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IntroductionThe STEVAL-ISB042V1 is a 15-watt Qi and 5-watt Airfuel inductive (former PMA) wireless power receiver evaluation boardbased on the STWLC33 wireless power receiver solution for the WPC/Airfuel mobile device with dual mode coil.
The board lets you evaluate the STWLC33 capabilities as a Qi/Airfuel inductive receiver as well as its ability to power another Qireceiver.
The solution is certified in accordance with the extended power profile Qi v1.2 and Airfuel SR1 standard.
The STWLC33 IC is powered by a dual mode Rx coil attached to a 1.5 mm thick plastic fixture.
The STWLC firmware offers users the flexibility to modify parameters and settings to ensure proper integration of the STWLC33device with the final application.
The layout is based on a cost-effective 4-layer PCB.
Figure 1. STEVAL-ISB042V1 evaluation board
Getting started with the dual mode wireless power evaluation board for Qi and Air-fuel inductive receiver and Qi-based transmitter with STWLC33
UM2289
User manual
UM2289 - Rev 2 - December 2017For further information contact your local STMicroelectronics sales office.
www.st.com/
1 Getting started
1.1 Board configuration and test points• P3 solder bridge:
– open = I²C bus and INT pin pull-up voltage provided externally via J5 header– shorted = I²C bus and INT pin pull-up voltage provided by STWLC33 (do not connect any load/source
to J5 header)• P9 solder bridge:
– open = USB port acts as unknown (D+/D- floating)– shorted = USB port acts as a dedicated charging port (shorted D+/D-)
• J3 testpoint header:– VRECT rectified voltage
• J4 testpoint header:– selectable user functions (GPIO0, GPIO1, GPIO2, GPIO4)– GPIO3 – do not connect any load during startup– INT – open drain interrupt output (active low)– EN – enable input (active low), pull on-board R4 down
1.2 Receiver modeThe easiest way to test the STEVAL-ISB042V1 evaluation board in receiver mode is to connect the load to J2header or, optionally, to J1 USB connector and place it on the transmitter surface.
J1 and J2 connectors are essentially different connectors for the same output node.
UM2289Getting started
UM2289 - Rev 2 page 2/26
Figure 2. STEVAL-ISB042V1 evaluation board: receiver mode
D6 indication LED lights up when the receiver enters the Power Transfer phase.
1.3 Transmitter modeTo test the board in Tx mode, you must provide a 5 V power supply to the J2 header (ensure STWLC33 is notoperating in Rx mode power transfer) and switch STWLC33 to Tx mode over I²C interface (J8 header).
Procedure Step 1. Connect the bundled USB to the I²C bridge.
UM2289Transmitter mode
UM2289 - Rev 2 page 3/26
Figure 3. STEVAL-ISB042V1 evaluation board: transmitter mode
Step 2. Use the PC GUI application.Step 3. Connect the I²C bridge.Step 4. Switch to TX mode tab.Step 5. Click Load binary image button.Step 6. Select the GUI STWLC33_TxMode_RAM_binary.bin file.
Figure 4. STEVAL-ISB042V1 GUI Tx mode tab
Step 7. Verify the result by checking the operation mode.If the label indicates Transmitter mode, the kit is ready and a receiver can be placed on the coil sur-face.
Note: The coil used in the kit is a Qi/PMA receiver coil. Using this coil for transmitter mode leads to many compromis-es and not all Qi certified receivers will work with this kit. For the Tx mode evaluation we recommend to use theSTEVAL-ISB043V1 wearable receiver kit as a receiver.
UM2289Transmitter mode
UM2289 - Rev 2 page 4/26
Figure 5. STEVAL-ISB042V1 GUI operation mode
1.4 STWLC33 NVM configurationThe STWLC33 NVM configuration is the same default configuration as in STWLC33 samples (see STWLC33 da-tasheet).
