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Reference Solutions

A baseline for wireless charging

Wireless charging is gaining in popularity, with consumers taking to its convenience and ease of use. Devices can now be easily charged and ready to go without the need for power cords. A universal technology standard, Qi, has in fact been established by the Wireless Power Consortium. Widespread industry adoption means QI is now available in many locations where charging is most needed, like airports, automobiles, hotels and offices.

The Baselines Power Profile or BPP comprises the minimum set of features applying to power transmitters and power receivers that can transfer around 5W of power. These are compliant with Wireless Power Consortium standards for charging handphones, medical devices and wearable applications. To support this demand, Avnet offers a wide range of low charging solutions.  Our GDS customized solutions come with a customer support model that involves definition & requirement, development, certification and production.

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TI – Low Power Solution

Features

  • Proven, Qi-certified value solution for transmitter side application.
  • Fully WPC compliant, including improved foreign object detection (FOD) method.
  • Permits X7R type resonant capacitors for reduced cost.
  • Dynamic power limiting™ for USB and limited source operation.
  • Digital demodulation reduces components.
  • LED indication of charging state, fault status.
  • Low standby and high efficiency.

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Key Components

  • Transmitter Controller: BQ500212A (TI)
  • Current Shunt Monitor: INA199A1 (TI)
  • Power Stage: CSD97394Q4M*2 (TI)
  • LDO: TLV70033DDC (TI)
  • Coil: A11 coil (Gotrend)


Target Applications

  • Standard low power transmitter.
  • WPC compliant wireless transmitters for smart phones, medical and wearable applications.

Mixed Media - ti lp solution2-1

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TI – Low Power Solution

Features

  • 5-V Transmitter AFE compatible with wireless power consortium (WPC) v1.2 A11 low-power transmitter Specification.
  • Integrates all the analog functions required in a wireless power transmitter.
    • MOSFET drivers and synchronous N-channel power FETs.
    • Accurate current sense.
    • Variable frequency oscillator.
    • High-efficiency voltage regulator.
    • High-sensitivity demodulator to decode signals from receiver.
  • 2-Chip solution enables high-efficiency, transmitter designs of >75% efficiency.

Mixed Media - ti lp solution2-2

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Key Components

  • Transmitter Controller: BQ50511ARHAR (TI)
  • Power Stage: BQ50002ARHBR (TI)
  • Coil: A11 coil


Target Applications

  • Standard low power transmitter.
  • WPC compliant wireless transmitters for smart phones, medical and wearable applications.