Small, efficient Qi-compliant 15 W transmitter IC extends wireless charging applications

Small, efficient Qi-compliant 15 W transmitter IC extends wireless charging applications

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By eeNews Europe

Combined with a host microcontroller, the TC7718FTG realizes a wireless power transmission system compliant with Qi™ v1.2, the wireless charging standard. A 15-W wireless transmitter system based on the IC will allow quick recharging of devices — at a rate comparable to that of wired chargers.

Built on Toshiba’s proprietary, cutting-edge CD-0.13 semiconductor process, the TC7718FTG combines a compact package with high efficiency. This simplifies system integration and enables creation of charging systems with small footprints that are well suited for smartphone and tablet charging applications. In addition, the 15 W rating of the device extends the possibility of wireless charging to industrial products and other higher power applications that may require more energy or shorter charging times than consumer devices.

Wireless transmitters that use the TC7718FTG will allow designers to create Qi v1.2 compatible charging stations capable of operating with powers up to 15 W. This includes systems based on Toshiba’s recently announced TC7766WBG 15 W receiver IC, which will be in mass production this spring, as well as the company’s TC7765WBG 10 W receiver IC and TC7764WBG 5 W receiver IC, both of which are already in mass production.

Toshiba’s latest electromagnetic induction transmitter IC integrates a full-bridge gate driver, a low-dropout (LDO) regulator with a 3.3 V output and a low-pass filter for recovery of an amplitude shift keyed (ASK) signal. The TC7718FTG is housed in a compact P-VQFN36 package and can handle input voltages from 4.5 V to 25 V. Operating frequency ranges from 110 kHz to 205 kHz.

Sample shipments of the TC7718FTG wireless power transmitter IC are available now. Mass production is scheduled for spring 2016.

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