## STPS50U100CT: Power Schottky Rectifier The **STPS50U100CT** is a high-performance power Schottky rectifier designed for high-frequency switch-mode power supplies (SMPS) and DC-DC converters. It is manufactured by STMicroelectronics and is known for its low power losses and high efficiency. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the STPS50U100CT: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Repetitive Peak Reverse Voltage** | $V_{RRM}$ | 100 | V | | **Average Forward Current (Per Diode)** | $I_{F(AV)}$ | 25 | A | | **Total Average Forward Current** | $I_{F(AV) Total}$ | 50 | A | | **Forward Voltage Drop (Typical)** | $V_F$ | 0.64 (@ 25A) | V | | **Maximum Junction Temperature** | $T_j$ | 175 | °C | | **Package Type** | - | TO-220AB | - | --- ### 2. Internal Configuration The "CT" suffix indicates a **Common Cathode** configuration. Inside the TO-220 package, there are two Schottky diodes: * **Pin 1:** Anode 1 * **Pin 2:** Cathode (Connected to the metal tab) * **Pin 3:** Anode 2 This dual-diode setup is ideal for **Center-Tap Transformers** or for paralleling the diodes to handle higher currents (up to 50A combined). --- ### 3. Features and Advantages * **Low Forward Voltage Drop ($V_F$):** Reduces conduction losses, which improves overall system efficiency. * **High Frequency Operation:** Schottky diodes have virtually no reverse recovery time, making them perfect for fast switching. * **Avalanche Capability:** Rated to withstand specific levels of reverse surge energy, providing a safety margin against voltage spikes. * **Low Leakage Current:** ST’s "U" (Ultra-low) series technology optimizes the trade-off between $V_F$ and reverse leakage current ($I_R$). --- ### 4. Typical Applications The STPS50U100CT is commonly found in the following circuits: 1. **Secondary Rectification:** In AC/DC switch-mode power supplies. 2. **Freewheeling Diode:** Used in motor control and inductive load switching. 3. **OR-ing Diodes:** In redundant power supply systems to prevent backflow. 4. **DC-DC Converters:** High-speed rectification in telecommunications and server power. --- ### 5. Schematic Symbol (Conceptual) ```text Anode 1 (Pin 1) ----|>|----| |---- Cathode (Pin 2 / Tab) Anode 2 (Pin 3) ----|>|----| ```