The led controller is actually the switch that controls each position of the led product. There are many problems that the led controller is prone to. The composition of the led controller has two key parts, one is the signal control board, and the other is the power output board. These two core parts are also key items for the detection of led controllers. The key components of the led controller must not have quality problems. If the key components fail, the entire led controller will not be able to operate. The LED controller must be tested for these Damage to key structures.
It is very tricky for the lED controller to detect a single LED with degraded performance or short circuit in the light string in the controller, because the forward voltage will vary greatly within the entire load, temperature and manufacturing tolerance range. . One way to eliminate such changes is to use two matched light strings in parallel, so that any relative deviation of the forward voltage between the two light strings can indicate the occurrence of some kind of failure. In this type of solution, the string of lights was originally made using selected components, and the purpose of the selection was to match the total forward voltage drop.
One potential problem with driving two parallel light strings from a single output is that if one of the light strings becomes open or non-conducting, twice as much current may flow through the other light string. The dual current regulation loop in the LT3796-1 can be used to avoid this current disturbance.