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Qi® Wireless Charging LED Lantern Reference Design

Our Qi® wireless charging LED lantern is a lighting solution that is able to draw up to 5W from a base station and charge a Li-Ion battery wirelessly at 1A. Adding wireless charging capabilities to a portable lighting solution enables the device to be sealed to create a waterproof or weather-resistant product.

A bi-directional synchronous buck converter is used for charging the battery. The same converter can boost the battery voltage to drive a dimmable string of three LEDs at 200 mA. A single 8-bit microcontroller (MCU) manages the Qi communication, battery charging and driving the LEDs, simplifying the design and reducing the cost.

Key Features of this Reference Design:

  • Able to draw up to 5W from a base station
  • Charges a Li-Ion battery at 1A
  • Uses a bi-directional synchronous buck converter
SAMA5D27 System-on-Module (SOM) Reference Design SAMA5D27 System-on-Module (SOM) Reference Design