Fixed Frequency, Wireless Charging Transmitter for 15W Applications

The P9242-G is a highly integrated, magnetic induction, wireless power transmitter supporting applications up to 15W. The system-on-chip device (P9242-G) operates with an input voltage range of 4.25V to 21V. 

The P9242-G includes an industry-leading 32-bit ARM® Cortex®-M0 processor offering a high level of programmability while consuming extremely low standby power. The transmitter features two LED outputs with pre-defined user-programmable blinking patterns, buzzer, and programmable over-current protection supporting a wide range of applications. The device is designed to support a fixed frequency operation compliant to WPC MP-A5 and MP-A11 coil configurations. It uses an external oscillator for very accurate 127.7kHz fixed frequency operation. The I²C  serial communication allows the user to read information such as voltage, current, frequency, and fault conditions. 

The P9242-G includes an under-voltage lockout and thermal management circuit to safeguard the device under fault conditions. Together with the P9221-R receiver (RX), the P9242-G forms a complete wireless power system solution.

The P9242-G is available in a lead-free, space-saving 48-VFQFPN package. The product is rated for a -40ºC to +85ºC operating temperature range.


  • Power transfer up to 15W
  • VIN range: 4.25V – 21V
  • WPC-1.2 compliant, MP-A5 and MP-A11 specification
  • Integrated 32-bit ARM® Cortex®-M0 processor
  • Integrated drivers for external power FET's
  • 80% end-to-end efficiency
  • Fixed accurate 127.7kHz frequency
  • Includes industry proprietary fast charge modes
  • Low standby and sleep mode power
  • Integrated step-down switching regulator
  • Simultaneous voltage and current demodulation
  • Pre-defined user-programmable LED pattern
  • Active-LOW enable pin for electrical on/off
  • Supports I²C interface
  • -40 to +85°C ambient operating temperature range
  • 6 x 6 mm, 48-VFQFPN package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
P9242-GNDGI Preview NDG48P2 VFQFPN 48 I Yes Tray Availability
P9242-GNDGI8 Preview NDG48P2 VFQFPN 48 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
P9242-G Short-Form Datasheet Short Form Datasheet PDF 135 KB Dec 14, 2017
Application Notes & White Papers
Wireless Power Transmission Resonance LC Calculations Application Note PDF 3.63 MB Jun 12, 2018
Wireless Power Overview Overview PDF 534 KB Jul 25, 2018

Evaluation Boards

Part Number Title Sort ascending
P9242-G-EVK Fixed Frequency, Wireless Power Transmitter Reference Solution