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What is a constant voltage driver?
Constant voltage drivers have a fixed voltage that is typically either 12VDC or 24VDC. They are used for LEDs that require one stable voltage and have a current that is already regulated either via simple resistors or an internal constant current driver located inside the LED module.
What is difference between constant-current and constant voltage?
Constant voltage luminaires require a steady voltage to be supplied from the driver eg 12 or 24 Volts. For these lights the voltage is fixed by the driver but the current may vary. Constant current luminaires require a constant current to be supplied from the driver eg 350mA or 700mA (milli-amps).
When do you use a constant voltage driver?
A parallel circuit where you’d use a constant voltage driver. When working with LEDs, it’s best to focus solely on getting the proper current to each LED. Think of forward voltage as a by-product of the current you supply. Why? Because current is what determines how bright an LED is.
What does constant current mean in a PWM?
Constant current means that you present the LED circuit with a variable voltage but limit the amount of amperage going to the LED. By varying this amount of current you can make the LED more dim or give more light. The LED circuit will automatically find the best voltage in the range combined with the given amperage to make it’s light.
Do you need a constant current LED driver?
Constant current LED drivers are designed for a designated range of output voltages and a fixed output current (mA). 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).
Which is better constant current or constant voltage for LEDs?
Constant 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. 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.