibility. Step. Select the convert CAB to STVP files command from the STSW-STWBCGUI setup menu UM230 - Rev 2 page 8/7

19 STVP file creation Figure 24. STSW-STWBCGUI: convert CAB to STVP files Step 2. Follow the prompt to select the appropriate cabfile. UM230 - Rev 2 page 9/7

20 STVP file creation Figure 25. Selecting the CAB file to be converted Step 3. Follow the prompt to provide the project file name. Figure 26. STVP project file name Four files will be generated as shown below. UM230 - Rev 2 page 20/7

21 Firmware download with STVP Figure 27. STVP files created Step Firmware download with STVP Step. Step 2. Step 3. Step 4. 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. Note: 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. Step 5. Step 6. Step 7. Step 8. Launch STVP software. Select STM8AF666 as core (see Figure 8. STVP core selection). In STVP, open the Project menu and click Open. Select the.stp given in the zip file. UM230 - Rev 2 page 2/7

22 Firmware download with STVP Figure 28. STVP file selection Step 9. Wait few seconds. The following message should appear: Loading file program.hex in PROGRAM MEMORY area... < File successfully loaded. File Checksum 0xD205 Note: It is normal that some warnings appear: > Loading file options.hex in OPTION BYTE area... FILE : line 2: Address 0x4802 is out of range and is ignored! FILE : line 2: Address 0x4804 is out of range and is ignored! Step 0. Step. Step 2. 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 20. STVP wrong device selected alert). Click YES if An incompatibility has been found with this device alert appears (see Figure 2. 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. Step 3. Step 4. Step 5. Exit from the STVP program. Disconnect SWIM. Remove power supply from the STEVAL-ISB044V transmitter board. UM230 - Rev 2 page 22/7

23 Firmware download with STVP The IAR toolchain can be installed also for firmware compilation and download. UM230 - Rev 2 page 23/7

24 Evaluation equipment setup 4 Evaluation equipment setup Figure 29. 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 2 V/2 A for EPP mode and 5 V/2 A for BPP mode. The board is connected to the external power suplly through wires. The jumper has to be set to select the jack/external power supply input. Figure 30. STEVAL-ISB044V evaluation board: external power supply connection UM230 - Rev 2 page 24/7

25 USB charger 4.2 USB charger 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/2 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+/Dinterface selects 2V on V bus. This enables to support EPP mode. To provide 5 W on the receiver side and considering the system efficiency, a 24 W Quick Charge wall charger should be used. The 24W QC wall charger, with Quick Charge 3.0, 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 20 AWG USB cable must be used. Figure 3. STEVAL-ISB044V evaluation board: USB charger connection 4.3 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). UM230 - Rev 2 page 25/7

26 UART configuration Important: This UART connection is mandatory for parameter settings and debug of the board which is using the STSW-STWBCGUI. Figure 32. STEVAL-ISB044V evaluation board: UART connection UM230 - Rev 2 page 26/7

27 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 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. UM230 - Rev 2 page 27/7

28 GUI and evaluation procedure 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. UM230 - Rev 2 page 28/7

29 GUI and evaluation procedure 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. The parameters have the following levels of protection: Level 0: parameters can be modified without protection 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. UM230 - Rev 2 page 29/7

30 GUI and evaluation procedure Figure 36. 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. UM230 - Rev 2 page 30/7

31 GUI and evaluation procedure Figure 37. 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. 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. UM230 - Rev 2 page 3/7

32 GUI and evaluation procedure Figure 38. STSW-STWBCGUI: saving modified parameters (Dump to bin) UM230 - Rev 2 page 32/7

33 GUI and evaluation procedure Figure 39. 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. UM230 - Rev 2 page 33/7

34 Status LEDs Figure 40. STSW-STWBCGUI: CAB file patch button 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 2 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, overcurren, etc. UM230 - Rev 2 page 34/7

35 Test procedure for board calibration 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) 5.2 Test procedure for board calibration There are 2 auto-calibration phases in the GUI: one for the presence detection and one for the QFOD. Important: Both calibrations are mandatory to ensure a good functioning of the transmitter board. Figure 4. STSW-STWBCGUI: start auto-calibration Note: 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 Presence detection calibration procedure Step. Set the test number to Step 2. Click the Start button UM230 - Rev 2 page 35/7

36 Test procedure for board calibration Figure 42. STSW-STWBCGUI: presence detection 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. Figure 43. STSW-STWBCGUI: test result Step 3. Start the test again if the returned status is different QFOD calibration procedure UM230 - Rev 2 page 36/7

