user manual - um2301 - getting started with the qi … quick charge usb connector table 4. test...

IntroductionThe STEVAL-ISB044V1 wireless power transmitter evaluation board is based on the MP-A10 (CR419) wireless powerconsortium (WPC) standard version 1.2.3 and supports FOD (foreign object detection).

The transmitter supports all Qi-compatible receivers (such as those in Qi- enabled mobile phones) as well as resistive orcapacitive modulation receivers.

In accordance with the Qi-MPA10 topology, the STEVAL-ISB044V1 supports a 5-13 V input voltage and a half-bridge stage withbridge voltage/frequency control.

The evaluation board is based on the STWBC- EP controller which integrates all the functions required to drive and monitor thetransmitter, and controls the bridge voltage built in boost topology.

The STWBC-EP supports UART connectivity to a PC and, thanks to the STEVAL-ISB044V1 graphical interface, monitors thetransmitter behavior in real-time.

The STEVAL-ISB044V1 reference design provides a complete kit which includes the STWBC-EP, firmware, layout based oncost- effective 2-layer PCB, graphical interfaces and tools.

Figure 1. STEVAL-ISB044V1 evaluation board

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

UM2301

User manual

UM2301 - Rev 2 - May 2018For further information contact your local STMicroelectronics sales office.

www.st.com

http://www.st.com/en/product/steval-isb044v1

http://www.st.com/en/product/stwbc-ep

1 Getting started

1.1 System requirementsTo use the STEVAL-ISB044V1 evaluation board with the graphical user interface (GUI), you need:• a PC with Microsoft® Windows ® operating system (XP or later versions)• NET Framework 4• a USB-to-UART cable to connect the board to the PC.

1.2 Package contents• Hardware:

– a STEVAL-ISB044V1 evaluation board– ST-LINK/V2 in-circuit debugger/programmer with single wire interface module (SWIM), available for

download on www.st.com– 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 www.st.com)– FTDI VCP driver (http://www.ftdichip.com/Drivers/VCP.htm)– PC GUI installation package

UM2301Getting started

UM2301 - Rev 2 page 2/71

http://www.st.com/

http://www.st.com/

http://www.ftdichip.com/Drivers/VCP.htm

2 Hardware description and setup

2.1 System block diagram

Figure 2. STWBC-EP block diagram

2.2 STEVAL-ISB044V1 wireless transmitter board overviewThe STEVAL-ISB044V1 evaluation board features:• STWBC-EP digital controller• 15 W output power• Qi MP-A10 reference design• WPC Qi1.2.3 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

UM2301Hardware description and setup

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• RoHS compliant

Table 1. STEVAL-ISB044V1 electrical performance: input characteristics

Parameter Inputcharacteristics Min. Typ. Max. Unit Notes and

conditions

Vin Input voltage 5 12 13 V

Iin Input current 1.6 2 AVin nominal,

Iout = max. onMP1B Rx

Input no-loadcurrent mA

Input stand-bycurrent 1.4 mA At typical

voltage

Table 2. STEVAL-ISB044V1 electrical performance: system characteristics

Parameter Input characteristics Min. Typ. Max. Unit Notes and conditions

Fs Switching frequency 110 180 kHz Decrease with load

Duty cycle Duty cycle modulation 5 50 % Duty cycle

ƞ Full load efficiency 80 % Vin= 12 V, P Out Rx = 15 W

UM2301STEVAL-ISB044V1 wireless transmitter board overview

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Figure 3. STEVAL-ISB044V1 evaluation board: connectors, LEDs and test points


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Figure 4. STEVAL-ISB044V1 evaluation board: power supply selection

Table 3. Connector description

Connector reference Description

J100 DC power jack connector

J101 Power/QC USB connector link

J500 SWIM connector used for the download

J501 UART jack connector used for the GUI

J700 Quick charge USB connector

Table 4. Test point description

Test point reference Signal Description

TP100 12 V 12 V power supply connection

TP101 GND GND power connection

TP102 VIN Input voltage

TP103 VDD_STWBC 4.5V LDO output voltage

TP200 VDCDC Boost output voltage

TP301 ISENSE Current measurement

TP302 GND Power GND connection (Rsense)

TP303 VRSENSE Rsense resistor voltage

TP304 Wireless charging coil connection


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Test point reference Signal Description

TP305 Wireless charging coil connection

TP400 SYMBOL_DETECT Symbol detector

TP501 I2C_SCL STWBC I²C signal

TP502 I2C_SDA STWBC I²C signal

TP503 USB_DP STWBC UART Rx signal

TP504 USB_DM STWBC UART Tx signal

TP506 GPIO_0 STWBC GPIO signal used for LEDs

TP507 GND Ground

TP508 CURRENT_DEMOD Symbol detector

TP509 QC_IO Quick charge circuit signal

TP510 GND Ground

TP511 GND Ground

2.3 STWBC-EP pinout and pin descriptionTheSTWBC-EP is a multifunction device that can support several wireless charging architectures.This section shows the STWBC-EP pinout when the MP-A10 configuration is used.

Figure 5. STWBC-EP pinout in MP-A10 configuration

UM2301STWBC-EP pinout and pin description

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Table 5. STWBC-EP pin description

Pin number Pin name Pin type Firmware description

1 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

10 DCDC_DAC_REF AI DAC reference value for Boost output voltage

11 WAVE_SNS AI Symbol detector based on delta frequency

12 CURRENT_DEMOD AI Current demodulation

13 VDDA PS Analog power supply

14 VSSA PS Analog ground

15 TANK_VOLTAGE AI Analog input to measure the LC voltage (power calculation)

16 VTARGET AI Boost voltage measurement

17 QFOD_ADC AI High sensitivity peak voltage detector used for Quality Factor measurement

18 COIL_TEMP AI Analog input for temperature measurement. The input is connected to externalNTC biased to VDD_STWBC

19 ISENSE AI Analog input to measure the current flowing into the power bridge

20 VMAIN AI Analog input to measure the main power supply

21 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

31 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 1.2 V.

UM2301STWBC-EP pinout and pin description

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3 Download procedure

To download the firmware to the board, the user has to install the GUI software which allows a complete boardmonitoring 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.

3.1 STSW-STWBCGUI software installation

Step 1. Install the GUI by launching the STWBC_GUI_Setup.msi installation file

Figure 6. STSW-STWBCGUI installation file

Step 2. Connect the wireless power transmitter board to the PC via the USB-to-UART connection on J501UART connector

Step 3. Check Windows Device Manager to identify the correct port number and select the appropriate USBserial 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.,“COM12” or the specific syntax “\\.\COM12”)If the GUI is switched off, ensure that the COM port is not used on your computer. Otherwise, tryanother USB port.

