The **PV-3-R** is a high-performance **high-voltage (HV) power supply module** manufactured by **Pico Electronics**. These modules are designed for precision applications requiring the conversion of low DC voltage to high DC voltage in a compact, encapsulated form factor. --- ### 1. Key Technical Specifications The "PV-3-R" designation refers to a specific configuration within the PV series. | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 5 VDC (Typical for the series) | | **Output Voltage** | 0 to 300 VDC (Variable) | | **Output Power** | 3 Watts | | **Output Current** | 10 mA (at max voltage) | | **Programming/Control** | 0 to 5V Analog signal | | **Package Type** | PC Mount (Encapsulated) | --- ### 2. Major Electronic Components & Features Inside the PV-3-R module, several critical electronic stages work together to provide stable high voltage: * **Internal Oscillator:** Converts the DC input into a high-frequency AC signal. High frequency allows for a much smaller transformer size. * **Step-Up Transformer:** A miniature ferrite core transformer that increases the AC voltage to the desired range. * **Voltage Multiplier/Rectifier:** A network of high-voltage diodes and capacitors (often a Cockcroft-Walton generator) that converts AC back to DC and multiplies the voltage. * **Control Loop (The "R" Suffix):** The "R" usually denotes a **Regulated** or **Remote Programmable** model. It contains an internal error amplifier that compares the output voltage against a reference signal to maintain stability despite load changes. * **Encapsulation:** The entire circuit is potted in a thermally conductive epoxy. This protects the components from moisture and prevents high-voltage "arcing" (electrical breakdown) between parts. --- ### 3. Pin Configuration (Typical) Most Pico PV modules utilize a standard 7-pin or 9-pin layout: 1. **Input (+):** Positive supply voltage. 2. **Input Ground:** Common return. 3. **V-Ref/Control:** Input signal to set the output voltage level. 4. **Output (+):** High voltage output. 5. **Output Ground:** High voltage return (often isolated from input ground). --- ### 4. Common Applications Due to its small size and reliability, the PV-3-R is used in specialized electronic fields: * **Photomultiplier Tubes (PMT):** Providing the precise bias voltage required for light detection. * **Avalanche Photodiodes (APD):** High-speed optical communication components. * **Piezoelectric Transducers:** Driving small actuators that require high voltage to move. * **Scientific Instrumentation:** Used in portable mass spectrometers or gas chromatography.