The operating environment temperature of the capacitor in harsh environments will be greater than 95°C. It has also been proposed whether ceramic or solid capacitors can be used, but the current capacitor technology can not be made into high voltage and large capacity. Of course, a good saddle needs to be equipped with a good horse. Using a long-life capacitor does not necessarily ensure the life of the power supply. To improve the life of the power supply, you need to improve in many ways: use a capacitor with a higher lifetime, improve the efficiency of the power supply, and make the power supply The thermal design optimizes the thermal design of the lamp. Many lighting companies in order to consider the compactness of the lighting design in order to reduce the weight, the size of the power supply is required to be compact and installed in a confined space, and the power dissipation conditions of the power supply are limited. Therefore, high efficiency, small size, and better heat dissipation design are challenges faced by LED power supplies.
In addition to part of the power conversion to light energy, most of the power is converted into infrared radiation energy to radiate outside the lamp, while the LED lamps are different. LED is a semiconductor light emitting, in which most of the power is converted into heat energy except that part of the power is converted into light energy, and these heat can only be dissipated by the lamp body that is tightly integrated with the chip.
Businesses in order to lamp the overall structure of the product is beautiful, often the LED power supply and LED lamp body structure are closely designed together, LED heating and power supply heating superposition, so that the power supply and LED light source are in a harsh working environment, when the working environment When the temperature exceeds a certain temperature, the life of LED power supplies and LEDs is greatly reduced. When the internal power supply is set to temperature protection, the phenomenon of repeatedly turning on/off the light will occur. If the temperature protection is not set, it will cause high temperature damage to the power supply device and accelerate the light decay of the LED.
The LED power supply belongs to the switching power supply. The quality and reliability of the switching power supply depend on its circuit design, production process, and the quality of the device. Electrolytic capacitors are an integral part of high-power switching power supplies.
The normal operating life of the switching power supply depends on the lifetime of the electrolytic capacitor used by the power supply. The life of the electrolytic capacitor depends on the life of the capacitor itself and the operating temperature.
The working life of electrolytic capacitors varies greatly at different temperatures.
Take a well-known foreign brand electrolytic capacitors as an example:
Its universal -40 °C - +105 °C specifications capacitor life guarantee value (at 105 °C full load conditions) 4000 hours. If we design the capacitor ripple current load value to 85% at maximum, then: According to its provided life estimation formula
The lifetime of the capacitor temperature of 65°C can only guarantee about 80,000 hours;
The lifetime of the capacitor temperature of 75 °C can only guarantee about 40,000 hours;
The lifetime of the capacitor temperature of 85°C can only guarantee about 20,000 hours;
The lifetime of the capacitor temperature of 95°C can only guarantee about 10,000 hours;
From the above calculations, the life of the electrolytic capacitor will be reduced by half every 10°C.
Lamp working environment temperature: In some areas summer outdoor nighttime surface temperature is as high as 40°C, even higher.
Temperature rise of the lamp itself: Since a large amount of heat generated by the LED itself depends on the housing to dissipate heat, the temperature of the LED lamp housing is reasonably designed to be between about 20°C and 25°C.
That is: Under the working conditions of room temperature 25 °C, the lamp housing temperature is about 45 °C -50 °C or so.
Power supply temperature rise: Power supply design better power device temperature rise in the 25-30 °C, the design of the relatively poor temperature rise is greater than 35 °C, outdoor LED power supply requires waterproof, need to use a sealed shell, in order to protect the level of To increase the manufacturer's requirements for rubber processing, the price of different colloidal materials is not the same, the thermal conductivity is not the same, cheap rubber has poor thermal conductivity, and requires high-temperature baking, often resulting in varying degrees of invisible damage and tight beam strains. Leave hidden dangers. (The poor heat treatment process makes the working environment of the electrolytic capacitor inside the shell be like a thermos bottle, and the temperature accumulation cannot be released).
1 This article was contributed by adansj
Life of LED drive power
The operating environment temperature of the capacitor in harsh environments will be greater than 95°C. It has also been proposed whether ceramic or solid capacitors can be used, but the current capacitor technology can not be made into high voltage and large capacity. Of course, a good saddle needs to be equipped with a good horse. Using a long-life capacitor does not necessarily ensure the life of the power supply. To improve the life of the power supply, you need to improve in many ways: use a capacitor with a higher lifetime, improve the efficiency of the power supply, and make the power supply The thermal design optimizes the thermal design of the lamp. Many lighting companies in order to consider the compactness of the lighting design in order to reduce the weight, the size of the power supply is required to be compact and installed in a confined space, and the power dissipation conditions of the power supply are limited. Therefore, high efficiency, small size, and better heat dissipation design are challenges faced by LED power supplies.
In addition to part of the power conversion to light energy, most of the power is converted into infrared radiation energy to radiate outside the lamp, while the LED lamps are different. LED is a semiconductor light emitting, in which most of the power is converted into heat energy except that part of the power is converted into light energy, and these heat can only be dissipated by the lamp body that is tightly integrated with the chip.
