Description

The P9243-GB is a highly integrated, magnetic induction, wireless

power transmitter that supports up to 15W in compliance with

the WPC-1.2.4 specification or proprietary applications. It is compatible with all popular wireless charging protocols including the

WPC Baseline Power Profile (BPP), Extended Power Profile

(EPP), up to 7.5W charging for iPhones, and Samsung Fast

Charge. This system-on-chip solution (SoC) operates with an input

voltage range of 5V to 19V.

The P9243-GB transmitter IC includes an industry-leading 32-bit

ARM® Cortex®-M0 processor, offering a high level of programmability and extremely low standby power consumption. The

P9243-GB has only pre-programmed bootloader firmware in the

internal memory, and must be used in conjunction with an external

flash memory that contains application firmware. This architecture

gives the user the flexibility to change the firmware in the external

flash to meet application-specific requirements.

The P9243-GB transmitter generates power through the power coil,

detects the presence of a wireless power receiver, decodes the

communication packets from the receiver, and adjusts the

transmitted power by controlling the voltage based on feedback

from the receiver. The device is specially designed to support fixedfrequency operation as described in the WPC MP-A11 coil

configuration with an external input step-down buck regulator. It

uses an external oscillator for very accurate 127.7kHz fixed

frequency operation.

The transmitter detects if a foreign metal object is placed on the

transmitter pad via advanced Q detection. The microcontroller

empowers the user to customize foreign object detection (FOD)

threshold settings. The I2C serial communication allows the user

to read the transmitter’s basic information, such as voltage, current,

frequency, and fault conditions.

The P9243-GB is available in a lead-free, space-saving

48-VFQFPN package. The product is rated for a -40ºC to +85ºC

operating temperature range.

Features

 Power transfer up to 15W at receiver side

 Wide input voltage range: 5V to 19V

 WPC-1.2.4 compatible, MP-A11 coil configuration

 Supports system parameters configuration using a GUI

 Integrated drivers for external power MOSFETs

 Embedded 32-bit ARM® Cortex®-M0 processor (trademark of

ARM, Ltd.)

 Simultaneous voltage and current demodulation scheme for

WPC communication

 Integrated current sense amplifier

 Supports accurate 127.7kHz frequency operation

 Feedback control for external input step-down regulator

 Dedicated remote temperature sensing

 User-programmable power transfer LED indicators

 User-programmable foreign objects detection (FOD)

 WPC EPP-based Q-factor detection

 Active-LOW enable pin for electrical on/off

 Over-current and over-temperature protection

 Supports I2C interface

 -40°C to +85°C ambient operating temperature range

 48-VFQFPN (6 × 6 mm) RoHS-compliant package