IDT P9221-R-EVK User manual

P9221-R-EVK Evaluation Board User Manual
© 2016 Integrated Device Technology, Inc.
1
December 16, 2016
P9242-R Transmitter Evaluation Board Transmitter Coil
P9221-R-EVK
Description
The P9221-R-EVK Mass-Market Evaluation Board demonstrates
the features and performance of the P9221-R 15W Wireless
Power Receiver (RX). It is intended to evaluate the functionality
and performance of P9221-R. The P9221-R-EVK offers the
flexibility to program parameters, such as output voltage, over
current limit threshold, and external temperature sensing function.
It also enables tuning the Foreign Object Detection (FOD) by
connecting the center tap of the on-board resistor dividers to each
of these pins. The printed circuit board (PCB) has four layers. The
P9221-R Evaluation Board is designed to function with the
P9242-R Transmitter Evaluation Board, which is ordered sep-
arately. It can also be used with the user’s WPC-1.2.2 compliant
transmitter.
The high-efficiency, turnkey reference design is supported by
comprehensive online, digital resources to significantly expedite
design-in effort and enable rapid prototyping. The total active area
is optimized to 28 mm x 15 mm.
P9221-R-EVK Mass-Market Evaluation Board
Features
P9221-R evaluation board with support for WPC-1.2.2
Up to 15W output power
Selectable output voltage: 12V or 9V
Adjustable over-current limit
External FOD tuning
Power transfer LED indicator
Alignment guide information using the PCB coils
4-layer PCB
Total active area: 420 mm2
Fully assembled with test points and coil fixture
Kit Contents
P9221-R-EVK Mass-Market Evaluation Board
P9221-R-EVK Connected to P9242-R Transmitter Board

P9221-R-EVK Evaluation Board User Manual
© 2016 Integrated Device Technology, Inc.
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December 19, 2016
Important Notes
Disclaimer
Integrated Device Technology, Inc. and its affiliated companies (herein referred to as “IDT”) shall not be liable for any damages arising out of defects resulting
from
(i) delivered hardware or software
(ii) non-observance of instructions contained in this manual and in any other documentation provided to user, or
(iii) misuse, abuse, use under abnormal conditions, or alteration by anyone other than IDT.
TO THE EXTENT PERMITTED BY LAW, IDT HEREBY EXPRESSLY DISCLAIMS AND USER EXPRESSLY WAIVES ANY AND ALL WARRANTIES,
WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND OF
FITNESS FOR A PARTICULAR PURPOSE, STATUTORY WARRANTY OF NON-INFRINGEMENT, AND ANY OTHER WARRANTY THAT MAY ARISE BY
REASON OF USAGE OF TRADE, CUSTOM, OR COURSE OF DEALING.
Restrictions in Use
IDT’s P9221-R-EVK Mass Market Evaluation Board is designed for evaluation purposes only. It must not be used for module production or production test
setups.
Contents
1. Setup ............................................................................................................................................................................................................4
1.1 Required or Recommended User Equipment......................................................................................................................................4
1.2 Kit Hardware Connections...................................................................................................................................................................4
2. Usage Guide.................................................................................................................................................................................................5
2.1 Overview of the P9221-R-EVK ............................................................................................................................................................5
2.2 VOUT (Output Voltage) Modification ...................................................................................................................................................5
2.3 Alignment Aid –ALIGNX and ALIGNY ................................................................................................................................................6
2.4 Adjustment of Over-Current Limit ........................................................................................................................................................8
2.5 External Temperature Sensing –TS ...................................................................................................................................................9
2.6 Receiver Coil .......................................................................................................................................................................................9
3. Schematics, Bill of Materials (BOM), and Board Layout.............................................................................................................................10
3.1 P9221-R Evaluation Board Schematics.............................................................................................................................................10
4. Bill of Materials (BOM)................................................................................................................................................................................11
5. Board Layout ..............................................................................................................................................................................................12
6. Ordering Information...................................................................................................................................................................................15
7. Revision History..........................................................................................................................................................................................15

