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