1.4.1 Board overviewThe STEVAL-ISB042V1 evaluation board default configuration has good performance.
The board features:• STWLC33 evaluation board with Würth Elektronik dual mode coil (760308102207)• Qi 1.2 compliant, supporting extended power profile: up to 15 W/10 V maximum output power• Backward compatible with Qi baseline power profile: up to 5 W/5 V maximum output power• PMA-SR1 (AirFuel inductive) compliant: 5 W/5.6 V maximum output power• Transmitter function based on Qi protocol to charge wearable devices using the same Rx coil (up to 3 W
power)• Total system efficiency up to 80%• Configurable GPIOs for status indication• I²C interface for communication with the host system• Foreign object detection (FOD)• Complete kit (IC, firmware)• RoHS compliant
1.5 GUI: I²C register accessMost fields in the GUI application correspond to a single I²C register.(For further details, see STWLC33 datasheeton www.st.com.)
Many registers are accessible in receiver or transmitter mode only.
Before accessing the registers, you must check the actual operation mode in the Sys_Op_Mode register.
1.5.1 Rx mode registersThe Registers tab contains three sub-tabs related to Rx mode I²C register controls.
Through the Interrupt registers sub-tab, you can monitor the following registers:• Status_Rx• INT_Rx• INT_Enable_Rx• INT_Clear_Rx
The GUI directly reads or writes the target register.
The Interrupt clear button first writes the INT_Clear_Rx register and then writes 1 in the Clr_Int bit in Comregister.
UM2289STWLC33 NVM configuration
UM2289 - Rev 2 page 5/26
Figure 6. GUI Rx mode: Interrupt registers sub-tab
The Setup and measurement registers sub-tab controls registers and measurement values.
VOUT_set or ILIM_set modifications are immediate.
The default values are loaded automatically from NVM after wireless operating standard detection.
Important: Refer to 2 Configuration guidelines before changing the values.
The Power transfer termination consists of two steps:• writing the EPT register;• writing 1 in the S_EPT bit in Com register.
AD conversion results provide immediate VRECT and VOUT voltages as well as die temperature and output cur-rent during power transfer.
RXID and PRMC_ID registers become active after wireless standard detection and provide an easy-to-read self-ID (either Qi ID or PMA ID).
If the STWLC33 receiver is placed on a PMA pad that supports advertising, the advertising ID is captured and canbe read through PMA ADV registers.
UM2289GUI: I²C register access
UM2289 - Rev 2 page 6/26
Figure 7. GUI Rx mode: Setup and measurement registers sub-tab
The Qi – Proprietary packets sub-tab allows sending any Qi packet and (in Qi 1.2 only) receive the responsefrom the transmitter (both pattern type or data type responses are supported).
Figure 8. GUI Rx mode: Qi – Proprietary packets sub-tab
1.5.2 Tx mode registersAfter entering the mode as described in 1.3 Transmitter mode, the TX mode tab lets you monitor the followingregisters:• Status_Tx• INT_Tx• INT_Enable_Tx• INT_Clear_Tx
The GUI directly reads or writes the target register.
UM2289GUI: I²C register access
UM2289 - Rev 2 page 7/26
The Interrupt clear button first writes the INT_Clear_Tx register and then writes 1 in the Clr_Int bit in Com reg-ister.
Tx frequency setup allows modifying the regulation control algorithm minimum and maximum frequency and thestarting ping frequency.
Note: The optimal ping frequency for the STEVAL-ISB042V1 evaluation board is approximately 130 kHz.ASK demodulation thresholds parameter defines the ASK receiver sensitivity.
Figure 9. GUI Rx mode: TX mode tab
1.6 GUI: NVM configuration access
1.6.1 Qi NVM configurationThe Qi configuration tab contains manufacturer and device identifiers sent over the Qi protocol.
The tab contains also default values for the VOUT voltage, Input current limit and Interrupt enable registerswhich can be configured separately for baseline power profile (BPP) operation and for extended power profile(EPP). BPP values are loaded in the registers and subsequently updated if EPP is negotiated.
STWLC33 automatically terminates the power transfer if the load is below a certain threshold for a certain periodof time. By default, this feature is eliminated by setting the lowest possible current and the longest possible time.