37 Test procedure for board calibration Step. Set the test number to 2 Step 2. 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. Figure 45. STSW-STWBCGUI: QFOD test result UM230 - Rev 2 page 37/7

38 Efficiency Step 3. Start the test again if the returned status is different. 5.3 Efficiency Efficiency measurements are performed on a Qi certification tester. The STEVAL-ISB044V transmitter is supplied by 2 V/2 A and the receiver voltage level is 2 V (MPB). P OUT is the output power actually measured at the receiver output (not only at the rectifier output) and P IN is the input power. Efficiency is measured the setup configuration as per the picture below. Figure 46. Efficiency setup The figure below shows the typical performance on different coils (efficiency=p OUT /P IN ). Figure 47. STEVAL-ISB044V evaluation board: efficiency performance with MPB Rx 90.0% 80.0% 70.0% 60.0% Efficie ncy 50.0% 40.0% 30.0% 20.0% 0.0% V % Rx output Power (W) The maximum efficiency is 82.2% at 7 W. 5.4 Stand-by consumption In stand-by, when the board is supplied at 2 V, very low power consumption is achieved. In this mode, device detection is still ensured; power consumption is reduced down to.4 ma average. UM230 - Rev 2 page 38/7

39 Stand-by consumption 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. UM230 - Rev 2 page 39/7

40 Schematic diagrams 6 Schematic diagram Figure 48. STEVAL-ISB044V circuit schematic ( of 8) USB_VCC_QC 2 V DC 500 TP02 C07 00NF VIN VBUS 4.5 V NOT POPULATED VDD_STWBC C5 00NF TP00 PJ-002A J00 WIRE_SOLDER 3 2 J0 2 SMM4F3A D00 C00 NP R07 M NP C02 NP R09 0R NP C03 0 µf R00 220K C04 0NF C08 0NF 3 2 U00 VIN ON/OFF GND VOUT ADJ 5 4 C6 NP C09 NP R06 20K U VIN EN TON LNM PGOOD VBIAS 9 LX 6 VCC 8 FB 2 C7 µf NP L02 0 µh NP NP 3 5 EP GND C06 22 µf R0 8K TP03 TP0 WIRE_SOLDER C2 00NF C0 0 µf C4 NP R08 NP L0 2.2 µh C3 00NF LDK320M-R R04 330K C 0 µf L6984 C0 00NF UM230 - Rev 2 page 40/7

41 Schematic diagrams Figure 49. STEVAL-ISB044V circuit schematic (2 of 8) DCDC_DRV DCDC_DAC_REF DCDC_DAC CS_CMP CMP_OUT_V R206 47R VIN R200 0R C27 22 µf Q203 N-MOS STL0N3LLH5 C26 470pF DEMAGNET C NF VDCDC VTARGET R25 00K C209 NF R K TP200 R20 NP Q NPN-PNP MMDT443 R2 0K R23 4.7K R22 3.3K C24 220NF R R R K C23 0PF C25 220NF R R C200 NP L µh R24 0R D20 STPS8L30DEE R202 K D V R208 75K C2 NP C202 00NF R20 0K C207 C203 C204 0 µf 0 µf 22 µf C22 0NF C µf + C µf UM230 - Rev 2 page 4/7

42 Schematic diagrams Figure 50. STEVAL-ISB044V circuit schematic (3 of 8) UPBL DNBL VDD_STWBC VDCDC PWM_QFOD Direct GND line connection VDCDC R309 K TP304 WIRE_SOLDER VDD_STWBC IDEMOD POWER_NODE R K C300 47NF ISENSE C307 22NF MCP4700 PHASE PWMHI PWMLO GND HIGHDRV 8 BOOT 7 VCC 6 LOWDRV 5 U300 R R C306 00NF C30.5NF C303 NF TP302 D WS R K C30 47NF C304 47NF R K 9 TH 5 R30 4.7R C NF Q303 N-MOS STL0N3LLH5 Q304 N-MOS STL0N3LLH5 4 R303 00K TP303 TP305 WIRE_SOLDER Q302 NPN M300 Q30 NPN-NPN C302 47NF C305 0 µf R R R308 0K TP30 HVG LVG BRIDGE_NODE VRSENSE C PF R302 M 2 µh UM230 - Rev 2 page 42/7

43 Schematic diagrams Figure 5. STEVAL-ISB044V circuit schematic (4 of 8) R400 C406 POWER_NODE 470R 4.7NF R4 82K 3 D400 R40 82K VDD_STWBC R407 47K C Q400 NPN-NPN C400 0NF C40 22NF R405 22K R K R402 50K R K C402 00PF R406 R409 R408 M 00K C403 22PF 4.7NF 00K TP400 SYMBOL_DETECT R40 2.2K C NF UM230 - Rev 2 page 43/7

