LED Driver Types — CV, CC & Programmable
The component that makes or breaks every LED installation.
The Two Families
Constant Voltage (CV) drivers output a fixed voltage (12V, 24V, 48V). Used for LED strips, modules, and signage. The LED load determines current draw. Constant Current (CC) drivers output a fixed current (350mA, 500mA, 700mA, 1050mA). Used for LED engines, COBs, and high-power fixtures.
Driver Selection Matrix
| led type | driver | voltage | notes |
|---|---|---|---|
| LED strip (12V/24V) | CV | 12V or 24V | Match voltage exactly |
| LED modules (signage) | CV | 12V or 24V | Check max modules per string |
| COB downlight | CC | Match current to COB spec | |
| High-power floodlight | CC | Higher current = brighter, more heat | |
| Linear LED engine | CC | Match engine spec sheet | |
| RGBW fixture | CV + DMX decoder | 24V | DMX decoder after CV driver |
Programmable Drivers
Modern programmable drivers can be configured via NFC or software to adjust output current, dimming curve, thermal protection, and emergency mode. DALI-2 programmable drivers store scenes and respond to sensor inputs directly. This reduces wiring and increases flexibility.
Efficiency & Power Factor
Quality drivers operate at 90–95% efficiency. Cheap drivers can be as low as 80% — that 10–15% difference is pure wasted heat. Power factor (PF) should be >0.9 for commercial projects. Low PF drivers draw more current than expected, overloading circuits.
