The **RTS-153.3/P-R** is a high-precision, isolated DC/DC converter belonging to the **RTS series** manufactured by RECOM Power. This specific model is designed for industrial applications requiring high power density and reliable isolation in a compact surface-mount package. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Input Voltage** | 15V DC (Nominal) | | **Output Voltage** | 3.3V DC | | **Output Current** | 606mA | | **Power Rating** | 2 Watts | | **Isolation Voltage** | 1kV DC (standard) | | **Efficiency** | ~70% to 75% | | **Package Type** | SMD (Surface Mount Device) | | **Mounting Style** | P-R (Reflow Solderable, DIP-8 footprint) | --- ### 2. Breakdown of the Model Name Understanding the nomenclature helps identify the specific capabilities of this component: * **RTS**: Series designation (Unregulated, 2W DC/DC converter). * **15**: Nominal Input Voltage (15V). * **3.3**: Nominal Output Voltage (3.3V). * **/P**: Short-circuit protection (usually continuous). * **-R**: Tape and Reel packaging (standard for automated SMD assembly). --- ### 3. Core Electronic Components & Architecture The internal circuitry of the RTS-153.3/P-R typically consists of several functional blocks: #### A. Power Stage (Inverter) The 15V DC input is fed into an internal oscillator circuit. This circuit converts the DC current into high-frequency AC. This high frequency allows for the use of a very small internal transformer. #### B. Isolation Barrier The core of the device is a **toroidal transformer**. This provides galvanic isolation between the input and output (1kV DC), preventing noise or high-voltage spikes from passing through to sensitive 3.3V components. #### C. Rectification & Filtering The AC from the transformer's secondary side is converted back to DC using high-speed diodes. Output capacitors are integrated to minimize voltage ripple, ensuring the 3.3V supply is stable. #### D. Protection Circuitry The **/P** designation indicates that the part includes enhanced protection features, specifically aimed at preventing damage during an output short-circuit condition. --- ### 4. Typical Applications * **Industrial Automation:** Providing isolated power to logic gates and microcontrollers (3.3V) from a 15V rail. * **Data Communication:** Eliminating ground loops in RS-485 or CAN bus interfaces. * **Sensor Power:** Providing clean, isolated power to analog-to-digital converters (ADCs).