44 Figure 52. STEVAL-ISB044V circuit schematic (5 of 8) TP5 TP50 TP507 VDD_STWBC VDD_STWBC STWBC-EP Digital controller C50 00NF R53 00K TP504 C503 UF 3 22 VOUT DEMAGNET 23 SWIM 27 SYMBOL_DETECT RESET 28 SWIM NRST DNBL_FB 26 I2C_SDA 3 DCDC_DRV 2 I2C_SCL DCDC_DRV DCDC_DAC 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 2 CURRENT_DEMOD 32 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 20 VBUS VDD_STWBC DEMAGNET SYMBOL_DETECT TP50 VDD_STWBC R56 VDD_STWBC R528 00K VDD_STWBC R527 00K R530 33K 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 220PF D504 BAV99W VDD_STWBC R52 M QFOD_ADC D509 R522 47K RB520S R526 K BAS52-7 C54 2.2NF D500 BAS52-7 VDD_STWBC VDD_STWBC 3 2 D506 R52 GREEN 220R R54 220R D507 RED D50 NF BAV99W R59 22K 2 3 R50 80K C53 22PF 00NF R58 TP508 00K L502 K R502 0K C500 00NF R5 00K TP503 R505 0K Q500 R529 33K 47K C507 0NF J50 SHELL SHELL SHELL SHELL USB_VCC USBDM 2 USBDP 3 ID 4 USB_GND 5 J500 U50 +IN 2 V- V+ 3 -IN OUT TSV52ICT C52 00NF D508 R506 00K C NTC TP506 L50 K R504 0K C502 00NF TP502 C504 NF R55 00R U500 STWBC_EP NPN-PNP VDD_STWBC SWIM R503 00K RESET C505 R507 22NF 2.7K C509 C50 00NF UM230 Schematic diagrams VSS VSS VSSA VDD 29 VDDA 3 USB_DM USB_DP I2C_SCL R525 K I2C_SDA R57 M USB_DM USB_DP WAVE_SNS C µf R R TANK_VOLTAGE WAVE_SNS CURRENT_DEMOD UM230 - Rev 2 page 44/7

45 Schematic diagrams Figure 53. STEVAL-ISB044V circuit schematic (6 of 8) M600 M60 M602 M603 M320 KRSTMCZ00- M320 KRSTMCZ00- M320 KRSTMCZ00- M320 KRSTMCZ00- M604 M605 M606 M607 M69 WExxx_2xx M620 SPACER_3MM_MP_A6-A2 D0475 D0475 D0475 D0475 M62 M622 M623 M624 HOLE_3.2MM_6 HOLE_3.2MM_6 HOLE_3.2MM_6 HOLE_3.2MM_6 M608 M609 M60 M6 HTSB-M HTSB-M HTSB-M HTSB-M M625 M626 M627 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 2 USBDP 3 ID 4 USB_GND 5 USB_DM_QC USB_DP_QC R70 0R R703 33K R702 39K R700 00K VDD_STWBC R704 00K R705 QC_IO USB for Quick Charge 3 A on pin & pin 5 A on other pins R706 0R 4 NPN-NPN R707 39K NP UM230 - Rev 2 page 45/7

46 Schematic diagrams Figure 55. STEVAL-ISB044V circuit schematic (8 of 8) USB IO Voltage selection (3V3 / 5V) VCC_IO 5V R802 3V3 0R R807 For debug VBUS_USB_MASTER R80 VBUS NP 9 0 VSS RESET# DCD# VSS VCC_IO 8 GND CTS# R805 0R VCC3O 7 2 VSS 3V3OUT CBUS4 R80 0K USBDM_DONGLE 6 3 USBDM CBUS2 R808 0R USBDP_DONGLE 5 4 USBDP CBUS3 FT232R VSS VSS VSS VBUS VSS J80 USB_VCC USBDM USBDP USB_GND SHELL SHELL2 J SHELL SHELL2 7 8 SHELL3 SHELL4 R804 0R VBUS USBDP 3 USBDM 2 GND 4 VBUS External NP Power Supply Connector R803 U80 VBUS_USB_MASTER L800 TXD 330R 28 TXD OSCO VCC_IO 20R 27 2 C802 OSCI DTR# C806 C80 VSS 0NF UF 00NF TEST RTS# C VCCIO 4 00NF AGND VSS VSS VSS 24 NC2 RXD 5 VSS R806 D800 USBLC6-2SC RXD CBUS0 RI# 6 330R I/O#6 I/O# 22 7 CBUS GND 5 VBUS GND VSS GND2 NC 4 3 R809 I/O2#4 I/O2# K VCC5I DSR# C804 C805 C803 47PF 47PF 00NF UM230 - Rev 2 page 46/7

