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
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : W1905-01 Product Change Notice for TSMC Fab6 Alternate Foundry Product Change Notice PDF 1.15 MB
Other
Wireless Power Overview 日本語, 简体中文 Overview PDF 534 KB

Evaluation Boards

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