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Ki Wireless Power Receiver System (Rx)

Overview

Description

This cutting-edge Ki wireless power receiver system (Rx) is designed for wireless power transfer and communication. Ki delivers up to 2kW of power with high-efficiency transfer, low-loss switching, minimal standby current, and dynamically adjusting power (0–2kW) for maximum energy efficiency. By eliminating appliance cables, Ki optimizes kitchen and home spaces, redefining convenience, safety, and performance for modern appliances.

Powered by Renesas' industry-leading NFC and MCU technology, this system offers optional features such as a capacitive touch display graphical user interface (GUI) and Bluetooth communication for monitoring and remote control. It enhances connectivity and user-friendly control by seamlessly integrating with appliances like extractor hoods. Designed for complete compatibility, the Ki wireless power receiver system (Rx) interfaces directly with the Ki wireless power transceiver system (Tx) for a fully integrated wireless power design.

System Benefits:

  • Cordless operation eliminates appliance cables, maximizing countertop and workspace functionality, and supports a wide range of devices, from blenders and toasters to inductive cooking equipment like pots and pans.
  • Dynamic power and appliance-side control provide seamless adjustment from 0kW to 2kW directly from the appliance side (Rx), enabling efficient and precise power management for enhanced user-friendly control and smarter operation of connected appliances.
  • Industry-leading sinusoidal NFC technology reduces EMI, improves power efficiency, and enhances system reliability and longevity. Direct antenna connections lower signal loss, while smaller antennas enable compact designs and lower material costs.
  • Low-loss switching and minimal standby current optimize performance and reduce power consumption.
  • Optional Bluetooth® Low Energy (LE) communication supports smartphone control and remote interfaces.

Comparison

Applications

  • Household appliances/hubs
  • E-bike/e-scooter
  • Display and battery-less HMI
  • Power tools
  • Robot cleaners
  • Robot mowers