47 Bill of materials 7 Bill of materials Table 6. STEVAL-ISB044V bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 2 C00, C4 NP, 0603 capacitors Any C_NP_ C0, C03 0 µf, 25 V, 206, ±20% capacitors Wurth Elektronik C02 NP, 20 capacitor Any C_NP_ C04, C08, C22, C507 0 NF, 50 V, 0402, ±5% capacitors Any 0NF_50V_X7R_ C06, C204, C208, C27 22 µf, 25 V, 20, ±20% capacitors Wurth Elektronik C07, C0, C5, C306, C500, C50, C502, C NF, 25 V,0402, ±5% capacitors Any 00NF_25V_X5R_ C09, C6, C200, C2 NP, 0402 capacitors Any C_NP_ C 0 µf, 0 V, 0805, ±0% capacitor Murata GRM2BR7A06KE5L 9 4 C2, C3, C50, C52 00 NF, 50 V, 0402, ±5% capacitors Any 00NF_50V_X5R_ C7 NP, 0603 capacitor Murata GRM88R6E05KA2J C NF, 50 V, 0603, ±5% capacitor Murata GRM88R7H04KA93D 2 2 C203, C207 0 µf, 50 V, 206, ±0% capacitors Any 0UF_50V_X5R_206 3 C µf, 35 V, ±20% Aluminium capacitor Panasonic EEEFTV0AP 4 C NF, 50 V, 0402, ±5% capacitor Any 5.6NF_50V_X7R_ C209 NF, 50 V, 0402, ±5% capacitor Any NF_50V_X5R_ C23 0 PF, 50 V, 0402, ±5% capacitor Any 0PF_50V_X7R_ C24,C NF, 35 V, 0603, ±5% capacitors Any 220NF_35V_X7R_ C26 470pF, 50V,5% capacitor Any 470pF_50V_COG_ C300, C30, C302, C NF, 00 V, 206, ±5% capacitors TDK C326C0G2A473J5AC 20 C303 NF, 50 V, 0603, ±5% capacitor Any NF_50V_X5R_ C305 0 µf, 6.3 V, 0805, ±5% capacitor Any 0UF_6V3_X5R_ C307, C NF, 50 V, 0402, ±5% capacitors Any 22NF_50V_X7R_0402 UM230 - Rev 2 page 47/7

48 Bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 23 C PF, 50 V, 0402, ±5% capacitor Any 470PF_50V_X7R_ C NF, 25 V, 206, ±5% capacitor Any 470NF_25V_X7R_ C30.5 NF, 50 V, 0402, ±0% capacitor Any.5NF_50V_X7R_ C400 0 NF, 00 V, 0805, ±5% capacitor TDK C202C0G2A03J25AA 27 C40 22 NF, 00 V, 20, ±5% capacitor TDK C3225C0G2A223J60AA 28 C PF, 50 V, 0402, ±5% capacitor Any 00PF_50V_COG_ C403, C53 22 PF, 50 V, 0402, ±5% Cer,402 Any 22PF_50V_COG_ C NF, 50 V, 0402, ±5% capacitor Any 4.7NF_50V_X7R_ C NF, 50V,0% capacitor Any 220NF_50V_X7R_ C NF, 00 V, 0603, ±0% capacitor TDK CGA3E2X7R2A472K080 AA 33 C503 µf, 6 V, ±0% capacitor Any UF_6V_X5R_ C504, C506 NF, 00 V, 0402, ±5% capacitors Any NF_00V_X7R_ C µf, 25 V, 0402, ±0% capacitor Any 2.2UF_25V_X5R_ C5 220 PF, 50 V, 0402, ±5% capacitor Any 220PF_50V_X7R_ C NF, 50 V, 0402, ±5% capacitor Any 2.2NF_50V_X7R_ C80, C803, C NF, 50 V, 0603, ±5% capacitors Any 00NF_50V_X7R_ C802 0 NF, 50 V, 0603, ±5% capacitor Any 0NF_50V_X7R_ C804, C PF, 25 V, 0603, ±5% capacitors Any 47PF_25V_X5R_ C806 0 µf, 25 V, 0805, ±0% capacitor Any 0UF_25V_X7R_ D00 SMM4F3A TVS ST SMM4F3A-TR 43 D20 STPS8L30DEE Power Schottky rectifier ST STPS8L30DEE-TR 44 D V Zener, SOD323 NXP BZX384-C4V3-AK 45 D WS Diode, SOD323 Any Any 46 D400 MMBD503A Diode, SOT23 Fairchild MMBD503A 47 2 D500, D508 BAS52-7 Diode, DIOD_SOD523 Any Any 48 2 D50, D504 BAV99W Diode, SOT323 NXP BAV99W 49 D506 GREEN LED, L3.2_W2.5_H Wurth Elektronic 5524VS73200 UM230 - Rev 2 page 48/7

