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For the analog buck-boost module, the LTC3789 is selected to generate the rail voltage. The WCT chip 
controls the rail voltage by one analog signal. This analog signal affects the analog buck-boost converter 
feedback, and then the system can get the rail voltage as the system expects. 

               

 

Figure 7  Analog buck-boost main circuits 

The digital buck-boost is recommended for use on this wireless charging solution due to its lower cost, 
simpler hardware circuits, and easier to be controlled. 

4.4  Full-bridge and resonant circuits 

The full-bridge power stage consists of two MOSFET Drivers, U8 and U9, as well as four power 
MOSFETs, Q13, Q15, Q19, and Q20. The MOSFET Drivers are powered by the stable voltage level 5 V 
DC that decreases the power losses in the drivers and MOSFETs. The full-bridge power stage converts the 
variable DC voltage VRAIL to the square wave 50% duty-cycle voltage with 125 kHz frequency. The 
range of the used frequency (120 kHz to 130 kHz) is defined in the Qi specification for the MP-A9 
topology. 

The resonant circuits consist of C111, C112, C423, C580, and coils, all of which are fixed values defined 
in the Qi specification for the MP-A9 topology. The snubber RC pairs connected in parallel to power 
MOSFETs are used to lower the high frequency EMI products. The Vrail discharge circuit Q46, R376, is 
switched ON while the system is terminated. 

C524 0.01uF

GND6

R664

1K

R665

1K

R666 68K

C525 1000pF

C526 3300pF

R667

0

R668

0

DNP

R669
120K

R671 0

R672 0

DNP

C527
10uF

R676 0.015

GND6

GND6

C529 0.22uF

INTVCC

9

C530 4.7uF

GND6

C531 0.22uF

GND6

VBAT_SW_6

R679

0

GND6

INTVCC

9

INTVCC

9

GND6

R646 2.00k

R687 2.00k

LTC3789IGN

U75

VFB

1

SS

2

SEN

SE+

3

SEN

SE-

4

ITH

5

SGND

6

MODE/PLLIN

7

FREQ

8

RUN

9

VINSNS

10

VOUTSNS

11

ILIM

12

13

IOSENSE-

14

TRIM

15

SW2

16

TG2

17

BOOST2

18

BG2

19

EXTVCC

20

INTV

CC

2

1

VIN

22

BG1

23

PGN

D

2

4

BOOST1

25

TG1

26

SW1

27

PGOOD

28

GND6

R657

0

DCDC_PG_6

9

GND6

R670

0

VRAIL_6

R625

1.6K

C502

10uF

GND6

C503
10uF

GND6

C504
10uF

GND6

R680 0

VBAT_SW_6

C513
47pF

VRAIL_6

TP64

DNP

Differential Wire

Small board 6

DCDC_EN_6

9

GND6

R634 10

R635 10

D90 1PS76SB10

A

C

R637 10

R636 10

R639 0

R638 0

D91

1PS76SB10

A

C

R641 0

R640 0

R642 0

R643

0

C515
0.1uF

50V

R645

0

D85

PMEG2005AEA

A

C

D86

PMEG2005AEA

A

C

D87

PMEG2005AEA

A

C

D88

PMEG2005AEA

A

C

C518
0.1uF

50V

R651
0.015

R652
10.0K

R653
10.0K

Q76

NVTFS5820NLTAG

1

4

3

2

5

Q77

NVTFS5820NLTAG

1

4

3

2

5

R654
10.0K

Q78

NVTFS5820NLTAG

1

4

3

2

5

R655
10.0K

Q79

NVTFS5820NLTAG

1

4

3

2

5

L32

10UH

1

2

VBAT_SW_6

C521

0.1uF

50V

VRAIL_6

INTVCC

9

R662
200

C523

4700pF

RAIL_CNTL_6

9

INTVCC

9

R663
39K

R661 4.3K

GND6

R629 100

DNP

R628 100

DNP

VRAILB_S6

C514 1.0uF

IS-_S6

9

R677

100

R678

100

C517
2700pF

C520
2700pF

C519
2700pF

C516
2700pF

R648
3.32

R647
3.32

R650
3.32

R649
3.32

 

