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P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 1 December 18, 2017
P9242-R-EVK MM Evaluation Board (Transmitter)
Transmitter Coil
P9221-R-EVK MM
Evaluation Board
(Receiver)
Description
The IDT P9221-R-EVK Mass-Market (MM) Evaluation Board dem-onstrates the features and performance of the P9221-R 15W Wireless Power Receiver (Rx). The P9221-R-EVK offers the flexi-bility to program parameters, such as the output voltage, over-current limit threshold, and external temperature sensing function. It also allows tuning the Foreign Object Detection (FOD) feature by varying values in the resistor divider connected to the VOSET/ Q-Fact pin.
The P9221-R-EVK MM Evaluation Board is designed to function as the receiver in a wireless power transfer system using IDT’s P9242-R-EVK MM Evaluation Board as the power transmitter. The P9242-R-EVK is ordered separately. The P9221-R-EVK can also be usedwith the user’s WPC-1.2 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 printed circuit board (PCB) has four layers. The total active area is optimized to 28mm x 15mm.
Kit Contents
P9221-R-EVK Mass-Market Evaluation Board
Features
P9221-R-EVK MM Evaluation Board supports WPC-1.2
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: 420mm2
Fully assembled with test points and coil fixture
P9221-R-EVK MM Evaluation Board
Wireless Power Transfer System using the P9221-R-EVK and P9242-R-EVK
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 2 December 18, 2017
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 Setting the Output Voltage and Reference Q-factor Value – VOSET/Q-Fact Pin ...............................................................................6
2.3 Alignment Aid – ALIGNX and ALIGNY ................................................................................................................................................7
2.4 Adjustment of Over-Current Limit ........................................................................................................................................................8
2.5 External Temperature Sensing and End of Charge – TS/EOC ...........................................................................................................9
2.6 Receiver Coil .....................................................................................................................................................................................10
3. P9221-R-EVK MM Evaluation Board Schematics ......................................................................................................................................11
4. Bill of Materials (BOM) ................................................................................................................................................................................12
5. Board Layout ..............................................................................................................................................................................................14
6. Ordering Information ...................................................................................................................................................................................17
7. Revision History ..........................................................................................................................................................................................17
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 3 December 18, 2017
List of Figures
Figure 1. Evaluation Kit Setup using the P9242-R-EVK MM Evaluation Board as the Transmitter ....................................................................4
Figure 2. P9221-R-EVK MM Evaluation Board V2.2 Features ...........................................................................................................................5
Figure 3. R33 and R34 Locations .......................................................................................................................................................................6
Figure 4. Recommended Structure of the X-Y Alignment Coil ............................................................................................................................7
Figure 5. R38 and R22 Location .........................................................................................................................................................................8
Figure 6. Over-Current Limit vs. ILIM Pin Voltage ..............................................................................................................................................9
Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor ....................................................................................10
Figure 8. Silkscreen – Top of Board .................................................................................................................................................................14
Figure 9. Silkscreen – Bottom of Board ............................................................................................................................................................14
Figure 10. Top Copper Layer ..............................................................................................................................................................................15
Figure 11. L2 Copper Layer ................................................................................................................................................................................15
Figure 12. L3 Copper Layer ................................................................................................................................................................................16
Figure 13. Bottom Copper Layer ........................................................................................................................................................................16
List of Tables
Table 1. Setting the Output Voltage and Reference Q-factor Value ..................................................................................................................6
Table 2. Setting the Over-Current Limit .............................................................................................................................................................8
Table 3. Recommend Coil Manufacturers .......................................................................................................................................................10
Table 4. P9221-R-EVK MM Evaluation Board BOM V2.2 ...............................................................................................................................12
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 4 December 18, 2017
1. Setup
1.1 Required or Recommended User Equipment
The following additional lab equipment is required for using the kit:
P9242-R-EVK MM Evaluation Board or any WPC-1.2 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-EVK 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 LEDs on both boards are illuminated indicating that coupling has been established.
4. Connect wires to the VOUT and GND test points to measure the output voltage and apply a load.
Figure 1. Evaluation Kit Setup using the P9242-R-EVK MM Evaluation Board as the Transmitter
P9242-R-EVK
Transmitter Coil
P9221-R-EVK
Green LEDs illuminate when
connection has been established.
