LED drive electrolytic capacitor status and future development direction

Enhance competitiveness with quality and technological innovation

The most important thing for LED products is consumers. The core demand of consumers is 'energy saving and money saving', and long life is the basis for cost saving and the direct demand of customers for product development. Therefore, the life of a capacitor as a core component of an LED lamp must be longer and longer.

The life of the whole LED lamp is affected by the combination of light decay, heat, power supply, capacitors, etc., while Emerald Electronics focuses on improving from the improvement of capacitors. Solid electrolytic capacitors have exceeded 30,000 hours at 105 ° C, at 85 ° C. In the case of 300,000 hours, Emerald Electronics has prepared a capacitor solution in this field to meet the development needs of the LED industry. Liquid capacitors have inherent defects, and the temperature range is not wide enough. When the temperature is extremely low or extremely high, the life is not guaranteed, and the performance of the capacitor is also affected in harsh environments, such as when the temperature exceeds 125 °C. It will be shortened rapidly. Under the extremely low temperature of minus 40 °C, the activity of the liquid capacitor will be weak, and the performance of the electrical device on the circuit will be weakened. However, the cost is relatively low and it is suitable for indoor lighting.

At present, electrolytic capacitors will not become short plates of LED lamps in terms of life and temperature, because nowadays it is no longer the era of liquid electrolytic capacitors. Outdoor lighting has both life expectancy and ambient temperature requirements, so new Technology, new products to solve some problems that cannot be solved at present. Due to the material inside, the solid capacitor is an occasional high-molecular polymer, which can greatly improve the temperature range. For example, Zhaoqing Emerald Electronics has recently designed and introduced high-voltage solid-state capacitors between -55° and 100°. Working very normally to meet the needs of the harsh environment of outdoor lighting.

Some new solutions have also solved the problem of short life boards, such as hundreds of street lights on a section of road. The customer divides the control power into two sections, one section is the communication part, and several hundred street lamps are concentrated under the lamp post of the AC power supply; In the part where the lamp head emits light, the direct current is reserved. The solution for retaining the direct current separates the high voltage, and the solid capacitor solution is placed in the part of the direct current output, which solves the problem of the short circuit of the liquid capacitor, and remains safe for several years.