WCT1011A/WCT1013A Automotive MP-A9 Wireless Charging Application User’s Guide, Rev. 0, 10/2017 

NXP Semiconductors 

 

9 

Содержание WCT1011A

Страница 1: ...to 6 V DC level during the start stop function The nominal delivered power to the receiver is 15 W at the output of the receiver and can be compatible with 5W receiver Designed to meet the Qi 1 2 3 s...

Страница 2: ...CT Automotive MP A9 WCT 15WTXAUTO demo board 2 Power supply connector 3 Power supply 12V 3A Figure 1 Hardware pack contents WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guid...

Страница 3: ...or the FreeMASTER tool connection for the debug option and the console connection and the temperature connector and backup touch sense connector are placed on the edge of the board The thermal resisto...

Страница 4: ...ower supply 12 V to the socket 2 Plug the power supply connector into the board 3 Connect power supply 12 V and power supply connector Figure 3 Power supply components WCT1011A WCT1013A Automotive MP...

Страница 5: ...irtual serial port on the computer should work well 2 Plug the USB UART converting board to SCI connector J2 according to the SCH signal pin position The two channels of UART are for different purpose...

Страница 6: ...in accordance with WCR requirements The receiver sends messages to the WCT through ASK on the coil resonance power signal and the transmitter sends the information to the receiver by FSK according to...

Страница 7: ...o i l 1 C o i l 2 DDM RC circuits pack5 Q fator detection Input Voltage Temperature Sampling Circuit Buck boost Digital analog control MOS DRIVER WCT1011 3A NFC CAN CONSOLE FreeMaster VIN DCDC VOUT CA...

Страница 8: ...the full bridge inverter power supply The buck boost can be digitally controlled by the WCT chip or the individual analog buck boost converter and the WCT chip just controls the output voltage feedbac...

Страница 9: ...system is terminated C524 0 01uF GND6 R664 1K R665 1K R666 68K C525 1000pF C526 3300pF R667 0 R668 0 DNP R669 120K R671 0 R672 0 DNP C527 10uF R676 0 015 GND6 GND6 C529 0 22uF INTVCC 9 C530 4 7uF GND...

Страница 10: ...TP19 DNP COIL1_EN 3 SW_GATE0 Q9 IPG20N10S4L 22 2 4 1 3 6 5 SW_GATE1 Q12 IPG20N10S4L 22 2 4 1 3 6 5 COIL2_EN 3 R101 33 2K TP20 DNP TP21 DNP SW_GATE2 COILS 6 R95 7 5K Q16 IPG20N10S4L 22 2 4 1 3 6 5 R74...

Страница 11: ...ould be measured by sampling input voltage and input current and could be estimated through the coil current The Received Power represents the amount of power that is dissipated within the RX due to t...

Страница 12: ...When a RX baseline is charged by NXP WCT 15WTXAUTO only the power loss FOD baseline works If a RX extension is placed on NXP WCT 15WTXAUTO the Q factor would be measured at first to detect if there i...

Страница 13: ...image Figure 10 Quality factor threshold example 4 7 1 Free Resonance Q factor The free resonance Q factor detection is to detect the decay rate of the resonance signal as shown in Figure 11 With the...

Страница 14: ...a time The coil is equipped with the dual N MOSFETs Q9 Q12 or Q16 controlled by the WCT1011A WCT1013A controller through the control interface based on the low power bipolar transistors 4 9 Analog se...

Страница 15: ...ed and operated from the web page like control panel 5 1 Software setup To set up the software perform the following steps 1 Install FreeMASTER V2 0 2 or later version from the NXP website nxp com fre...

