P9222-R/RN Datasheet

© 2019-2022 Renesas Electronics Corporation

3

May 5, 2022

Contents

1. Pin Information .............................................................................................................................................................................................7

1.1 Pin Assignments ................................................................................................................................................................................7

1.2 Pin Descriptions .................................................................................................................................................................................8

2. Specifications .............................................................................................................................................................................................10

2.1 Absolute Maximum Ratings .............................................................................................................................................................10

2.2 Thermal Characteristics ...................................................................................................................................................................10

2.3 Electrical Characteristics..................................................................................................................................................................11

3. Description of the Wireless Power Charging System .................................................................................................................................15

4. Typical Performance Characteristics..........................................................................................................................................................16

5. Theory of Operation....................................................................................................................................................................................18

5.1 Overview ..........................................................................................................................................................................................18

5.1.1 Low-Power Ping Detection .................................................................................................................................................18

5.1.2 Rx Operation ......................................................................................................................................................................18

5.2 Wireless Power Control....................................................................................................................................................................18

5.3 Startup 18

5.4 Power Transfer.................................................................................................................................................................................19

5.5 Synchronous Rectifier......................................................................................................................................................................19

5.6 Over-Voltage Protection...................................................................................................................................................................19

5.7 Over-Current Protection and Thermal Shutdown.............................................................................................................................19

5.8 External Temperature Sensing ........................................................................................................................................................19

5.9 Rectifier and VRECT Level ..............................................................................................................................................................20

5.10 Interrupt Output................................................................................................................................................................................20

5.11 Low Drop-Out (LDO) Regulators......................................................................................................................................................21

5.12 MLDO Output Enable Conditions.....................................................................................................................................................21

5.13 Output Power Options......................................................................................................................................................................21

6. Bi-directional User Data Communication....................................................................................................................................................22

6.1 Transferring Data from the P9222-R/RN to the P9235-RB ..............................................................................................................22

6.2 Reading Data Sent from the P9235-RB to the P9222-R/RN............................................................................................................25

7. WPC Mode Characteristics ........................................................................................................................................................................27

7.1 WPC-Compliant Power Transfer......................................................................................................................................................27

7.2 Advanced Foreign-Object Detection (FOD) in WPC Mode ..............................................................................................................27

7.3 WPC Modulation/Communication ....................................................................................................................................................27

7.4 Bit Encoding Scheme for ASK .........................................................................................................................................................28

7.5 System Feedback Control................................................................................................................................................................29

7.5.1 Selection.............................................................................................................................................................................29

7.5.2 Ping ....................................................................................................................................................................................30

7.5.3 Identification and Configuration..........................................................................................................................................30

7.5.4 Power Transfer...................................................................................................................................................................30