The **RSS-3.305-R** is a high-performance, sub-miniature, isolated DC/DC converter manufactured by RECOM Power. It belongs to the Econoline series and is specifically designed for applications where board space is at a premium and high efficiency is required. --- ### ## 1. Key Specifications The following table outlines the primary electrical characteristics of the RSS-3.305-R: | Parameter | Specification | | :--- | :--- | | **Input Voltage (Nominal)** | 3.3V DC | | **Output Voltage** | 5V DC | | **Output Current** | 200mA | | **Power Rating** | 1 Watt | | **Efficiency** | 70% - 75% (Typical) | | **Isolation Voltage** | 1kV DC (Standard) | | **Package Type** | SMD (Surface Mount Device) | | **Operating Temperature** | -40°C to +85°C (without derating) | --- ### ## 2. Core Functional Components The "R" in the part number typically signifies a specific reel packaging or a design revision for surface mount compatibility. Internally, the device consists of: 1. **Oscillator/Switching Circuit:** Converts the incoming 3.3V DC into a high-frequency AC signal. 2. **Transformer:** Provides galvanic isolation and steps up the voltage from 3.3V to the level required for 5V output. 3. **Rectification & Filtering:** Converts the AC back into smooth 5V DC. 4. **Protection Circuitry:** Includes short-circuit protection (typically momentary) to prevent component failure during faults. --- ### ## 3. Pin Configuration (SMD) The RSS series uses a specific SMD pinout. Below is the functional description for a standard 8-pin SMD layout (often with pins removed for creepage): | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | -Vin | Ground (Input) | | 2 | +Vin | Positive Input (3.3V) | | 4 | -Vout | Common (Output) | | 5 | +Vout | Positive Output (5V) | | 8 | NC | No Connection (Internal use only) | --- ### ## 4. Common Applications * **Digital Logic Level Shifting:** Powering 5V logic components from a 3.3V primary rail. * **Isolation:** Breaking ground loops in sensitive analog-to-digital measurement circuits. * **Industrial Controls:** Providing isolated power for RS-485 or CAN bus transceivers. * **Portable Electronics:** Where compact size and high power density are required.