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What is a wireless charger receiver

What is a wireless charger receiver

What is a wireless charger receiver?

Wireless charger receivers are integrated into devices such as phones, tablets, automobiles, medical equipment, and others. To ensure the compatibility of wireless charging, there are two main standards that have been used Qi/WPC and Airfuel/PMA. Most devices follow one of these standards and thus as long as they follow these specifics, they will be interoperable across device manufacturers.

How it works

Wireless charging receivers are used to receive wireless power from a transmitter to charge a battery. Electro-Magnetic signals are received from the wireless power that is connected to a coil. The receiver IC thereby converts this received signal into a current that is used to charge the battery.

What is wireless charging? 

Wireless charging is that the transfer of power from an influence outlet to your device, without the requirement for a connecting cable. It involves an influence transmitting pad and a receiver, sometimes within the variety of a case attached to a mobile device or built into the phone itself

Wireless charging (also called inductive charging) could be a sort of wireless power transfer. It uses electromagnetic induction to produce electricity for portable devices. The most common application of the Qi wireless charging standard is in mobile devices such as; smartphones, tablets, and smartwatches.

Inductive charging is additionally employed in vehicles, power tools, electric toothbrushes, and medical devices. The portable equipment may be placed near a charging station or inductive pad while not having to be precisely aligned or make contact with a dock or plug.


Induction power transfer was first utilized in 1894 and later in 1972 by Professor Don Otto of the University of Auckland when he proposed a vehicle powered by induction using transmitters within the road and a receiver on the vehicle. And since then, it’s evolved from one stage to the opposite until 2006, when MIT began using a resonant coupling.

They were able to transmit an outsized amount of power without radiation over some meters. This proved to be better for commercial needs, and it had been a significant step for inductive charging. Wireless charging is now generally accepted and adopted into many devices like mobile devices, automobiles, and some medical devices.


  • Protected connections.
  • Low infection risk.
  • It increases convenience and aesthetic quality; so there will be no need for cables.
  • Automated high power inductive charging of electric vehicles allows for more frequent charging events and consequently an extension of the practice range.
  • An inductive charging system is operated automatically.
  • Automatic operations of inductive charging theoretically allow the vehicle to run indefinitely.
  • Enables charging of electrical vehicles while in motion is enabled by Inductive charging of electrical vehicles at high power levels.


  • Slower charging.
  • More expensive.
  • Inconvenience – most of the charging devices must be left on a pad to charge, thus cannot be moved around or allow to be operated on while charging.
  • Compatible standards – Not all devices are compatible with different inductive chargers. However, some devices have begun to support multiple standards.
  • Inefficiency – Inductive charging is not as efficient as direct charging and this causes greater heat production when compared to traditional charging.


Standards seek advice from the various set of operating systems with which devices are compatible. There are two main standards: Qi and PMA. Though two standards operate very similarly, they use different connection protocols and transmission frequencies.

Thanks to this, devices compatible with one standard aren’t necessarily compatible with the opposite standard. However, there are devices compatible with both standards.

  • The upcoming SAE J2954 standard will allow inductive car charging over a pad, with power delivery up to 11 kW.
  • Qi, an interface standard developed by the Wireless Power Consortium for inductive electrical power transfer. At the time of July 2017, it’s the foremost popular standard within the world, with quite 200 million devices supporting this interface.
  • AirFuel Alliance:
  • The Power Matters Alliance (PMA) will concentrate on the creation of an inductive power ecosystem
  • The Alliance for Wireless Power (A4WP) developed Rezence as an interface standard.
  • A4WP and PMA merged into the AirFuel Alliance in 2015.

Many manufacturers of smartphones have started adding this technology into their devices, the bulk adopting the Qi wireless charging standard.

Samsung and other companies have begun exploring the thought of surface charging building an inductive charging station into a complete surface like a desk or table.


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