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Date: 11-01-14

Qi 1.1 compatible wireless charging Ics

In last week, two new wireless power ICs compatible with Qi low-power specifications version 1.1 were announced.

Toshiba America Electronic Components, Inc., (TAEC) has announced TB6865FG power transmitter and TC7763WBG receiver chipset to handle 5 -watt power transfer and is compatible with the Qi low-power specifications version 1.1 standards developed by Wireless Power Consortium (WPC).

The TB6865FG integrates an MCU and can drive 4 external MOSFET H Bridges of 4 coils for a free positioning architecture supporting two mobile devices. The TC7763WBG receiver combines modulation and control circuitry with a rectifier power pickup, built-in Linear Dropout Regulator (LDO) and circuit protection functions. The transmitter IC is housed in a LQFP-100 14x14mm package and the receiver IC is supplied in a compact WCSP-28 2.4mm x 3.67mm x 0.5mm package.

The TAEC power transmitter and receiver chipset, TB6865FG and TB7763WBG, is currently sampling and the sample price of the TB6865FG power transmitter is $7.00 and the TB7763WBG receiver is $3.50, announced by TAEC.

Another expert of wireless power ICs Integrated Device Technology has also announced the Qi-compliant single-chip wireless power transmitter solution supporting a 5V input.

The IDTP9038 is a single-chip wireless power transmitter IC compatible with the Wireless Power Consortium (WPC) 1.1 “Qi” standard for A5 and A11 coil configurations. IDTP9038 operates from a 5V input, allowing it to be powered by any standard USB port, USB wall adapter, or traditional 5V adapter.

The IDTP9038 embeds microcontroller and full-bridge inverter with low-resistance FETs. IDT claims its patent-pending control circuit offers world-class EMI performance measured at 15 dB lower than CISPR requirements, reducing concerns of cross-talk with other sensitive electronics. The 5V device features USB connectivity meeting the requirements of BCS 1.2 (D+/D- detection) for fully controlled power delivery and added safety.

IDTP9038 features a proprietary high-power transfer mode capable of delivering up to 60% more power than specified by the Qi standard – transmitting up to 8 watts of power when paired with an IDT wireless power receiver, as per IDT.

The IDTP9038 is currently sampling to qualified customers and is available in a standard 7x7 mm 56-ld VFQFN package.

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