What is a Constant Current Driver?

A Constant Current Driver is an electronic circuit or device designed to supply a steady current regardless of fluctuations in the voltage across the load. It is commonly used for devices such as LEDs and laser diodes, which require a specific current to operate correctly. If the current deviates from the specified value, the performance of these devices can be impaired, or they can be damaged due to overheating or shortened lifespan. For example, an LED light will suffer from reduced brightness or a shorter lifespan if not driven with the appropriate current. Therefore, a constant current driver is essential for LEDs and laser modules. The driver adjusts the output voltage to maintain a constant current, ensuring stable power delivery and the longevity of the device.

Many constant current drivers also come with overcurrent protection and thermal protection features to enhance safety. They are an important component used in various applications.

※Includes information on some trading companies