P9415-R datasheet(14/62 Pages) RENESAS

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P9415-R Datasheet

May 4, 2021

6. Wireless Power Charging System

A wireless power charging system has a base station with one or more transmitters that make power available via DC-to-AC inverter(s), and

transmit the power over a strongly-coupled inductor pair (magnetic induction) or over a loosely-coupled inductor pair (magnetic resonance) to

a receiver in a mobile device. A WPC 1 system uses near field magnetic induction between coils and can be a free-positioning or

magnetically-guided type of system.

In WPC systems, the amount of power transferred to the mobile device is controlled by the receiver. The receiver sends communication packets

to the transmitter to increase power, decrease power, or maintain the power level. The bit rate for Rx-to-Tx communication link is 2kbps for

WPC receivers and is amplitude modulated (ASK) on top of the power link that exists.

Figure 2. Block Diagram of WPC System

Base Station

Transmitter

Mobile Device

Receiver

Transmitter

Power

Power Conversion

Power Pick- up

Control

Messages

Comm

Reflected Load

Mod

DeMod

For the most current information, see the WPC specification at http://www.wirelesspowerconsortium.com/.

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