The voltage drop of the LED lamp strip, as the name suggests, refers to the phenomenon of reduced brightness due to the reduction of voltage in the LED lamp strip. This phenomenon mainly appears in the low-voltage LED light belt, such as the 12V light belt. When the lamp belt exceeds a certain length, such as more than 5 meters, there will be an obvious pressure drop 9 problem. The "voltage drop" here refers to a drop in voltage, and a drop in voltage leads to an increase in current because voltage and current are related in the circuit. However, since the PCB board of the LED strip is bar-shaped, the current and voltage will gradually decrease in the latter half of the strip. This is mainly because when the current is too large, the current resistance voltage 9 of the PCB board will increase, resulting in an increase in voltage drop.

This phenomenon is not obvious in high voltage LED strips, because the high voltage strip is high and the current is relatively low, so the voltage drop problem is small. But in the low-voltage LED strip, this phenomenon is more prominent. When the LED strip is too long, the electrode voltage decreases, resulting in another wire needing to be placed next to the strip to direct the power supply directly to the center of the strip. Also, to reduce the effect of the voltage drop, consider placing the power supply in the center of the entire length of the lamp strip to power both ends.

For consumers, the most direct manifestation of the voltage drop phenomenon 9 is to find that the brightness of the LED light strip is brighter near the power supply end, and gradually dimmed away from the power supply end. This is because with the increase of distance, the voltage and current are reduced, resulting in a decrease in brightness. This phenomenon of uneven brightness will affect the visual effect in many occasions, so it needs to be paid enough attention to.

In order to solve the pressure drop problem, in addition to the above several methods, you can also consider using a drive with constant current function to supply power. Constant current driver 9 can keep the current constant throughout the voltage range, so that even if the voltage fluctuates, the current will not change, thus ensuring the brightness consistency of the LED lamp strip

In addition, in order to more accurately understand the pressure drop of the LED lamp belt, you can buy a special measuring equipm9 for testing. These devices can measure and perform.

By measuring the voltage and current values at different positions 9 to calculate the actual brightness value, in order to more comprehensively evaluate the quality of the LED lamp strip