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Proxi-2D EVK Development Kit Contents

September 9, 2014 / 0 Comments / 369 / Consumer Electronics Solutions

On the back of the recent release of our resonant Proxi-2D EVK Development Kit, this video looks to provide a bit more insight into the technology behind the transmitter and receiver.

The EVK Development Kit includes ten key components packaged in two layers.  Aside from the transmitter and receiver units, the kit includes, two 2mm spacers, a Power supply for the Tx, USB to Serial cable, Adaptor board, Ribbon cable, Mini USB cable and IEC power cord.


Setting up the Transmitter:

Setting up the transmitter for use is as simple as connecting the provided power cable.

The Tx consists of a single controller circuit board and coil array.  At the front there are three LED indicators that designate different operating states.  The center red LED indicates when power is being supplied to the transmitter.  The Blue LEDs on the either side will indicate if the when the board is scanning for devices and when charging is occurring.

At initial start up, the transmitter will perform an initial Board scan to detect any receivers that are on the surface of the pad.  Once powered, the board will continuously perform a loop detection to check if an object has been placed on, or removed from the transmitter pad.  A board scan is performed whenever the loop detection detects a receiver being placed on the charging surface. This scan is highlighted by both blue LEDs flashing for three seconds.  During this process a Digital ping is performed on each coil in the Transmitter array to check whether there is a receiver present.

Depending on where a receiver is placed, an LED will stop flashing and remain on – indicating that power is being transferred to a receiver.  The transmitter will enter Resonant mode if a Proxi-2D receiver is detected, otherwise it will enter Inductive or Qi mode if a Qi version 1.1 receiver is detected.

Resonant Receiver module:

The Receiver module itself consists of an Rx coil and circuit board placed inside a plastic sleeve or enclosure.  A series of five labeled LED indicators on the circuit board designate the amount of power being transferred to the receiver as well as the mode of operation.  In this instance the receiver is operating in Resonant mode and is receiving 5Watts of power from the transmitter.

The Rx receives a signal from the Proxi-2D Tx which will inform it to switch to Resonant mode, otherwise it will assume that it has been placed on a Qi Transmitter and will operate in Inductive or Qi mode.

Extended Z Height Testing:

Included within the kit are two 2mm clear spacers. These spacers enable for users to test the system at three different Z heights or coil to coil distances – 3mm, 5mm and 7mm.  The different spacing is achieved by simply inserting spacers between the Rx and Tx boards.  The system will perform in the exact same manner at the different heights.

In our next video we will explain how to set up the system for testing and highlight the functionality of our unique control application software.

Making a Wireless Power Charging Standard, What is the right Frequency?

September 11, 2012 / 0 Comments / 141 / Consumer Electronics Solutions

Continuing on from my previous blogs regarding wireless power & charging standards and comparing various stances on the wireless charging of electronic devices – today I want to discuss the respective positions on frequency.

I have written in the past about convenience for Consumers in wirelessly charging mobile devices.   Some of the key factors are:

  • loosely coupled” or the ability to “drop and forget” which means you don’t have to work hard in making sure your smartphone is aligned or oriented precisely on the charging pad for it to charge
  • Simultaneously charging multiple devices such as a smartphone, a tablet, a remote control, gaming controller,… at the lowest cost

While the Consumer Electronics Association WG4 will deliver on the above, there is an on-going debate to select the right frequency.

Of course the Wireless Power Consortium has defined a specification for frequencies below 500 KHz.  Such products have been shipping and proven to be safe and reliable.

At the same time, another working group called the A4WP is driving a specification for a frequency of 6.78 MHz – making it incompatible with products now shipping. In addition, the 6.78 MHz frequency has not yet been proven to meet safety and emission requirements, while is also expected to cost more.

Does it not seem obvious that Consumer Electronics Association WG4 select a frequency less than 500 KHz, which has been proven to meet the safety and emission standards, is the lowest cost for consumers, and is interoperable?

Let me now your thoughts.

 Tony Francesca is VP of Business Development – Consumer Technologies