Страница 16: ...ject Options Figure 14 Choosing Options 7 Ensure that the correct virtual Port according to Step 3 and Speed are selected Figure 15 Setting Port and Speed 8 Ensure that the MAP file is correct The def...

Страница 17: ...demo wct1011Ademo demo_sdm_debug wct1011A demo_debug elf Figure 16 Setting the MAP file 9 Connect FreeMASTER Power on MP A9 and then start the communication by clicking the STOP button on the FreeMAST...

Страница 18: ...variables working parameters system status DDM variables and RX information HAL This block contains ADC raw data and DDM buffer values NVM This block lists all NVM parameters Q factor sub block shows...

Страница 19: ...the variables above all the global variables can be added to FreeMASTER The procedure to generate and add variables to watch window is described in the FreeMASTER user manual 5 3 Application parameter...

Страница 20: ...er is described next to the text field NOTE Some parameters of System Params and Coil Params are not used for MP A9 The used parameters are described in WCT1011A WCT1013A Automotive MP A9 Run Time Use...

Страница 21: ...alDbg 1 This variable is in wct_LibParams c 2 Change FreeMASTER communication interface to JTAG and configure SCI0 as the debug console a define DEBUG_CONSOLE_SUPPORTED TRUE define FREEMASTER_SUPPORTE...

Страница 22: ...setup Table 1 Port configurations Port number Serial port from Device Manager Baud 19200 Data Bits 8 Stop Bits 1 Parity None Hardware Flow Control None Display As ASCII 5 Open the port or start commun...

Страница 23: ...ps www nxp com products developer resources software development tools codewarrior de velopment tools codewarrior development suites codewarrior development suite special CW S UITE SPECIAL tab Design_...

Страница 24: ...ack 2 Double click CW_MCU_v10 7_b160721_SE exe after downloading Figure 23 Setup file 3 Make sure that DSC is selected Figure 24 DSC installed WCT1011A WCT1013A Automotive MP A9 Wireless Charging Appl...

Страница 25: ...lect it as the default workspace Figure 25 Workspace Launcher dialog box 5 Choose Help Install New Software Figure 26 Install New Software WCT1011A WCT1013A Automotive MP A9 Wireless Charging Applicat...

Страница 26: ...d then select the mcu10_7 Wireless_Charging_MWCT101x win sp v1 0 1 zip file Figure 27 Selecting the update pack WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2...

Страница 27: ...acks 8 Review the license terms If you agree with the license terms select I accept the terms of the license agreement and then click Finish Figure 29 Installation finished WCT1011A WCT1013A Automotiv...

Страница 28: ...Import a project Right click in the CodeWarrior Projects window and choose Import to import an existing project as shown in the following figures If the CodeWarrior Projects window is not displayed o...

Страница 29: ...ting a project 2 Select the project directory as show in this figure Figure 33 Importing a project 3 WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2017 NXP Sem...

Страница 30: ...ng the project name in the project window shown in the following figure The demo_ldm_debug build contains debug information The demo_ldm_release is same with demo_ldm_debug except debug information WC...

Страница 31: ...wnload the project Download the project from the Debug drop down list or form Run Debug In Download Configurations select a download configuration according to your build configurations and debugger t...

Страница 32: ...sure that there is no object on the TX surface before making MCU run Due to the auto calibration for rail voltage Q factor and quick removal will be done at the first time the TX runs after flashed im...

Страница 33: ...mmer Flash File to Target Figure 39 Choosing Flash File to Target 2 Click New to create a new connection Figure 40 Creating a new connection WCT1011A WCT1013A Automotive MP A9 Wireless Charging Applic...

Страница 34: ...nnot be same with the connection name and choose dsc MWCT101x MWCT1013A from the Target Type drop down list Figure 42 Choosing MWCT1013A 5 Select Execute reset and Initialize target set the initializa...

Страница 35: ...Figure 43 Executing reset and initializing target WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2017 NXP Semiconductors 35...

