LED strip constant current diode


The CN40XXE series constant current tube has the function of preventing high-voltage surge impact, with an anti-static ability of up to 8KV, and can be applied in high demand situations. It can be directly connected in series to LED light string circuits, with low starting voltage and high voltage resistance. Adopting SOD-123 packaging, it can be directly replaced in resistor mode. Long distance constant current. 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 LED light strips, easy layout 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.