E2Watt

High Power, Long Distance, High Efficiency Inductive Wireless Power

E2Watt is Eggtronic’s proprietary inductive wireless charging technology.

While offering backward compatibility with Qi, E2Watt offers significantly higher power ratings (up to 300W today with the next generation being able to work at >10kW), improved efficiency (up to 95% from DC input on TX side to DC output on RX side) and operation over extended distances.

Because it can be supplied directly from the AC mains (90-264VAC input), it supports a reduced BOM and increased performance, removing the need for an external AC/DC adapter, ensuring at the same time efficiency higher than 91% (from AC input on TX side to DC output on RX side).

E2Watt also provides a proprietary data channel able to reduce latency and increase bandwidth, resulting in a data-over-power channel able to hit Gbps super-speed data transfer, which can be used for any consumer, industrial and automotive application where high speed wireless data are needed together with wireless power.

Schematics

Direct AC input single stage 60W E2Watt transmitter based on EPIC201xxEExx coupled to 60W E2Watt receiver based on EPIC201xxEEIxx

Efficiency vs. Load

(measured from DC input on transmitting side to DC output on receiving side)

KEY ELEMENTS

  • Eggtronic patented topology for inductive wireless power
  • Single-stage primary: optional AC input or DC input wireless transmitter
  • Single-stage secondary: rectifier + regulator
  • ZVS always guaranteed: not based on resonant tank / not dependent on load

KEY BENEFITS

  • Higher power transmission
  • Flat efficiency for different loads (always ZVS)
  • Higher overall efficiency: as efficient as a wired converter
  • Reduced BOM and lower overall cost
  • Very compact solution
  • Better EMI performance
  • High robustness

KEY FEATURES

  • Compatible with Qi 1.3 wireless power transfer
  • High power (up to kW)
  • AC input or DC input
  • High efficiency (up to 96% with DC input, up to 91% with direct AC input)
  • High distance (depending on mechanical constraints)
  • Custom-optimized coils provided
  • Receiver can be provided with different output configurations:
    • Fixed voltage
    • CC/CV battery charger
    • USB Power Delivery 3.1
  • Low-latency high-bandwidth data-over-power

DEMO BOARDS

65W AC INPUT - BATTERY CHARGER OUTPUT - DEV-BOARD
  • Input voltage = 90-264VAC
  • No need for external AC/DC adapter → very compact, higher overall efficiency
  • Dev-board for high power battery charger applications such as home appliances and laptop
  • Maximum output power = 65W
  • Efficiency from AC input on transmitting side to DC output on receiving side > 91%
  • Charging distance = up to 8mm
  • Single optimized custom coil
  • GaN FETs
  • High-speed capacitive data communication
65W AC INPUT -> USB PD 60W WIRED OUTPUT+ Qi 15W LONG DISTANCE
  • Input voltage = 90-264VAC
  • No need for external AC/DC adapter → very compact, higher overall efficiency
  • Maximum output power = 65W with wireless/wired power share
  • Charging distance = up to 40mm
  • Qi-compatible 15W wireless output
  • USB PD 60W output
  • FOD (foreign object detection) protection
  • Single optimized custom coil
  • GaN FETs
  • Universal IEC C8 input connector

CONTROLLERS

EPIC101AxEExx

High-Power Wireless Transmitter Controller

  • Up to 10kW wireless power
  • Optionally back-compatible with Qi (in low power applications)
  • I2C / SPI / UART / USB low-latency high-bandwidth data-over-power
  • Highly customizable I/O
  • Fixed frequency and variable frequency working modes
  • High-speed capacitive data communication
  • Integrated comparator for packet demodulation
EPIC102AxEExx

High-Power Wireless Receiver Controller

  • Up to 10kW wireless power
  • Optionally back-compatible with Qi (in low power applications)
  • Battery Charger (CC /CV), fixed voltage, USB Power Delivery 3.1 output
  • I2C / SPI / UART / USB low-latency high-bandwidth data over power
  • Highly customizable I/O
  • High efficiency synchronous rectification
  • High speed capacitive data communication
  • Integrated comparator for packet demodulation
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