P9242-R Datasheet

© 2018 Integrated Device Technology, Inc

2

January 16, 2018

Contents

1.

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

2.

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

3.

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

4.

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

5.

Typical Performance Characteristics..........................................................................................................................................................11

6.

Function Block Diagram .............................................................................................................................................................................13

7.

Theory of Operation....................................................................................................................................................................................14

7.1 Foreign Object Detection...................................................................................................................................................................14

7.2 Configuring Foreign Object Detection and Over-Current Limit – ILIM/FOD Pin ................................................................................14

7.3 Enable Pin – EN ................................................................................................................................................................................16

7.4 Buzzer – BUZR Pin ...........................................................................................................................................................................16

7.5 Voltage Demodulation – VDEM1 Pin.................................................................................................................................................16

7.6 Current Demodulation – IDEMI .........................................................................................................................................................16

7.7 Thermal Protection ............................................................................................................................................................................17

7.8 External Temperature Sensing – TS .................................................................................................................................................17

7.9 Q-Factor and LED Pattern Selection – LED/Q-Fact Pin....................................................................................................................18

7.10 Input Voltage Requirement................................................................................................................................................................19

7.11 Integrated Step-Down Regulator .......................................................................................................................................................19

7.12 Integrated Linear Regulators – PREG, LDO33, and LDO18 .............................................................................................................19

7.13 Under-Voltage Lock-Out (UVLO) Protection......................................................................................................................................19

7.14 LC Resonant Circuit ..........................................................................................................................................................................20

8.

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

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

8.2 Bit Decoding Scheme for ASK...........................................................................................................................................................22

8.3 Byte Decoding for ASK......................................................................................................................................................................22

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

9.

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

9.1 Selection Phase.................................................................................................................................................................................23

9.2 Ping Phase (Digital Ping)...................................................................................................................................................................23

9.3 Identification and Configuration Phase..............................................................................................................................................24

9.4 Negotiation Phase .............................................................................................................................................................................24

9.5 Calibration Phase ..............................................................................................................................................................................24

9.6 Power Transfer Phase.......................................................................................................................................................................24

10. Functional Registers...................................................................................................................................................................................25

10.1 I2C Interface......................................................................................................................................................................................25

10.2 Register Addresses and Definitions ..................................................................................................................................................26

11. Application Information ...............................................................................................................................................................................29

11.1 Power Dissipation and Thermal Requirements .................................................................................................................................29