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Ultra-thin And Fast-Charging Capacitor Powers Smart Cards

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Ultra-thin And Fast-Charging Capacitor Powers Smart Cards

An ultra-thin, high-energy capacitor suitable for powering devices such as electronic paper displays in smart cards has been released by TDK.

The new device, EDLC041720-050-2F-13, will be available in a volume of 27 x 17 x 0.45mm, so it can be mounted inside a smart card or other thin device. As the company claims, the capacitor can provide around 50mJ of energy to power a load when fully charged. Compatible with radio-frequency energy harvesting circuits, the device’s 5mF capacitance can be charged in less than 1s by the field emitted by a standard NFC reader.

According to the company, the capacitor can also be charged by other forms of harvested energy such as solar energy. The device is said to be resistant to damage by twisting and bending though it is only about one fifth as thick as TDK’s previous generation of EDLCs. Offering a long operating lifetime, the device is rated for operation over a temperature range of -20 to 60°C, and is also resistant to electro-static discharges and pressure.

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