A compact wi-fi charger design that follows Wi-fi Energy Consortium (WPC) normal for establishing wi-fi communication and holds Qi certification.
Wi-fi chargers present the comfort of charging units without having bodily connectors or cables. They provide a clutter-free charging expertise, permitting customers to position their units on a charging pad or stand merely. This know-how eliminates the effort of tangled cords and allows extra seamless and environment friendly charging. To simplify the design course of Texas Devices (TI) has launched a reference design of a wi-fi charger for low-power wearable functions that comply with Wi-fi Energy Consortium (WPC) requirements for establishing wi-fi communication and is Qi Licensed. The design is optimized for low-power wearable units requiring a Qi-compliant wi-fi receiver and an ultra-low present 1-cell Li-ion linear charger.
The reference design excels at dealing with charging currents as little as 10 mA and as excessive as 250 mA, accommodating termination currents as little as 1 mA. The wi-fi charger’s design is compact and particularly tailor-made for functions requiring a cost present of 135 mA. The design makes use of the bq51003 low-power wi-fi receiver and the bq25100 linear charger as its core parts. The wi-fi receiver consists of rectification, voltage conditioning, and controller blocks that work collectively to facilitate environment friendly wi-fi charging. Combining the wi-fi receiver or charger design with a wi-fi transmitter Built-in Circuit (IC) makes creating an entire charging answer easy.
The lithium-ion linear charger cell has a most battery cost present of 250 mA, offering ample capability to cost practically all wearable units obtainable in the present day inside a two-hour timeframe. Given the constraint of restricted battery capability, each milliampere-hour (mAh) turns into essential for maximizing the system’s runtime. The lithium-ion linear charger cell excels in correct programming and controlling the termination present, setting a brand new business normal that may go as little as 1 mA. To optimize the efficient battery capability, it’s equally essential to attenuate pointless energy consumption. The linear charger demonstrates distinctive efficiency on this regard. It boasts a most battery leakage present specification of 75 nA, spanning temperatures from 0°C to 125°C. To place this into perspective, it could take roughly 152.2 years for a 100 mAh battery to discharge at this present. In actuality, the present is negligible, because the self-discharge charge of the battery cell far exceeds it.
This reference design has been examined by TI. It comes with a Invoice of Materials (BOM), schematics, Gerber file, Printed circuit board (PCB) structure, computer-aided design/ computer-aided engineering (CAD/CAE) symbols, Meeting drawing, and so forth. You will discover extra knowledge in regards to the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.
