0-10V Dimming is a popular analog control method used in LED power supplies. It employs a separate low-voltage (0–10 V DC) control signal transmitted over an additional pair of wires to precisely regulate LED brightness. The driver interprets the voltage level: 0 V typically equals minimum brightness or off (0%), while 10 V corresponds to full output (100%). Intermediate voltages produce linear, proportional dimming.
The driver internally converts the analog 0–10 V signal into either PWM (pulse-width modulation) or constant-current reduction, ensuring smooth, flicker-free light output across the entire range - often down to 1–10% without visible steps or color shift. Unlike TRIAC phase-cut dimming, it does not modify the AC mains waveform, resulting in lower EMI and better compatibility with sensitive environments.
This method is widely adopted in commercial, industrial, and architectural applications such as offices, hospitals, schools, conference rooms, and large-scale lighting systems where integration with building automation systems (BAS), daylight sensors, or centralized controllers is required. It offers excellent linearity and repeatability but requires extra control wiring during installation, making it less suitable for simple residential retrofits.
Modern 0-10V LED drivers frequently support sink or source configurations and can be combined with other protocols (DALI, DMX) for hybrid control. They deliver high efficiency (>85%) and full protection features while providing professional-grade dimming performance.
