The **TDK-Lambda ZWS300BAF-15/CO2** is a professional-grade, high-reliability AC-DC single-output power supply. It is part of the ZWS-BAF series, designed for industrial automation, testing equipment, and telecommunications. Below is a breakdown of its technical specifications and electronic characteristics. --- ### 1. Model Nomenclature Breakdown | Segment | Meaning | Detail | | :--- | :--- | :--- | | **ZWS** | Series Name | Single output AC-DC PCB type power supply | | **300** | Power Rating | 300 Watts output capacity | | **BAF** | Feature Set | High efficiency, active PFC (Power Factor Correction) | | **15** | Output Voltage | 15V DC nominal output | | **CO2** | Option Code | **C**oating on both sides of the PCB (Protects against humidity/dust) | --- ### 2. Key Electrical Specifications The electronic architecture is designed for high efficiency and stability under varying loads. * **Input Voltage Range:** 85 - 265VAC (Universal Input) or 120 - 370VDC. * **Efficiency:** Typically **88% - 91%** (reduces heat dissipation). * **Output Current:** Up to **22A** (at 15V). * **PFC (Power Factor Correction):** Active PFC compliant with IEC61000-3-2, ensuring low harmonic distortion. * **Cooling:** Convection cooled (no fans required) up to 200W, or forced air cooling for full 300W performance. --- ### 3. Core Electronic Components & Features The internal circuitry utilizes high-quality industrial components to ensure a long service life (MTBF). #### A. Input Protection & Filtering * **EMI Filter:** Integrated circuits to minimize conducted and radiated noise. * **Inrush Current Limiting:** Thermistors or power resistors protect the bridge rectifier from high current spikes at startup. * **Fuse Protection:** Internal AC line fuse for catastrophic failure protection. #### B. Power Conversion Stage * **Main Transformer:** High-frequency ferrite core transformer for isolation and voltage step-down. * **MOSFETs:** High-speed switching transistors used in the PFC and DC-DC conversion stages. * **Secondary Rectification:** High-efficiency Schottky barrier diodes or synchronous rectification to minimize conduction losses. #### C. Control & Monitoring * **Overcurrent Protection (OCP):** Constant current limiting with automatic recovery. * **Overvoltage Protection (OVP):** Inverter shut down if the output exceeds approximately 115-135% of nominal voltage. * **Thermal Protection:** Internal sensors to prevent damage from overheating. --- ### 4. Environmental & Physical Attributes | Feature | Description | | :--- | :--- | | **Conformal Coating (/CO2)** | The PCB is coated with a protective film to prevent corrosion from humidity and airborne contaminants. | | **Form Factor** | Open frame PCB (Dimensions: approx. 84 x 45 x 180 mm). | | **Operating Temp** | -10°C to +70°C (with derating above 50°C). | ---