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 5 December 18, 2017
2. Usage Guide
2.1 Overview of the P9221-R-EVK
Figure 2. P9221-R-EVK MM Evaluation Board V2.2 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
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 6 December 18, 2017
2.2 Setting the Output Voltage and Reference Q-factor Value – VOSET/Q-Fact Pin
The output voltage on the P9221-R is programmed by connecting the center tap of the divider network comprising external resistors R34 and R33 to the VOSET/Q-Fact pin as shown in the schematic in section 3. The output voltage can be set to 9V or 12V. The recommended settings for R33 and R34 are given in Table 1.
The default output voltage is set to 12V on the P9221-R-EVK MM Evaluation Board (R34 = 10kΩ; R33 = open). For applications where the transmitter is capable of delivering only 5W, the P9221-R will automatically switch to 5V output to ensure 5W power delivery. The 5W option can be disabled by changing R33 as described in Table 1. In this case, if the receiver is placed on a 5W transmitter, the receiver output pin will be high impedance.
The VOSET/Q-Fact pin also allows setting the Q-factor value by adjusting R34 and R33 as shown in Table 1. The default value is set to 103 on the P9221-R-EVK MM Evaluation Board. For development purposes, the Q-factor should be set to 20 to avoid prematurely triggering the Q-factor.
Table 1. Setting the Output Voltage and Reference Q-factor Value
Note: The default values on the P9221-R-EVK are indicated with blue shading.
Q Factor Value Setting
VOUT Setting (R34/R33 Values)
9V without 5V 9V with 5V 12V without 5V 12V with 5V
R34 R33 R34 R33 R34 R33 R34 R33
103 10kΩ 4.87kΩ Open 10kΩ 10kΩ 21kΩ 10kΩ Open
80 10kΩ 4.32kΩ 10kΩ 0.31kΩ 10kΩ 22.6kΩ 10kΩ 324kΩ
60 10kΩ 3.65kΩ 10kΩ 0.681kΩ 10kΩ 27.4kΩ 10kΩ 147kΩ
40 10kΩ 3.09kΩ 10kΩ 1.1kΩ 10kΩ 32.4kΩ 10kΩ 90.9kΩ
20 10kΩ 2.55kΩ 10kΩ 1.54kΩ 10kΩ 39.2kΩ 10kΩ 64.9kΩ
Figure 3. R33 and R34 Locations
R34
R33
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 7 December 18, 2017
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. After the signal is measured by 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-EVK MM Evaluation Board, which was assembled with the AMOTECH ASC-504060E00-S00 coil as shown in Figure 4.
Figure 4. Recommended Structure of the X-Y Alignment Coil
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 8 December 18, 2017
2.4 Adjustment of Over-Current Limit
The P9221-R has a programmable current limit function 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 recommended current limit setting is 120% of the maximum output current. The default value for the over-current limit is set to 1.6A. The ILIM pin allows changing the over-current limit value without modification of the firmware by selecting the values of R38 and R22 as shown in Table 2. R38 and R22 form a divider network from the 1.8V supply to ground with the center tap connected to the ILIM pin as shown in the schematic in section 3. The voltage at the ILIM pin sets the over-current limit. See Figure 6 for the relationship between the current limit and the voltage on the ILIM pin.
Table 2. Setting the Over-Current Limit
Note: The default values on the P9221-R-EVK are indicated with blue shading.
Voltage on ILIM Pin [V] R38 [kΩ] R22 [kΩ] Maximum Output
Current [A] Over-Current Limit [A]
Pull-up 10 Open 1.25 1.6
0.60 10 5.1 0.80 1
0.45 10 3.3 0.64 0.8
0.25 10 1.6 0.40 0.5
Figure 5. R38 and R22 Location
R38
R22
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 9 December 18, 2017
Figure 6. Over-Current Limit vs. ILIM Pin Voltage
2.5 External Temperature Sensing and End of Charge – TS/EOC
The P9221-R has a temperature sense input pin, TS, which can be used to monitor a remote temperature, such as a thermistor reading for a coil or a battery charger. The built-in comparator’s reference voltage is 0.6V and 0.1V in the P9221-R, and it is used for monitoring the voltage level on the TS/EOC pin as described by Equation 1.
VTS = VVDD18 ∗ NTC
R19 + NTC
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-EVK MM Evaluation Board. The over–temperature shutdown is triggered when the TS pin voltage is between 0.6V and 0.1V. The RTS is not populated on the P9221-R MM Evaluation Board.
