Trying so as to add wi-fi charging to your designs? Discover an answer that mixes Qi 1.1 compatibility, battery charging, and LED driving in a single package deal. Learn extra!
The Qi wi-fi charging LED lantern reference design from Microchip is a flexible and cost-effective resolution for design engineers seeking to combine wi-fi charging into their purposes. The design encompasses a Qi 1.1 commonplace receiver, supporting a most energy of 5W, and makes use of an 8-bit microcontroller for seamless communication and charging.
This lantern is suitable with any wi-fi charging transmitter and features a totally useful Lithium-Ion charging controller, together with the excessive effectivity of a switching energy provide. Utilizing this reference design, engineers can shortly add wi-fi charging performance to numerous purposes.
The reference design is moveable and versatile, making it appropriate for numerous use instances. It encompasses a Qi 1.1 suitable wi-fi receiver, enabling the opportunity of encapsulating the ultimate product for dust- and waterproof purposes.
Key options of the lantern embody receiver implementation utilizing a general-purpose 8-bit microcontroller, enabling straightforward integration into completely different programs and purposes. The lantern can also be suitable with the Qi 1.1 (5W) commonplace, making it appropriate for any Qi 1.1 suitable wi-fi charging transmitter. Moreover, the lantern options correct energy measurement, which aids within the International Object Detection (FOD) perform, making certain protected and environment friendly charging.
The design showcases a Qi 1.1 receiver implementation and a bidirectional switching energy provide for battery charging and LED driving. This design demonstrates the best way to use a Qi 1.1 wi-fi receiver to cost a Lithium-Ion battery, then enhance the battery voltage to energy a string of LEDs. The system is powered by a PIC16F18325 microcontroller together with a number of analog parts.
The design has a number of notable options. The enter voltage from the wi-fi receiver coil ranges from +4.5V to +28V. It makes use of a +5V provide for low voltage energy, regulated by an MCP1804 LDO. The design implements the Qi 1.1 5W wi-fi charger communication protocol within the microcontroller’s firmware. It’s supposed to work with a 2000 mAh Li-Ion battery, charging at 1A with a voltage of 4.2V. The system drives a 3-LED string with a most present of 200 mA at 9V.
The reference design makes use of a synchronous buck converter topology, making certain excessive effectivity. It additionally incorporates a bidirectional buck or enhance converter, pushed by a PFM sign. This converter gives each charging and discharging modes: buck mode to cost the battery and enhance mode to energy the LED string from the battery. Moreover, the design features a full charging algorithm for Lithium-Ion batteries, applied in firmware. For the LEDs, 4 dimming ranges can be found: 25%, 50%, 75%, and 100%.
Microchip has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has extra information concerning the reference design. To learn extra about this reference design, click on right here.
