Continental WCA NFC 2.0 Multi-Functional Smartphone Terminal User Manual

Continental WCA NFC 2.0 Multi-Functional Smartphone Terminal

System Description

Continental Wireless Power Charger is developed for automotive applications under the name WCA NFC 2.0 which includes two functions like:

• WPC: Wireless power charger; WPC Function 126.6kHz
• NFC: Near Field Communication; NFC Function 13.56MHz

The WCA NFC 2.0 module and its implementation inside the vehicle is depicted in Fig. 1. Its assembly instruction is done by professional workers. Therefore, the product cannot be moved or switched to another position by the end user.

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WCA NFC 2.0 charger uses Qi standard of Wireless Power Consortium (WPC) for enabling wireless charging from a base station unit to mobile device. The power transfer method is based on near field magnetic induction between coils.

System Overview

• The structure of wireless power transfer proposed in Fig. 2 shows an overview of the system with two kinds of distinguished devices: Base station and Mobile device.
• Base station comprises two main functional units per mode (WPC and NFC), namely power conversion units and Communications & Control units for delivering, controlling and regulating the transferred power.
• Mobile device (power receiver) comprises a power pick up unit and a communications & control unit for achieving power requirements and charging the device battery if is chargeable device or establishing an active NFC communication.

Wireless Power Charger Description
The WCA NFC 2.0 is mainly composed of 6 parts as depicted in Fig.3.

1. Top housing
2. Antenna PCB
3. WPC coil + Ferrite + Plastic Holder
4. Main PCB with 8 ways connector: diagram below in Fig 4, pins description in Table1.

5. Bottom Housing + Fan cover
6. Fan

A picture of a serial production part is shown in Fig. 5.

WCA NFC 2.0 modes
According to the Qi standard, a simple operational description of wireless power transfer can be summarized in two principle operational modes:

• The first mode with a defined burst sequence allows the transmitter to detect an object on the charging surface: IDLE mode
• The second mode allows the power transfer from the base station to the mobile device, placed on the charging surface: Charging mode

The transition between these two modes is realized through a transient mode: Detection mode. which only occurs when the Mobile device is placed on the charging surface.

Product parameters
Below in table 2, the technical parameters of the WCA NFC 2.0 product are specified:

WPC parameters
Below in table 3, the technical parameters of the WPC feature are specified:

NFC Parameters
Below in table 4, the technical parameters of the NFC feature of WCA NFC 2.0:

NFC antenna

• The NFC block is composed of three antennas: Main, Side1 and Side 2 antenna.
• The electrical parameters of the NFC antenna are listed in the following tables (5,6 and 7):

Main NFC antenna:

Table 5: Main NFC antenna technical parameters

Side 1 NFC antenna:

Side 2 NFC anteena

Overview of “WCA NFC 2.0”
Here below the product overview of “WCA NFC 2.0”:

References

• Continental Automotive - Passenger Cars Home

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