When the TS/EOC pin is less than 0.1V, the End-of-Charge (EOC) function is activated, and the P9221-R will send the End-Power-Transfer (EPT) packet to the transmitter terminating the power delivery.
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
[m
A]
VILIM [V]
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 10 December 18, 2017
Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor
RTS
2.6 Receiver Coil
The ASC-504060E00-S00 coil is used in the kit. The following alternative coils are recommended for the P9221-R receiver for 15W applications for optimum performance. The recommended vendor coils have been tested and verified as shown in Table 3.
Table 3. Recommend Coil Manufacturers
Output Power Vendor Part Number Inductance at 100kHz ACR at 20°C Series Resonant Capacitance
15W AMOTECH ASC-504060E00-S00 8.2µH 220mΩ 400nF
15W TDK WR424245-13K2-G 11.2µH 170mΩ 300nF
15W SUNLORD SWA50R40H06C02B 8.4µH 150mΩ 400nF
15W WURTH 760308102207 8.0µH 80mΩ 400nF
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 11 December 18, 2017
3. P9221-R-EVK MM Evaluation Board Schematics
D1
LE
D
C1
2
NP
C1
0
10uF
INT
INT
SD
A
C9
3.3
nF
R1
8
NP
VD
D5
V
D6
5.1
VR
80
RS
V1
C2
5N
P
ALG
X
R3
3
NP
R3
9
10k
C1
90
.1u
F
C2
1
10uF
C1
615nF
U1
P9221-R
CO
MM
1A
1
CO
MM
2A
6
RS
V4
B1
RS
V5
B6
EN
B5
ALIGNXA2
SCLA3
VO
SE
T/Q
-Fa
ct
A4
RP
PG
A5
SDAB3
ALIGNYB2
ILIM
B4
RP
PO
C4
DE
NC
5
OU
TD
1
INTC3
SINKC2
OU
T1
D2
OU
T2
D3
OU
T3
D4
OU
T4
D5
OU
T5
D6
VR
EC
TE
1
VR
EC
T1
E2
VR
EC
T2
E5
VR
EC
T3
E6
VR
EC
T4
F2
VR
EC
T5
F3
VR
EC
T6
F4
VR
EC
T7
F5
AC
1G
2
AC
1_
1H
1
AC
1_
2H
2
AC
2G
5
AC
2_
1H
5
AC
2_
2H
6
BS
T1
G1
BS
T2
G6
PGNDC1
PGND1C6
PGND2J1
PGND3J2
PGND4J3
PGND5J4
PGND6J5
PGND7J6
VD
D5
VF
1
VD
D1
8F
6
RSV3G3
RSV2H3
RSV1G4
TS/EOCH4
C2
01uF
/EN
R1
910K
I2C
RA
IL
VO
UT
VO
SE
T
P9221-R MM EV Board V2.2
C3
1
0.1
uF
C8
15nF
VR
EC
T
R3
50
J1
I2C
1 2 3 4 5
L1
SC
L
R2
8N
P
R1
710k
VP
P18
R4
2
NP
VD
D5
V
R2
2
NP
R2
36
R1
45
.1k
C3
10
0n
F/5
0V
RP
O
C1
1
10uF
RSV1
R1
35
.1k
TS
VO
UT
C2
3
0.1
uF
GN
D1
R1
610K
VR
EC
T
R2
9
10K
C7
NP
VO
SN
S
ILIM
R3
410k
R2
3
10k
C2
2
10uF
VD
D5
V
R3
810K
RX Power Coil
AlignX coil
C1
8 1uF
C6
47nF
VP
P18
Vre
ct
R1
5.1
k
ALG
Y
TS
C2
10
0n
F/5
0V
D7
5.1
V
U2
NP
A0
1
A1
2
A2
3
VS
S4
SD
A5
SC
L6
WP
7
VC
C8
E_PAD9
VP
P18
RT
S
NP
VP
P18
C1
10
0n
F/5
0V
AlignY coil
WP
C5
10
0n
F/5
0V
R4
1
NP
LC
SD
A
INT
R2
7
10K
VO
UT
C3
3
10uF
DE
N
R3
0N
P
AC
2T
TS
C1
5N
PG
ND
SC
L
R6
NP
R1
510K
GC
OM
AC
2
RP
G
C1
447nF
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 12 December 18, 2017
4. Bill of Materials (BOM)
Table 4. P9221-R-EVK MM Evaluation Board BOM V2.2
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 CAP CER 0.1µF 50V X5R 0402 GRM155R61H104KE19D 0402
4 C6, C14 2 47nF CAP CER 0.047µF 50V X7R 0402 C1005X7R1H473K050BB 0402
