The LED driver is the power supply circuit involved and the efficiency of the power supply itself. The efficiency of the power supply itself is not high enough to reflect the energy saving effect. Improving the driving efficiency is also the key to fully embody the superiority of semiconductor lighting. At the same time, when LEDs are used in large-scale applications, the reliability of LED products is often affected by problems such as mismatched power supply life and insufficient reliability. To fully exploit the potential of LED lights, lighting drive power is one of the key supporting factors.
In order to meet different input voltages, input currents and different LED quantities, various semiconductor device companies have developed various new white LED drivers. In addition to driving white LEDs, drivers can also drive blue LEDs or other color LEDs. In addition, the driver has a stable output or a programmable output, so the driver can be used as a regulated power supply or a programmable constant current source.
The driver must be compatible with the LED light to ensure that it is working properly. For example, LED as a load of a driving circuit often requires dozens or even hundreds of combinations to form a light-emitting component. What kind of LED driver is used, and what kind of connection mode the LED uses as a load is directly related to its reliability and life. .
The driver provides a forward voltage to the LED to allow current to flow. The level of illumination or brightness of an LED is usually proportional to the magnitude of the forward current. In addition, the current through the LED should not exceed the rated current specified by the device, otherwise it may cause permanent damage. Thus, a constant current drive circuit is the ideal solution to control the current at the correct level of driving the LED. In other words, the LED drive circuit is a power conversion circuit that provides a constant current instead of a constant voltage.
The luminous intensity of a high-power LED lamp is determined by the current flowing through the LED. The current will cause the LED to attenuate. If the current is too weak, it will affect the luminous intensity of the LED. Therefore, the LED driver needs to provide a constant current power supply to ensure high-power LED. The security of use also needs to meet the expected brightness requirements and ensure the consistency of brightness and chromaticity of each LED. Therefore, traditionally used to drive light bulbs (tungsten wire), fluorescent lamps, energy-saving lamps, sodium lamps and other light sources is not suitable for direct driving of high-power LEDs. LED lamps used to drive high power also need to address buck, isolation, PFC (power factor correction) and constant current problems, as well as higher conversion efficiency.
The LED chip technology has been relatively mature. The average life expectancy under the correct use conditions has exceeded 100,000 hours. The average life of the driving power supply in the LED lamp components is the shortest. The average life of the conventional high-power drive power supply is generally less than 30,000 hours. The life of a luminaire is largely determined by the driving power supply. The life of the driving power supply is limited by the electrolytic capacitor. The electrolytic capacitor is the key component of the power supply.
In order to meet different input voltages, input currents and different LED quantities, various semiconductor device companies have developed various new white LED drivers. In addition to driving white LEDs, drivers can also drive blue LEDs or other color LEDs. In addition, the driver has a stable output or a programmable output, so the driver can be used as a regulated power supply or a programmable constant current source.
The driver must be compatible with the LED light to ensure that it is working properly. For example, LED as a load of a driving circuit often requires dozens or even hundreds of combinations to form a light-emitting component. What kind of LED driver is used, and what kind of connection mode the LED uses as a load is directly related to its reliability and life. .
The driver provides a forward voltage to the LED to allow current to flow. The level of illumination or brightness of an LED is usually proportional to the magnitude of the forward current. In addition, the current through the LED should not exceed the rated current specified by the device, otherwise it may cause permanent damage. Thus, a constant current drive circuit is the ideal solution to control the current at the correct level of driving the LED. In other words, the LED drive circuit is a power conversion circuit that provides a constant current instead of a constant voltage.
The luminous intensity of a high-power LED lamp is determined by the current flowing through the LED. The current will cause the LED to attenuate. If the current is too weak, it will affect the luminous intensity of the LED. Therefore, the LED driver needs to provide a constant current power supply to ensure high-power LED. The security of use also needs to meet the expected brightness requirements and ensure the consistency of brightness and chromaticity of each LED. Therefore, traditionally used to drive light bulbs (tungsten wire), fluorescent lamps, energy-saving lamps, sodium lamps and other light sources is not suitable for direct driving of high-power LEDs. LED lamps used to drive high power also need to address buck, isolation, PFC (power factor correction) and constant current problems, as well as higher conversion efficiency.
The LED chip technology has been relatively mature. The average life expectancy under the correct use conditions has exceeded 100,000 hours. The average life of the driving power supply in the LED lamp components is the shortest. The average life of the conventional high-power drive power supply is generally less than 30,000 hours. The life of a luminaire is largely determined by the driving power supply. The life of the driving power supply is limited by the electrolytic capacitor. The electrolytic capacitor is the key component of the power supply.
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