The **BP2-R** typically refers to a specific model of a **Dual-Channel Battery Power System/Charger**, widely used in the professional broadcast and film industry (often compatible with V-Mount or Gold-Mount batteries). Below is a breakdown of its core electronic components and their functions. --- ### 1. Power Input & Conversion Stage The BP2-R is designed to handle high-voltage AC input and convert it into low-voltage DC for charging and camera operation. | Component | Description | Function | | :--- | :--- | :--- | | **AC Inlet** | IEC C14 Socket | Connects to 100V–240V AC universal power. | | **Switching Power Supply (SMPS)** | Internal AC/DC Converter | Steps down AC voltage to ~16.8V DC for charging. | | **EMI Filter** | Electromagnetic Interference Filter | Reduces noise and prevents interference with sensitive audio/video gear. | --- ### 2. Charging & Management Circuitry This is the "brain" of the BP2-R, ensuring that Li-ion batteries are charged safely and efficiently. * **Microcontroller Unit (MCU):** Monitors the battery's state of charge (SoC), temperature, and voltage. It communicates via the battery's data pins (SMBus or I2C protocol). * **Charge Controller:** Implements the **CC/CV (Constant Current / Constant Voltage)** charging profile. * **Protection Circuitry:** * **Over-voltage protection:** Prevents the battery from exceeding 16.8V. * **Over-current protection:** Limits the charging current to prevent overheating. * **Short-circuit protection:** Shuts down the output if a short is detected. --- ### 3. Output Interfaces (DC Out) The BP2-R often doubles as a camera power supply (AC Adapter mode). * **4-Pin XLR Connector:** The standard output for professional video equipment. * **DC Regulator:** Ensures a stable 15V (approx.) output when used as a power supply, even if the AC input fluctuates. * **Priority Switch:** Most BP2-R units are programmed to prioritize DC Output over Charging; if a camera is plugged into the XLR, the charging stops to provide full power to the device. --- ### 4. User Interface & Monitoring | Part | Type | Purpose | | :--- | :--- | :--- | | **LED Indicators** | Bi-color/Tri-color LEDs | **Red:** Charging; **Green:** Fully Charged/Standby; **Orange:** Error/Fault. | | **Contact Pins** | V-Mount/Gold-Mount Terminals | High-current gold-plated pins for power transfer and data communication. | --- ### Technical Summary Table | Specification | Typical Value | | :--- | :--- | | **Input Voltage** | 100-240V AC, 50/60Hz | | **Charging Output** | 16.8V DC @ 2.0A - 3.0A | | **DC Adapter Output** | 15V DC @ 4.0A - 6.0A | | **Pin Configuration** | Pin 1 (-), Pin 4 (+) on XLR | ---