The **A5114-R** is a specific electronic part number most commonly associated with **Sanken Electric Co.** It belongs to the **STR-A5100 series**, which are power ICs designed for switching mode power supplies (SMPS). Below is a detailed breakdown of the technical specifications and features of this component. --- ## 1. Core Component Overview The A5114-R is an integrated circuit (IC) that combines a **Power MOSFET** and a **Current Mode PWM Controller** in a single package. It is primarily used in small-scale AC/DC adapters and auxiliary power supplies. | Feature | Specification | | :--- | :--- | | **Part Number** | STR-A5114-R | | **Manufacturer** | Sanken Electric Co. | | **Package Type** | DIP-8 (Dual In-line Package) | | **Primary Function** | PWM Control Switching Regulator | | **Main Components** | Power MOSFET + Controller IC | --- ## 2. Key Technical Specifications The "14" in the part number designates the power handling capability, while the "R" often refers to the specific revision or packaging style (usually indicating low standby power features). | Parameter | Value (Typical) | | :--- | :--- | | **Drain-Source Voltage ($V_{DSS}$)** | 650V (Minimum) | | **Drain-Source On-Resistance ($R_{DS(on)}$)** | ~3.95 $\Omega$ | | **Oscillation Frequency** | 67 kHz (Fixed) | | **Input Voltage Range** | AC 85V to 264V (Universal) | | **Max Output Power** | ~13W (Open Frame) / ~8W (Adapter) | --- ## 3. Internal Features and Protections The A5114-R is designed for high efficiency and high reliability. It includes several integrated protection circuits to prevent damage to the power supply: * **Green Mode Function:** Automatically reduces the oscillation frequency under light load conditions to minimize power consumption (Standby power < 30mW). * **Current Mode PWM Control:** Provides stable regulation and cycle-by-cycle current limiting. * **Safety Protections:** * **OCP:** Overcurrent Protection (Pulse-by-pulse). * **OLP:** Overload Protection (Auto-restart). * **OVP:** Overvoltage Protection. * **TSD:** Thermal Shutdown. --- ## 4. Typical Pin Configuration (DIP-8) | Pin No. | Name | Description | | :--- | :---: | :--- | | 1 | **D/ST** | MOSFET Drain / Startup power input | | 2 | **S/OCP** | MOSFET Source / Overcurrent detection | | 3 | **VCC** | Power supply for the control circuit | | 4 | **GND** | Ground | | 5 | **FB/OLP** | Feedback input / Overload protection | | 7, 8 | **Drain** | High voltage output pins | --- ## 5. Applications The STR-A5114-R is widely used in the following devices: * **White Goods:** Control power for washing machines and refrigerators. * **Consumer Electronics:** Standby power supplies for TVs and Audio systems. * **Adapters:** Small AC/DC wall chargers for low-power devices. * **Industrial:** Auxiliary power for factory automation sensors.