## Electronic Specifications: RSS-0509/P-R The **RSS-0509/P-R** is a high-performance, isolated DC/DC converter manufactured by **RECOM Power**. It belongs to the RSS series, which is designed for applications requiring a compact, surface-mount (SMD) power solution with high isolation. ### 1. Key Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Input Voltage** | 5V DC | Nominal (typically 4.5V – 5.5V range) | | **Output Voltage** | 9V DC | Regulated or Unregulated (depending on load) | | **Power Rating** | 1 Watt | Maximum output power | | **Output Current** | 111 mA | Rated current at 9V | | **Isolation Voltage** | 1kV DC | Input-to-output isolation | | **Efficiency** | 75% - 80% | Typical efficiency at full load | | **Package Type** | SMD | Surface Mount Device (8-pin) | --- ### 2. Breakdown of the Model Number The nomenclature provides specific details about the component's architecture: * **RSS**: **R**ecom **S**ubminiature **S**eries (Single Output). * **05**: Input Voltage (5V). * **09**: Output Voltage (9V). * **P**: Short Circuit Protection (usually indicates "Post-suffix" features like continuous protection). * **R**: Tape and Reel Packaging (industry standard for automated SMT assembly). --- ### 3. Core Features and Applications #### Hardware Features * **Isolation**: Provides a physical and electrical barrier between the input and output, which is crucial for protecting sensitive logic circuits from noise or high-voltage spikes on the supply side. * **Footprint**: Extremely small SMD footprint, saving PCB real estate compared to through-hole components. * **Operating Temperature**: Typically rated for industrial ranges (-40°C to +85°C) without derating. #### Common Uses * **Digital Isolation**: Powering the secondary side of digital isolators or optocouplers. * **Industrial Controls**: Used in PLCs and sensor interfaces. * **Data Communication**: Providing isolated power for RS-232, RS-485, or CAN bus transceivers to prevent ground loops. --- ### 4. Circuit Implementation Example When integrating this part, it is standard practice to include decoupling capacitors to reduce ripple. ```c // Typical Connection Diagram [Input 5V] ----+---- [Pin 1: +Vin] [Pin 8: +Vout] ----+---- [9V Output] | | [C_in] [C_out] | | [GND In] ----+---- [Pin 2: -Vin] [Pin 5: -Vout] ----+---- [GND Out] ```