The P9221-R3 is a high efficiency 15W magnetic induction wireless power receiver with in-band, bi-directional 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 complete wireless power system solution for 15W applications with bi-directional communication.

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


  • Supports bi-directional 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 to +85°C ambient operating temperature range
  • 2.64 x 3.94 mm 52-WLCSP package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
P9221-R3AHGI8 Active AHG52 WLCSP 52 I Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
P9221-R3 Short-Form Datasheet Short Form Datasheet PDF 137 KB
P9221-R3 Datasheet Datasheet PDF 1.54 MB
Application Notes & White Papers
Wireless Power Transmission Resonance LC Calculations Application Note PDF 3.74 MB
Tuning Qi and AirFuel / PMA Inductive Resonance Circuits for Optimal Efficiency White Paper PDF 627 KB
IDT WLCSP Implementation Guidelines Application Note PDF 662 KB
Wireless Power Products Overview 日本語, 简体中文 Overview PDF 1.16 MB

Boards & Kits

Part Number Title Type Company
WP15WBD-RK 15W Wireless Charging Solution with Bi-Directional Data Communication