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P9235A

Obsolete

WPC 1.1 Wireless Power Transmitter IC for Tx-A5 and Tx-A11

Overview

The P9235A is a 5W, 21V guided positioning magnetic induction wireless power transmitter product supporting WPC’s A5/A11 coil configurations. The system-on-chip integrates a power controller, microcontroller, foreign object detection (FOD), full bridge power stage drivers, and on-chip simultaneous voltage and current demodulation. The product is designed to withstand a wide input voltage range of 4.25V to 21V while consuming 1mA of current in the standby mode.

The transmitter includes an industry-leading 32-bit Arm® Cortex®-M0 processor offering a high level of programmability while consuming ultra-low standby power meeting the Energy Star requirement. In addition, the microcontroller empowers users to customize features such as LED patterns, buzzer, and FOD threshold settings. The device supports an I2C serial interface. The P9235 is available in a Pb-free, space-saving QFN 5mm x 5mm, 40-pin package. The product is rated over an operating temperature range of -40 °C to +85 °C.

NOTICE: This device is restricted to high-volume and strategic applications only.

P9235A - Application Circuit
P9235A - Pinout
P9235A - Application Circuit
P9235A - Pinout
  • VIN range: 4.25V to 21V
  • WPC 1.1 compliant for A5/A11 type coils
  • 80% peak efficiency
  • Proprietary slew rate control eliminating EMI filter
  • Simultaneous voltage and current demodulation
  • Integrated 32-bit Arm Cortex-M0 processor
  • Supports I2C interface
  • Optional proprietary back-channel communication
  • -40 °C to +85 °C temperature range
  • Available in a 5mm x 5mm 40-lead VFQFPN package

Documentation

Design & Development

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Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

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  1. P9235A-RB EVK Wireless Power Transmitter "Power Limit" status

    I am using the P9235A-RB-EVK and the P9222-R-EVK to evaluate a non-standard coil configuration that results in an overall efficiency of 62% after tuning. I have it working pretty well, but when the load increases to where the input power is 4.0W to 4 ...

    Oct 1, 2021
  2. P9235A-RB firmware

    Hello, I'm trying to P9235A-RB board but face some problems now. 1. Firstly, we're trying to upload firmware using a dongle and given GUI program. The GUI program can detect the existence of the dongle(UMFT4222EV). However, it cannot detect the TX. We thoroughly check the connection ...

    Oct 28, 2022