IDT P9221-R-EVK User Manual
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 demonstrates the features and performance of the P9221-R 15W
Wireless Power Receiver (Rx). The P9221-R-EVK offers the flexibility to program parameters, such as the output voltage, overcurrent 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 P9242R-EVK MM Evaluation Board as the power transmitter. The P9242R-EVK is ordered separately. The P9221-R-EVK can also be used
with 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: 420mm
2
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
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