UM2301Download procedure

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Figure 8. STSW-STWBCGUI start screen

Step 5. Press “OK”.The GUI is ready to run.

3.2 Firmware download via STSW-STWBCGUIThe following sections describe the firmware download through the UART connector via STSW-STWBCGUI.The download contains 3 files incorporated in a single cabfile.

3.2.1 Download procedure with a new chip (never been programmed)If the chip has never been programmed, the download mode is enabled by default.

Step 1. Connect the USB-to-UART dongle to the computer.

Note: Do not connect the transmitter board for the moment.

UM2301Firmware download via STSW-STWBCGUI

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Figure 9. Dongle connection

Step 2. From the GUI, select Load FW to board from the setup menu.


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Figure 10. Firmware download via STSW-STWBCGUI

Step 3. As prompted, select the CAB file containing the firmware to download

Figure 11. Firmware file selection message


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Figure 12. Firmware file selection

Step 4. Supply the board with 12 V and keep it powered.

Figure 13. Power on message

Step 5. When the DOS window appears, connect the transmitter board to the dongle using a micro-USB cable.


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Important:Take care to connect it to the USB debug connector J501 on the opposite side of the power supply connection.

Figure 14. USB-to-UART dongle to STEVAL-ISB044V1 connection

Step 6. Follow the download progress in the DOS window and power off the board when prompted.

Figure 15. DOS window: download in progress

3.2.2 Firmware upgrade procedure (chip already programmed)If a chip has already been programmed with the firmware, the download mode is disabled and special commandneeds to be sent to STWBC-EP to enable the download mode.

Step 1. Supply the transmitter board via a power supply set to12 V.Step 2. Connect the USB-to-UART dongle to the transmitter board.


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Step 3. The STWBC-EP UART Rx/Tx signals are accessible on the transmitter board J501 connector,respectively on USB_DP and USB_DM (see Figure 14. USB-to-UART dongle to STEVAL-ISB044V1connection).

Step 4. From the STSW-STWBCGUI, select Load FW to board from the setup menu (see Figure10. Firmware download via STSW-STWBCGUI).

Step 5. As prompted, select the CAB file containing the firmware to download (see Figure 11. Firmware fileselection message).

Step 6. As prompted, power the board on and keep it powered.Step 7. Follow the download progress in the DOS window and power the board off when prompted (see Figure

15. DOS window: download in progress).In case of problems in downloading the firmware through UART (for example, firmware corruptionduring update), refer to the following section.

3.3 Erasing firmware procedure using STVP

3.3.1 RequirementsTo start the firmware erasing procedure using STVP, you have to install on your PC:• ST-LINK USB driver• STVP programming tool (available at www.st.com)• ST-LINK hardware tools

You also need to configure STVP as shown below.

Figure 16. STVP configuration

UM2301Erasing firmware procedure using STVP

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3.3.2 Procedure

Step 1. Power the target off.Step 2. Power the target on.Step 3. Connect ST-LINK circuit to the PC via USB.Step 4. 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 17. STEVAL-ISB044V1 evaluation board: ST-LINK connection

Step 5. Launch STVP software.Step 6. Select STM8AF6166 as core.

Figure 18. STVP core selection

Note: Do not upload any program into the STVP RAM area, as all bits will be erased (load 00 00 00).Step 7. Transfer the ”00 00” to the STWBC-EP via the SWIM interface using the appropriate push button.

Figure 19. STVP download

Step 8. Click OK if a “wrong device selected” alert appears.

UM2301Erasing firmware procedure using STVP

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Figure 20. STVP wrong device selected alert

Step 9. Click YES if “An incompatibility has been found with this device” alert appears.

Figure 21. STVP incompatibility device action query

After this operation, the programming procedure starts. At completion, the STVP informs the user thatthe program is loaded and verified.

< PROGRAM MEMORY programming completed.> Verifying PROGRAM MEMORY area...< PROGRAM MEMORY successfully verified.

Step 10. Exit from the STVP program.Step 11. Disconnect SWIM.Step 12. Remove power supply from the STEVAL-ISB044V1 transmitter board.Step 13. Retry the UART download procedure if necessary.

3.4 Firmware download with command line

3.4.1 Firmware download with written chipStep 1. Ensure a dedicated directory has the following files:

– STWBC_Loader.exe– stwbc_loader_not_empty.bat– enable_boot.bin– “firmware version“.cab

Step 2. Starting from the STSW-STWBCGUI folder, run the stwbc_loader_not_empty.bat from the commandline, specifying the COM number (e.g. COM2) and firmware filename parameters (“firmwarename.cab”).

UM2301Firmware download with command line

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Figure 22. STSW-STWBCGUI command line

3.4.2 Firmware download with blank chipIf the STWBC-EP memory is erased, the procedure sequence is a bit different.

Step 1. Connect the UART cable to the board.Step 2. Select Load FW to board from the STSW-STWBCGUI and power the board.Step 3. Execute the command line as per the example below with the appropriate firmware filename.

Figure 23. STSW-STWBCGUI command line with blank chip

Note: If the COM port is > COM8, the user has to use the syntax \\.\COMxwhere COMx is the COM port number.

Note: A dedicated tool is available for simultaneous downloads (refer to the STSW-STWBCFWDT firmwaredownloader tool).

3.5 STVP file creationTo use the STVP to download, you must generate new files from the *.cab. The existing GUI gives you thispossibility.

Step 1. Select the convert CAB to STVP files command from the STSW-STWBCGUI setup menu

UM2301STVP file creation

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Figure 24. STSW-STWBCGUI: convert CAB to STVP files

Step 2. Follow the prompt to select the appropriate cabfile.


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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.


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Figure 27. STVP files created

Step 4.

3.6 Firmware download with STVP

Step 1. Power the target off.Step 2. Power the target on.Step 3. Connect ST-LINK circuit to the PC via USB.Step 4. 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 Figure17. STEVAL-ISB044V1 evaluation board: ST-LINK connection.Step 5. Launch STVP software.Step 6. Select STM8AF6166 as core (see Figure 18. STVP core selection).Step 7. In STVP, open the Project menu and click Open.Step 8. Select the .stp given in the zip file.

UM2301Firmware download with STVP

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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 0x1D1205

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 10. In STVP, open the Program menu and select All tabs (on active sectors, if any)Step 11. Click OK if a “wrong device selected” alert appears (see Figure 20. STVP wrong device selected alert).Step 12. Click YES if “An incompatibility has been found with this device” alert appears (see Figure 21. STVP

incompatibility device action query).After this operation, the programming procedure starts. At completion, the STVP informs the user thatthe program is loaded and verified.

