(iTers News) - Toshiba America Electronic Components, Inc. unleashes a free positioning wireless chipset for a wireless charging system that charges smartphones and other mobile devices on a battery charging pad.

Consisting of high-efficiency power transmitter and receiver, the chipset is fully compliant with the Wireless Power Consortium, or WPC Qi interface specification, A4, A8, A12 and A14.

It includes the TB6865FG power transmitter and TB6860WBG receiver, featuring a two-coil control architecture for cost-effective battery charging.

The working theory is straightforward. The position of a mobile device is detected by the TB6865FG and only one of the coils is energized for charging, thereby preserving efficiency and allowing product freedom of placement.

As a result, end users can place a Qi-capable mobile product on a Qi-compliant charging surface and achieve up to 74% efficiency across a majority of the charging area.

In addition, the design flexibility of the TB6865FG allows the control of two coils, so two mobile products can be charged simultaneously.

Toshiba's new chipset is built with its microcontroller and analog IC technology, boasting high levels of integration to reduce component count, board space and bill of material, or BOM cost.

Cutbacks on BOM 

The TB6865FG transmitter integrates both microcontroller and analog elements, including PWM circuitry, switching control, on-board filter and a pre-driver circuit.

The TB6860WBG receiver embeds modulation and control circuitry with a rectifier power pickup, built-in high-performance DC-DC buck converter and protection functions.

The TB6860WBG offers a programmable charging profile via I2C control, which provides an integrated DC-DC converter for high-efficiency, high-current charging with a charge current of up to 1.2A.

Integrated protection for the receiver IC covers input voltage, output current and over-temperature conditions.

The TB6865FG is supplied in a LQFP100 14mm x 14mm package while the TB6860WBG is supplied as a WCSP39 4.25mm x 2.65mm device. TB6865FG and TB6860WBG will begin sampling in the first quarter of 2013.

Toshiba has been a member of the WPC since it joined the consortium in 2011.

 

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