49 Bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 50 D507 RED LED, L3.2_W2.5_H Wurth Elektronic 5524RS D509 RB520S Schottky, SOD523 Rohm RB520S 52 D800 USBLC6-2SC6Y Automotive very low capacitance ESD protection ST USBLC6-2SC6Y 53 J00 PJ-002A Jack CUI PJ-002A 54 J Header Wurth Elektronic J Header Te Connectivity J50, J E+ USB Wurth Elektronic J USB Molex J USB Wurth Elektronic L0 2.2 µh, 3.8 A, ±20% Inductor, L5_W5_H4 Wurth Elektronic L02 NP Inductor, L2.5_W2.0_H. 0 Wurth Elektronic L µh, 7 A, ±20% Inductor, L0_W0_H5 Wurth Elektronic L50, L L800 K, 0.2 A, ±25% 20 R, 0.5 A, ±25% Ferrite, 402 Murata BLM5AG02SND Ferrite, 603 Wurth Elektronic M300 2 µh, 8 A Inductor, Wurth Elektronic M600, M60, M602, M603 M320 KRSTMCZ00- Screw Duratool M320 KRSTMCZ M604, M605, M606, M607 D0475 Spacer Duratool D M608, M609, M60, M6 HTSB- M Spacer Richco HTSB-M M69 69 M620 PCB WE - 2 layers SPACER_3MM_ MP_A6-A2,, PCB Any Any Cover Any Any 70 Q202 NPN-PNP CMS, SOT363 OnSemiconducto rs MMDT Q203, Q303, Q304 N-MOS N-channel Power MOSFET ST STL0N3LLH Q30, Q400, Q700 NPN-NPN CMS, SOT363 OnSemiconducto rs BC847CDWTG 73 Q302 NPN CMS, SOT23 74 Q500 NPN-PNP CMS, SOT363 Diodes Incorporated OnSemiconducto rs BC F BC847BPDWTG 75 2 R00, R R0 220 K, /6 W, ±% 8 K, /6 W, ±% Resistors Any Any Resistor Any Any UM230 - Rev 2 page 49/7

50 Bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 77 R04 78 R K, /6 W, ±% 20 K, /6 W, ±5% Resistor Any Any Resistor Any Any 79 R07 NP Resistor Any Any 80 3 R08, R20, R705 NP Resistors Any Any 8 2 R09,R24 0 R, /6 W, ±5% Resistors Any Any 82 3 R200,R70, R706 0 R, /6 W, ±5% Resistors Vishay 0R_5%_ R202, R309, R525 K, /6 W, ±% Resistors Any Any 84 2 R204, R R R R207, R22 88 R R, /6 W, ±% R, W, ±% 47 R, /6 W, ±5% 3.3 K, /6 W, ±% 75 K, /6 W, ±% Resistors Any Any Resistor Te Connectivity TLM3ADR068FTE Resistor Any Any Resistors Any Any Resistor Any Any 89 3 R20, R2, R308 0 K, /6 W, ±% Resistors Any Any 90 R K, /6 W, ±% Resistor Any Any 9 8 R25, R503, R5, R53, R527, R528, R700, R K, /6 W, ±5% Resistors Any Any 92 2 R300, R R, /6 W, ±% Resistors Any Any 93 3 R302, R408, R52 M, /6 W, ±% Resistors Any Any 94 5 R303, R406, R409, R506, R58 00 K, /6 W, ±% Resistors Any Any 95 5 R304, R305, R306, R403, R K, /6 W, ±% Resistors Any Any 96 R R40, R4 98 R R405, R R407, R R, W, ± K, /6 W, ±% 50 K, /6 W, ±% 22 K, /6 W, ±% 47 K, /6 W, ±% Resistor Any Any Resistors Any Any Resistor Any Any Resistors Any Any Resistors Any Any UM230 - Rev 2 page 50/7