< PROGRAM MEMORY programming completed.> Verifying PROGRAM MEMORY area...< PROGRAM MEMORY successfully verified.

Step 13. Exit from the STVP program.Step 14. Disconnect SWIM.Step 15. Remove power supply from the STEVAL-ISB044V1 transmitter board.


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The IAR toolchain can be installed also for firmware compilation and download.


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4 Evaluation equipment setup

Figure 29. STEVAL-ISB044V1 evaluation board: test setup configuration

The board is powered via an external power supply or a USB charger. An electronic load is connected to thereceiver output to load up to 15 W.On the basis of measurements, voltmeters and ammeters measure input/output voltage and current.

4.1 External power supplyThe power supply is set to 12 V/2 A for EPP mode and 5 V/2 A for BPP mode.The board is connected to the external power suplly through wires.The jumper has to be set to select the jack/external power supply input.

Figure 30. STEVAL-ISB044V1 evaluation board: external power supply connection

UM2301Evaluation equipment setup

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4.2 USB chargerThe board can be supplied by a USB charger. The jumper J101 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 AUSB 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 12V on Vbus. This enables to support EPP mode.To provide 15 W on the receiver side and considering the system efficiency, a 24 W Quick Charge wall chargershould 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 AWGUSB cable must be used.

Figure 31. STEVAL-ISB044V1 evaluation board: USB charger connection

4.3 UART configurationThe STSW-STWBCGUI is installed on the PC connected to the board via the USB-to-UART cable (connected onthe board J501 USB debug connector).

UM2301USB charger

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Important:This UART connection is mandatory for parameter settings and debug of the board which is using the STSW-STWBCGUI.

Figure 32. STEVAL-ISB044V1 evaluation board: UART connection

UM2301UART configuration

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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 systemdebugging.

UM2301GUI and evaluation procedure

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Figure 34. STSW-STWBCGUI: Qi protocol window

You can also monitor STWBC-EP internal variables such as bridge voltage and frequency, Rx reported power, coiltemperature, etc.


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Figure 35. STSW-STWBCGUI: Qi monitor window

The GUI user-friendly interface allows efficient system adjustment (thresholds, regulation error) and lets you storeparameters to and load parameters from your computer.The parameters have the following levels of protection:• Level 0: parameters can be modified without protection• Level 1: more critical parameters to be modified with caution. You must click the Unlock param button

before modifying it, with caution, as it can lead to system malfunction or trigger unexpected behaviorincompatible with Qi standard.


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Figure 36. STSW-STWBCGUI: Parameters window

Parameters can be modified and their effect can be tested immediately by clicking Push to target; modifiedparameters lose their highlighted background.


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Figure 37. STSW-STWBCGUI: modified parameters

The GUI embeds the STSW-STWBCFWDT downloader interface (which uses UART connection) and includestools to generate binary files with adjusted parameters and to build new firmware packages incorporating thesefiles.Through the GUI, you can change the parameters and produce a new cab to program a batch of new boards. Tothis aim, dump the parameters into a bin file, but only after clicking the Push to target button.


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Figure 38. STSW-STWBCGUI: saving modified parameters (Dump to bin)


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Figure 39. STSW-STWBCGUI: bin file backup

You can then select Modify parameters in CAB file from the setup menu and select the appropriate firmwareCAB file to be patched. This operation will alter the firmware file with new tuning parameters, which can besubsequently loaded using the standard procedure.


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Figure 40. STSW-STWBCGUI: CAB file patch button

5.1 Status LEDsThe 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.

UM2301Status LEDs

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• 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, sometypes of end power transfer or no response error code)

5.2 Test procedure for board calibrationThere 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 41. STSW-STWBCGUI: start auto-calibration

Note: This calibration should be done only once after each new firmware download, with NO Receiver placed on thetransmitter.You must first calibrate the presence detection and then the QFOD.

5.2.1 Presence detection calibration procedure

Step 1. Set the test number to 1Step 2. Click the Start button

UM2301Test procedure for board calibration

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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 testwindow the status is Test Done.

Figure 43. STSW-STWBCGUI: test result

Step 3. Start the test again if the returned status is different.

5.2.2 QFOD calibration procedure


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Step 1. Set the test number to 2Step 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 testwindow the status is Test Done.

Figure 45. STSW-STWBCGUI: QFOD test result


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Step 3. Start the test again if the returned status is different.

5.3 EfficiencyEfficiency measurements are performed on a Qi certification tester.The STEVAL-ISB044V1 transmitter is supplied by 12 V/2 A and the receiver voltage level is 12 V (MP1B).POUT is the output power actually measured at the receiver output (not only at the rectifier output) and PIN is theinput 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=POUT/PIN).

Figure 47. STEVAL-ISB044V1 evaluation board: efficiency performance with MP1B Rx

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5.4 Stand-by consumptionIn stand-by, when the board is supplied at 12 V, very low power consumption is achieved.In this mode, device detection is still ensured; power consumption is reduced down to 1.4 mA average.

UM2301Efficiency

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The STEVAL-ISB044V1 evaluation board has a low stand-by power of only 17 mW.To measure this low power consumption, the UART cable must be unplugged.

UM2301Stand-by consumption

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6 Schematic diagram

Figure 48. STEVAL-ISB044V1 circuit schematic (1 of 8)

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UM2301Schematic diagrams

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UM2301 - Rev 2 page 41/71


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ISEN

SE

IDEM

OD

PWM

_QFO

D

C30

722

NF

C30

047

NF

R30

4

470K

R30

91K

TP30

4W

IRE_

SOLD

ER

1

C30

31N

F

R30

647

0KR

305

470K

C31

01.

5NF

C30

147

NF

U30

0

MC

P147

00

GN

D4

PWM

HI

2

LOW

DR

V5

PWM

LO3

VCC

6

PHAS

E1

HIG

HD

RV

8

BOO

T7

TH9

C30

610

0NF

R30

04.

7R

TP30

2

1

C30

447

NF

D30

041

48W

S

C30

9

470N

F

R30

14.

7RQ

304

N-M

OS

STL1

0N3L

LH5

5

4

1678

23

R30

310

0K

Q30

3N

-MO

SST

L10N

3LLH

5

5

4

1678

23

TP30

3

1

TP30

5W

IRE_

SOLD

ER

1

Q30

2N

PN1

23

Q30

1N

PN-N

PN

2

3

1

4

5

6

M30

0

C30

247

NF

C30

510

µF

R30

810

K

R30

70.

