Description
The P9235A-RB is a highly integrated, magnetic induction, wireless
power transmitter supporting up to 5W of total wireless system
power with in-band, bi-directional data communication requiring no
additional circuitry. The P9235A-RB offers a pre-programmed
bootloader that must be used in conjunction with an external flash
memory that contains control firmware. This architecture allows the
user to change the firmware in the external flash to meet
application-specific requirements. Renesas also provides firmware
to implement standard WPC coil configurations, such as the A11a
addendum.
The P9235A-RB 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 open-drain LED outputs with pre-defined blinking
patterns and five general-purpose input/output (GPIO) pins. The
GPIOs can be firmware-defined for functions such as setting the
current limit, setting FOD limits, driving additional coils, or sounding
a buzzer, which supports a wide range of applications. The I2C
serial communication allows the user to read information such as
voltage, current, frequency, and fault conditions.
The P9235A-RB includes an under-voltage lockout and thermal
management circuit to safeguard the device under fault conditions.
Together with the P9225-R receiver (RX), the P9235A-RB forms a
complete 5W wireless power system solution with bi-directional
data communication.
The P9235A-RB is available in a Pb-free, space-saving 5 × 5 mm
40-VFQFPN package. The product is rated over an operating
temperature range of -40ºC to +85ºC.

Features
 Power transfer up to 5W
 Wide input voltage range: 4.25V to 21V
 WPC compatible
 Integrated step-down switching regulator
 Embedded 32-bit ARM® Cortex®-M0 processor (trademark of
ARM, Ltd.)
 Integrated drivers for external power FETs
 Supports bi-directional data communication
 Simultaneous voltage and current demodulation scheme for
robust communication
 Integrated current sense amplifier
 Low standby power
 Dedicated remote temperature sensing
 Two LED outputs that can indicate power transfer and fault
conditions
 Foreign object detection (FOD)
 Active-low enable pin for electrical on/off
 Over-current and over-temperature protection
 Supports I2C interface
 SPI interface to access external flash memory
 -40 to +85°C ambient operating temperature range
 40-VFQFPN, 5 × 5 mm RoHS-compliant package