The **STI19NM65N** is a high-voltage N-channel Power MOSFET developed by STMicroelectronics. It belongs to the **MDmesh™ II** series, which utilizes a proprietary strip layout and vertical structure to minimize on-resistance and optimize switching performance. --- ### 1. Key Technical Specifications The table below summarizes the primary electrical characteristics of the STI19NM65N: | Parameter | Symbol | Value | | :--- | :--- | :--- | | Drain-Source Voltage | $V_{DS}$ | 650 V | | Continuous Drain Current | $I_D$ | 15.5 A | | Static Drain-Source On-Resistance | $R_{DS(on)}$ | 0.230 $\Omega$ (max) | | Total Gate Charge | $Q_g$ | 50 nC | | Max Power Dissipation | $P_{tot}$ | 125 W | | Package Type | - | I²PAK (TO-222) | --- ### 2. Core Technologies & Features The STI19NM65N is engineered for high efficiency in demanding power conversion environments: * **MDmesh™ II Technology:** This technology reduces the $R_{DS(on)}$ per area, allowing for smaller packages to handle higher currents without excessive heating. * **Low Input Capacitance:** It features low gate charge ($Q_g$), which facilitates faster switching speeds and reduces the power required to drive the gate. * **High $dv/dt$ Ruggedness:** The device is highly resistant to rapid voltage changes, ensuring stability in high-frequency switching applications. * **100% Avalanche Tested:** Each unit is tested to ensure it can withstand energy spikes (avalanche breakdowns) without failing. --- ### 3. Pin Configuration (I²PAK) The STI19NM65N typically uses the **I²PAK** (similar to TO-220 but for surface/through-hole mounting) pinout: 1. **Gate (G):** Controls the biasing of the MOSFET. 2. **Drain (D):** Connected to the high-voltage load (usually the metal tab is also Drain). 3. **Source (S):** Connected to the common ground or current sense resistor. --- ### 4. Common Applications Due to its high voltage rating and low on-resistance, this MOSFET is commonly found in: * **Switch Mode Power Supplies (SMPS):** Used in the primary side for AC-DC conversion. * **Lighting Ballasts:** High-efficiency electronic ballasts for HID or fluorescent lamps. * **DC-DC Converters:** High-power modules for industrial and telecommunication equipment. * **Solar Inverters:** Used in the power stage for converting DC from panels to AC.