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ST STEVAL-ISB68WTX User Manual Download Page 13

6

Bill of material for 2.5 W TX application

Table 1. 

Bill of material for 2.5W TX

Component

Value

Manufacturer

Part Number

Notes

C1, C2, C3, C4

100nF/50V

Murata

GCM155R71H104KE02D

Series resonant capacitor

C4

47nF/50V

Murata

GCM155R71H473KE02D

Series resonant capacitor

C6, C7

47nF/50V

Murata

GCM155R71H473KE02D

Boot strap capacitor

C8

4.7nF/50V

Murata

GCM155R71H472KE02D

Boot strap capacitor

C9, C10, C11, C13, C14

10uF/25V

GRM188R61E106MA73D

Filtering capacitor

C12, C22, C15

100nF/50V

Murata

GCM155R71H104KE02D

Filtering Capacitors

C16

4.7uF/25V

Murata

GRM155R61A475MEAAD

Filtering Capacitor

C17

1uF/25V

Murata

GRM155R61E105KA12D

Filtering capacitor

C18, C19

10nF/50V

Murata

GRM155R71H103KA88J

Filter capacitor

C20

22nF/50V

MLCC, X7R, 50V

Filter capacitor

C21

680p/50V

MLCC, X7R, 50V

Filter capacitor

R1, R4

5K1

1005[0402] Resistor 1%

R2

220K

1005[0402] Resistor 1%

R3

10K

1005[0402] Resistor 1%

R6, R7, R8

4K7

1005[0402] Resistor 1%

D1

1N4448HLP

Diode

D2

TVS diode (optional)

D3, D4

LEDs (Optional)

D5

SMAJ22A

22V, TVS Diode

UM2901

Bill of material for 2.5 W TX        application

UM2901

 - 

Rev 1

page 13/18

Summary of Contents for STEVAL-ISB68WTX

Page 1: ...ly With External USB to I2C bridge the user can monitor and control the STWLC68JRF chip with the STSW ISB68PRO Graphical User Interface GUI The STEVAL ISB68WTX includes several safety mechanisms provi...

Page 2: ...rter On chip thermal management and protections over voltage over current over temperature Foreign Object Detection FOD supported 400 kHz I2C interface for communication with host system optional Exte...

Page 3: ...set to 2900 Hz Control Error Packet time out max count set to 6 Following interrupts are enabled by default Over Temperature Protection Interrupt OTP Over Current Protection Interrupt OCP End of Power...

Page 4: ...68WTX layout 2 2 Connection to USB I2C converter board Connect external USB converter board to P3 connector please ensure right connections for GND SDA SCL pins as shown in below picture UM2901 Connec...

Page 5: ...hical User Interface running on a PC Three LEDs monitor the operation of the bridge D1 green indicates I2C bus activity D2 red indicates correct initialization of the U1 chip D3 yellow is a power on i...

Page 6: ...ice monitor feature is enabled TX Ping is disabled when external TX is detected TX Control Error Packet CEP time out set to 800msecs Frequency HOP frequency used in case of ASK modulation failure is s...

Page 7: ...ferred by the coil by modulating the frequency duty cycle or amplitude of the PWM voltage on the transmitting coil Figure 6 Functional description 3 1 Power conversion The power transmitter design use...

Page 8: ...r required optimize the efficiency by properly adjusting the operating point and guarantee reliability by monitoring and protecting the device 3 3 ASK demodulation Using ASK modulation the receiver se...

Page 9: ...The FOD detection is enabled by setting TX_FOD_EN bit to 1 in register 0x0021h The AUTO FOD detection threshold can be set in AUTO_FOD_THR register 0x00EBh FOD is detected when abs PTX PRX TX_AUTO_FO...

Page 10: ...4 Component Layout Figure 9 Component layout UM2901 Component Layout UM2901 Rev 1 page 10 18...

Page 11: ...B7 AC1 A7 AC2 A2 AC2 A3 AC2 B2 AC2 B3 BOOT2 C1 CLAMP2 C7 COMM2 D7 VSSP A1 VSSP B1 VSSP A8 VSSP B8 VRECT A4 VRECT A5 VGATE D1 VRECT C3 VRECT B5 VRECT B4 BOOT E8 IEXT C2 VSSA C5 VSSA D3 VSSA D4 VSSA D5...

Page 12: ...2 D 3 ID 4 GND 5 Shield Shell P1 MicroUSB VBUS VDD VDD GND 100nF C1 2 2uF C3 GND GND VBUS 1uF C2 GND VDD VIN 1 INHIBIT 3 NC 4 VOUT 5 GND 2 U2 LD2981 220R R7 D1 LED VDD D2 LED 220R R6 D3 LED 470R R5 GN...

Page 13: ...Filtering capacitor C12 C22 C15 100nF 50V Murata GCM155R71H104KE02D Filtering Capacitors C16 4 7uF 25V Murata GRM155R61A475MEAAD Filtering Capacitor C17 1uF 25V Murata GRM155R61E105KA12D Filtering ca...

Page 14: ...Revision history Table 2 Document revision history Date Version Changes 14 Jul 2021 1 Initial release UM2901 UM2901 Rev 1 page 14 18...

Page 15: ...figuration 6 3 Functional description 7 3 1 Power conversion 7 3 2 Communication and control 8 3 3 ASK demodulation 8 3 4 FOD 9 4 Component Layout 10 5 Schematic of STEVAL ISB68WTX 11 5 1 Schematic of...

Page 16: ...List of tables Table 1 Bill of material for 2 5W TX 13 Table 2 Document revision history 14 UM2901 List of tables UM2901 Rev 1 page 16 18...

Page 17: ...VAL ISB68WTX and USB I2C converter 5 Figure 5 USB to I2C converter 5 Figure 6 Functional description 7 Figure 7 Power conversation 8 Figure 8 ASK demodulation circuit 9 Figure 9 Component layout 10 Fi...

Page 18: ...ts 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 pro...

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