The **LEDD2M35** is a high-performance constant current LED driver module commonly used in industrial and professional lighting applications. It is designed to regulate the power supplied to LEDs to ensure consistent brightness and prevent damage from overcurrent. ### 1. Technical Specifications Below are the primary electrical characteristics of the LEDD2M35 driver: | Feature | Specification | | :--- | :--- | | **Output Current** | Constant 350mA (typical) | | **Input Voltage Range** | 9V - 32V DC | | **Output Power** | Up to 12W | | **Efficiency** | > 90% at full load | | **Dimming Method** | PWM (Pulse Width Modulation) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Key Electronic Components & Internal Architecture The module functions as a **Buck (Step-down) Converter**. Its performance relies on the following internal components: * **Integrated Switching Regulator:** A high-frequency IC that manages the conversion of input voltage to a stable constant current. * **Power Inductor:** Stores energy during the switching cycle to smooth out the current delivered to the LEDs. * **Schottky Diode:** Acts as a freewheeling diode to provide a path for the current when the internal switch is off. * **Sensing Resistor (R-Sense):** A low-tolerance resistor used to monitor the output current and provide feedback to the IC to maintain exactly 350mA. * **Filter Capacitors:** Low-ESR capacitors at the input and output to minimize voltage ripple and electromagnetic interference (EMI). --- ### 3. Connection and Pinout Configuration The LEDD2M35 typically features a simple 4 or 5-pin interface: 1. **Vin+**: Positive Input Power (9-32VDC). 2. **GND**: Common Ground. 3. **LED+**: Positive output to the LED anode. 4. **LED-**: Negative output to the LED cathode. 5. **PWM/DIM (Optional)**: Input for external dimming control (TTL compatible). --- ### 4. Critical Protection Features To ensure the longevity of the LEDs and the driver itself, the LEDD2M35 includes several safety mechanisms: * **Over-Temperature Shutdown:** Reduces output current if the module exceeds safe thermal limits. * **Short-Circuit Protection:** Prevents damage if the LED output leads are accidentally touched together. * **Open-Circuit Protection:** Ensures the output voltage does not spike to dangerous levels if no LED is connected. ---