The **IPZA65R018CFD7** is a high-performance power MOSFET manufactured by **Infineon Technologies**. It belongs to the **CoolMOS™ CFD7** series, which is specifically designed for high-power resonant topologies. --- ### 1. Technical Specifications The part number encodes specific technical attributes of the component. Below are the primary electrical characteristics: | Parameter | Value | | :--- | :--- | | **Drain-Source Voltage ($V_{DS}$)** | 650V | | **Static Drain-Source On-Resistance ($R_{DS(on)}$)** | 18 mΩ (Max) | | **Continuous Drain Current ($I_D$)** | ~100A (at 25°C) | | **Integrated Fast Body Diode** | Yes (CFD series) | | **Package Type** | TO-247 4-pin (Kelvin Source) | | **Gate Charge ($Q_g$)** | ~175 nC | --- ### 2. Key Features and Technologies #### A. CoolMOS™ CFD7 Technology This is Infineon’s latest generation of high-voltage superjunction MOSFETs. The "CFD" designation indicates an **integrated fast body diode**, which makes it ideal for soft-switching applications where commutation of the body diode occurs. #### B. Kelvin Source Configuration (4-pin Package) Unlike standard 3-pin TO-247 packages, this part uses a **4-pin layout**. * **Purpose:** It separates the power source path from the gate-drive return path (Kelvin Source). * **Benefit:** It reduces the influence of source inductance, leading to faster switching speeds, lower switching losses, and significantly improved gate signal integrity. #### C. Extremely Low $R_{DS(on)}$ With a resistance of only **18 mΩ**, it offers industry-leading efficiency by minimizing conduction losses in high-current applications. --- ### 3. Application Areas The IPZA65R018CFD7 is engineered for high-density power conversion in the following sectors: 1. **Server & Telecom Power Supplies:** Ideal for the PFC (Power Factor Correction) and LLC stages. 2. **EV Charging Stations:** High-power DC-DC converters. 3. **Solar Inverters:** Optimized for efficiency in string inverters. 4. **Uninterruptible Power Supplies (UPS):** High-efficiency energy conversion. --- ### 4. Schematic Symbol & Pinout The 4-pin configuration is typically mapped as follows: ```text Pin 1: Gate (G) Pin 2: Kelvin Source (S_k) -> For Driver Reference Pin 3: Power Source (S) -> For Power Loop Pin 4: Drain (D) -> High Voltage Input ``` ---