The P9221-R3 is a high-efficiency 15W magnetic induction wireless power receiver with in-band, bidirectional data communication with no additional circuitry. The communication channel can be used for proprietary device authentication and secure system data transfer.

The P9221-R3 integrates a 32-bit Arm® Cortex®-M0 processor, low RDS(ON) synchronous rectifier, and ultra-low dropout regulator making it ideal for high-efficiency, space-constrained receiver applications. The device features a programmable output voltage, current limitation, and foreign-object detection (FOD) settings. An I²C serial interface allows reading information such as voltage, current, and fault conditions. The device also features a patented over-voltage protection scheme eliminating the need for additional capacitors, which can minimize the external component count and cost. Combined with the P9242-R3 transmitter, the P9221-R3 forms a complete wireless power system solution for 15W applications with bidirectional communication.

The P9221-R3 is provided in a 52-WLCSP package (2.64mm × 3.94mm, 0.4mm pitch), and it is rated for a 0 °C to +85 °C ambient operating temperature range.


  • Supports bidirectional data communication 
  • Enables authentication and system data transfer
  • Single-chip solution supporting applications with up to 15W
  • Patented over-voltage protection clamp eliminating external capacitors
  • 87% peak DC-to-DC efficiency when combined with the P9242-R3
  • Proprietary coil alignment guide
  • Programmable output voltage and current limit
  • Embedded 32-bit Arm® Cortex®-M0 processor
  • Dedicated remote temperature sensing
  • Standard device compliant with WPC 1.2 specification
  • Supports I²C interface
  • 0 °C to +85 °C ambient operating temperature range
  • 2.64 x 3.94 mm 52-WLCSP package




Type Title Date
Datasheet PDF 1.54 MB
Application Note PDF 810 KB
Overview PDF 1.14 MB
Product Change Notice PDF 752 KB
Application Note Log in to Download PDF 3.74 MB
Datasheet - Short-form PDF 137 KB
White Paper PDF 627 KB
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Design & Development

Boards & Kits

Boards & Kits


IDT 15W Wireless Power Reference Kit w/ Bi-directional Communication

A brief overview of the WP15WBD-RK, a 15W WPC Qi-compatible wireless power reference kit featuring a bi-directional communication channel between the transmitter and receiver. The bi-directional data communication channel enables users to authenticate a wirelessly charged receiver device with a specific charging transmitter base or to transfer system data without any additional hardware.

For more information, visit www.IDT.com/WP15WBD-RK.