P9221-R Datasheet

© 2017 Integrated Device Technology, Inc.

2

October 10, 2017

Contents

1.

Pin Assignments...........................................................................................................................................................................................5

2.

Pin Descriptions............................................................................................................................................................................................6

3.

Absolute Maximum Ratings..........................................................................................................................................................................8

4.

Thermal Characteristics................................................................................................................................................................................9

5.

Electrical Characteristics ..............................................................................................................................................................................9

6.

Typical Performance Characteristics..........................................................................................................................................................12

7.

Functional Block Diagram...........................................................................................................................................................................15

8.

Theory of Operation....................................................................................................................................................................................16

8.1

LDO – Low Dropout Regulators.......................................................................................................................................................16

8.2

Setting the Output Voltage and Reference Q-factor Value – VOSET/Q-Fact Pin............................................................................16

8.3

SINK Pin ..........................................................................................................................................................................................17

8.4

Rectifier Voltage – VRECT...............................................................................................................................................................17

8.5

Over-Current Limit – ILIM.................................................................................................................................................................17

8.6

Interrupt Function – INT ...................................................................................................................................................................18

8.7

Enable Pin – EN...............................................................................................................................................................................18

8.8

Thermal Protection...........................................................................................................................................................................18

8.9

External Temperature Sensing and End of Charge – TS/EOC........................................................................................................18

8.10 Alignment Guide – ALIGNX and ALIGNY ........................................................................................................................................18

8.11 Advanced Foreign Object Detection (FOD) .....................................................................................................................................19

8.12 Received Power Packet Offset and Gain Calibration – RPPO and RPPG ......................................................................................20

9.

Communication Interface............................................................................................................................................................................21

9.1

Modulation/Communication..............................................................................................................................................................21

9.2

Bit Encoding Scheme for ASK .........................................................................................................................................................22

9.3

Byte Encoding for ASK.....................................................................................................................................................................22

9.4

Packet Structure ..............................................................................................................................................................................22

10. WPC Mode Characteristics ........................................................................................................................................................................23

10.1 Selection Phase or Startup ..............................................................................................................................................................23

10.2 Ping Phase (Digital Ping) .................................................................................................................................................................23

10.3 Identification and Configuration Phase ............................................................................................................................................24

10.4 Negotiation Phase............................................................................................................................................................................24

10.5 Calibration Phase.............................................................................................................................................................................24

10.6 Power Transfer Phase .....................................................................................................................................................................24

11. Functional Registers...................................................................................................................................................................................25

12. Application Information ...............................................................................................................................................................................29

12.1 Power Dissipation and Thermal Requirements................................................................................................................................29

12.2 Recommended Coils........................................................................................................................................................................30

12.3 Typical Application Schematic .........................................................................................................................................................31

12.4 Bill of Materials (BOM) .....................................................................................................................................................................32