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| LED lamp bead capacitor effect |
| Time:2022-10-09 00:00:00 | view： |
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Hello everyone, I am Xiaobian Rong, today, let ’s introduce the role of LED lamp bead capacitance effects of LED driving power capacitors. The following is the summary of Sister Rong’ s summary of this issue and related issues. Let ’s take a look. Catalog of the article:1. Broken LED lamp beads can be replaced with capacitors 2. What is the role of the resistance capacitance in the LED light driver 3. Can the LED light switch turn off and the capacitance will be slightly bright and the capacitance can be solved. Can it be solved? 4. Can the LED light string connectors reduce the current? 5. What is the function of the LED light only one capacitor LED lamp beads, can one use a capacitor? DC through communication. If the light bar or the light is damaged with a lamp bead, the damaged lamp beads can be temporarily linked. The purpose of being able to light up. However, this use will increase the voltage of other lamp beads, increase the current of each lamp bead, and reduce the service life of the entire lamp band. It is best to replace the damaged lamp beads directly. LED light driver what is the role of voltage resistance in the driver LED driving power supply capacitor generally appears in two places. One is the output of the 220V voltage after rectification, and the other is the output of the transformer transformer. The capacitors in these two places generally use electrolytic capacitors, and the main role is filtering.LED drive power supply function Whether 220V passes through the rectification or after the transformer output, the AC power is rectified, especially the high -frequency pulse flow after the transformer output is output. Therefore, the energy storage effect of the capacitor is required to filter it in order to make the pulsating DC electricity relatively smooth. LED lamp switch is turned off, can it be slightly bright and the capacitance can be solved. LED lamp switch is turned off, and the light will still emit a weak light. This is because the current LED lamp beads are generally high brightness. LED lamp beads have a high sensitivity. The current flowing through the lamp beads is more than ten μA, which will make the lamp bead bright. Generally, the LED lights appear slightly bright after the switch is disconnected. First, the LED lamp switch wiring is wrong, and the switch is connected to the zero line. If the switch of the LED lamp is turned off, the light is still slightly bright. At this time, you can measure the light switch with an electric pen. Broken, but the entire circuit of the LED light is still connected to the AC220V fire line. At this time, if the insulation resistance between the LED light and the wall is not very large, there will be a μA -level current flowing across LED lamp beads, which will make the lamp beads light brightly bright Essence If this situation causes the lights slightly, as long as the fire is connected to the switch. Another case of lighting after the switch is disconnected from the switch is caused by the leakage of the light switch. Like the LED lamp switch in the kitchen, due to the influence of the kitchen oil fume, some dirt may be deposited near the switch contacts, which reduces the insulation resistance of the switch, which causes a weak current to flow over the LED lamp beads after the switch is cut off to make it. Bright. If this is the case, replace the new switch.If the problem is still not solved through the above methods, there may be a problem with the design of the LED light circuit. At this time, the problem that can be solved by the method of parallel resistance at the output end of the LED lights With capacitors, there is no need to add capacitance). The parallel resistance can be selected from the resistance of 100 ～ 300kΩ. According to the circuit in Figure 1, it is connected to both ends of the capacitance C7. In this way, the weak current flowing through the beads will be by the resistance, and the lamp beads will not be slightly bright. The picture above is the constant current driver used for LED lights. The red and white lines on the right are the positive and negative output end of the driver. They are connected to the LED lamp beads. On the disk. LED light string Light -connected capacitance can reduce the currentThe resistance and LED series are to separate the pressure, otherwise the LED current will be damaged by the meeting. The function of the capacitor is to communicate. Later, the LED will shine, and the brightness is dark to the bright process. It takes a long time. If the capacitance is connected in parallel, because the voltage of the capacitor does not change, all the voltage is added to the LED. LED shines very high in a short period of time, and because the charging current of the capacitor is getting smaller and smaller, the work of LED is inherited from the resistance. The role is nothing more than providing part of the current when working in the triode. Charging at the deadline of the triode, on the other hand, it provides an initial incentive effect on the oscillation of the circuit when the oscillation starts, and improves the stability of the oscillation circuit during the circuit work. The basic role of capacitance is to store charge. For the intelligent charging circuit system, the capacitor establishes a feedback circuit, so the actual charge storage volume of the capacitor will automatically adjust the charging current. And the high and low charging current will determine the color of the LED indicator light display, red lights, red and green two colors, green lights above are the answers to the role of LED beads capacitance effects and related issues of LED driving power capacitance. I hope It is useful to you [Responsible editor: Sister Rong] |