5 C7, C15 2 NP CAP CER 0.047µF 50V X7R 0402 C1005X7R1H473K050BB 0402
6 C8, C16 2 15nF CAP CER 0.015µF 50V X7R 0402 GRM155R71H153KA12J 0402
7 C9 1 3.3nF CAP CER 3300PF 50V X7R 0402 CL05B332KB5NNNC 0402
8 C10, C11, C21, C22, C33
5 10µF CAP CER 10µF 25V X5R 0603 CL10A106MA8NRNC 0603
9 C12 1 NP CAP CER 10µF 25V X5R 0603 CL10A106MA8NRNC 0603
10 C18,C20 2 1µF CAP CER 1µF 10V X5R 0402 GRM155R61A105KE15D 0402
11 C19,C31 2 0.1µF CAP CER 0.1µF 10V X5R 0201 C0603X5R1A104K030BC 0201
12 C23 1 0.1µF CAP CER 0.1µF 25V X5R 0201 CL03A104KA3NNNC 0201
13 C25 1 NP CAP CER 0.1µF 10V X5R 0201 C0603X5R1A104K030BC 0201
14 D1 1 LED LED GREEN CLEAR 0603 SMD 150 060 GS7 500 0 0603_diode
15 D6,D7 2 5.1V DIODE ZENER 5.1V 100MW 0201 CZRZ5V1B-HF 0201
16 GND1, VRECT, VOUT, VOSNS, GND
5 Test Point
TEST POINT PC MINIATURE SMT 5015 test_pt_sm_135x70
17 J1 1 I2C HEADER_1X5_0P1PITCH60P42D 68002-205HLF header_1x5_0p1Pitch60p42d
18 L1 1 8.2µH Wireless power receiver coil ASC-504060E00-S00 sm_135x70
19 RTS 1 NP
NTC2
20 R1, R13, R14 3 5.1kΩ RES SMD 5.1K OHM 5% 1/16W 0402
MCR01MRTJ512 0402
21 R2 1 36Ω RES SMD 36 OHM 5% 1/2W 0805 ERJ-P06J360V 0805
22 R6 1 NP RES SMD 0.0OHM JUMPER ERJ-2GE0R00X 0402
23 R8 1 0Ω RES SMD 0.0OHM JUMPER 1/10W 0402
ERJ-2GE0R00X 0402
24 R15, R16 2 10KΩ RES SMD 10K OHM 1% 1/10W 0603
RC0603FR-0710KL 0603
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 13 December 18, 2017
Item Reference Quantity Value Description Part number PCB Footprint
25 R17, R19, R23, R27, R29, R34, R38, R39
8 10kΩ RES SMD 10K OHM 5% 1/16W 0402
CRCW040210K0JNEDIF 0402
26 R18, R22, R28, R30, R33, R41, R42
7 NP RES SMD 10K OHM 5% 1/16W 0402
CRCW040210K0JNEDIF 0402
27 R35 1 0Ω RES SMD 0.0OHM 1/10W 0603 MCR03EZPJ000 0603
28 U1 1 P9221-R MP Wireless power receiver P9221-R csp52_2p64x3p94_0p4mm
29 U2 1 NP IC EEPROM 128KBIT 400KHZ 8TDFN
24AA128T-I/MNY TDFN08
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 14 December 18, 2017
5. Board Layout
Figure 8. Silkscreen – Top of Board
Figure 9. Silkscreen – Bottom of Board
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 15 December 18, 2017
Figure 10. Top Copper Layer
Figure 11. L2 Copper Layer
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 16 December 18, 2017
Figure 12. L3 Copper Layer
Figure 13. Bottom Copper Layer
P9221-R-EVK Evaluation Board User Manual
© 2017 Integrated Device Technology, Inc. 17 December 18, 2017
6. Ordering Information
Orderable Part Number Description
P9221-R-EVK P9221-R-EVK MM Evaluation Board
7. Revision History
Revision Date Description of Change
December 18, 2017 Updates for V2.2 of the P9221-R-EVK.
Minor edits.
December 19, 2016 Initial release of document.
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