Note: Qi specification does not require this feature.To maintain the Qi foreign object detection feature accurate, you must provide the correct values representing thecoil parameters and the mechanical setup.
The evaluation kit contains components with the correct values to be used.
But, if, for example, the coil is replaced by another type of coil, you must update the following parameters:• FOD_A• FOD_B (different values for BPP and EPP)• FOD_C (same value for BPP and EPP)• Reference quality factor (for EPP only)
UM2289GUI: NVM configuration access
UM2289 - Rev 2 page 8/26
Figure 10. GUI: Qi configuration tab
1.6.2 PMA NVM configurationThe PMA configuration tab contains the RXID identifier sent over the PMA protocol.
The tab contains also default values for the VOUT voltage, Input current limit and Interrupt enable registers.
The PMA specification requires that the receiver automatically terminates the power transfer if the load is below acertain threshold for a certain period of time.
If the power transfer termination is controlled by the host system, the STWLC33 feature can be eliminated (bysetting zero current and maximum possible time).
Figure 11. GUI: PMA configuration tab
1.6.3 Platform NVM configurationThis tab allows assigning GPIO functions related to Rx mode only.
UM2289GUI: NVM configuration access
UM2289 - Rev 2 page 9/26
In Tx mode, all the pins are inputs with no function.
In the STEVAL-ISB042V1 evaluation board, the LED diode (D6) is controlled by GPIO2 pin.
Figure 12. GUI: platform configuration tab
1.6.4 Generic load/save NVM accessThe NVM tab allows the backup of the current NVM configuration into a file or loading a new one from a file.
Figure 13. GUI: NVM tab
UM2289GUI: NVM configuration access
UM2289 - Rev 2 page 10/26
2 Configuration guidelines
2.1 Changing VOUT voltage: constraintsThe power LDO supports setting VOUT from 3.5 to 12.5 V; but, selecting an appropriate VOUT value is morecomplex and involves other aspects in the system, like:1. OVP and margin for modulation (especially when using VOUT higher than 9 V): the first line OVP protec-
tion is the pre-clamp with fixed trigger at 13.5 V on VRECT node. During modulation (packet data sent fromRx to Tx), the voltage on VRECT rises on the basis of conditions like Tx/Rx coil parameters, loading current,VOUT voltage and so on. The VOUT setting must be always low enough to maintain VRECT during modula-tion under the pre-clamp level. The safe VOUT voltage for the STEVAL-ISB042V1 evaluation board is 10 V.The user should not set a higher value unless previously verified (via an oscilloscope) that the VRECT mod-ulation has enough margin with respect to the pre-clamp threshold.
2. Tx coil voltage and Tx/Rx coil ratio: the whole system can be compared to a transformer where the coilratio defines the transformation ratio. The transmitter circuits and the Tx coil are designed to operate withinthe expected optimal range in which the Rx coil and VOUT voltage should fit. If the configured VOUT voltageis too high or too low, it shifts the whole system out of the optimal range. The right VOUT voltage for theSTEVAL-ISB042V1 evaluation board is roughly 4 to 5.5 V with 5 W transmitters and 8 to 10 V with 15 Wtransmitters. Using a different output voltage may require a different Rx coil and input resonant circuit capac-itors.
2.2 Input current limitThe power LDO is able to limit the output current. This limitation starts softly reducing the VOUT voltage evenbefore reaching the limit.
2.3 Minimal loadAll wireless systems are designed to transfer power. If power is not being transferred, it becomes hard to maintainRx-to-Tx communication.
STWLC33 is equipped with a dummyload circuit that increases the load by consuming the power when no outputload is present. Due to heat dissipation the dummy consumption is limited to tens of milliamps.
Even if this should be enough to maintain communication with most transmitters, it is recommended to alwaysapply at least 100 mA.
UM2289Configuration guidelines
UM2289 - Rev 2 page 11/26
3 Performance charts
3.1 Baseline power profile (BPP) Rx mode performanceThe STEVAL-ISB042V1 evaluation board performance in BPP has been evaluated through a Qi 1.2 BPP certifiedtransmitter. The overall system efficiency is above 78%.