Страница 36: ...the memory configuration file path to the CW installation folder and then select MWCT1013A mem Click Finish Figure 44 Memory configuration WCT1011A WCT1013A Automotive MP A9 Wireless Charging Applica...

Страница 37: ...Bin file path to be File to Flash Select Save the Target Task for future programming Power on MP A9 and click Erase and Program Figure 46 Erase and Program 9 Select the task path to save the task WCT...

Страница 38: ...the following log Figure 48 Programming finished log 11 For future programming just select FLASH MPA9 and wait until the programming is finished Figure 49 Future programming WCT1011A WCT1013A Automot...

Страница 39: ...application startup code 1 The boot loader code is not flashed to the board by default Download the boot loader code Import the boot loader project and follow the steps described in Section 7 3 to do...

Страница 40: ...x in the extension name s 3 Download the application code by the boot loader Most serial terminal programs can be used to send an S Record file from a host to the WCT1011A WCT1013A board through the...

Страница 41: ...nection Choose Setup Serial port to configure the COM properties as shown in Figure 54 Figure 53 Serial port WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2017...

Страница 42: ...ort setup Choose File Send file Figure 55 Send file Select the application S Record file and click Open WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2017 42 N...

Страница 43: ...gress is displayed in the Tera Term window After downloading is completed the application code starts Figure 57 Download application S Record file WCT1011A WCT1013A Automotive MP A9 Wireless Charging...

Страница 44: ...libration and parameters tuning For board calibration see the WCT1011A WCT1013A Automotive MP A9 V3 1 Run Time Debugging User s Guide WCT101XAV31RTDUG WCT1011A WCT1013A Automotive MP A9 Wireless Charg...

Страница 45: ...ure 58 Directory structure of the whole WCT1013A_MP A9 distribution 8 1 2 CodeWarrior Projects There are four CodeWarrior projects in the package The following figure shows all the four projects in Co...

Страница 46: ...here are two build configurations demo_sdm_debug Small Program Model including code for debugging demo_sdm_release Small Program Model excluding debugging code to save memory size Figure 60 WCT1011A b...

Страница 47: ...terface configuration is in freemaster_cfg h SCI interface is enabled and JTAG interface is disabled by default Only one interface can be set at a time define FMSTR_USE_SCI 1 To select SCI communicati...

Страница 48: ...tion is used to enable or disable it Table 5 Bootloader configurations Configurations Default value Location Description BOOTLOADER_USED FALSE appcfg h Enables or disables the function Set TRUE to ena...

Страница 49: ...Input power Non power transfer 3000 mW Power transfer 240 gPROT_Params wMaxInputPowerDuri ngNonXfer gPROT_Params wMaxInputPowerMult iPercent Application implemented When the TX is in the PING phase th...

Страница 50: ...ears at about every 5 seconds and the analog ping appears at about every 400 ms There are 12 to 13 analog ping between two digital pings The following figures show the PWM waveforms of the ping sequen...

Страница 51: ...Figure 63 Analog ping interval Figure 64 Digital ping pattern WCT1011A WCT1013A Automotive MP A9 Wireless Charging Application User s Guide Rev 0 10 2017 NXP Semiconductors 51...

Страница 52: ...srIndication 9 3 Debug messages The system is able to print messages from a specified SCI port to inform users about what happened in the system That may be helpful for users to understand the system...

Страница 53: ...eived in the configuration phase Message CFG T O Prints information when the configuration packet times out Message XFER INCOMP Prints information when the RX version is not compatible Message XFER RC...

Страница 54: ...ation 10 Revision History The following table provides the revision history Table 6 Revision history Revision number Date Substantive changes 0 10 2017 Initial release WCT1011A WCT1013A Automotive MP...

Страница 55: ...specifically disclaims any and all liability including without limitation consequential or incidental damages Typical parameters that may be provided in NXP data sheets and or specifications can and...

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