WPC 1.2 Compliant, Wireless Charging Transmitter for 15W Applications

The P9242-R is a highly-integrated 15W magnetic induction wireless power transmitter compliant to the WPC-1.2 specification. The product is designed to withstand a wide input voltage range of 4.25V to 21V, while consuming very low power in standby mode.

The transmitter includes a 32-bit ARM Cortex®-M0 processor, foreign object detection (FOD), full bridge drivers and on-chip simultaneous voltage and current demodulation. The device features a programmable current, programmable LED pattern; and I2C serial interface protocol to read back information such as voltage, current and fault conditions. Together with P9221-R receiver, the P9242-R is a complete wireless power system solution for 15W applications. The P9242-R is available in a , space-saving 6 x 6 mm 48-VFQFPN package. It is rated for -40ºC to +85ºC ambient operating temperature range.


  • VIN range: 4.25 to 21 V
  • Compliant to WPC-1.2 specification
  • Up to 15W of power transfer
  • 86% end to end efficiency
  • Low standby and sleep mode power                                      
  • Integrated step-down switching regulator
  • Simultaneous voltage & current demodulation
  • Integrated 32bit ARM® Cortex®-M0 processor
  • Supports I2C interface

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
P9242-RNDGI Active NDG48P2 VFQFPN 48 I Yes Tray Availability
P9242-RNDGI8 Active NDG48P2 VFQFPN 48 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
P9242-R Datasheet Datasheet PDF 1.13 MB Jan 16, 2018
User Guides & Manuals
P9242-R Layout Guidelines Guide PDF 786 KB Dec 21, 2016
Application Notes & White Papers
Tuning Qi and AirFuel / PMA Inductive Resonance Circuits for Optimal Efficiency White Paper PDF 541 KB May 10, 2017
AN-816 IDT Wireless Power Transmission Resonance LC Calculations Application Note PDF 284 KB Jan 16, 2014
PCN# : WP1706-01 Firmware change, P9242-RNDGI(8) Product Change Notice PDF 50 KB Jul 9, 2017
Errata#: WPEN-17-01 Device Errata P9242-RNDGI, P9242-RNDGI8 Device Errata PDF 20 KB Dec 19, 2017
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage 日本語 Overview PDF 3.55 MB May 26, 2017
Wireless Power Reference Kits Overview Overview PDF 2.04 MB Feb 21, 2017
P9221-R and P9242-R Wireless Power Reference Kits for 15W Applications Product Brief PDF 253 KB Dec 14, 2016
P9242-R Wireless Power Transmitter for 15W Applications Product Brief PDF 307 KB Dec 6, 2016

Evaluation Boards

Part Number Title Sort ascending
P9242-R-EVK Wireless Power Transmitter Reference Solution
P9221-R-EVK Wireless Power Receiver Reference Solution