The **WCT-512-R/E** is a high-performance Wireless Charging Transmitter (WCT) module, typically designed for automotive or industrial applications. It is engineered to meet Qi-standard requirements (WPC - Wireless Power Consortium) and focuses on multi-coil designs for flexible charging positioning. --- ### 1. Core Electronic Components The functionality of the WCT-512-R/E is driven by several key internal stages: | Component Type | Function | Details | | :--- | :--- | :--- | | **Microcontroller (MCU)** | System Logic & Control | Usually powered by an NXP (e.g., MWCT series) or similar automotive-grade processor to manage the Qi protocol. | | **Power Bridge** | Inverter Stage | Consists of MOSFETs (Full-bridge or Half-bridge) that convert DC input into a high-frequency AC signal. | | **Multi-Coil Array** | Energy Transfer | Features a 3-coil or similar arrangement to allow for larger charging surfaces and "free positioning" of the device. | | **Resonant Tank** | Frequency Tuning | A combination of high-precision capacitors (C-series) and the primary coil (L) to reach LC resonance. | | **Demodulator Circuit** | Communication | Monitors shifts in current/voltage to decode the FSK/ASK data sent back by the receiver device. | --- ### 2. Technical Specifications Below are the typical operating parameters for this class of transmitter: * **Input Voltage:** 9V to 16V (Optimized for 12V automotive batteries). * **Output Power:** Support for 5W (Baseline Power Profile) up to 15W (Extended Power Profile). * **Operating Frequency:** 110 kHz to 205 kHz. * **Efficiency:** Typically >70% depending on coil alignment. * **Protections:** * **FOD (Foreign Object Detection):** Detects metal objects (coins, keys) to prevent overheating. * **OTP/OVP:** Over-temperature and Over-voltage protection. --- ### 3. Connection and Interface Logic The module interacts with the host vehicle or system through specific electrical interfaces: ```yaml Interfaces: - CAN Bus: For vehicle diagnostics and status reporting. - LIN Bus: Used for lower-speed peripheral communication. - GPIOs: For LED status indicators (Charging, Error, Standby). - Power In: Hardwired 12V DC input with EMC filtering. ``` --- ### 4. Hardware Implementation Flow 1. **DC Filtering:** Input power passes through an EMI filter to prevent noise from affecting the vehicle's radio. 2. **Inversion:** The MCU drives the MOSFET drivers to switch the DC into AC. 3. **Coil Selection:** The module detects which coil is closest to the phone and activates only that specific bridge. 4. **Feedback Loop:** The module constantly adjusts the frequency or duty cycle based on the "Error Control Packet" received from the smartphone.