Figure 14. STEVAL-ISB042V1 evaluation board performance: efficiency vs output power in BPP
The output voltage regulation is maintained under the threshold of a 1% difference from no load to full load.
Figure 15. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in BPP
3.2 Extended power profile (EPP) Rx mode performanceThe STEVAL-ISB042V1 evaluation board performance in EPP has been evaluated through a Qi 1.2 EPP certifiedtransmitter capable of delivering up to 15 W at 10 V output voltage. The overall system efficiency is above 80%.
UM2289Performance charts
UM2289 - Rev 2 page 12/26
Figure 16. STEVAL-ISB042V1 evaluation board performance: efficiency vs load in EPP
0
10
20
30
40
50
60
70
80
90
1 3 5 7 11 13 15 17
Effic
ienc
y (%
)
9Rx Output power (W)
The output voltage regulation is maintained under the threshold of a 0.15% difference from no load to 10 W loadand 1.5% from no load to full load.
Figure 17. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in EPP
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 2 4 6 10 12 14 16
Rx O
utpu
t vol
tage
(V)
8Rx Output power (W)
3.3 TX mode performanceThe STEVAL-ISB042V1 evaluation board performance in Tx mode has been evaluated through the STEVAL-ISB043V1 wearable receiver. The overall system efficiency is above 70%.
UM2289TX mode performance
UM2289 - Rev 2 page 13/26
Figure 18. STEVAL-ISB042V1 evaluation board performance: efficiency vs output power in TX mode
0
10
20
30
40
50
60
70
80
0.500 1.000 1.500 2.000 2.500 3.000
Effic
ienc
y (%
)
Rx Output Power (W)
UM2289TX mode performance
UM2289 - Rev 2 page 14/26
4 Schematic diagrams
Figure 19. STEVAL-ISB042V1 circuit schematic
100n
FCS
1
2.2n
F
CPA
R
100n
FCS
2
15nF
CBO
OT2
15nF
CBO
OT1
47nF
CM2
47nF
CM1
51k
R4
VIO
FLA
SHRE
SET/
EN
INT
SCL
SDA
4k7
R1
4k7
R2
1k5
R3 1 2
D1
INT
100n
F
C7
10µFC3
V5V
PGN
DPG
ND
PGN
DPG
ND
100n
FCS
3
PGN
D
100n
FCS
4
V5V
1.5n
FCF
LT1
10µFC4
1µF
C6
100n
F
CCL2
100n
F
CCL1
SCL
SDA
INT
PGN
D
RESE
T/EN
10µFC1
10µFC2
PGN
D
15R
RCL
22nF
CFLT
2
10k
RFLT
16.8n
FCF
LT3
68k
RFLT
2
620R
RFLT
3
12
Q1
PGN
D
PGN
D
PGN
D12
V
D3
D Z
ener
PGN
D
1µF
C7a
100n
F
C6a
100k
R6
100k
R7
PGN
D
10µFC2
a10
0nF
C2b
SDA
SCL
INT
GP0
GP1
GP2
GP3
GP4
12
J5 PGN
D
VIO
FLA
SH
123456789101112J4 H
eade
r 12
PGN
D
V18
GP0
GP1
GP2
GP3
GP4
12
J3 PGN
D
VRE
CT
VRE
CT
12
J2 PGN
D
VO
UT
VO
UT
12
J6
PGN
D
1
23
T1
FDV303N1 2
D6
1k5
R8
GP2
P
1uF/6.3V
C14
VS2
BST2
BST1
123J8 H
eade
r 3
PGN
DSD
ASC
L
12
34
56
78
J7 Hea
der 4
X2
PGN
D
Rx RNTC
PGN
DV18
VS2
12V
D4 D
Zen
er
12
P3
VIO
FLA
SHV
18
GN
DDP
DM
VBU
S
SHIE
LD
J1
PGN
D
VO
UT
1 2
P9
SCL
A3
SDA
B3
INT-
NC3 A
2 B2
GPI
O0
A4
GPI
O1
B4
GPI
O2
C4
GPI
O3
A5
GPI
O4
C5
/EN
B5
V5V
F1
GND C1
PGND I1
AGND C6
BST2G6
CMBB6
CM2A6
AC2H5
AC1H1
CM1A1
CMAB1
BST1G1V
S1G
4
VS2
H4
HV
OD
C2
VRE
CT
OU
TD
1
V18
F6
PGND PGND PGND PGND PGND
OU
TO
UT
OU
TO
UT
OU
T
VRE
CTV
RECT
_SV
RECT
VRE
CTV
RECT
VRE
CTV
RECT
AC2 AC2
AC1 AC1
IO1
STW
LC33
UM2289Schematic diagrams
UM2289 - Rev 2 page 15/26
5 Bill of materials
Table 1. STEVAL-ISB042V1 bill of materials
Item Q.ty Ref. Part / Value Description Manufacturer Order code
1 1 IO1 CSP 6x9, 400 μmpitch
Wireless powerreceiver
ST STWLC33
2 4 CS1, CS2, CS3,CS4
100 nF/50 V, SMD0402
Capacitors Murata GRM155R61H104KE19
3 1 CPAR 3.9 nF/50 V, SMD0402
Capacitors Murata GRM155R71H392KA01
4 2 CBOOT1,CBOOT2
15 nF/10 V, SMD0402
Capacitors Murata GRM155R71H153KA12
5 2 CM1, CM2 47 nF/50 V, SMD0402
Capacitors Murata GRM155R61H473KE19
6 2 CCL1, CCL2 100 nF/50 V, SMD0402
Capacitor Murata GRM155R61H104KA
