Datasheet P9222-R (IDT) - 3

P9222-R Datasheet Contents
1. Pin Assignments .7 2. Pin Descriptions.8 3. Absolute Maximum Ratings .10 4. Thermal Characteristics.11 5. Electrical Characteristics .12 6. Description of the Wireless Power Charging System .16 7. Typical Performance Characteristics .17 8. Theory of Operation.19
8.1 Overview .19
8.1.1 Low-Power Ping Detection .19 8.1.2 Rx Operation .19 8.2 Wireless Power Control.19 8.3 Startup 19 8.4 Power Transfer.20 8.5 Synchronous Rectifier .20 8.6 Over-Voltage Protection .20 8.7 Over-Current Protection and Thermal Shutdown .20 8.8 External Temperature Sensing .20 8.9 Rectifier and VRECT Level .21 8.10 Interrupt Output .21
8.11 Low Drop-Out (LDO) Regulators .22
8.12 MLDO Output Enable Conditions .22
8.13 Output Power Options .22
9. WPC Mode Characteristics .23
9.1 WPC-Compliant Power Transfer .23 9.2 Advanced Foreign-Object Detection (FOD) in WPC Mode .23 9.3 WPC Modulation/Communication .23 9.4 Bit Encoding Scheme for ASK .24 9.5 System Feedback Control .25
9.5.1 Selection .25 9.5.2 Ping .26 9.5.3 Identification and Configuration .26 9.5.4 Power Transfer .26 10. Applications Information .27
10.1 Receiver Coil .27
10.2 Series and Parallel Resonant Capacitor Selection.27
10.3 VRECT Pin .28
10.4 Enable Pin .28 © 2019 Integrated Device Technology, Inc. 3 September 27, 2019