Businesses in order to lamp the overall structure of the product is beautiful, often the LED power supply and LED lamp body structure are closely designed together, LED heating and power supply heating superposition, so that the power supply and LED light source are in a harsh working environment, when the working environment When the temperature exceeds a certain temperature, the life of LED power supplies and LEDs is greatly reduced. When the internal power supply is set to temperature protection, the phenomenon of repeatedly turning on/off the light will occur. If the temperature protection is not set, it will cause high temperature damage to the power supply device and accelerate the light decay of the LED.
The LED power supply belongs to the switching power supply. The quality and reliability of the switching power supply depend on its circuit design, production process, and the quality of the device. Electrolytic capacitors are an integral part of high-power switching power supplies.
The normal operating life of the switching power supply depends on the lifetime of the electrolytic capacitor used by the power supply. The life of the electrolytic capacitor depends on the life of the capacitor itself and the operating temperature.
The working life of electrolytic capacitors varies greatly at different temperatures.
Take a well-known foreign brand electrolytic capacitors as an example:
Its universal -40 °C - +105 °C specifications capacitor life guarantee value (at 105 °C full load conditions) 4000 hours. If we design the capacitor ripple current load value to 85% at maximum, then: According to its provided life estimation formula
The lifetime of the capacitor temperature of 65°C can only guarantee about 80,000 hours;
The lifetime of the capacitor temperature of 75 °C can only guarantee about 40,000 hours;
The lifetime of the capacitor temperature of 85°C can only guarantee about 20,000 hours;
The lifetime of the capacitor temperature of 95°C can only guarantee about 10,000 hours;
From the above calculations, the life of the electrolytic capacitor will be reduced by half every 10°C.
Lamp working environment temperature: In some areas summer outdoor nighttime surface temperature is as high as 40°C, even higher.
Temperature rise of the lamp itself: Since a large amount of heat generated by the LED itself depends on the housing to dissipate heat, the temperature of the LED lamp housing is reasonably designed to be between about 20°C and 25°C.
That is: Under the working conditions of room temperature 25 °C, the lamp housing temperature is about 45 °C -50 °C or so.
Power supply temperature rise: Power supply design better power device temperature rise in the 25-30 °C, the design of the relatively poor temperature rise is greater than 35 °C, outdoor LED power supply requires waterproof, need to use a sealed shell, in order to protect the level of To increase the manufacturer's requirements for rubber processing, the price of different colloidal materials is not the same, the thermal conductivity is not the same, cheap rubber has poor thermal conductivity, and requires high-temperature baking, often resulting in varying degrees of invisible damage and tight beam strains. Leave hidden dangers. (The poor heat treatment process makes the working environment of the electrolytic capacitor inside the shell be like a thermos bottle, and the temperature accumulation cannot be released).
In addition to part of the power conversion to light energy, most of the power is converted into infrared radiation energy to radiate outside the lamp, while the LED lamps are different. LED is a semiconductor light emitting, in which most of the power is converted into heat energy except that part of the power is converted into light energy, and these heat can only be dissipated by the lamp body that is tightly integrated with the chip.
Businesses in order to lamp the overall structure of the product is beautiful, often the LED power supply and LED lamp body structure are closely designed together, LED heating and power supply heating superposition, so that the power supply and LED light source are in a harsh working environment, when the working environment When the temperature exceeds a certain temperature, the life of LED power supplies and LEDs is greatly reduced. When the internal power supply is set to temperature protection, the phenomenon of repeatedly turning on/off the light will occur. If the temperature protection is not set, it will cause high temperature damage to the power supply device and accelerate the light decay of the LED.
The LED power supply belongs to the switching power supply. The quality and reliability of the switching power supply depend on its circuit design, production process, and the quality of the device. Electrolytic capacitors are an integral part of high-power switching power supplies.
The normal operating life of the switching power supply depends on the lifetime of the electrolytic capacitor used by the power supply. The life of the electrolytic capacitor depends on the life of the capacitor itself and the operating temperature.
The working life of electrolytic capacitors varies greatly at different temperatures.
Take a well-known foreign brand electrolytic capacitors as an example:
Its universal -40 °C - +105 °C specifications capacitor life guarantee value (at 105 °C full load conditions) 4000 hours. If we design the capacitor ripple current load value to 85% at maximum, then: According to its provided life estimation formula
The lifetime of the capacitor temperature of 65°C can only guarantee about 80,000 hours;
The lifetime of the capacitor temperature of 75 °C can only guarantee about 40,000 hours;
The lifetime of the capacitor temperature of 85°C can only guarantee about 20,000 hours;
The lifetime of the capacitor temperature of 95°C can only guarantee about 10,000 hours;
From the above calculations, the life of the electrolytic capacitor will be reduced by half every 10°C.
Lamp working environment temperature: In some areas summer outdoor nighttime surface temperature is as high as 40°C, even higher.