Winning Combinations Interactive Diagram

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WEB_WS043 Ground Sheet.191 Sheet.192 Connector dotted line Connector Line.228 Connector Line.180 Connector Line.181 Connector Line.89 Connector Line Connector Arrow.51 Bridge Rectifier.1003 Sheet.12 Sheet.13 Sheet.14 Sheet.15 Sheet.16 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Sheet.21 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Sheet.27 Isolated AC/DC Flyback Isolated AC/DC Flyback Isolated AC/DC Flyback Buck Regulator Buck Regulator Buck Regulator Relay Switch Component block.35 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Inductor Sheet.37 Sheet.38 Sheet.39 Connector Arrow Circle Connected signals arrow Circle.45 Circle.46 Connector Arrow.47 400V 400V 400V Connector Arrow.49 12V 12V 12V To previous mains powered appliance To previous mains powered appliance To previous mains powered appliance Connector Arrow.53 12V 12V 12V Load Switch Load Switch Load Switch Connector Arrow.56 Transformer Inductor Coreless (Air conductor).59 Sheet.60 Sheet.61 Sheet.62 Sheet.63 Sheet.64 Sheet.65 Sheet.66 Sheet.67 Sheet.68 Ki Communication Ki Communication KiCommunication NFC NFC NFC Sheet.72 Transformer Inductor Coreless (Air conductor) Sheet.2 Sheet.3 Sheet.4 Sheet.5 Sheet.6 Sheet.7 Sheet.8 Sheet.9 Sheet.10 Induction Power Transfer Rx Coil Induction Power Transfer Rx Coil Induction Power Transfer Rx Coil Connector Arrow.74 3.3V 3.3V 3.3V Crystal Sheet.78 Sheet.79 Sheet.80 Sheet.81 Sheet.82 Sheet.83 Sheet.84 24MHz 24MHz 24MHz Connector Arrow.97 3.3V 3.3V 3.3V Connector dotted double arrow Horizontal Wire Bundle Communication Lines B.795 2 2 2 Crystal.106 Sheet.107 Sheet.108 Sheet.109 Sheet.110 Sheet.111 Sheet.112 Sheet.113 32kHz 32kHz 32kHz Antenna.1013 Sheet.124 Sheet.125 Sheet.126 Sheet.127 Sheet.128 Connector dotted line.130 Connector dotted line.131 Crystal.132 Sheet.133 Sheet.134 Sheet.135 Sheet.136 Sheet.137 Sheet.138 Sheet.139 32kHz 32MHz 32MHz Connector dotted line.141 Connector dotted line.142 For communication with smartphone or other smart appliances (ex. Extractor hood) For communication with smartphone or other smart appliances (... For communication with smartphone or other smart appliances (ex. Extractor hood) Connector Arrow.149 3.3V 3.3V 3.3V Crystal.167 Sheet.168 Sheet.169 Sheet.170 Sheet.171 Sheet.172 Sheet.173 Sheet.174 27.12MHz 27.12MHz 27.12MHz Bi-directional Vertical Wire Bundle 2 2 2 Sheet.188 Connector Arrow.189 Connector Line.193 Contact Coils to Tx Contact Coils to Tx Contact Coils to Tx Ki Wireless Power Transceiver System (Tx) Ki Wireless Power Transceiver System (Tx) Ki Wireless Power Transceiver System (Tx) Bi-directional.197 Bridge Rectifier.200 Sheet.201 Sheet.202 Sheet.203 Sheet.204 Sheet.205 Sheet.206 Sheet.207 Sheet.208 Sheet.209 Sheet.210 Sheet.211 Sheet.212 Sheet.213 Sheet.214 Sheet.215 Sheet.216 Circle.217 Circle.218 Circle.219 Circle.220 Ground.221 Sheet.222 Sheet.223 Connector Line.224 Connector Arrow.227 Power Switch Power Switch Power Switch Buck-Boost Buck-Boost Buck-Boost Connector Arrow.231 Connector Arrow.232 Connector Arrow.233 3.3V 3.3V 3.3V 3.3Vhigh 3.3Vhigh 3.3Vhigh 3.3Vlow 3.3Vlow 3.3Vlow Connector Line.237 Connector Line.238 Connector Arrow.242 3.3Vhigh 3.3Vhigh 3.3Vhigh Crystal.245 Sheet.246 Sheet.247 Sheet.248 Sheet.249 Sheet.250 Sheet.251 Sheet.252 20MHz 20MHz 20MHz Display & Touch Module Display & Touch Module Display & Touch Module Flash Flash Flash Bi-directional.265 Bi-directional.267 Connector Arrow.268 3.3Vhigh 3.3Vhigh 3.3Vhigh USB-C USB-C USB-C USB-C Sheet.272 Sheet.273 Sheet.274 Sheet.275 Sheet.276 Sheet.277 Sheet.278 Sheet.279 Sheet.280 Sheet.281 Sheet.282 Sheet.283 Sheet.284 Bi-directional.285 For debugging For debugging For debugging TFT or MIPI DSI Display TFT or MIPI DSI Display TFT or MIPI DSI Display Cap Touch Cap Touch Cap Touch SD Card SD Card SD Card WS043 WS043 WS043 Bi-directional.291 Bi-directional.292 Bi-directional.293 Vertical Wire Bundle.294 4 4 4 Sheet.296 Vertical Wire Bundle.297 2 2 2 Sheet.299 Dotted Line Isolation Isolation Isolation Connector Arrow.302 3.3Vhigh 3.3Vhigh 3.3Vhigh Connector Arrow.304 3.3Vhigh 3.3Vhigh 3.3Vhigh Connector Line.315 Line Line.318 Line.319 Connector Line.320 Sheet.321 NFC NFC NFC Dir. AC Dir. AC Dir. AC VDD VDD VDD I2C I2C I2C RTC RTC RTC Circle.176 Circle.177 Sheet.322 MCU System Control MCU System Control MCUSystem Control GPIO GPIO GPIO VDD VDD VDD Osc. Osc. Osc. I2C I2C I2C SPI SPI SPI UART UART UART Circle.90 Circle.91 Sheet.323 Bluetooth Low Energy Bluetooth Low Energy Bluetooth Low Energy VDD VDD VDD UART UART UART RTC RTC RTC RF Osc. RF Osc. RF Osc. Circle.114 Circle.115 Circle.120 Circle.121 PHY PHY PHY Sheet.324 MCU HMI Control MCU HMI Control MCUHMI Control DSI DSI DSI VDD VDD VDD Osc. Osc. Osc. I2C I2C I2C SD SD SD USB USB USB Circle.256 Circle.257 SPI SPI SPI QSPI QSPI QSPI
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