7 5 C1, C2, C2a, C3,C4
10 μF/25 V, SMD0805
Capacitors Murata GRM21BR61E106KA73L
8 1 C2b 100 nF/25 V, SMD0201
Capacitor Samsung CL03A104KA3NNNC
9 1 C6 1 μF/6.3 V, SMD0201
Capacitor Samsung CL03A105MQ3CSNH
10 2 C6a, C7 100 nF/25 V, SMD0402
Capacitors Murata GRM155R61E104KA87D
11 1 C7a 1 μF/10 V, SMD0402
Capacitor Murata GRM155R61A105KE15
12 1 C14 1 μF/10 V, SMD0603
Capacitor Murata GRM188R61A105MA
13 1 RCL 30 Ω, SMD 0805 Resistor Panasonic ERJ-P6WF30R0V
14 0 D1 SMD 0402 Any Not assembled
15 2 D3, D4 SOD882 Protection di-ode
NXP PESD12VV1BL
16 0 D5, D2 SOD882 Any Assembled short
17 1 D6 2 mA, SMD 0402 Red LED Any
18 1 Q1 Schottky diode ST BAT48
19 1 RFLT1 10 kΩ±1%, SMD0402
Resistor Any
20 1 RFLT2 68 kΩ±1%, SMD0402
Resistor Any
21 1 RFLT3 620 Ω±1%, SMD0402
Resistor Any
22 2 R1, R2 4k7 SMD 0402 Resistors Any
23 2 R3, R8 1k5, SMD 0402 Resistors Any
24 1 R4 51 kΩ, SMD 0402 Resistor Any
25 2 R6, R7 100 kΩ, SMD0402
Resistors Any
UM2289Bill of materials
UM2289 - Rev 2 page 16/26
Item Q.ty Ref. Part / Value Description Manufacturer Order code
26 1 CFLT1 1.5 nF/50 V SMD0402
Capacitor Murata GRM155R71H152KA01
27 1 CFLT2 22 nF/50 V SMD0402
Capacitor Murata GRM155R71H223KA12
28 1 CFLT3 6.8 nF/50 V SMD0402
Capacitor Murata GRM155R71H682KA88
29 1 RX 30 kΩ SMD 0603 Resistor Any
30 0 RNTC SMD 0603 Resistor Any Not assembled
31 1 T1 SOT23 Digital FET Fairchild FDV303
32 0 J1 Any Not assembled
33 3 J2, J3, J5 THT 2.54 mmpitch
2-pin header Any
34 1 J4 THT 2.54 mmpitch
12-pin header Any
35 1 J6 THT 2.54 mmpitch
Coil wire con-nection
Any
36 1 J7 THT 2.54 mmpitch
2x4-pin header Any
37 1 J8 THT 2.54 mmpitch
3-pin header Any
38 1 P3 Soldered Solder option Any
39 1 P9 Open Any Open
40 1 L 8 μH Coil connectedto J6
Wurth 760308102207
41 1 62x62x21 mm Plastic frame Any
42 1 3x10 mm 2x wood screw Any
UM2289Bill of materials
UM2289 - Rev 2 page 17/26
6 Board layout
Figure 20. STEVAL-ISB042V1: top silkscreen and pads
Figure 21. STEVAL-ISB042V1: copper layer 1
UM2289Board layout
UM2289 - Rev 2 page 18/26
Figure 22. STEVAL-ISB042V1: copper layer 2
Figure 23. STEVAL-ISB042V1: copper layer 3
UM2289Board layout
UM2289 - Rev 2 page 19/26
Figure 24. STEVAL-ISB042V1: copper layer 4
UM2289Board layout
UM2289 - Rev 2 page 20/26
7 References
Freely available on www.st.com:
1. STWLC33 datasheet.
UM2289References
UM2289 - Rev 2 page 21/26
Revision history
Table 2. Document revision history
Date Version Changes
02-Oct-2017 1 Initial release.
22-Dec-2017 2 Updated Table 1. STEVAL-ISB042V1 bill of materials.
Added references to the STEVAL-ISB043V1 wearable receiver.
UM2289
UM2289 - Rev 2 page 22/26
Contents
1 Getting started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.1 Board configuration and test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Receiver mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Transmitter mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 STWLC33 NVM configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1 Board overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 GUI: I²C register access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.1 Rx mode registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.2 Tx mode registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 GUI: NVM configuration access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.1 Qi NVM configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.2 PMA NVM configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.6.3 Platform NVM configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.6.4 Generic load/save NVM access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2 Configuration guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.1 Changing VOUT voltage: constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Input current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Minimal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Performance charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.1 Baseline power profile (BPP) Rx mode performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Extended power profile (EPP) Rx mode performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 TX mode performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6 Board layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
UM2289Contents
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List of tablesTable 1. STEVAL-ISB042V1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Table 2. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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UM2289 - Rev 2 page 24/26
List of figuresFigure 1. STEVAL-ISB042V1 evaluation board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STEVAL-ISB042V1 evaluation board: receiver mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Figure 3. STEVAL-ISB042V1 evaluation board: transmitter mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 4. STEVAL-ISB042V1 GUI Tx mode tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 5. STEVAL-ISB042V1 GUI operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 6. GUI Rx mode: Interrupt registers sub-tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figure 7. GUI Rx mode: Setup and measurement registers sub-tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 8. GUI Rx mode: Qi – Proprietary packets sub-tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 9. GUI Rx mode: TX mode tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Figure 10. GUI: Qi configuration tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 11. GUI: PMA configuration tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 12. GUI: platform configuration tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 13. GUI: NVM tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 14. STEVAL-ISB042V1 evaluation board performance: efficiency vs output power in BPP . . . . . . . . . . . . . . . . . . 12Figure 15. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in BPP. . . . . . . . . . . . . . . 12Figure 16. STEVAL-ISB042V1 evaluation board performance: efficiency vs load in EPP . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 17. STEVAL-ISB042V1 evaluation board performance: output voltage vs output power in EPP. . . . . . . . . . . . . . . 13Figure 18. STEVAL-ISB042V1 evaluation board performance: efficiency vs output power in TX mode. . . . . . . . . . . . . . . 14Figure 19. STEVAL-ISB042V1 circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 20. STEVAL-ISB042V1: top silkscreen and pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 21. STEVAL-ISB042V1: copper layer 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 22. STEVAL-ISB042V1: copper layer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 23. STEVAL-ISB042V1: copper layer 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 24. STEVAL-ISB042V1: copper layer 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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