## Overview of FSP015-RADM-NP The **FSP015-RADM-NP** is a high-quality AC-to-DC switching power adapter manufactured by **FSP Group**. It is primarily designed for low-power electronic devices, such as network routers, modems, and small point-of-sale (POS) equipment. --- ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 100V - 240V AC (Universal) | | **Input Frequency** | 50Hz - 60Hz | | **Output Voltage** | 12V DC | | **Output Current** | 1.25A | | **Total Power** | 15 Watts | | **Efficiency** | Level VI (High Efficiency) | | **Plug Type** | Wall-mount (Non-polarized) | | **Connector** | Typically 5.5mm x 2.1mm (Barrel Jack) | --- ### Key Internal Electronic Components The internal circuitry is built as a **Switching Mode Power Supply (SMPS)**. Below are the core electronic segments: 1. **Input Protection (EMI Filter):** * **X-Capacitors & Common Mode Chokes:** These suppress electromagnetic interference (EMI) from leaking back into the power line. * **Fuse:** Provides over-current protection in case of a component failure. 2. **Rectification and Filtering:** * **Bridge Rectifier:** Converts the 120V/240V AC input into high-voltage DC. * **Bulk Capacitor:** Large electrolytic capacitor used to smooth the rectified DC ripple. 3. **PWM Controller & MOSFET:** * The heart of the unit, which "chops" the DC voltage at high frequencies to be processed by a small transformer. This is what makes the unit compact and efficient. 4. **High-Frequency Transformer:** * Provides **galvanic isolation** between the high-voltage AC side and the low-voltage DC side. 5. **Output Secondary Stage:** * **Schottky Diodes:** Rectifies the high-frequency AC from the transformer back to DC. * **Low ESR Capacitors:** Filters the output to ensure a steady 12V signal with minimal noise. --- ### Safety and Protection Features * **Over-Voltage Protection (OVP):** Shuts down the unit if the output voltage exceeds safe limits. * **Over-Current Protection (OCP):** Prevents damage if the connected device draws more than 1.25A. * **Short Circuit Protection (SCP):** The unit will safely cycle or shut down if the DC wires are crossed. * **Certifications:** Typically carries UL, CE, FCC, and TUV markings, ensuring it meets international safety standards. ---