Most common constant voltage drivers (or Power Supplies) are 12VDC or 24VDC. What is a Constant Voltage LED Driver?Ĭonstant voltage drivers are designed for a single direct current (DC) output voltage. A constant current driver is the best way to drive high power LEDs as it maintains a consistent brightness across all LEDs in-series. Thermal Runaway refers to excess current beyond the LEDs maximum drive current which results in drastically lower LED life-spans and premature burn outs due to increased temperature. Higher current ratings do make the LED brighter, but if not regulated, the LED will draw more current than it is rated for. Mean Well’s AP Constant Current Driver is a good example shown below: These drivers vary the voltage along an electronic circuit which allows current to remain constant throughout the LED system. LEDs that are rated to operate on a constant current driver require a designated supply of current usually specified in milliamps (mA) or amps (A). Avoid serious damages to your LED investmentĬonstant current LED drivers are designed for a designated range of output voltages and a fixed output current (mA).Understanding the difference between the two types can: LED drivers are the driving force that provides and regulates the necessary power to make sure the LEDs operate in a safe and consistent manner. Constant Voltage LED DriversĬonstant current and Constant voltage drivers are both viable options for a power supply for LED light sources, what differs is the way in which they deliver the power. Now, it’s known that LED drivers are considered constant current devices, so why do manufacturers offer constant voltage drivers for LEDs as well? How can we tell the difference between these two? Constant Current LED Drivers vs. One important choice is that of choosing a constant current LED driver versus a constant voltage LED driver. There are plenty of factors to look at when choosing the one that works best for you, we have a thorough run-through of this in our guide on LED drivers here. ‘What type of LED driver do I need?’ Searching for LED drivers can be more difficult than you think with the variety of options out there.

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