022R

TP30

1

1

R30

21M

C30

847

0PF

BRID

GE_

NO

DE

HVG

LVG

VRSE

NSE

12 µ

H


UM2301 - Rev 2 page 42/71


VDD_STWBC

SYMBOL_DETECT

POWER_NODE

R401

82K

R40747K

R41182K

Q400NPN-NPN

23 1

4 5 6

R400

470R D400

3

1 2

C406

4.7NF

C40122NF

R4081M

R4102.2K

R402

150K

R409

100K

C404

4.7NF

C402100PF

R406

100K

C405220NF

R40522K

C400

10NF

R404470K

TP400

1

C40322PF

R403470K


UM2301 - Rev 2 page 43/71


STW

BC-E

PD

igita

l con

trolle

r

Layo

ut n

ote

: GN

D re

fere

nce

of th

e O

pAm

p in

puts

hav

e to

be

conn

ecte

d in

star

gro

und

conn

ectio

n w

ith th

e G

ND

plan

of t

he p

ower

brid

ge.

USB

for

UART

Deb

ugFO

R DE

BUG

VDD

_STW

BC

VDD

_STW

BC

VDD

_STW

BC

VDD

_STW

BCVD

D_S

TWBC

VDD

_STW

BC

VDD

_STW

BC

VDD

_STW

BC

VDD

_STW

BC

VBU

S

DN

BL

ISEN

SE

UPB

LC

MP_

OU

T_V

CS_

CM

P

DEM

AGN

ET

DC

DC

_DAC

DC

DC

_DR

V

VTAR

GET

QFO

D_A

DC

DC

DC

_DAC

_REF

IDEM

OD

SYM

BOL_

DET

ECT

POW

ER_N

OD

E

POW

ER_N

OD

E

QC

_IO

QFO

D_A

DC

DN

BL

PWM

_QFO

D

POW

ER_N

OD

E

R52

247

K

D50

0

BAS5

21-7

TP51

0

1

TP50

9 1

C50

1

100N

F

R51

310

0K

R52

6

1KC

514

2.2N

F

C51

1

220P

F

D50

4

BAV9

9W

3

12

TP50

4

1

R52

810

0K

R52

11M

D50

7R

ED

R51

9

22K

R51

2

220R

TP50

1

1

R53

0

33K

D50

1BA

V99W

3

1

2

R51

018

0K

C51

322

PF

D50

6G

REE

N

TP50

8

1

L502

1K

C50

6

1NF

R52

710

0K

J501

6291

0515

0521

USB

_VC

C1

USB

DM

2

USB

DP

3

USB

_GN

D5

SHEL

L6

SHEL

L7

SHEL

L8

ID4

SHEL

L9

R50

210

K

R50

72.

7K

J500 1 2 3 4

C50

31U

F

TP51

1

1

C50

710

NF

C51

210

0NF

D50

8

BAS5

21-7

R52

933

K

NTC

R51

647

K

R51

110

0K

R50

610

0K

TP50

3

1

+ -

U50

1

TSV5

21IC

T

1+I

N

3-IN

2V-

5V+

4O

UT

C50

010

0NF

R50

510

K

TP50

6

1

TP50

7

1

R51

4

220R

R51

810

0K

C50

210

0NF

C50

41N

FTP

502

1

D50

9R

B520

S

L501

1K

R51

5

100R

R50

310

0K

C51

0

100N

F

C50

9

100N

F

Q50

0

NPN

-PN

P

2

31 4

5

6

C50

522

NF

R50

410

K

U50

0ST

WBC

_EP

VDD29

VDDA13

VOU

T31

VSS30

VSSA14

DC

DC

_DR

V21

DC

DC

_DAC

24

UPB

L25

DN

BL5

PWM

_QFO

D2

UAR

T_TX

32

UAR

T_R

X1

LED

6

QC

_IO

7

NR

ST28

SWIM

27

TAN

K_VO

LTAG

E15

VTAR

GET

16

QFO

D_A

DC

17

CO

IL_T

EMP

18

ISEN

SE19

VMAI

N20

CM

P_O

UT_

V8

CS_

CM

P9

DC

DC

_DAC

_REF

10

WAV

E_SN

S11

CU

RR

ENT_

DEM

OD

12

DEM

AGN

ET22

SYM

BOL_

DET

ECT

23

DN

BL_F

B26

I2C

_SD

A3

I2C

_SC

L4

VSS33

R52

51K

R52

033

0R

C50

82.

2 µF

R51

7

1M

VDD

_STW

BC

RES

ET

SWIM

SWIM

TAN

K_VO

LTAG

E

CU

RR

ENT_

DEM

OD

I2C

_SC

LI2

C_S

DA

RES

ET

CU

RR

ENT_

DEM

OD

USB

_DM

TAN

K_VO

LTAG

E

WAV

E_SN

S

USB

_DP

USB

_DM

USB

_DP

WAV

E_SN

S


UM2301 - Rev 2 page 44/71


M608

HTSB-M3-15-5-1

M621

HOLE_3.2MM_6

M624

HOLE_3.2MM_6

M623

HOLE_3.2MM_6

M619

WExxx_2xx

M604

D01475

M609

HTSB-M3-15-5-1

M600

M320 KRSTMCZ100-

M622

HOLE_3.2MM_6

M601

M320 KRSTMCZ100-

M602

M320 KRSTMCZ100-

M611

HTSB-M3-15-5-1

M607

D01475

M620

SPACER_3MM_MP_A6-A2

M627

OPTICAL_TARGET

M606

D01475

M610

HTSB-M3-15-5-1

M626

OPTICAL_TARGET

M603

M320 KRSTMCZ100-

M605

D01475

M625

OPTICAL_TARGET


USB for Quick Charge3 A on pin 1 & pin 51 A on other pins

VDD_STWBC

VDD_STWBC

QC_IO

USB_VCC_QC

R701

10R

R706

10R

R705

NP

R700

100K

R704100K

Q700

NPN-NPN

2

3

1

4

5

6

J700

USB_VCC1

USBDM2

USBDP3

USB_GND5

SHELL6

SHELL7

SHELL8

ID4

SHELL9

R70239K

R70739K

R70333K

USB_DM_QCUSB_DP_QC


UM2301 - Rev 2 page 45/71


US

B

5V 3V3

IO V

olta

ge s

elec

tion

(3V3

/ 5V

)