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List of Figures
Figure 1. Evaluation Kit Connections using the P9242-R Transmitter Evaluation Board ...................................................................................4
Figure 2. P9221-R V2.1 Evaluation Board Features...........................................................................................................................................5
Figure 3. R33 and R34 PCB Location ................................................................................................................................................................6
Figure 4. Recommended Structure of the X-Y Alignment Coil............................................................................................................................7
Figure 5. R38 and R22 PCB Location ................................................................................................................................................................8
Figure 6. Over-Current Limit vs. ILIM Pin Voltage ..............................................................................................................................................8
Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor ......................................................................................9
Figure 8. Silkscreen –Top of Board .................................................................................................................................................................12
Figure 9. Silkscreen –Bottom of Board ............................................................................................................................................................12
Figure 10. Copper –Top Layer...........................................................................................................................................................................13
Figure 11. Copper L2 Layer................................................................................................................................................................................13
Figure 12. Copper L3 Layer................................................................................................................................................................................14
Figure 13. Copper Bottom ..................................................................................................................................................................................14
List of Tables
Table 1. Setting the Output Voltage ..................................................................................................................................................................5
Table 2. Recommend Coil Manufacturer...........................................................................................................................................................9
Table 3. Application Board BOM .....................................................................................................................................................................11

P9221-R-EVK Evaluation Board User Manual
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December 19, 2016
1. Setup
1.1 Required or Recommended User Equipment
The following additional lab equipment is required for using the kit:
P9242-R Transmitter Evaluation Board or any WPC-1.2.2 compliant transmitter.
Power supply or 12V/2A AC adaptor
1.2 Kit Hardware Connections
Follow these procedures to set up the kit as shown in Figure 1.
1. Set up the P9242-R Evaluation Board (or user transmitter) according to the board’s user manual
2. Place the P9221-R-EVK on the transmitter (TX) pad with the components facing up as shown in Figure 1.
3. Verify that the green LED is illuminated –coupling has been established.
4. Connect wires to the VOUT and GND test points to measure output voltage and apply a load.
Figure 1. Evaluation Kit Connections using the P9242-R Transmitter Evaluation Board
P9242-R Transmitter Evaluation Board Transmitter Coil
P9221-R-EVK
Green LEDs illuminate when connection has been established

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2. Usage Guide
2.1 Overview of the P9221-R-EVK
Figure 2. P9221-R V2.1 Evaluation Board Features
FOD Offset
Adjustment
(RPO)
External Temperature
Sensing Resistor
Output Voltage Adjustment (VOSET)
FOD Gain
Adjustment
(RPG)
Over-Current
Limit Adjustment
(ILIM)
Y- Alignment Guide Voltage (ALGY)
X- Alignment Guide Voltage (ALGX)
SCL SDA GND
GND
VRECT
GND
VOUT
Receiver Coil
IDT P9221-R IC
Interrupt Flag
2.2 VOUT (Output Voltage) Modification
The P9221-R output voltage can be set to 9V or 12V by changing the R34 or R33 resistors value; see Table 1. The default output voltage is
set to 12V. For applications where the transmitter is capable of delivering only 5W, the P9221-R will automatically switch to 5V to ensure 5W
power delivery. The 5W option can be disabled by adding R33.
Table 1. Setting the Output Voltage
R34 (kΩ)
R33 (kΩ)
Output Voltage (V)
5V Output option
10
Open
12 (Default)
Enable
10
30
12
Disable
OPEN
10
9
Enable
10
3.3
9
Disable

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Figure 3. R33 and R34 PCB Location
2.3 Alignment Aid –ALIGNX and ALIGNY
The signal magnitude on the P9221-R’s ALIGNX and ALIGNY pins provides directional alignment information by measuring the phase
between the input power AC signal and the horizontal (ALIGNX) and vertical (ALIGNY) alignment signals. Once the signal is measured in the
analog-to-digital converter, the alignment information is represented by two 8-bit signed numbers, which can be read via the I2C interface from
the Align_X and Align_Y registers (see the P9221-R Datasheet).
The difference in the electromotive force (EMF) voltage of the two coils can be represented by the amount of magnetic flux, which depends on
the misalignment position of the receiver coil relative to the transmitter coil. With the combination of two symmetrical coils on the vertical (Y)
axis and horizontal (X) axis, it is possible to sense alignment in two dimensions as shown in Figure 4. The trace length and width were
designed with 452.12mm and 0.254mm respectively for each segment coil on the P9221-R Evaluation Board, which was assembled with the
AMOTECH ASC-504060E00-S00 coil as shown in Figure 4.

