The **MI-RJ2L-MZ** is a high-reliability, military-grade DC-DC converter module manufactured by **Vicor Corporation**. It belongs to the **MI-200** family of power components, specifically designed for aerospace, defense, and rugged industrial applications. --- ## 1. Part Number Breakdown Understanding the specific configuration of this module can be done by decoding the suffix: | Code Segment | Parameter | Description | | :--- | :--- | :--- | | **MI** | Series | Military Grade (Standard size) | | **R** | Input Voltage | 28V Nominal (Range: 18V – 36V) | | **J** | Output Voltage | 36V DC | | **2** | Power Level | 25 Watts | | **L** | Package Style | Standard (9-pin design) | | **MZ** | Product Grade | -55°C to +85°C Operating Temp | --- ## 2. Key Specifications The electronic architecture of this module is built around **Zero-Current Switching (ZCS)**, which reduces electromagnetic interference (EMI) and increases efficiency. ### Technical Parameters: * **Input Voltage Range:** 18V to 36V DC (Suitable for 28V aircraft/vehicle power systems). * **Output Voltage:** 36V DC. * **Output Power:** 25W. * **Isolation:** 3,000V RMS. * **Efficiency:** Typically 80% to 90%. * **Size:** 4.6" x 2.4" x 0.5" (Standard Vicor Full-Brick footprint). --- ## 3. Core Electronic Components & Features Inside the MI-RJ2L-MZ, several critical design elements ensure its reliability in harsh environments: ### A. Power Conversion Engine The unit uses a high-frequency switching topology. Unlike standard PWM converters, the ZCS (Zero-Current Switching) technology allows the internal MOSFETs to turn off when current is zero, significantly reducing stress on components and lowering thermal output. ### B. Protection Circuitry * **Overvoltage Protection (OVP):** Shuts down the module if the output voltage exceeds safe thresholds. * **Short Circuit Protection:** Current-limiting features prevent the module from burning out during a fault. * **Thermal Shutdown:** Internal sensors monitor the baseplate temperature and disable the unit if it exceeds 85°C-90°C. ### C. Environmental Hardening The "MZ" grade indicates that this part is fully encapsulated (potted) in a thermal epoxy. This protects the internal PCB from: * Mechanical Shock and Vibration (MIL-STD-810). * Moisture and Humidity. * Altitude-related pressure changes. --- ## 4. Pinout Configuration The module typically features 9 pins for integration into a system: | Pin Number | Label | Function | | :--- | :--- | :--- | | 1 | +IN | Positive Input | | 2 | GATE IN | Synchronization / Daisy Chaining | | 3 | GATE OUT | Control signal for secondary modules | | 4 | -IN | Negative Input | | 5 | +OUT | Positive Output (36V) | | 6 | +SENSE | Remote Sense (Compensates for wire voltage drop) | | 7 | TRIM | Voltage adjustment (Adjust output ±10%) | | 8 | -SENSE | Remote Sense Return | | 9 | -OUT | Negative Output | ---