For d

ebug

VBU

S_U

SB_M

ASTE

R

VSS

VSS

VSS

VSS

VSS

VSS

VSS

VCC

_IO

VCC

_IOVC

C_I

O

VSS

VSS

VSS

VSS

VSS

VBU

S_U

SB_M

ASTE

R

VBU

S

VBU

S

VSS

R80

7

NPR80

2

0R

C80

210

NF

U80

1

FT23

2R

TXD

1

DTR

#2

RTS

#3

VCC

IO4

RXD

5

RI#

6

GN

D1

7

NC

18

DSR

#9

DC

D#

10

CTS

#11

CBU

S412

CBU

S213

CBU

S314

OSC

O28

OSC

I27

TEST

26

AGN

D25

NC

224

CBU

S023

CBU

S122

GN

D2

21

VCC

5I20

RES

ET#

19

GN

D18

3V3O

UT

17

USB

DM

16

USB

DP

15

C80

710

0NF

R80

3

330R

R80

50R

R81

010

K

C80

310

0NF

C80

110

0NF

R80

1

NP

J801 USB

_VC

C1

USB

DM

2

USB

DP

3

USB

_GN

D4

SHELL15

SHELL26

L800

120R

R80

4

0R

D80

0

I/O1#

11

GN

D2

VBU

S5

I/O2#

44

I/O1#

66

I/O2#

33

C80

547

PF

R80

80R

J800

VBU

S1

USB

DM

2U

SBD

P3

GN

D4

SHEL

L15

SHEL

L48

SHEL

L26

SHEL

L37

C80

610

UF

C80

447

PF

R80

910

K

R80

6

330R

TXD

VCC

3O

RXD

USB

DM

_DO

NG

LE

USB

DP_

DO

NG

LE

VBU

S Ex

tern

alPo

wer

Sup

ply

Con

nect

or

USB

LC6-

2SC

6


UM2301 - Rev 2 page 46/71

7 Bill of materials

Table 6. STEVAL-ISB044V1 bill of materials

Item Q.ty Ref. Part/Value Description Manufacturer Order code

1 2 C100, C114 NP, 0603 Ceramiccapacitors Any C_NP_0603

2 2 C101, C103 10 µF, 25 V,1206, ±20%

Ceramiccapacitors Wurth Elektronik 885012108021

3 1 C102 NP, 1210 Ceramiccapacitor Any C_NP_1210

4 4 C104, C108,C212, C507

10 NF, 50 V,0402, ±15%

Ceramiccapacitors Any 10NF_50V_X7R_0402

5 4 C106, C204,C208, C217

22 µF, 25 V,1210, ±20%

Ceramiccapacitors Wurth Elektronik 885012109014

6 8

C107, C110,C115, C306,C500, C501,C502, C509

100 NF, 25V,0402, ±15%


7 4 C109, C116,C200, C211 NP, 0402 Ceramic

capacitors Any C_NP_0402

8 1 C111 10 µF, 10 V,0805, ±10%

Ceramiccapacitor Murata GRM21BR71A106KE51L

9 4 C112, C113,C510, C512

100 NF, 50 V,0402, ±15%


10 1 C117 NP, 0603 Ceramiccapacitor Murata GRM188R61E105KA12J

11 1 C202 100 NF, 50 V,0603, ±5%

Ceramiccapacitor Murata GRM188R71H104KA93D

12 2 C203, C207 10 µF, 50 V,1206, ±10%

Ceramiccapacitors Any 10UF_50V_X5R_1206

13 1 C205 100 µF, 35 V,±20%

Aluminiumcapacitor Panasonic EEEFT1V101AP

14 1 C206 5.6 NF, 50 V,0402, ±15%

Ceramiccapacitor Any 5.6NF_50V_X7R_0402

15 1 C209 1 NF, 50 V,0402, ±15%

Ceramiccapacitor Any 1NF_50V_X5R_0402

16 1 C213 10 PF, 50 V,0402, ±15%

Ceramiccapacitor Any 10PF_50V_X7R_0402

17 2 C214,C215 220 NF, 35 V,0603, ±15%


18 1 C216 470pF, 50V,15% Ceramiccapacitor Any 470pF_50V_COG_402

19 4 C300, C301,C302, C304

47 NF, 100 V,1206, ±5%

Ceramiccapacitors TDK C3216C0G2A473J115AC

20 1 C303 1 NF, 50 V,0603, ±15%


21 1 C305 10 µF, 6.3 V,0805, ±15%

Ceramiccapacitor Any 10UF_6V3_X5R_0805

22 2 C307, C505 22 NF, 50 V,0402, ±15%


UM2301Bill of materials

UM2301 - Rev 2 page 47/71


23 1 C308 470 PF, 50 V,0402, ±15%


24 1 C309 470 NF, 25 V,1206, ±15%


25 1 C310 1.5 NF, 50 V,0402, ±10%


26 1 C400 10 NF, 100 V,0805, ±5%

Ceramiccapacitor TDK C2012C0G2A103J125AA

27 1 C401 22 NF, 100 V,1210, ±5%

Ceramiccapacitor TDK C3225C0G2A223J160AA

28 1 C402 100 PF, 50 V,0402, ±5%

Ceramiccapacitor Any 100PF_50V_COG_0402

29 2 C403, C513 22 PF, 50 V,0402, ±5% Cer,402 Any 22PF_50V_COG_0402

30 1 C404 4.7 NF, 50 V,0402, ±15%


31 1 C405 220NF,50V,10%


32 1 C406 4.7 NF, 100 V,0603, ±10%

Ceramiccapacitor TDK CGA3E2X7R2A472K080

AA

33 1 C503 1 µF, 16 V,±10%

Ceramiccapacitor Any 1UF_16V_X5R_0402

34 2 C504, C506 1 NF, 100 V,0402, ±15%


35 1 C508 2.2 µF, 25 V,0402, ±10%

Ceramiccapacitor Any 2.2UF_25V_X5R_0402

36 1 C511 220 PF, 50 V,0402, ±15%


37 1 C514 2.2 NF, 50 V,0402, ±15%


38 3 C801, C803,C807

100 NF, 50 V,0603, ±15%


39 1 C802 10 NF, 50 V,0603, ±15%


40 2 C804, C805 47 PF, 25 V,0603, ±15%

Ceramiccapacitors Any 47PF_25V_X5R_0603

41 1 C806 10 µF, 25 V,0805, ±10%

Ceramiccapacitor Any 10UF_25V_X7R_0805

42 1 D100 SMM4F13A TVS ST SMM4F13A-TR

43 1 D201 STPS8L30DEE Power Schottkyrectifier ST STPS8L30DEE-TR

44 1 D202 4.3V Zener, SOD323 NXP BZX384-C4V3-AK

45 1 D300 4148WS Diode, SOD323 Any Any

46 1 D400 MMBD1503A Diode, SOT23 Fairchild MMBD1503A

47 2 D500, D508 BAS521-7 Diode,DIOD_SOD523 Any Any

48 2 D501, D504 BAV99W Diode, SOT323 NXP BAV99W

49 1 D506 GREEN LED,L3.2_W2.5_H1 Wurth Elektronic 155124VS73200


UM2301 - Rev 2 page 48/71

http://www.st.com/en/product/smm4f

http://www.st.com/en/product/stps8l30dee


50 1 D507 RED LED,L3.2_W2.5_H1 Wurth Elektronic 155124RS73200

51 1 D509 RB520S Schottky,SOD523 Rohm RB520S

52 1 D800 USBLC6-2SC6YAutomotive verylow capacitanceESD protection

