With the continuous development of LED flexible light strips in recent years, it has become more and more popular among people, and its application range has become wider and wider. At the same time, the supply of conventional LED flexible light strips is no longer in demand. Home applications want to design a suitable LED flexible light bar, so; what are the remarks for the customization of LED flexible light bar?
First: the circuit design of the LED flexible light strip. The circuit of the LED flexible light bar includes a series circuit and a parallel circuit, as well as a series-parallel circuit.
The advantage of the series circuit is that the current is constant, and it is easier to control the driving current of the LED. The downside is that if one of the LEDs is damaged, all LEDs will be on, but it will not affect the life of the other LEDs.
The advantage of the parallel circuit is that any failure of one LED will not affect the use of other LEDs. The disadvantage is that if no current limiting resistor is added, any LED will be damaged, which will cause the current at both ends of other LEDs to increase, which will burn other LEDs. And because the driving voltage of a single LED is very low, most of the voltage will do useless work, which is also a waste of resources.
The series-parallel circuit is a common circuit for LED strips at present, because several LEDs are used in series to form a group, and then connected in parallel with other groups. It can maximize the utilization rate of the power supply voltage and reduce the useless power loss. At the same time, using several LEDs in series can ensure that the driving currents of these LEDs are consistent, which is conducive to constant LED currents to ensure the service life of the LEDs. The LED light groups connected in series are connected in parallel with other groups to ensure that if one group is damaged, it will not affect the normal use of other groups. At the same time, since each group has a current limiting resistor, the damage of one group will not affect the service life of other groups.
Second: the cutting position of the LED flexible light strip. In general, do one cut position per group. However, some customers will require a single LED to do a clipping position, which is also unreasonable. Because that is equivalent to a parallel circuit, there is no guarantee for the service life of the LED strip.
Third: the number of light beads per meter of the LED flexible light strip. Under normal circumstances, the number of light beads per meter of LED flexible light strips is fixed. For example, 1210 is 60 lights, 5050 is 30 lights, and special is 60 lights. If there are other special requirements, such as 50 lights per meter, this involves modifying the circuit. Because it is usually a group of 3 LEDs, if it is 50 lights, it will become a group of insufficient number, but if it becomes a group of two LEDs, the resistance of the current limiting resistor will be increased, which will cause a waste of resources. . Therefore, when making LED flexible light strips with special requirements, we must pay attention to the number of lamp beads that is a multiple of 3, so as not to cause waste of voltage resources.
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