The **RSS-2409/P-R** is a high-performance, regulated DC/DC converter manufactured by **RECOM Power**. It belongs to the Econoline series and is specifically designed for industrial applications requiring high isolation and a wide operating temperature range. ### 1. Key Specifications | Feature | Specification | | :--- | :--- | | **Input Voltage Range** | 18V - 36V DC (2:1 Wide Input) | | **Output Voltage** | 9V DC | | **Output Current** | 222mA | | **Power Rating** | 2 Watts | | **Isolation Voltage** | 1kV DC (Standard) | | **Efficiency** | 80% - 83% (Typical) | | **Package Type** | SMD (Surface Mount Device) | --- ### 2. Internal Electronic Architecture The device utilizes several critical internal components and topologies to achieve its conversion: * **Switching Controller:** Uses a high-frequency PWM (Pulse Width Modulation) controller to convert the DC input into an AC signal for the internal transformer. * **Isolation Barrier:** Features an internal transformer that provides galvanic isolation between the input and output circuits, protecting sensitive downstream components from noise or surges. * **Linear Regulator Stage:** Unlike unregulated converters, the "RSS" series includes a regulation circuit that ensures the output remains at 9V even if the input voltage fluctuates between 18V and 36V. * **Filter Network:** Built-in capacitors and inductors help minimize output ripple and noise (typically around 50mVp-p). --- ### 3. Pin Configuration and Suffix Meanings Understanding the nomenclature is vital for PCB design: * **RSS:** Series name (Single Output, SMD package). * **24:** Nominal Input Voltage (24V). * **09:** Nominal Output Voltage (9V). * **"/P":** Indicates **Short Circuit Protection**. The "P" suffix means the device can withstand a continuous short circuit without permanent damage. * **"-R":** Indicates **Tape and Reel** packaging, intended for automated pick-and-place assembly. --- ### 4. Typical Application Circuit To use this part effectively, peripheral components are usually recommended to reduce EMI: ```c +Vin ----------------+---------+ | | C1 (10uF) [ RSS-2409/P-R ] --- +Vout (9V) | | | -Vin ----------------+---------+ C2 (4.7uF) | | GND --------+ ``` --- ### 5. Pros and Cons * **Pros:** Very small footprint, regulated output (stable voltage), and high reliability (MTBF > 1 million hours). * **Cons:** Higher cost compared to unregulated versions; requires specific thermal management if operated at the maximum 85°C ambient temperature. ---