The core function of the LED constant current integrated driver board is to convert AC power into stable DC power, ensuring that the LED chips receive a constant current under various conditions, thereby guaranteeing stable lighting brightness and extending the life of the lamp.
1. Core Functions
• Constant Current Output: Regardless of input voltage fluctuations, the output current remains stable, preventing LEDs from burning out due to excessive current or dimming due to insufficient current.
• AC to DC Conversion: Converts AC 220V mains power to the low-voltage DC power (e.g., DC 12-48V) required by the LEDs.
• Circuit Protection: Integrates overvoltage, overcurrent, and short-circuit protection functions to prevent accidental damage.
• Dimming Support: Some models support PWM or analog dimming, adapting to intelligent control systems.
2. Technical Parameters
• Input Voltage: Typically AC 85-265V (wide voltage design)
• Output Current: Commonly 300mA, 600mA, 900mA, etc. (based on LED series/parallel configuration)
• Power Factor (PF): >0.9 (high-efficiency models can reach over 0.95)
• Conversion Efficiency: >85% (high-quality solutions can reach 92%)
• Operating Temperature: -30℃ to +60℃ (industrial standard)
3. Differences from Split Drivers
• Integrated design reduces external wiring, lowers the failure rate, and is more suitable for recessed lighting fixtures (such as downlights and panel lights).
• Split drivers are installed independently, making maintenance convenient but occupying more space; they are mostly used for high-power engineering lighting.
4. Selection Considerations
• The voltage and current requirements of the LED chips must be matched (e.g., 2835 chips commonly use 20mA/3V).
• For humid environments, waterproof potting compound models (IP67 rating) must be selected. • For demanding applications, isolated power supply solutions are preferred due to their higher safety margin.
5. Safety Warnings Non-professionals should not attempt to disassemble or modify the driver board, as the high-voltage circuitry poses a risk of electric shock. When modifying lighting fixtures, ensure that electrical parameters are compatible; otherwise, it may result in damage to the fixtures or a fire.
