The P9221-R is a highly-integrated, Qi-compliant wireless power receiver targeted for 15W applications. Using magnetic inductive charging technology, the receiver converts an AC power signal from a resonant tank into a regulated 9V or 12V DC output voltage. The integrated, low-RDS(ON) synchronous rectifier and ultra-low-dropout regulator offer high-efficiency, making the product ideal for battery-operated applications.

The receiver includes a 32-bit ARM Cortex®-M0 processor offering a high level of programmability. The device outputs proprietary alignment guide information for optimum coupling between the receiver and the transmitter, and features a programmable current limit. The innovative over-voltage protection scheme eliminates the need for additional capacitors generally required by other receivers, minimizing the external component count and cost. Together with the P9242-R transmitter, the P9221-R is a complete wireless power system solution for 15W applications. The P9221-R is available in a space-saving 2.64 × 3.94 mm 52-WLCSP package. It is rated for the -40°C to 85°C ambient operating temperature range.


  • Single-chip, 15W, wireless power receiver
  • WPC 1.2.2 compliant
  • Full synchronous rectifier with low resistance switches
  • Embedded 32bit ARM® Cortex®-M0 processor
  • Proprietory overvoltage protection eliminating external capacitors
  • Low standby and operating mode power consumption
  • Programmable current limit
  • Supports I2C interface

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active WLCSP 52 I Yes Reel


Title language Type Format File Size Date
Datasheets & Errata
P9221-R Datasheet Datasheet PDF 1.21 MB
User Guides & Manuals
P9221-R Layout Guidelines Guide PDF 1.05 MB
Application Notes & White Papers
Wireless Power Transmission Resonance LC Calculations Application Note PDF 3.74 MB
IDT WLCSP Implementation Guidelines Application Note PDF 662 KB
Tuning Qi and AirFuel / PMA Inductive Resonance Circuits for Optimal Efficiency White Paper PDF 627 KB
PCN# : WP2002-01 TSMC Fab 6 Qualified as Alternate Fab Location Product Change Notice PDF 752 KB
PCN# : TB1711-03 Change of Cover Tape on Select Package Product Change Notice PDF 1.57 MB
PCN# : WP1705-01(R1) Revised PCN notice on Firmware update Product Change Notice PDF 48 KB
PCN# : WP1705-01 Firmware Update on P9221-R Product Change Notice PDF 50 KB
PCN# : W1903-01(R1) Add Alternate Foundry for P9221-R7AHGI Product Change Notification PDF 863 KB
PCN# : W1903-01 Add TSMC Fab 6 as Alternate Foundry Product Change Notification PDF 223 KB
Wireless Power Products Overview Overview PDF 1.14 MB
P9221-R and P9242-R Wireless Power Reference Kits for 15W Applications Product Brief PDF 253 KB
P9221-R Wireless Power Receiver for 15W Applications Product Brief PDF 291 KB

Boards & Kits

Part Number Title Type Company
P9221-R-EVK Wireless Power Receiver Reference Solution Reference Renesas
P9242-R-EVK Wireless Power Transmitter Reference Solution Reference Renesas