51 Bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 0 R K, /6 W, ±5% Resistor Any Any 02 3 R502, R504, R505 0 K, /6 W, ±5% Resistors Any Any 03 R R R52, R54 06 R K, /6 W, ±% 80 K, /6 W, ±% 220 R, /6 W, ±5% 00 R, /0 W, ±5% Resistor Any Any Resistor Any Any Resistors Any Any Resistor Any Any 07 R56 47 K, ±% Resistor Murata NCP5WB473F03RC 08 R57 09 R520 0 R526 M, /6 W, ±5% 330 R, /6 W, ±5% K, /6 W, ±5% Resistor Any Any Resistor Any Any Resistor Any Any 3 R529, R530, R K, /6 W, ±% Resistors Any Any 2 R702 3 R K, /6 W, ±% 39 K, /6 W, ±5% Resistor Any Any Resistor Any Any 4 2 R80, R807 NP Resistors Any Any 5 4 R802, R804, R805, R808 0 R, /0 W, ±5% Resistors Any Any 6 2 R803, R R809, R R, /0 W, ±5% 0 K, /0 W, ±5% Resistors Any Any Resistors Any Any TP00, TP0, TP304, TP305 TP02, TP200, TP506, TP507, TP508, TP509, TP50, TP5 TP03, TP30, TP302, TP303, TP400, TP50, TP502, TP503, TP504 WIRE_SOLDER Test point Any Any 500 Test point Keystone 500 TPSMD-MM Test point Any Any 2 U00 LDK320M-R Low drop voltage regulator ST LDK320M-R 22 U0 NP Step-down monolithic switching regulator ST L U300 MCP4700 Driver, DFN8_L3_W3 Microchip MCP4700_DFN8 UM230 - Rev 2 page 5/7

52 Bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 24 U500 STWBC_EP Digital controller for wireless battery charger transmitters ST STWBC-EP 25 U50 TSV52ICT CMOS op-amps ST TSV52ICT 26 U80 FT232R Converter, SSOP28 FTDI FT232R UM230 - Rev 2 page 52/7

53 Board assembly and layout 8 Board assembly and layout The STEVAL-ISB044V 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. 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 UM230 - Rev 2 page 53/7

54 Power signals (BOOST, GND, LC) 8. Power signals (BOOST, GND, LC) 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) UM230 - Rev 2 page 54/7

55 Power signals (BOOST, GND, LC) Figure 58. STEVAL-ISB044V evaluation board: ground plan Full GND plan on Layer 2 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 (>2 mm) to handle high current. UM230 - Rev 2 page 55/7

56 UM230 Power signals (BOOST, GND, LC) Figure 59. STEVAL-ISB044V evaluation board: DC-DC boost routing details VIN Net VIN R200 C27 22 µf Net L200 D20-QQ203 L µh TP200 0R R24 C26 4 Q203 N-MOS STL0N3LLH5 C200 NP 0R 470pF D20 STPS8L30DEE Net D20-C205 C207 C202 C206 00NF 5.6NF 0 µf VDCDC C203 C204 0 µf 22 µf C µf + C µf Net Q203 R205 R202 K C209 NF DEMAGNET R R R R R25 00K D V UM230 - Rev 2 page 56/7

57 UM230 Power signals (BOOST, GND, LC) Figure 60. STEVAL-ISB044V evaluation board: power GND routing details VIN USB_VCC_QC 4 R200 0 R GND from R205 and C27: high current A lot of vias ONLY in this area C27 22 µf 4 Q203N-MOS STL0N3LLH5 PJ-002A J00 TP00 2 V DC WIRE_SOLDER J0 2 SMM4F3A GND directly connected to TP0 and Capa connect bottom side with a lot of vias D00 C00 NP C2 00NF C0 0 µf C4 NP C02 NP R R 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 TP303 VRSENSE R R C207 C202 C206 00NF 5.6NF 0 µf TP200 VDCDC C203 C204 C208 0 µf 22 µf 22 µf + C µf C300 47NF GND from R307: connected near GND from " GND VBOOST" TP302 Direct GND line connection POWER_NODE C30 47NF C302 47NF C304 47NF Bridge nets are designed on the top layer; traces must be very large(>2 mm). UM230 - Rev 2 page 57/7

58 Power signals (BOOST, GND, LC) Figure 6. STEVAL-ISB044V evaluation board: bridge node routing details Net VDCDC-Q303 VDCDC VDCDC Q303 N-MOS STL0N3LLH5 PWM_QFOD D WS Q304 N-MOS STL0N3LLH5 C30.5NF R309 K TP304 WIRE_SOLDER POWER_NODE C300 C30 47NF 47NF M Q302 NPN 2 µh 2 3 TP305 WIRE_SOLDER BRIDGE_NODE C302 47NF C303 NF Net bridge node Net power node C304 47NF Net GND UM230 - Rev 2 page 58/7

