The **GS-R415/2** is a classic high-efficiency, step-down (buck) switching voltage regulator module, originally manufactured by STMicroelectronics. It belongs to the GS-R400 family, designed to provide a regulated output from a higher DC input voltage. --- ### ## Technical Specifications The GS-R415/2 is known for its high output current capability and wide input range. | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 18V to 40V DC | | **Output Voltage** | 15V DC (Fixed) | | **Max Output Current** | 4.0 Amperes | | **Efficiency** | Typically 80% to 90% | | **Switching Frequency** | ~100 kHz | | **Package Type** | Vertical or Horizontal SIP (Single In-line Package) | --- ### ### Internal Electronic Components Unlike a single-chip IC, the GS-R415/2 is a **Hybrid Module**. Inside its metallic or plastic casing, it contains several discrete and integrated components: 1. **Switching Regulator IC:** Usually based on the L296 or similar controller, which manages Pulse Width Modulation (PWM). 2. **Power MOSFET/Transistor:** Acts as the high-speed switch to chop the input voltage. 3. **Power Inductor:** A core component that stores energy during the "on" cycle and releases it during the "off" cycle to maintain steady current. 4. **Schottky Diode:** Used for commutation (freewheeling) to provide a path for the inductor current when the switch is open. 5. **Filter Capacitors:** High-quality electrolytic or ceramic capacitors used to smooth input ripples and stabilize output voltage. --- ### ### Pinout Configuration The module typically features a 12-pin or 15-pin layout (depending on the specific series variant), but the primary functional pins are: * **V_in:** Unregulated DC input. * **V_out:** Regulated 15V output. * **Ground:** Common return path for input and output. * **Inhibit:** A logic-level input used to turn the module on or off remotely. * **Sense:** Used to compensate for voltage drops across long PCB traces to ensure exactly 15V at the load. --- ### ### Key Features and Protections * **Short-Circuit Protection:** The module enters a "hiccup" mode or current limiting state if the output is shorted. * **Thermal Shutdown:** Automatically turns off if the internal temperature exceeds safe limits. * **Soft Start:** Gradually increases the output voltage upon power-up to prevent current spikes. * **Low EMI:** The metal shielding (on specific models) reduces electromagnetic interference with surrounding circuits.