Description
The IDT 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 a complete wireless power system solution for
15W applications with bi-directional data communication.
The P9242-R3 has a bootloader and application firmware preprogrammed into the internal one-time programmable (OTP)
memory. The P9242-RB, which is pin-to-pin compatible with the
P9242-R3, has only the bootloader pre-programmed into the
internal OTP memory and uses external flash for the application
firmware so that it can be changed for specific system requirements.
The P9242-R3 is available in a space-saving 48-VFQFPN package.
It is rated for -40°C 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 to 21V
 Integrated drivers for external power FETs
 Integrated step-down switching regulator
 Simultaneous voltage and current demodulation
 Standard device compliant with the WPC-1.2 specification
 Supports the I2C interface protocol
 -40°C to +85°C ambient operating temperature range
 6 × 6 mm, 48-VFQFPN package, Pb-free