59 EMI components Figure 62. STEVAL-ISB044V evaluation board: shunt resistor routing details Q304 N-MOS STL0N3LLH C303 NF VRSENSE trace between Q304 and R307 must be very short TP303 VRSENSE R R TP302 Direct GND line connection GND -R307 connected directed to GND - VBOOST 8.2 EMI components Figure 63. STEVAL-ISB044V evaluation board: EMI components ( of 2) R24 0R R24 and C26 very close to D20 D20 C26 470pF VDCDC TP200 C202 and C206 near C205 VDCDC and C205 GND STPS8L30DEE C202 00NF C NF C207 0 µf C203 0 µf C µf C µf + C µf R202 K C202 R24 - C26 C206 UM230 - Rev 2 page 59/7

60 EMI components capacitors (C00, C0, C03, C2, 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 (2 of 2) USB_VCC_QC J0 TP00 WIRE_SOLDER 2 V DC 3 2 L0 2.2 µh PJ-002A J SMM4F3A D00 C00 NP C2 00NF C0 0 µf C4 NP C02 NP C03 0 µf TP0 WIRE_SOLDER UM230 - Rev 2 page 60/7

61 STWBC-EP layout 8.3 STWBC-EP layout Figure 65. STWBC-EP digital controller layout L50 K C50-L50 near VDDA (pin3) C50 00NF VDD 29 VDDA 3 DEMAGNET SYMBOL_DETECT C03 C503-C502-L502 near VDD (pin29) L50 C50 C503 L502 C2 C502 C00 R505 L502 K R505 0K STWBC-EP Digital controller C502 00NF C503 UF 3 VOUT VDD 29 R505 near Reset (pin 28) SWIM RESET SWIM NRST DCDC_DRV DCDC_DAC 2 24 DCDC_DRV DCDC_DAC UM230 - Rev 2 page 6/7

62 UM230 Current sensing and demodulation 8.4 Current sensing and demodulation Figure 66. STEVAL-ISB044V evaluation board: current sensing VDD_STWBC R302 M IDEMOD R303 00K TP30 R K ISENSE VRSENSE R R C PF R K R K C307 22NF Direct GND line connection R308 0K Q30 NPN-NPN C307 near Isense input (pin 9) Current amplifier (Q30, R and C) near VRSENSE Warning: R308 GND is done through a trace connected to GND on Rsense R307 Don't mix this track with ground plane C307 Q30 R308 UM230 - Rev 2 page 62/7

63 UM230 Current sensing and demodulation Figure 67. STEVAL-ISB044V evaluation board: current demodulation C µf VDD_STWBC VDD_STWBC C509 IDEMOD R57 M U50 +IN + 2 V- 3 -IN - TSV52ICT V+ 5 OUT 4 00NF C50 00NF R58 00K CURRENT_DEMOD R59 TP508 C50, R58, R59 near Current_demod input (U500 pin 2) C5 22K C53 22PF C52 00NF 220PF D504 2 R R 3 BAV99W C50 R59 R58 CURRENT_DEMOD 2 Current demod (U50, R and C) near Current amplifier output (Q30) CURRENT_DEMOD TANK_VOLTAGE 5 TANK_VOLTAGE 6 VTARGET QFOD_ADC 7 COIL_TEMP 8 ISENSE 9 VMAIN 20 VTARGET QFOD_ADC ISENSE VBUS C53 Q30 U50 Q30 C503 C53 L50 R57 C503 R308 U50 C52 C5 L502 C50 R308 L502 C2C502 R57 C502 C52 C5 R505 R505 C2 Q30C00 Q30C00 UM230 - Rev 2 page 63/7

64 References 9 References Freely available on STWBC-EP datasheet 2. STEVAL-ISB044V data brief (DB3408): "Qi MP-A0 5 W wireless charger TX evaluation kit based on STWBC-EP" 3. STSW-ISB044FW data brief (DB3409): "Firmware for the STEVAL-ISB044V wireless power transmitter evaluation board based on STBWC-EP" 4. STSW-STWBCFWDT data brief (DB340): "STWBC firmware downloader tool" 5. STSW-STWBCGUI data brief (DB348): "Graphical user interface for wireless power transmitter evaluation boards based on the STWBC chip family" UM230 - Rev 2 page 64/7

65 Revision history Table 7. Document revision history Date Version Changes 30-Oct-207 Initial release. 4-May Updated Figure 4. STEVAL-ISB044V evaluation board: power supply selection and Section 7 Bill of materials. UM230 - Rev 2 page 65/7

66 Contents Contents Getting started...2. System requirements Package contents 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 STVP file creation Firmware download with STVP 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...36 UM230 - Rev 2 page 66/7

