The P9242-R3 is a highly-integrated 15W magnetic induction wireless power transmitter with in-band, bi-directional data communication requiring no additional circuitry. The communication channel can be used for proprietary device authentication and secure system data transfer.

The P9242-R3 includes a 32-bit ARM®  Cortex®-M0 processor, foreign object detection (FOD), wide input voltage range operation, full bridge drivers, and on-chip simultaneous voltage and current demodulation.

In addition, the P9242-R3 features programmable over-current protection, programmable LED output blinking pattern, and I²C serial interface protocol to read back information such as voltage, current, and fault conditions. This standard device is compliant to the WPC-1.2 specification. Combined with the P9221-R3 receiver, the P9242-R3 forms complete wireless power system solution for 15W applications with bi-directional data communication.

The P9242-R3 has the bootloader and application firmware pre-programmed into internal one-time programmable (OTP) memory.
The P9242-RB, which is pin compatible with the P9242-R3, has only the bootloader pre-programmed into OTP memory 
and uses external flash for the application firmware so that it can be changed for specific system requirements.

The P9242-R3 and P9242-RB are available in a lead-free, space-saving 48-VFQFN package. It is rated for -40ºC to +85ºC ambient operating temperature range.

Features

  • Supports bi-directional data communication 
  • Enables authentication and system data transfer
  • Up to 15W of power transfer
  • 87% end-to-end efficiency when combined with the P9221-R3
  • VIN range: 4.25V–21V
  • Integrated drivers for external power FET's
  • Integrated step-down switching regulator
  • Simultaneous voltage and current demodulation
  • Standard device compliant with WPC-1.2 specification
  • Supports I²C interface
  • -40°C to +85°C ambient operating temperature range
  • P9242-RB with an external flash supports firmware customization
  • 6 x 6 mm, 48-VFQFPN package

Product Options

Orderable Part ID Description Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Carrier Type Buy Sample
P9242-R3NDGI Bootloader and application firmware Active NDG48P2 VFQFPN 48 I Tray
Availability
P9242-R3NDGI8 Bootloader and application firmware Active NDG48P2 VFQFPN 48 I Reel
Availability
P9242-RBNDGI Bootloader only Active NDG48P2 VFQFPN 48 I Tray
Availability
P9242-RBNDGI8 Bootloader only Active NDG48P2 VFQFPN 48 I Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
P9242-R3/RB Datasheet Datasheet PDF 821 KB
P9242-R3 Short-Form Datasheet Short Form Datasheet PDF 30 KB
Application Notes & White Papers
Wireless Power Transmission Resonance LC Calculations Application Note PDF 3.63 MB
Tuning Qi and AirFuel / PMA Inductive Resonance Circuits for Optimal Efficiency White Paper PDF 541 KB
Other
Wireless Power Overview Overview PDF 534 KB

Evaluation Boards

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