ST USBLC6-2SC6Y

53 1 J100 PJ-002A Jack CUI PJ-002A

54 1 J101 61300311121 Header Wurth Elektronic 61300311121

55 1 J500 5-826936-0 Header Te Connectivity 5-826936-0

56 2 J501, J700 6.29105E+11 USB Wurth Elektronic 629105150521

57 1 J800 48037-0001 USB Molex 48037-0001

58 1 J801 61400416021 USB Wurth Elektronic 61400416021

59 1 L101 2.2 µH, 3.8 A,±20%

Inductor,L5_W5_H4 Wurth Elektronic 74404054022

60 1 L102 NPInductor,L2.5_W2.0_H1.0

Wurth Elektronic 74438323100

61 1 L200 4.7 µH, 7 A,±20%

Inductor,L10_W10_H5 Wurth Elektronic 7447714047

62 2 L501, L502 1 K, 0.2 A,±25% Ferrite, 402 Murata BLM15AG102SN1D

63 1 L800 120 R, 0.5 A,±25% Ferrite, 603 Wurth Elektronic 74279262

64 1 M300 12 µH, 8 A Inductor, Wurth Elektronic 760 308 104 113

65 4 M600, M601,M602, M603

M320KRSTMCZ100- Screw Duratool M320 KRSTMCZ100-

66 4 M604, M605,M606, M607 D01475 Spacer Duratool D01475

67 4 M608, M609,M610, M611

HTSB-M3-15-5-1 Spacer Richco HTSB-M3-15-5-1

68 1 M619 PCB WE - 2layers PCB Any Any

69 1 M620 SPACER_3MM_MP_A6-A2, , Cover Any Any

70 1 Q202 NPN-PNP CMS, SOT363 OnSemiconductors MMDT4413

71 3 Q203, Q303,Q304 N-MOS N-channel

Power MOSFET ST STL10N3LLH5

72 3 Q301, Q400,Q700 NPN-NPN CMS, SOT363 OnSemiconducto

rs BC847CDW1T1G

73 1 Q302 NPN CMS, SOT23 DiodesIncorporated BC817-40-7-F

74 1 Q500 NPN-PNP CMS, SOT363 OnSemiconductors BC847BPDW1T1G

75 2 R100, R209 220 K, 1/16 W,±1% Resistors Any Any

76 1 R101 18 K, 1/16 W,±1% Resistor Any Any


UM2301 - Rev 2 page 49/71

http://www.st.com/en/product/usblc6-2sc6y

http://www.st.com/en/product/stl10n3llh5




79 1 R107 NP Resistor Any Any

80 3 R108, R201,R705 NP Resistors Any Any

81 2 R109,R214 0 R, 1/16 W,±5% Resistors Any Any

82 3 R200,R701,R706

10 R, 1/16 W,±5% Resistors Vishay 10R_5%_0402

83 3 R202, R309,R525

1 K, 1/16 W,±1% Resistors Any Any

84 2 R204, R400 470 R, 1/16 W,±1% Resistors Any Any

85 1 R205 0.068 R, 1 W,±1% Resistor Te Connectivity TLM3ADR068FTE

86 1 R206 47 R, 1/16 W,±5% Resistor Any Any

87 2 R207, R212 3.3 K, 1/16 W,±1% Resistors Any Any


89 3 R210, R211,R308


90 1 R213 4.7 K, 1/16 W,±1% Resistor Any Any

91 8

R215, R503,R511, R513,R527, R528,R700, R704


92 2 R300, R301 4.7 R, 1/16 W,±1% Resistors Any Any

93 3 R302, R408,R521

1 M, 1/16 W,±1% Resistors Any Any

94 5R303, R406,R409, R506,R518


95 5R304, R305,R306, R403,R404


96 1 R307 0.022 R, 1 W,±0.01 Resistor Any Any






UM2301 - Rev 2 page 50/71



102 3 R502, R504,R505






107 1 R516 47 K, ±1% Resistor Murata NCP15WB473F03RC

108 1 R517 1 M, 1/16 W,±5% Resistor Any Any



111 3 R529, R530,R703




114 2 R801, R807 NP Resistors Any Any

115 4 R802, R804,R805, R808

0 R, 1/10 W,±5% Resistors Any Any



118 4 TP100, TP101,TP304, TP305 WIRE_SOLDER Test point Any Any

119 8

TP102, TP200,TP506, TP507,TP508, TP509,TP510, TP511

5001 Test point Keystone 5001

120 9

TP103, TP301,TP302, TP303,TP400, TP501,TP502, TP503,TP504

TPSMD-1MM Test point Any Any

121 1 U100 LDK320M-RLow dropvoltageregulator

ST LDK320M-R

122 1 U101 NP

Step-downmonolithicswitchingregulator

ST L6984

123 1 U300 MCP14700 Driver,DFN8_L3_W3 Microchip MCP14700_DFN8


UM2301 - Rev 2 page 51/71

http://www.st.com/en/product/ldk320

http://www.st.com/en/product/l6984


124 1 U500 STWBC_EP

Digital controllerfor wirelessbattery chargertransmitters

ST STWBC-EP

125 1 U501 TSV521ICT CMOS op-amps ST TSV521ICT

126 1 U801 FT232R Converter,SSOP28 FTDI FT232R


UM2301 - Rev 2 page 52/71


http://www.st.com/en/product/tsv521

8 Board assembly and layout

The STEVAL-ISB044V1 evaluation board is designed using a low cost 2-layers PCB with all the components onthe 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-ISB044V1 evaluation board: functional block assembly

Power Supply connections & input filtering

v

Boost Circuit

LDO (DCDC optional)

Quick Charge circuit

Demodulation circuits

STWBC-EP

Half bridge driver and LC Tank circuit

Voltage/current demodulation circuits

LED, SWIM and USB/UART debug connectors

UM2301Board assembly and layout

UM2301 - Rev 2 page 53/71

8.1 Power signals (BOOST, GND, LC)

Figure 57. STEVAL-ISB044V1 evaluation board: power signal routing

Layer 1: large GND tracks with lot of vias for high power circuits

Layer 1: Large tracks for high current circuits (booster, half bridge, LC tank)

UM2301Power signals (BOOST, GND, LC)

UM2301 - Rev 2 page 54/71

Figure 58. STEVAL-ISB044V1 evaluation board: ground plan

Full GND plan on Layer 2

Only a few noisy signalsrouted 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.


