The P9412 is a 30W highly integrated single-chip
wireless power Wattshare™ transmitter/receiver IC
(TRx) with a high-performance capacitive divider.
The device can be configured to receive or transmit
AC power through magnetic induction. When the
device is configured as a wireless power transmitter
(Tx), it uses on-chip full/half-bridge inverter, PWM
generator, modulator/demodulator (for
communication) and micro controller to produce an
AC power signal to drive external L-C tank. As a
wireless power receiver (Rx), the device receives
AC power from a wireless transmitter and converts it
to a rectified output voltage, which can be used to
power downstream devices or supply the charger
input in mobile applications.
The P9412 integrates a high-efficiency synchronous
full bridge rectifier and control circuitry to modulate
the load and send message packets to the
Transmitter for optimized power delivery. The
device features Multiple-Time Programmable (MTP)
non-volatile memory which allows easy firmware
updates.
The P9412 includes over-current, over-voltage, and
over-temperature protections. Fault conditions are
managed by an industry-leading 32-bit ARM®
Cortex®-M0 processor offering high programmability
with low standby power ideal for mobile
applications. The processor can also control GPIOs
to indicate operating and fault modes. The device is
available in a WLCSP-81 package.

Applications
• Smart phone
• Other mobile applications

Features
• Single-chip Magnetic Induction Wireless Power
Transmitter/Receiver
• WPC 1.3 compatible
• Supports proprietary modes
• Delivers up to 30W as a receiver
• Delivers over 6W as a transmitter
• Integrated high-performance synchronous
rectifier, LDO, and capacitor divider
• Reliable over-voltage clamping
• Best-in-class EMI performance (in Bypass mode)
• Proprietary Rx-to-Tx modulation/demodulation for
two-way communication
• Tx-to-Rx (Backchannel) communication
• 24kB MTP non-volatile memory for expanded
feature support
• Embedded 32-bit ARM® Cortex®-M0 processor
• Supports I2C 400kHz standard interface and
GPIOs
• 0.4mm pitch WLCSP-81 4.02 × 4.01 mm package