Wireless EV charging station

Products and reference designs

Wireless EV charging station

Block diagram

Overview

Our integrated circuits and reference designs help you create smarter and safer wireless electric vehicle (EV) charging stations. Whether a WPT1, WPT2 or WPT3 charging subsystem, we can help enable your design to efficiently transmit and receive power from a single, three-phase AC outlet.

Design requirements

Modern wireless EV charging stations often require:

  • High-efficiency PFC stage followed by isolated or non-isolated inverter power stage.
  • Foreign object detection of any object, especially metallic material.
  • Live object protection with false trigger avoidance to create a virtual safety circle.
  • Accurate, precise superposition of transmit and receive power coil.

Block diagram

Find products and reference designs for your system.

Single phase wireless EV charging station

Impedance matching Impedance matching AC/DC power digital processing AC/DC power digital processing MCU MCU Power board wired interface Power board wired interface CAN CAN Ethernet Ethernet RS-485 RS-485 Power board signal isolation Power board signal isolation Data isolation Data isolation Power fan stage Power fan stage Fan motor driver Fan motor driver Power board input power protection Power board input power protection eFuse eFuse To: central control module To: central control module HMI digital processing HMI digital processing MCU/MPU MCU/MPU Isolated AC/DC Isolated AC/DC Isolated AC/DC Isolated AC/DC Isolated DC/DC Isolated DC/DC Isolated DC/DC IsolatedDC/DC ISO IO rail ISO IO rail DC rail DC rail 120-240VAC Single phase grid connection 120-240VAC Single phase grid connection Power board signal input/output protection Power board signal input/output protection ESD ESD HMI signal input/output protection HMI signal input/output protection ESD ESD HMI signal isolation HMI signal isolation Data isolation Data isolation HMI wired interface HMI wired interface USB USB Ethernet Ethernet CAN CAN RS-232 RS-232 RS-485 RS-485 HMI clocking HMI clocking RTC RTC HMI memory HMI memory Memory Memory HMI wireless interface HMI wireless interface 3G/4G LTE 3G/4G LTE NFC NFC Wi-Fi Wi-Fi Bluetooth Bluetooth DC rail DC rail HMI power stage HMI power stage Fan motion driver Fan motion driver AC/DC power stage AC/DC power stage Gate driver Gate driver Power FET Power FET High frequency inverter stage Highfrequency inverter stage Power FET/ IGBT PowerFET/ IGBT Gate driver Gate driver AC/DC logic AC/DC logic Gates & buffers Gates & buffers Inverter logic Inverter logic Gates & buffers Gates & buffers AC/DC output voltage sense AC/DC output voltage sense ISO AMP ISO AMP AC/DC analog front-end AC/DCanalog front-end Reference Reference ADC ADC Power board non-isolated DC/DC power supply Power board non-isolated DC/DC power supply Quad SVS/sequencer Quad SVS/sequencer DC/DC VTT DC/DC VTT Low noise power Low noise power DC/DC DC/DC HMI self-diagnostics/monitoring HMI self-diagnostics/monitoring Temperature sensor Temperature sensor FOD analog front-end FODanalog front-end Reference Reference ADC ADC LOP analog front-end LOPanalog front-end Reference Reference ADC ADC LOP signal input/output protection LOP signal input/output protection ESD ESD LOP wired interface LOP wired interface RS-485 RS-485 CAN CAN Ethernet Ethernet HMI non-isolated DC/DC power supply HMI non-isolated DC/DC power supply Quad SVS/sequencer Quad SVS/sequencer DC/DC VTT DC/DC VTT Low noise power Low noise power DC/DC DC/DC DC rail DC rail Relay control power stage Relay control power stage Relay driver Relay driver Relay Relay Primary transmission coil Primary transmission coil Inverter power digital processing Inverter power digital processing MCU MCU Inverter clocking Inverter clocking RTC RTC HMI output user interface HMI outputuser interface LED driver LED driver AC/DC leakage current detection AC/DC leakage current detection Current transformer Current transformer AMP AMP or or GFCI AFE GFCI AFE MCU MCU Reference Reference ADC ADC Reference Reference ADC ADC AC/DC input current & voltage sense AC/DC input current & voltage sense Comp Comp AMP AMP Current sensor Current sensor ISO AMP ISO AMP Inverter output current sense Inverter output current sense Comp Comp AMP AMP Current sensor Current sensor Power board self diagnostics/monitoring Power board self diagnostics/monitoring Temperature sensor Temperaturesensor Alignment analog front-end Alignmentanalog front-end Reference Reference ADC ADC Primary com-pensation Primary com-pensation AC/DC clocking AC/DC clocking RTC RTC Inverter analog front-end Inverter analog front-end Reference Reference ADC ADC Foreign object detection (FOD) sensing Foreign object detection (FOD) sensing FOD coils FOD coils Buffer Buffer DAC DAC Amps Amps Analog switch Analog switch Magnetic vectoring alignment sensing Magnetic vectoring alignment sensing Amps Amps Magnetic vectoring coils (XYZ) Magnetic vectoring coils (XYZ) INA INA Live object protection (LOP) Live object protection (LOP) Antenna Antenna mmWave sensor mmWavesensor Microwave transceiver Microwavetransceiver Amps Amps Transducer (RX) Transducer (RX) Transducer (TX) Transducer (TX) Op amps Op amps Hex buffer inverter Hex buffer inverter Ultrasonic Ultrasonic mmWave mmWave or or Ultrasonic processor and driver Ultrasonic processor and driver HMI input power protection HMI input power protection eFuse eFuse

Technical documentation

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Type Title Date
White paper Impact of an isolated gate driver (Rev. A) 28 Feb 2019
White paper Maximizing power for Level 3 EV charging stations 22 Jun 2018
White paper Smart power opens door to more efficient electrical use 21 Mar 2016
White paper Taking charge of electric vehicles – both in the vehicle and on the grid (Rev. A) 17 Jun 2020
Application note Using a Single-Output Gate-Driver for High-Side or Low-Side Drive (Rev. B) PDF | HTML 08 Sep 2023

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