67 Contents 5.3 Efficiency Stand-by consumption Schematic diagram Bill of materials Board assembly and layout Power signals (BOOST, GND, LC) EMI components STWBC-EP layout Current sensing and demodulation References...64 Revision history...65 UM230 - Rev 2 page 67/7

68 List of figures List of figures Figure. STEVAL-ISB044V evaluation board.... Figure 2. STWBC-EP block diagram...3 Figure 3. STEVAL-ISB044V evaluation board: connectors, LEDs and test points... 5 Figure 4. STEVAL-ISB044V evaluation board: power supply selection... 6 Figure 5. STWBC-EP pinout in MP-A0 configuration...7 Figure 6. STSW-STWBCGUI installation file...9 Figure 7. Windows Device Manager: COM port selection Figure 8. STSW-STWBCGUI start screen... 0 Figure 9. Dongle connection... Figure 0. Firmware download via STSW-STWBCGUI... 2 Figure. Firmware file selection message... 2 Figure 2. Firmware file selection... 3 Figure 3. Power on message... 3 Figure 4. USB-to-UART dongle to STEVAL-ISB044V connection... 4 Figure 5. DOS window: download in progress... 4 Figure 6. STVP configuration... 5 Figure 7. STEVAL-ISB044V evaluation board: ST-LINK connection Figure 8. STVP core selection... 6 Figure 9. STVP download... 6 Figure 20. STVP wrong device selected alert Figure 2. STVP incompatibility device action query... 7 Figure 22. STSW-STWBCGUI command line Figure 23. STSW-STWBCGUI command line with blank chip Figure 24. STSW-STWBCGUI: convert CAB to STVP files... 9 Figure 25. Selecting the CAB file to be converted Figure 26. STVP project file name Figure 27. STVP files created... 2 Figure 28. STVP file selection Figure 29. STEVAL-ISB044V evaluation board: test setup configuration Figure 30. STEVAL-ISB044V evaluation board: external power supply connection Figure 3. STEVAL-ISB044V evaluation board: USB charger connection Figure 32. STEVAL-ISB044V evaluation board: UART connection Figure 33. STSW-STWBCGUI: object detected and charge in progress Figure 34. STSW-STWBCGUI: Qi protocol window Figure 35. STSW-STWBCGUI: Qi monitor window Figure 36. STSW-STWBCGUI: Parameters window Figure 37. STSW-STWBCGUI: modified parameters Figure 38. STSW-STWBCGUI: saving modified parameters (Dump to bin) Figure 39. STSW-STWBCGUI: bin file backup Figure 40. STSW-STWBCGUI: CAB file patch button Figure 4. STSW-STWBCGUI: start auto-calibration Figure 42. STSW-STWBCGUI: presence detection test Figure 43. STSW-STWBCGUI: test result Figure 44. STSW-STWBCGUI: QFOD test Figure 45. STSW-STWBCGUI: QFOD test result Figure 46. Efficiency setup Figure 47. STEVAL-ISB044V evaluation board: efficiency performance with MPB Rx Figure 48. STEVAL-ISB044V circuit schematic ( of 8) Figure 49. STEVAL-ISB044V circuit schematic (2 of 8)... 4 Figure 50. STEVAL-ISB044V circuit schematic (3 of 8) Figure 5. STEVAL-ISB044V circuit schematic (4 of 8) Figure 52. STEVAL-ISB044V circuit schematic (5 of 8) UM230 - Rev 2 page 68/7

69 List of figures Figure 53. STEVAL-ISB044V circuit schematic (6 of 8) Figure 54. STEVAL-ISB044V circuit schematic (7 of 8) 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 Figure 62. STEVAL-ISB044V evaluation board: shunt resistor routing details Figure 63. STEVAL-ISB044V evaluation board: EMI components ( of 2) Figure 64. STEVAL-ISB044V evaluation board: EMI components (2 of 2) Figure 65. STWBC-EP digital controller layout... 6 Figure 66. STEVAL-ISB044V evaluation board: current sensing Figure 67. STEVAL-ISB044V evaluation board: current demodulation UM230 - Rev 2 page 69/7

70 List of tables List of tables Table. STEVAL-ISB044V electrical performance: input characteristics... 4 Table 2. STEVAL-ISB044V electrical performance: system characteristics... 4 Table 3. Connector description....6 Table 4. Test point description...6 Table 5. STWBC-EP pin description...8 Table 6. STEVAL-ISB044V bill of materials Table 7. Document revision history UM230 - Rev 2 page 70/7

71 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. 208 STMicroelectronics All rights reserved UM230 - Rev 2 page 7/7