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Toshiba rolls out wireless power charging chips

Posted: 21 Sep 2015     Print Version  Bookmark and Share

Keywords:Toshiba  wireless power  MCU  Qi  WPC 

Toshiba has developed a line of ICs for wireless power charging that are compliant with the Wireless Power Consortium (WPC) Qi interface specification. These include a power transmission controller IC that consists of a microcontroller and controller chips in one package and a power receiving controller IC that features a quick charge function with a LDO regulator. These devices allow free positioning wireless charging of mobile applications, stated the company.

The TB6865AFG is a transmitter IC for wireless power transfer. It integrates dedicated analogue circuitry and an ARM Cortex-M3 processor in the same package, simplifying the development of a Qi-compliant power transmission pad (base station). Toshiba also offers a receiver IC for Qi wireless power transfer applications. These transmitter and receiver ICs combine to make it possible to transfer power from the power transmitter to the power receiver.


The TB6865AFG is compliant with the A11, A12 and A14 power transmitter designs defined in the WPC low-power standard, Version 1.1l supports an analogue power supply from 4.5V to 15V; offers simultaneous charging of up to two mobile devices; provides support for foreign object detection via Analog Ping and is available in a 100-pin LQFP.

Application samples of the device include WPC-compliant wireless power transmission pad for charging mobile devices and mobile device accessories rated at 5W or lower.

The TC7763WBG is a receiver IC for Qi wireless power transfer applications. Fabricated using a CMOS/DMOS hybrid process, the TC7763WBG claims to deliver high efficiency and low heat generation. It generates system control protocols stipulated in the Qi standard in hardware, eliminating the need for an external MCU. This makes it possible to create a receiver module with a single chip.

System block diagram

System block diagram

The device features an on-chip Qi protocol control logic; 95 per cent max efficiency (by receiver only); 30 per cent reduction in heat generation; and is compliant with Version 1.1 of the WPC low-power standard, which contains an enhancement for foreign object detection (FOD). It is available in a 28-pin WCSP.

Application samples of the device include WPC-compliant smartphones and other mobile devices, and mobile device accessories rated at 5W or lower.

Wireless power transfer applications

Wireless power transfer applications

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