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IDT P9221-R-EVK User Manual

Turnkey 15 watt, qi-compliant wireless power receiver reference kit
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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 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
Wireless Power Transfer System using the P9221-R-EVK and P9242-R-EVK
© 2017 Integrated Device Technology, Inc.
P9221-R-EVK Evaluation Board User Manual
P9242-R-EVK MM Evaluation Board (Transmitter)
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
Fully assembled with test points and coil fixture
P9221-R-EVK MM Evaluation Board
1
2
Transmitter Coil
P9221-R-EVK MM
Evaluation Board
(Receiver)
December 18, 2017

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Summary of Contents for IDT P9221-R-EVK

  • Page 1 Power transfer LED indicator  Q-Fact pin. Alignment guide information using the PCB coils  The P9221-R-EVK MM Evaluation Board is designed to function as 4-layer PCB  the receiver in a wireless power transfer system using IDT’s P9242- Total active area: 420mm ...

  • Page 2: Table Of Contents

    P9221-R-EVK Evaluation Board User Manual 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 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.
  • Page 3 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.

  • Page 4: Setup

    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.

  • Page 5: Usage Guide

    P9221-R-EVK Evaluation Board User Manual 2. Usage Guide 2.1 Overview of the P9221-R-EVK Figure 2. P9221-R-EVK MM Evaluation Board V2.2 Features Receiver Coil External Temperature Sensing Resistor Y- Alignment Guide Voltage (ALGY) X- Alignment Guide Voltage (ALGX) IDT P9221-R IC...

  • Page 6: Setting The Output Voltage And Reference Q-Factor Value - Voset/Q-Fact Pin

    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.

  • Page 7: Alignment Aid - Alignx And Aligny

    (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.

  • Page 8: Adjustment Of Over-Current Limit

    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. Maximum Output Voltage on ILIM Pin [V] R38 [kΩ] R22 [kΩ]...

  • Page 9: External Temperature Sensing And End Of Charge - Ts/Eoc

    R19 + NTC 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.

  • Page 10: Receiver Coil

    P9221-R-EVK Evaluation Board User Manual Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor 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.

  • Page 11: P9221-R-Evk Mm Evaluation Board Schematics

    P9221-R-EVK Evaluation Board User Manual 3. P9221-R-EVK MM Evaluation Board Schematics © 2017 Integrated Device Technology, Inc. December 18, 2017...

  • Page 12: Bill Of Materials (Bom)

    P9221-R-EVK Evaluation Board User Manual 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 AC2T, VDD5V, PTH_TP Test Pad 10MIL_35PAD VPP18, VOSET, TS, SDA, SCL, RPO, RPG, INT, ILIM,...
  • Page 13 P9221-R-EVK Evaluation Board User Manual Item Reference Quantity Value Description Part number PCB Footprint R17, R19, R23, R27, 10kΩ RES SMD 10K OHM 5% 1/16W CRCW040210K0JNEDIF 0402 R29, R34, R38, R39 0402 R18, R22, R28, R30, RES SMD 10K OHM 5% 1/16W...

  • Page 14: Board Layout

    P9221-R-EVK Evaluation Board User Manual 5. Board Layout Figure 8. Silkscreen – Top of Board Figure 9. Silkscreen – Bottom of Board © 2017 Integrated Device Technology, Inc. December 18, 2017...

  • Page 15: Figure 10. Top Copper Layer

    P9221-R-EVK Evaluation Board User Manual Figure 10. Top Copper Layer Figure 11. L2 Copper Layer © 2017 Integrated Device Technology, Inc. December 18, 2017...

  • Page 16: Figure 12. L3 Copper Layer

    P9221-R-EVK Evaluation Board User Manual Figure 12. L3 Copper Layer Figure 13. Bottom Copper Layer © 2017 Integrated Device Technology, Inc. December 18, 2017...

  • Page 17: Ordering Information

    The information contained herein is provided without representation or warranty of a ny kind, whether express or implied, including, 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 any license under intellectual property rights of IDT or any third parties.

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