COB LED constant current diode


Directly connected in series in the LED light string circuit, with low starting voltage and high withstand voltage. Adopting a very small size package with DFN1006 (0402) two pins, it can be directly replaced in the resistor mode. 0402 is used for COB light strips with no dimensional pressure, which does not affect the appearance and maintains constant current over long distances. Compatible with PWM dimming and two line dimming.


This type of constant current diode is mainly used in situations where the input voltage changes, maintaining a constant output current within a certain range of voltage fluctuations. The circuit has the characteristics of simplicity, economy, and reliability.


Good compatibility and consistency with PWM or DMA dimming modes, fast response speed without delay


Applied to COB light strips, easy to lay board without affecting appearance


Applied to RGB light strips, without affecting the luminous effect, achieving long-distance color temperature unchanged


Reference for the length of the light strip cascade:


※ 48Vdc input, cascaded for 50 meters without brightness difference, cascaded for a longer duration based on the VF value of the lamp beads and the thickness of the PCB copper foil.


※ 24Vdc input, cascading for 25 meters without brightness difference. Depending on the VF value of the lamp beads and the thickness of the PCB copper foil, the cascading is longer.