The **M2AS1-5113-R2** is a specialized power supply module, typically categorized as a **Redundant AC/DC Power Module**. These units are commonly found in high-availability enterprise environments such as servers, industrial computers, and network storage arrays. ### Technical Specifications The following table outlines the core electronic characteristics of the module: | Component/Feature | Description | | :--- | :--- | | **Form Factor** | Slim 1U / Server Power Module | | **Input Voltage** | 100 - 240V AC (Auto-ranging) | | **Input Frequency** | 47Hz - 63Hz | | **Max Output Power** | Approx. 400W - 500W (Model dependent) | | **Output Rails** | +12V, +5V, +3.3V, +5Vsb, -12V | | **Cooling** | Internal 40mm High-speed fan | | **Protection** | OVP (Over Voltage), OCP (Over Current), SCP (Short Circuit) | --- ### Key Electronic Sections #### 1. Input Stage (EMI Filtering) This section contains **X and Y capacitors** and **common-mode chokes**. Its primary purpose is to filter out electromagnetic interference (EMI) from the AC line and prevent the power supply's high-frequency switching noise from leaking back into the grid. #### 2. PFC (Power Factor Correction) As an enterprise-grade unit, it utilizes **Active PFC**. This circuit uses a controller IC and a large inductor to ensure the current waveform follows the voltage waveform, improving efficiency and reducing harmonic distortion. #### 3. Main Switching Topology The "R2" revision likely utilizes a **Forward** or **LLC Resonant converter** topology. This involves: * **High-voltage MOSFETs:** These switch the rectified DC at high frequencies (usually 65kHz to 100kHz). * **Main Transformer:** Provides galvanic isolation and steps down the voltage. #### 4. Secondary Rectification & DC-DC Conversion Modern high-efficiency modules often use **Synchronous Rectification** (using MOSFETs instead of diodes) on the +12V rail to reduce heat loss. Lower voltages (+5V and +3.3V) are often derived from the +12V rail using integrated **DC-DC buck converters**. #### 5. Redundancy Logic The "M2AS" series is designed for **Hot-Swapping**. * **ORing Diodes/MOSFETs:** These allow multiple power supplies to be connected to the same bus without one back-feeding the other. * **I2C / PMBus Interface:** Allows the server motherboard to monitor fan speed, temperature, and current draw in real-time. --- ### Component Identification If you are performing a repair or teardown, look for these common components: * **Bulk Capacitor:** Usually rated for 420V or 450V. * **Control ICs:** Commonly manufactured by brands like *Infineon*, *STMicroelectronics*, or *Champion Micro*. * **Connector:** A proprietary "gold finger" or blade-style edge connector that slides into a power distribution board (PDB).