The **MI-RJ22-MY** is a high-reliability, isolated DC-DC converter manufactured by **Vicor Corporation**. It is part of the MI-200 series, specifically designed for military and aerospace applications where compact size and high efficiency are critical. --- ### 1. Technical Specifications The part number `MI-RJ22-MY` follows a specific nomenclature that defines its electrical characteristics: | Parameter | Value / Detail | | :--- | :--- | | **Input Voltage** | 28V Nominal (Range: 18V to 50V) | | **Output Voltage** | 15V DC | | **Output Power** | 50 Watts | | **Product Grade** | Military (M-Grade) | | **Operating Temp** | -55°C to +85°C | | **Efficiency** | 80% to 90% (Typical) | --- ### 2. Core Electronic Features The MI-RJ22-MY utilizes advanced power conversion technologies to provide stable power in harsh environments: * **Zero-Current Switching (ZCS):** Unlike traditional PWM converters, this uses ZCS to virtually eliminate switching losses, allowing for higher frequency operation and reduced EMI. * **Isolation:** Provides input-to-output isolation (typically up to 3,000Vrms), protecting sensitive loads from input transients or ground loops. * **Boost/Buck Topology:** It can handle wide input swings (common in military vehicle or aircraft power systems) while maintaining a steady 15V output. * **Encapsulation:** The internal components are potted in a thermal epoxy to provide mechanical rigidity and protection against moisture and vibration. --- ### 3. Pinout & Connectivity The module is typically a "Half-Brick" or "Junior" size with the following functional pin groupings: | Pin Type | Description | | :--- | :--- | | **Input (+/-)** | Connection to the raw DC source (e.g., 28V battery system). | | **Output (+/-)** | The regulated 15V output to the load. | | **Gate In / Out** | Used for synchronizing multiple modules in parallel for higher power. | | **Sense (+/-)** | Compensates for voltage drops along the output leads to ensure 15V at the load. | | **Trim** | Allows the user to adjust the output voltage up or down slightly. | --- ### 4. Implementation Example (Basic) To use this part, external capacitors are required for ripple filtering and stability: ```cpp // Schematic Logic Representation [28V Input] ----> [MI-RJ22-MY] ----> [15V Output] | | (Input Cap) (Output Cap) | | [Ground Plane] ``` ---