What is a Wireless Charging IC?

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Editorial Team - everything PE

Sep 12, 2021

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Wireless charging ICs operate by utilizing the principle of electromagnetic induction to transfer energy wirelessly from a transmitter to a receiver. The transmitter employs an induction coil to generate an alternating electromagnetic field, which the receiver coil converts back into electricity and feeds into the battery of the device. This process is also referred to as inductance coupling or magnetic coupling.

The wireless charging ICs are ideal for use in smartphones, tablets, Portable Medical Devices, Power tools, Notebooks, Tablets, Water or dustproof portable devices, smart home, IoT devices, Smart Watches, Wearables, Toys, Portable Lighting, and Medical Devices.

Key features of Wireless Charging ICs:

  • Overvoltage protection.
  • Under-voltage protection.
  • Short circuit protection.
  • Over-temperature protection.
  • Offering a high level of programmability.
  • Detection of a foreign metal object to prevent undesirable heating.
  • Consume low standby power.
  • Facility to indicate operating mode and fault mode.

Key Specifications of Wireless Charging ICs:

Types of charger: It represents the type of wireless charging IC. The charging ICs are available in two types - transmitter and receiver. 

Charging standard: It represents the charging standard with which the wireless charging IC complies. WPC Qi, Airfuel, and NFC are some of the most common wireless charging standards.

WPC standard: It defines the type of coil configuration and the communication protocol so that any device operating under this standard will be able to pair with any other WPC-compliant devices. Key WPC standards are WPC MP-A11, WPC MP-A13, WPC MP-A1, WPC MP-A15, and WPC MP-A9.

Output power: It represents the output power of the wireless charging IC and is expressed in Watts (W).

Input Voltage: It represents the magnitude of the input voltage of the wireless charging IC and is expressed in volts (V).

Output Voltage: It represents the magnitude of the output voltage of the wireless charging IC and is expressed in volts (V).

Output current: It represents the magnitude of the output current of the wireless charging IC and is expressed in Ampere (A).