P9221-R-EVK Evaluation Board User Manual
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Figure 4. Recommended Structure of the X-Y Alignment Coil

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2.4 Adjustment of Over-Current Limit
The P9221-R includes the programmable current limit feature for protecting the device in the event of an over-current or short-circuit fault
condition. If the output current exceeds the programed threshold, the P9221-R will limit the load current by reducing the output voltage. The
current limit should be set to 130% of the maximum output current by setting the voltage on the ILIM pin as shown in Figure 6 by adjusting
R22 while keeping R38 as 10kΩ, which is connected to the 1.8V supply. The default value for the over-current limit is set to 1.6A.
Figure 5. R38 and R22 PCB Location
Figure 6. Over-Current Limit vs. ILIM Pin Voltage
0
200
400
600
800
1000
1200
1400
1600
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
ILIM[mA]
VILIM [V]

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2.5 External Temperature Sensing –TS
The P9221-R includes an optional temperature sense input pin, TS, used to monitor a remote temperature, such as for a coil or a battery
charger.
The TS pin voltage can be calculated by Equation 1.

    

 
Equation 1
Where NTC is the thermistor`s resistance and R19 is the pull-up resistor connected to the 1.8V supply voltage on the P9221-R Evaluation
Board. The over–temperature shutdown is triggered if the voltage on the TS pin is lower than 0.6V. The RTS is not populated on the P9221-R
Evaluation Board.
Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor
2.6 Receiver Coil
The following coil is recommended with P9221-R receiver for 15W applications for optimum performance. The recommended vendor has
been tested and verified.
Table 2. Recommend Coil Manufacturer
Output Power
Vendor
Part number
Inductance at 100kHz
ACR at 20°C
15W
AMOTECH
ASC-504060M22-S00
8.2µH
220mΩ

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D1 LED
C12 NP
C10 10uF
INT INT
C9
3.3nF
R18
NP
VDD5V
D6
5.1V R8 0
C25
NP
ALGX
R33
NP
R39
10k C19
0.1uF
(SDA)
INT
C21 10uF
C16
15nF
U1
P9221-R
COMM1
A1
COMM2
A6
RSV4
B1
RSV5
B6
EN B5
ALIGNX A2
SCL A3
VOSET A4
RPPG A5
SDA B3
ALIGNY B2
ILIM B4
RPPO C4
DEN C5
OUT D1
INT C3
SINK C2
OUT D2 OUT D3 OUT D4 OUT D5 OUT D6
VRECT
E1
VRECT
E2
VRECT
E5
VRECT
E6
VRECT
F2
VRECT
F3
VRECT
F4
VRECT
F5
AC1
G2
AC1
H1
AC1
H2
AC2
G5
AC2
H5
AC2
H6
BST1
G1
BST2
G6
GND
C1
GND
C6
GND
J1
GND
J2
GND
J3
GND
J4
GND
J5
GND
J6
VDD5V F1
VDD18 F6
RSV3 G3
RSV2 H3
RSV1 G4
TS H4
C20 1uF
R19 10K
/EN
I2CRAIL
VOUT
VOSET
P9221-R MM EV Board V2.1
C31 0.1uF
C8
15nF
VRECT
R35 0
J1
I2C
1 2 3 4 5
L1
SCL
R17 10k
VPP18
VDD5V
R30
10K
R22
NP
R2 36
R14
5.1k
C3
100nF/50V
RPO C11 10uF
R13
5.1k
THM
C23 0.1uF
GND1
R28
10K
R16 10K
VRECT
R29
10K
(SCL)
C7
NP
VOSNS
ILIM R34
10k R23
10k
C22 10uF
VDD5V
R38
10K
RX Power Coil
AlignX coil
C18
1uF
C6
47nF
VPP18
Vrect
R1 5.1k
ALGY
THM
C2
100nF/50V
D7 5.1V
U2
NP
A0 1 A1 2 A2 3
VSS 4
SDA
5SCL 6WP 7VCC 8
E_PAD
9
VPP18
RTS NP
VPP18
C1
100nF/50V
AlignY coil
WP
C5
100nF/50V
LC
SDA
R27
10K
OD3
C33 10uF
VOUT
DEN
AC2T
TS
C15
NP GND
R6 NP
R15 10K
OD4
GCOM
AC2
RPG
C14
47nF
3. Schematics, Bill of Materials (BOM), and Board Layout
3.1 P9221-R Evaluation Board Schematics

