What is constant current LED driver?

What is constant current LED driver?

What is a Constant Current LED Driver? Constant current LED drivers are designed for a designated range of output voltages and a fixed output current (mA). These drivers vary the voltage along an electronic circuit which allows current to remain constant throughout the LED system.

Are constant current LED drivers dimmable?

Although both constant-current and constant-voltage drivers can be made with a dimming feature, not all LEDs are dimmable — and the ones that are capable of dimming must be used with the proper dimming technology (e.g., PWM or CCR).

What is difference between constant current and constant voltage LED driver?

LED luminaires and their drivers may be either constant current or 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 voltage lights are ALWAYS wired in parallel.

Do LEDs need constant current or constant voltage?

LED luminaires and their drivers may be either constant current or constant voltage. Constant voltage luminaires require a steady voltage to be supplied from the driver eg 12 or 24 Volts. Constant current luminaires require a constant current to be supplied from the driver eg 350mA or 700mA (milli-amps).

Do LEDs need constant current?

LEDs are constant current devices with a forward voltage drop. This means the voltage supply must exceed that drop in order to allow current to flow, and by controlling the current, you control the intensity.

How do you select a constant current LED driver?

You can check the datasheet of your light source whether it needs constant current or constant voltage. If it says for example 350mA, then it needs constant current. 12V or 24V means that you need a constant voltage driver.

Can you connect LED drivers in series?

Series wiring is used most often with constant current drivers. When you wire in series, you add the forward voltages of each LED in the circuit but the current fed to each LED remains the same.

Can you wire LED lights in series?

The requirements of a lighting application often dictate what type of circuit can be used, but if given the choice, the most efficient way to run high power LEDs is using a series circuit with a constant current LED driver. Running a series circuit helps to provide the same amount of current to each LED.