What caused the short circuit

The manufacturers of led light strips are distinguished by material, one is LED hard light strips, the other is soft LED light strips made of flexible materials. LED rigid light strips are assembled with PCB rigid boards. LEDs can be assembled by attaching LEDs by inserting LEDs. The advantages of LED rigid light bars are easier to fix, more convenient to process install, the disadvantage is that they cannot be bent at will. The LED flexible light strip uses FPC to assemble circuit boards, uses patch LEDs to assemble. The thickness of the product is only a coin thickness, does take up space, is easy to bend, suitable for various shapes.

     The disadvantage is that if no current limiting resistor is added, any LED will be damaged, which will cause the current across the other LEDs to increase burn out other LEDs. because the driving voltage of a single LED is very low, it will cause most of the voltage to do useless work, which is also a waste of resources. The series-parallel circuit is a common circuit for LED strips at present, because LED strip manufacturers use several LEDs to form a group together in series, then parallel with other groups.

Both methods coexist for a period of time. The multi-channel constant current output power supply method will be better in terms of cost function. Perhaps it is the direction of the main stream in the future. Consumers under 70 watts usually have no mandatory target. Although the lower power factor of a single power consumer has a smaller impact on the power grid, we turn on the lights at night the similar loads are too concentrated, which will cause severe pollution to the power grid. Regarding the LED driving power supply of 30 watts to 40 watts, I heard that in the near future, there may be a certain target demand for power factor.

     When a short-circuit situation occurs in a certain group of loops of a led strip manufacturer, the voltage of other LEDs in the same group will increase, the brightness of the LED will increase, the corresponding amount of heat will also increase. Obviously, in the wholesale of LED light strips, when any of the 5050 light strips has a short circuit in the chip circuit, the current of the shorted lamp doubles, that is, 20mA becomes 40mA, the brightness of the light bead It will become very bright, but at the same time the heat generation will also increase sharply, the circuit board will be burned in a few minutes.