Other documents can be downloaded from the technical information site for engineers.
Advantages of 13.56 MHz (NFC) Wireless Charging
for Compact Device under 200mW
Save the space for charging
"No constraints on design" of devices
Compared to the charging from a USB connector, the conventional charging method for compact devices such as wearables, the wireless charging system equipped with LAPIS Technology's 13.56 MHz (NFC) wireless charging chip set, "ML7630/7631", can save the space for charging function.
Using an ultra-compact antenna as well as an antenna for NFC communication simultaneously can reduce the implementation area down to "about 50%" for compact cube antenna, and "about 75%" for a flexible antenna.
When compared to other charging systems, the 13.56 MHz (NFC) wireless charging that can use ultra compact antennas offers more "compact implementation".