Epson Develops Contactless Power Transmission Module

(Product News, 30 Sep 2008)

Seiko Epson Corp. (Epson) has developed a highly efficient module enabling non-contact power transmission. The S4E96400/S4E96401 set, which consists of both primary and secondary coil/control modules, uses Epson technology to allow very high-efficiency—up to 70 percent—non-contact power transmission up to 2.5W (5V/500mA). Since all components necessary for non-contact power transmission are built into the module, it is simple to install in devices.

The product is made up of a power transmission module (primary module: S4E96400) and a power receiving module (secondary module: S4E96401). The flat coil used for power transmission results in a very slim secondary coil unit, just 0.8mm thick. Electromagnetic shielding fitted to the back of the transmission surface in each module reduces interference with other electronic components contained within the same device.

The module has a wide array of safety features. In-built metal detection (foreign matter detection), secondary detection (ID validation), and automatic cut-off in the event of excess current or abnormal temperature (temperature detection) enable customers to incorporate advanced safety measures for non-contact power transmission into their designs.

Demand for wireless power transmission is growing day by day as new wireless devices evolve. This product solves problems associated with conventional external power supplies using contact terminals, namely contact terminal degradation and insufficient power supply due to bad connections. Customers can also use it for non-contact charging of devices that could previously only be powered by a conventional plug-in power supply. Moreover, the module is highly suited to creating devices with more sophisticated designs, since there is no need for customers to place a power supply terminal on the exterior of their devices.

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