The **RSS-3.312/P-R** is a high-performance, miniature DC/DC converter manufactured by **RECOM Power**. It belongs to the RSS series, which is specifically designed for industrial applications requiring isolation and voltage regulation in a compact SMD package. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Input Voltage** | 3.3V DC (Nominal) | | **Output Voltage** | 12V DC | | **Output Current** | 84mA (Max) | | **Power Rating** | 1 Watt | | **Isolation Voltage** | 1kV DC (Standard) | | **Efficiency** | 75% - 80% (Typical) | | **Package Type** | SMD (Surface Mount Device) | | **Operating Temperature** | -40°C to +85°C (Full Load) | --- ### 2. Deep Dive into Part Number Suffixes The suffix `/P-R` provides critical information regarding its physical build and packaging: * **`/P`**: Indicates **Short Circuit Protection**. This feature ensures the device shuts down or limits current during a fault to prevent damage to the converter or the PCB. * **`-R`**: Indicates **Tape and Reel** packaging. This is intended for automated SMT (Surface Mount Technology) assembly lines using pick-and-place machines. --- ### 3. Core Features & Architecture * **Regulated vs. Unregulated:** The RSS series typically offers regulated outputs, meaning the 12V output remains stable even if the 3.3V input fluctuates slightly or the load changes. * **Galvanic Isolation:** It provides 1kV DC isolation between the input and output circuits. This is essential for breaking ground loops and protecting sensitive logic-level components from high-voltage transients. * **Compact Footprint:** Designed for high-density boards where space is at a premium. It eliminates the need for bulky heat sinks due to its high efficiency. --- ### 4. Typical Applications 1. **Industrial Control Systems:** Converting 3.3V logic supply to 12V for analog sensors or small relays. 2. **Communication Ports:** Providing isolated power for RS232, RS485, or CAN bus drivers. 3. **Medical Equipment:** Used in non-patient-critical circuits for signal isolation. 4. **Distributed Power Architectures:** Used as a "point-of-load" converter to provide localized 12V rails from a 3.3V main bus. --- ### 5. Implementation Example (Schematic Logic) ```c // Basic Connection Logic [3.3V Input Source] ----> [Pin 1: +Vin] [GND Source] ----> [Pin 2: -Vin] [Pin 5: -Vout] ----> [Isolated Ground] [Pin 8: +Vout] ----> [12V Load/Circuit] ``` *(Note: Always refer to the specific datasheet pinout as SMD footprints can vary by sub-series.)*