Qi-compliant 15W wireless power chip touts quick charging

Toshiba America Electronic Components Inc. has recently pushed out the door a compact and efficient 15W wireless power transmitter IC. Together with a host MCU, the TC7718FTG realises a wireless power transmission system compliant with the wireless charging standard Qi v1.2, enabling quick recharging of devices at a rate comparable to that of wired chargers, stated the company.

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 15W 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 15W. This includes systems based on Toshiba's recently announced TC7766WBG 15W receiver IC, which will be in mass production this spring, as well as the company's TC7765WBG 10W receiver IC and TC7764WBG 5W receiver IC, both of which in mass production.

Toshiba's electromagnetic induction transmitter IC integrates a full-bridge gate driver, a low-dropout (LDO) regulator with a 3.3V 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 4.5V to 25V. Operating frequency ranges from 110kHz to 205kHz.

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