Automotive Multi-Coil 15W Wireless Charging Transmitter

The P9261 is a highly integrated, magnetic induction wireless power transmitter controller supporting the WPC Qi specifications or proprietary applications. The P9261 functions with multiple coils in a full-bridge or half bridge inverter configuration.

The P9261, which includes an industry-leading 32-bit ARM® Cortex®-M0 processor, offers a high level of programmability and extremely low standby power consumption. The 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 transmitter will enable the power receiver to output 15W if the bidirectional communication protocol can be established, or the power receiver will output only 5W for a standard 5W power receiver.

The transmitter detects if a foreign metal object is placed on the transmitter coil. To safeguard the device and the system under fault conditions, the P9261 includes input under-voltage, input overvoltage, output short-circuit, and over-temperature protection.

The microcontroller empowers the user to customize features such as LED patterns, foreign object detection (FOD) threshold settings, or the over-temperature threshold. The device supports the I2C serial interface protocol, which enables the user to control the basic parameters, such as operating mode, switching frequency, input current, and input voltage.

The P9261 is available in a lead-free, space-saving 7 × 7 mm, 48-QFN wettable flank RoHS-compliant package. The product is rated over the operating temperature range of -40ºC to +105ºC.

Features

  • AEC-Q100, grade 2 qualified for automotive applications
  • EMI/EMC performance meets the CISPR-25 specification
  • Supports up to 15W wireless power receivers
  • Wide input voltage range: 4.25V to 21V
  • Fixed frequency and duty cycle wireless power topology
  • WPC 1.2.4 compliant and will support future WPC compatibility; supports multi-coil configurations
  • Embedded 32-bit ARM® Cortex®-M0 processor (trademark of ARM, Ltd.)
  • OTP program memory; also supports external flash memory
  • Supports I2C and SPI interfaces
  • Integrated drivers for external power FETs and current voltage sensing
  • Low standby power
  • Integrated step-down switching regulator for internal blocks to increase overall efficiency
  • Advanced foreign objects detection (FOD) and Q-factor function
  • Supports LEDs for status indication and alignment aid
  • Over-current, over-voltage, and over-temperature protection
  • Dedicated remote temperature sensing

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Carrier Type Buy Sample
P9261-0NLG2 Active NLG48P3 VFQFPN 48 2 Tray Availability
P9261-0NLG28 Active NLG48P3 VFQFPN 48 2 Reel Availability
P9261-3CNLG2 Active NLG48P3 VFQFPN 48 2 Tray Availability
P9261-3CNLG28 Active NLG48P3 VFQFPN 48 2 Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
P9260-61 Datasheet Datasheet PDF 2.29 MB Sep 27, 2018
P9260-61 Short-Form Datasheet Short Form Datasheet PDF 148 KB Feb 23, 2018
Application Notes & White Papers
AN-1016 P9261 CRB Power-Loss and FOD Tuning Guide Application Note PDF 599 KB Sep 26, 2018
AN-990 P9260-61 Layout Guidelines Application Note PDF 3.07 MB Sep 26, 2018
AN-1015 P9261 CRB Q-Factor Tuning and Open FOD Thresholds Programming Guide Application Note PDF 369 KB Sep 26, 2018
Tuning Qi and AirFuel / PMA Inductive Resonance Circuits for Optimal Efficiency White Paper PDF 541 KB May 10, 2017
Other
Wireless Power Overview Overview PDF 534 KB Jul 25, 2018

Software & Tools

Title Other Languages Type Format File Size Date
P9261-3C-CRB Software Tool Software Tool ZIP 981 KB Oct 1, 2018
P926x CRB Power-Loss and FOD Thresholds Calculator Tool Software Tool XLSX 38 KB Sep 27, 2018

Evaluation Boards

Part Number Title Sort ascending
P9261-3C-CRB Automotive 15W Wireless Charging Transmitter Customer Reference Board