UM2301 - Rev 2 page 55/71

Figure 59. STEVAL-ISB044V1 evaluation board: DC-DC boost routing details

VIN

VDCDC

DEMAGNET

C21722 µF

R200

10R

C2065.6NF

C216

470pFQ203N-MOSSTL10N3LLH5

5

4

16 7 8

2 3C209 1NF

R215100K

TP200

1

C207

R214

0R

+ C205

D2024.3V

C208

D201

STPS8L30DEE C203

C200NP

R2050.068R

C204

L2004.7 µH

C202100NF

R2021K

R204470R

10 µF 10 µF100 µF

22 µF22 µF

Net VIN

Net L200 D201-QQ203

Net D201-C205

Net Q203R205


UM2301 - Rev 2 page 56/71

Figure 60. STEVAL-ISB044V1 evaluation board: power GND routing details

VIN

C21722 µF

R200

Q203N-MOS

STL10N3LLH5

5

4

16 7 8

2 3

1

4

R2050.068R

R204470R

GND from R205 and C217: high currentA lot of viasONLY in this area

12 V DC

USB_VCC_QC

TP100WIRE_SOLDER

1J100

PJ-002A

231

J101

13

2

D100

SMM4F13A

C100

NP

C102

NP

C10110 µF

TP101WIRE_SOLDER1

C114

NP

C112

100NF

GND directly connected toTP101 and Capaconnect bottom side with alot of vias

10 R

GND VBOOST andGND Capa of tankon the same areaInsert many vias for high current

ONLY in this area

GND from R307:connected near GNDfrom " GND VBOOST"

Direct GND line connection

TP302

1

TP303

1

R3070.022R

VRSENSE

POWER_NODE

C300 47NF

C301 47NF

C304 47NF

C302 47NF

VDCDC

C2065.6NF

TP200

1

C207 + C205C208C203 C204C202100NF 10 µF 10 µF

100 µF22 µF22 µF

Bridge nets are designed on the top layer; traces must be very large(>2 mm).


UM2301 - Rev 2 page 57/71

Figure 61. STEVAL-ISB044V1 evaluation board: bridge node routing details

VDCDC

VDCDC

POWER_NODE

PWM_QFOD

C300 47NFR3091K TP304

WIRE_SOLDER

1

C3031NF

C3101.5NF

C301 47NF

C304 47NF

D3004148WS

Q304N-MOSSTL10N3LLH5

51

6 7 8

2 3


51

6 7 8

2 3

TP305WIRE_SOLDER

1

Q302NPN

1

23

M300

C302 47NFBRIDGE_NODE

12 µH

Net VDCDC-Q303

Net bridge node Net power node

Net GND


UM2301 - Rev 2 page 58/71

Figure 62. STEVAL-ISB044V1 evaluation board: shunt resistor routing details


C3031NF

TP302

1


5

4

16 7 8

2 3

1 2 3

TP303

1

R3070.022R

VRSENSE

VRSENSE trace between Q304 and R307must be very short

GND -R307 connecteddirected to GND - VBOOST

8.2 EMI components

Figure 63. STEVAL-ISB044V1 evaluation board: EMI components (1 of 2)

C206

C202

R214 - C216

VDCDC

C2065.6NF

C216

470pF

TP200

1

C207

R214

0R

+ C205C208

D201

STPS8L30DEE C203 C204C202100NF

R2021K

10 µF 10 µF100 µF

22 µF22 µF

R214 and C216very close to D201

C202 and C206 near C205 VDCDCand C205 GND

UM2301EMI components

UM2301 - Rev 2 page 59/71

Ceramic capacitors (C100, C101, C103, C112, C114 and C100) for EMI and filters must be placed close to thesupply input and L101.

Figure 64. STEVAL-ISB044V1 evaluation board: EMI components (2 of 2)

12 V DC

USB_VCC_QC

TP100WIRE_SOLDER

1

J100

PJ-002A

231

J101

13

2

D100

SMM4F13A

C100

NP

C102

NP

C10310 µF

C10110 µF

TP101WIRE_SOLDER1

L1012.2 µH

C114

NP

C112

100NF

UM2301EMI components

UM2301 - Rev 2 page 60/71

8.3 STWBC-EP layout

Figure 65. STWBC-EP digital controller layout

C112

C100

C103

C501

L501

C503

L502

C502

R505

C501

100NF

L5011K

VDD

29

VDD

A13

DEMAGNET22

SYMBOL_DETECT23

C501-L501 nearVDDA (pin13)

C503-C502-L502near VDD (pin29)

R505 near Reset(pin 28)

STWBC-EPDigital controller

DCDC_DACDCDC_DRV

L5021K

C5031UF

R50510K

C502100NF

VDD

29

VOUT31

DCDC_DRV21

DCDC_DAC24

NRST28 SWIM27SWIM

RESET

UM2301STWBC-EP layout

UM2301 - Rev 2 page 61/71

8.4 Current sensing and demodulation

Figure 66. STEVAL-ISB044V1 evaluation board: current sensing

Q301

R308

C307


VDD_STWBC

ISENSE

IDEMOD

C30722NF

R304

470KR306470KR305

470K

R303100K

Q301NPN-NPN

2 31

456

R30810K

R3070.022R

TP301

1

R3021M

C308470PF

VRSENSE

C307 near Isense input (pin 19) Current amplifier

(Q301, R and C) near VRSENSE

Warning:R308 GND is done througha trace connected to GNDon Rsense R307Don't mix this track withground plane

UM2301Current sensing and demodulation

UM2301 - Rev 2 page 62/71

Figure 67. STEVAL-ISB044V1 evaluation board: current demodulation

C112

C100

C501

L501

C502

L502

C503

R505

Q301

R308

U501

R517

C513

C512 C511

Q301C112

C100

C502

L502

C503

R505

Q301

R308U501

R517

C513

C512 C511

Q301

C510R519 R518

VDD_STWBCVDD_STWBC

IDEMOD

C511

220PF

D504

BAV99W

3

1

2

R519

22K

C51322PF

TP508

1

C512100NF

+

-

U501

TSV521ICT

1 +IN

3 -IN

2 V-

5V+

4OUT

R518100K

C510

100NF

C509

100NF

R520330R

C5082.2 µF

R517

1M

CURRENT_DEMOD

VBUSISENSE

VTARGETQFOD_ADC

TANK_VOLTAGE15

VTARGET16

QFOD_ADC17

COIL_TEMP18

ISENSE19

VMAIN20

CURRENT_DEMOD12

TANK_VOLTAGE

CURRENT_DEMOD

C501, R518, R519 near Current_demod input(U500 pin 12)

Current demod (U501, R and C) nearCurrent amplifier output (Q301)

UM2301Current sensing and demodulation

UM2301 - Rev 2 page 63/71

9 References

Freely available on www.st.com:1. STWBC-EP datasheet2. STEVAL-ISB044V1 data brief (DB3408): "Qi MP-A10 15 W wireless charger TX evaluation kit based on

STWBC-EP"3. STSW-ISB044FW data brief (DB3409): "Firmware for the STEVAL-ISB044V1 wireless power transmitter

evaluation board based on STBWC-EP"4. STSW-STWBCFWDT data brief (DB3410): "STWBC firmware downloader tool"5. STSW-STWBCGUI data brief (DB3418): "Graphical user interface for wireless power transmitter evaluation

boards based on the STWBC chip family"

UM2301References

UM2301 - Rev 2 page 64/71

Revision history

Table 7. Document revision history

Date Version Changes

30-Oct-2017 1 Initial release.

