With smartphones and other tech gadgets all around us, wireless chargers can make our lives much easier and cheerful. In this article, you can learn how to make a wireless charger using some industry-standard reference designs. Having all the design files and other necessary documents will make it very easy to complete your design without much rework and failures. Take a look!
1. 5W Automotive Wireless Charger For Smartphones:
This is a 5W wireless transmitter designed for automotive wireless charging applications. The design is Qi-certified as a WPC-A13 transmitter type and uses multi-coil to support any Qi-enabled smartphone. Advanced features such as NFC, CAN, touch sense, and robust foreign object detection algorithm are supported. The design also addresses automotive specific issues such as EMC, key FOB and Start/Stop. More on this Reference design.
2. NFC-enabled Wireless Charger For Bluetooth Speakers & Smartphones:
NXP offers a smart wireless charging reference design for 19V Qi transmitters. By featuring NFC (Near Field Communication), it enables advanced use cases like zero-power standby, automatic Bluetooth pairing, user-defined charger settings, and many more. Consumers can configure wireless charging pad settings via any NFC-enabled phone or tablet, and NFC could be used to trigger “tap to power on” feature of the wireless charger, for zero standby current when not in use. Other smart features include automatic Bluetooth pairing, or launching applications and websites when an NFC-enabled phone is put on the charging pad. More on this Reference design
3. 15W Wireless Charger For Smartphones/ePOS Terminals/Battery Banks:
Freescale offers a reference design of a wireless charging transmitter with target applications including mobile phone chargers, Tablet PCs, Point-of-sale terminals, hand-held medical devices, mobile phone accessories such as battery banks and active phone sleeves. The reference design uses Freescale’s innovative wireless charging transmit controller IC to perform digital demodulation on incoming signals from the receiver. This unique feature provides a major reduction in BOM costs and reduces the PCB footprint. An additional feature of the solution is robust foreign object detection (FOD) which detects metallic objects, such as aluminum or steel objects which may be present in the charging environment. More on this Reference Design
4. Wireless Charger For Wearables:
TI’s Qi-compliant wireless charger design is suitable for low power wearable devices such as smart clothing, smart watches, ID tags, portable medical meters, ECG, etc. Designed for 135mA charge current application, the design features an ultra small size (5x15mm2), and utilizes a Qi compliant wireless receiver (bq51003) and ultra low current 1 cell Li-ion linear charger (bq25100). More on this Reference Design