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4. Bill of Materials (BOM)
Table 3. Application Board BOM
Item
Reference
Quantity
Value
Description
Part Number
PCB Footprint
1
AC2T, VDD5V, VPP18,
VOSET, TS, SDA, SCL,
RPO, RPG, INT, ILIM,
GCOM, DEN, ALGY,
ALGX, /EN
16
PTH_TP
Test Pad
10MIL_35PAD
2
AC2, LC
2
NP
Test Point
test_pt_sm_135x70
3
C1, C2, C3, C5
4
100nF/5
0V
CAP CER 0.1UF 50V X5R 0402
GRM155R61H104KE19D
402
4
C6, C14
2
47nF
CAP CER 0.047UF 50V X7R 0402
C1005X7R1H473K050BB
402
5
C7, C15
2
NP
CAP CER 0.047UF 50V X7R 0402
C1005X7R1H473K050BB
402
6
C8, C16
2
15nF
CAP CER 0.015UF 50V X7R 0402
GRM155R71H153KA12J
402
7
C9
1
3.3nF
CAP CER 3300PF 50V X7R 0402
CL05B332KB5NNNC
402
8
C10, C11, C21, C22,
C33
5
10uF
CAP CER 10UF 25V X5R 0603
CL10A106MA8NRNC
603
9
C12
1
NP
CAP CER 10UF 25V X5R 0603
CL10A106MA8NRNC
603
10
C18
1
NP
CAP CER 1UF 10V X5R 0402
GRM155R61A105KE15D
402
11
C20
1
1uF
CAP CER 1UF 10V X5R 0402
GRM155R61A105KE15D
402
12
C19, C25, C31
3
0.1uF
CAP CER 0.1UF 10V X5R 0201
C0603X5R1A104K030BC
201
13
C23
1
0.1uF
CAP CER 0.1UF 25V X5R 0201
CL03A104KA3NNNC
201
14
D1
1
LED
LED GREEN CLEAR 0603 SMD
150060GS75000
0603_diode
15
D6,D7
2
5.1V
DIODE ZENER 5.1V 100MW 0201
CZRZ5V1B-HF
201
16
GND1, VRECT, VOUT,
VOSNS, GND
5
Test
Point
TEST POINT PC MINIATURE SMT
5015
test_pt_sm_135x70
17
L1
1
RX coil
AMOTECH, Rx Power Coil
ASC-504060M22-S00
10MIL_35PAD
18
J1
1
NP
HEADER_1X5_0P1PITCH60P42D
68002-205HLF
header_1x5_0p1Pitch60p42d
19
RTS
1
NP
NTC2
20
R1, R13, R14
3
5.1k
RES SMD 5.1K OHM 5% 1/16W 0402
MCR01MRTJ512
402
21
R2
1
36
RES SMD 36 OHM 5% 1/2W 0805
ERJ-P06J360V
805
22
R6
1
NP
RES SMD 0.0OHM 1/10W 0402
ERJ-2GE0R00X
402
23
R8
1
0
RES SMD 0.0OHM 1/10W 0402
ERJ-2GE0R00X
402
24
R15, R16
2
10K
RES SMD 10KOHM 1% 1/10W 0603
RC0603FR-0710KL
603
25
R17, R19, R23, R27,
R28, R29, R30, R34,
R38, R39
10
10k
RES SMD 10K OHM 5% 1/10W 0402
ERJ-2GEJ103X
402
26
R18, R22, ,R33
3
NP
RES SMD 10K OHM 5% 1/10W 0402
ERJ-2GEJ103X
402
27
R35
1
0
RES SMD 0.0OHM JUMPER 1/10W 0603
MCR03EZPJ000
603
28
U1
1
P9221-R
Wireless power receiver
P9221-R
csp52_2p64x3p94_0p4mm
29
U2
1
NP
IC EEPROM 128KBIT 400KHZ 8TDFN
24AA128T-I/MNY
TDFN08

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5. Board Layout
Figure 8. Silkscreen –Top of Board
Figure 9. Silkscreen –Bottom of Board

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Figure 10. Copper –Top Layer
Figure 11. Copper L2 Layer

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Figure 12. Copper L3 Layer
Figure 13. Copper Bottom

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6. Ordering Information
Orderable Part Number
Description
P9221-R-EVK
P9221-R-EVK Evaluation Board
7. Revision History
Revision Date
Description of Change
December 19, 2016
Initial release of document.
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specifications and operating parameters of the described products are determined in an independent state and are not guarante ed to perform the same way when installed in customer products. The
information contained herein is provided without representation or warranty of any kind, whether express or implied, includin g, but not limited to, the suitability of IDT's products for any particular purpose,
an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey an y license under intellectual
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