The **MHO+28FAD-R** is a high-performance, military-grade DC-DC converter produced by **Crane Aerospace & Electronics (Interpoint)**. It belongs to the MHO+ Series, designed specifically for aerospace, defense, and high-reliability industrial applications. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the MHO+28FAD-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage (Nominal)** | 28 VDC | | **Input Voltage (Range)** | 16 to 40 VDC | | **Output Voltage** | Dual Output: ±15 VDC | | **Output Power** | Up to 65 Watts | | **Efficiency** | 83% to 87% (Typical) | | **Isolation** | 100MΩ minimum at 500 VDC | | **Operating Temperature** | -55°C to +125°C | | **Case Size** | 3.00 × 1.50 × 0.40 inches | --- ### 2. Part Number Breakdown Understanding the suffix and prefix codes helps identify the specific features of this model: * **MHO+**: The series name (High power, high density DC-DC converter). * **28**: Indicates the nominal input voltage (28 Volts). * **F**: Indicates the output configuration (Dual output). * **AD**: Indicates the specific output voltage combination (±15V). * **-R**: Typically signifies a specific revision or a lead-finish/environmental screening level (often "Reduced" or specific radiation hardening/compliance features depending on the manufacturer's current datasheet). --- ### 3. Core Features & Protections The electronic architecture of this part includes several advanced protection and control circuits: * **Magnetic Isolation:** Uses a flyback or forward converter topology with magnetic feedback to provide galvanic isolation between input and output. * **Inhibit Function:** Allows the converter to be turned on or off remotely using a logic-level signal. * **Soft Start:** Gradually increases the output voltage during power-up to limit inrush current and prevent overshoot. * **Protection Suites:** * **Overvoltage Protection:** Prevents damage to downstream components. * **Short Circuit Protection:** Features "hiccup" or constant current limiting to survive indefinite short circuits. * **Undervoltage Lockout (UVLO):** Ensures the device only operates when the input voltage is within a safe range. --- ### 4. Typical Applications Due to its rugged construction and hermetically sealed package, the MHO+28FAD-R is found in: 1. **Avionics:** Flight control systems and cockpit displays. 2. **Military Ground Vehicles:** Power distribution for communication gear. 3. **Satellite Systems:** Remote sensing and telemetry power (if "R" designates specific radiation tolerance). 4. **Missile Systems:** Guidance and navigation power supplies. ---