Temperature rise of the lamp itself: Since a large amount of heat generated by the LED itself depends on the housing to dissipate heat, the temperature of the LED lamp housing is reasonably designed to be between about 20°C and 25°C.
That is: Under the working conditions of room temperature 25 °C, the lamp housing temperature is about 45 °C -50 °C or so.
Power supply temperature rise: Power supply design better power device temperature rise in the 25-30 °C, the design of the relatively poor temperature rise is greater than 35 °C, outdoor LED power supply requires waterproof, need to use a sealed shell, in order to protect the level of To increase the manufacturer's requirements for rubber processing, the price of different colloidal materials is not the same, the thermal conductivity is not the same, cheap rubber has poor thermal conductivity, and requires high-temperature baking, often resulting in varying degrees of invisible damage and tight beam strains. Leave hidden dangers. (The poor heat treatment process makes the working environment of the electrolytic capacitor inside the shell be like a thermos bottle, and the temperature accumulation cannot be released).
1 This article was contributed by adansj
Life of LED drive power
The operating environment temperature of the capacitor in harsh environments will be greater than 95°C. It has also been proposed whether ceramic or solid capacitors can be used, but the current capacitor technology can not be made into high voltage and large capacity. Of course, a good saddle needs to be equipped with a good horse. Using a long-life capacitor does not necessarily ensure the life of the power supply. To improve the life of the power supply, you need to improve in many ways: use a capacitor with a higher lifetime, improve the efficiency of the power supply, and make the power supply The thermal design optimizes the thermal design of the lamp. Many lighting companies in order to consider the compactness of the lighting design in order to reduce the weight, the size of the power supply is required to be compact and installed in a confined space, and the power dissipation conditions of the power supply are limited. Therefore, high efficiency, small size, and better heat dissipation design are challenges faced by LED power supplies.
In addition to part of the power conversion to light energy, most of the power is converted into infrared radiation energy to radiate outside the lamp, while the LED lamps are different. LED is a semiconductor light emitting, in which most of the power is converted into heat energy except that part of the power is converted into light energy, and these heat can only be dissipated by the lamp body that is tightly integrated with the chip.
Businesses in order to lamp the overall structure of the product is beautiful, often the LED power supply and LED lamp body structure are closely designed together, LED heating and power supply heating superposition, so that the power supply and LED light source are in a harsh working environment, when the working environment When the temperature exceeds a certain temperature, the life of LED power supplies and LEDs is greatly reduced. When the internal power supply is set to temperature protection, the phenomenon of repeatedly turning on/off the light will occur. If the temperature protection is not set, it will cause high temperature damage to the power supply device and accelerate the light decay of the LED.
The LED power supply belongs to the switching power supply. The quality and reliability of the switching power supply depend on its circuit design, production process, and the quality of the device. Electrolytic capacitors are an integral part of high-power switching power supplies.
The normal operating life of the switching power supply depends on the lifetime of the electrolytic capacitor used by the power supply. The life of the electrolytic capacitor depends on the life of the capacitor itself and the operating temperature.
The working life of electrolytic capacitors varies greatly at different temperatures.
Take a well-known foreign brand electrolytic capacitors as an example:
Its universal -40 °C - +105 °C specifications capacitor life guarantee value (at 105 °C full load conditions) 4000 hours. If we design the capacitor ripple current load value to 85% at maximum, then: According to its provided life estimation formula
The lifetime of the capacitor temperature of 65°C can only guarantee about 80,000 hours;
The lifetime of the capacitor temperature of 75 °C can only guarantee about 40,000 hours;
The lifetime of the capacitor temperature of 85°C can only guarantee about 20,000 hours;
The lifetime of the capacitor temperature of 95°C can only guarantee about 10,000 hours;
From the above calculations, the life of the electrolytic capacitor will be reduced by half every 10°C.
Lamp working environment temperature: In some areas summer outdoor nighttime surface temperature is as high as 40°C, even higher.
Temperature rise of the lamp itself: Since a large amount of heat generated by the LED itself depends on the housing to dissipate heat, the temperature of the LED lamp housing is reasonably designed to be between about 20°C and 25°C.
That is: Under the working conditions of room temperature 25 °C, the lamp housing temperature is about 45 °C -50 °C or so.
Power supply temperature rise: Power supply design better power device temperature rise in the 25-30 °C, the design of the relatively poor temperature rise is greater than 35 °C, outdoor LED power supply requires waterproof, need to use a sealed shell, in order to protect the level of To increase the manufacturer's requirements for rubber processing, the price of different colloidal materials is not the same, the thermal conductivity is not the same, cheap rubber has poor thermal conductivity, and requires high-temperature baking, often resulting in varying degrees of invisible damage and tight beam strains. Leave hidden dangers. (The poor heat treatment process makes the working environment of the electrolytic capacitor inside the shell be like a thermos bottle, and the temperature accumulation cannot be released).
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