The **MI-RJ73** is a specialized high-reliability power supply module, specifically a DC-DC converter designed by Vicor. It is part of the MI-200 series, which is engineered for military and aerospace applications requiring ruggedization and high performance in harsh environments. --- ### 1. Key Technical Specifications The part number "MI-RJ73" provides specific data about its input, output, and power capabilities based on the Vicor naming convention. | Parameter | Specification | Details | | :--- | :--- | :--- | | **Input Voltage** | 165 Vdc | Range typically accommodates 125V to 400V depending on series | | **Output Voltage** | 24 Vdc | Fixed regulated output | | **Output Power** | 100 Watts | Maximum continuous power rating | | **Operating Temp** | -40°C to +85°C | Industrial/Military Grade (I-Grade) | | **Efficiency** | 80% to 90% | Typical for the MI-200 series architecture | --- ### 2. Physical and Design Features The MI-RJ73 is built using a "Brick" form factor, which is standard for high-density power modules. * **ZCS/ZVS Topology:** It utilizes Zero-Current Switching and Zero-Voltage Switching, which minimizes switching losses and reduces Electromagnetic Interference (EMI). * **Encapsulation:** The internal components are fully potted (encapsulated) to protect against vibration, shock, and moisture. * **Baseplate Cooling:** The unit is designed to be mounted to a heatsink or cold plate via its aluminum baseplate to manage thermal dissipation. --- ### 3. Protection and Control Features To ensure the safety of the sensitive electronics it powers, the module includes several internal protective circuits: 1. **Overvoltage Protection (OVP):** Shuts down the unit if the output exceeds a safe threshold. 2. **Short Circuit Protection:** Current-limiting features to prevent damage during a fault. 3. **Output Trimming:** Allows for minor adjustments to the 24V output voltage using an external resistor. 4. **Remote Sense:** Compensates for voltage drops across the leads between the power supply and the load. --- ### 4. Applications The MI-RJ73 is typically found in systems where failure is not an option and environmental conditions are extreme: * **Defense Systems:** Airborne radar, ground vehicle displays, and communications. * **Aerospace:** Satellite subsystems and avionics. * **Industrial:** High-reliability heavy machinery control units.