14-May-2018 2 Updated Figure 4. STEVAL-ISB044V1 evaluation board: power supply selection and Section 7 Bill ofmaterials.

UM2301

UM2301 - Rev 2 page 65/71

Contents

1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Hardware description and setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.1 System block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 STEVAL-ISB044V1 wireless transmitter board overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.3 STWBC-EP pinout and pin description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Download procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.1 STSW-STWBCGUI software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Firmware download via STSW-STWBCGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2.1 Download procedure with a new chip (never been programmed) . . . . . . . . . . . . . . . . . . . 10

3.2.2 Firmware upgrade procedure (chip already programmed). . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Erasing firmware procedure using STVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3.2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.4 Firmware download with command line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.4.1 Firmware download with written chip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.4.2 Firmware download with blank chip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.5 STVP file creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.6 Firmware download with STVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4 Evaluation equipment setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.1 External power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.2 USB charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.3 UART configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5 GUI and evaluation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

5.1 Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.2 Test procedure for board calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.2.1 Presence detection calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.2.2 QFOD calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

UM2301Contents

UM2301 - Rev 2 page 66/71

5.3 Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.4 Stand-by consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

7 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

8 Board assembly and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

8.1 Power signals (BOOST, GND, LC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.2 EMI components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.3 STWBC-EP layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

8.4 Current sensing and demodulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

UM2301Contents

UM2301 - Rev 2 page 67/71

List of figuresFigure 1. STEVAL-ISB044V1 evaluation board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STWBC-EP block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Figure 3. STEVAL-ISB044V1 evaluation board: connectors, LEDs and test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 4. STEVAL-ISB044V1 evaluation board: power supply selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figure 5. STWBC-EP pinout in MP-A10 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 6. STSW-STWBCGUI installation file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 7. Windows Device Manager: COM port selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 8. STSW-STWBCGUI start screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 9. Dongle connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 10. Firmware download via STSW-STWBCGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 11. Firmware file selection message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 12. Firmware file selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 13. Power on message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 14. USB-to-UART dongle to STEVAL-ISB044V1 connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 15. DOS window: download in progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 16. STVP configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 17. STEVAL-ISB044V1 evaluation board: ST-LINK connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 18. STVP core selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 19. STVP download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 20. STVP wrong device selected alert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 21. STVP incompatibility device action query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 22. STSW-STWBCGUI command line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 23. STSW-STWBCGUI command line with blank chip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 24. STSW-STWBCGUI: convert CAB to STVP files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 25. Selecting the CAB file to be converted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 26. STVP project file name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 27. STVP files created . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 28. STVP file selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 29. STEVAL-ISB044V1 evaluation board: test setup configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 30. STEVAL-ISB044V1 evaluation board: external power supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 31. STEVAL-ISB044V1 evaluation board: USB charger connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 32. STEVAL-ISB044V1 evaluation board: UART connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 33. STSW-STWBCGUI: object detected and charge in progress. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 34. STSW-STWBCGUI: Qi protocol window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 35. STSW-STWBCGUI: Qi monitor window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Figure 36. STSW-STWBCGUI: Parameters window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 37. STSW-STWBCGUI: modified parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 38. STSW-STWBCGUI: saving modified parameters (Dump to bin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 39. STSW-STWBCGUI: bin file backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 40. STSW-STWBCGUI: CAB file patch button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Figure 41. STSW-STWBCGUI: start auto-calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 42. STSW-STWBCGUI: presence detection test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 43. STSW-STWBCGUI: test result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 44. STSW-STWBCGUI: QFOD test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 45. STSW-STWBCGUI: QFOD test result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 46. Efficiency setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Figure 47. STEVAL-ISB044V1 evaluation board: efficiency performance with MP1B Rx . . . . . . . . . . . . . . . . . . . . . . . . 38Figure 48. STEVAL-ISB044V1 circuit schematic (1 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Figure 49. STEVAL-ISB044V1 circuit schematic (2 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Figure 50. STEVAL-ISB044V1 circuit schematic (3 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 51. STEVAL-ISB044V1 circuit schematic (4 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Figure 52. STEVAL-ISB044V1 circuit schematic (5 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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UM2301 - Rev 2 page 68/71

Figure 53. STEVAL-ISB044V1 circuit schematic (6 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Figure 54. STEVAL-ISB044V1 circuit schematic (7 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Figure 55. STEVAL-ISB044V1 circuit schematic (8 of 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Figure 56. STEVAL-ISB044V1 evaluation board: functional block assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Figure 57. STEVAL-ISB044V1 evaluation board: power signal routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Figure 58. STEVAL-ISB044V1 evaluation board: ground plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Figure 59. STEVAL-ISB044V1 evaluation board: DC-DC boost routing details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Figure 60. STEVAL-ISB044V1 evaluation board: power GND routing details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Figure 61. STEVAL-ISB044V1 evaluation board: bridge node routing details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Figure 62. STEVAL-ISB044V1 evaluation board: shunt resistor routing details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 63. STEVAL-ISB044V1 evaluation board: EMI components (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 64. STEVAL-ISB044V1 evaluation board: EMI components (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Figure 65. STWBC-EP digital controller layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 66. STEVAL-ISB044V1 evaluation board: current sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Figure 67. STEVAL-ISB044V1 evaluation board: current demodulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

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List of tablesTable 1. STEVAL-ISB044V1 electrical performance: input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Table 2. STEVAL-ISB044V1 electrical performance: system characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Table 3. Connector description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 4. Test point description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 5. STWBC-EP pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Table 6. STEVAL-ISB044V1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

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UM2301 - Rev 2 page 70/71

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UM2301

UM2301 - Rev 2 page 71/71

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