Renesas Electronics Corporation today announced a contactless wireless charging solution for low-power applications, such as hearing aids and other wearable devices that require resistance to water and dust.
The new wireless charging solution consists of a power receiver integrated circuit (IC) (RAA457100) and a power transmitter IC (RAA458100). Each IC includes all functions needed for wireless charging on a single chip. Renesas will also offer an evaluation kit to help manufacturers with their wireless charging designs.
Wireless charging technology eliminates the need to change batteries or connect a power cable. This convenience has wide appeal for a variety of applications, such as smartphones and wearable devices. Wireless charging technology is of particular interest in low-power applications such as hearing aids that require small form factors as well as resistance to water and dust. However, existing wireless charging technologies have been considered unsuitable for charging systems employing compact lithium-ion (Li-ion) secondary batteries for these low-power applications associated with the difficulties in achieving smaller form factors with the antenna size mandated by the current standards; and heat dispersion due to large charging currents that are required to charge low-power applications.
Renesas is positioning the new technology as a solution for system manufactures to easily add wireless charging functionality to low-power applications such as wearable devices and hearing aids.
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