How to drive the LED voltage driver.full color led screen Processing

　　1. Low -voltage driver LED

　　Low -voltage driver refers to the use of voltage driving LEDs below the LED forward voltage drop. If a normal dry battery or nickel chromium/nickel -hydride battery is used to drive the LED, the normal power supply voltage is between 0.8 ～ 1.65V. When using a low voltage to drive the LED, you need to increase the voltage to the voltage value that is sufficient to make LEDs. For low -power lighting devices like LED, the low voltage driver method is a common usage, such as LED flashlight, LED emergency lights, , Energy -saving table lamp, etc. Due to the limitation of the capacity of the single -section, the low -voltage driver's power generally does not require high power, but it requires the lowest cost and relatively high transformation efficiency. Considering that sometimes it is necessary to cooperate with a battery No. 5, so it is necessary It has the smallest volume. The best technical solution is to choose a capacitive boost converter.

　　2. Transition voltage driver LED

　　The transition voltage driver means that the voltage value of the power supply to LED changes near the LED voltage drop. This voltage may sometimes be slightly higher than the voltage drop of LED, and sometimes it may be slightly lower than the voltage drop of LED. If the power supply consists of one lithium battery or two series of lead -acid batteries, the voltage is above 4V when the battery is fully charged, and the voltage of the battery is below 3V when the battery discharge is ended. The typical application is LED ore light.

　　The power transformation circuit of the transition voltage driver LED must not only solve the problem of voltage voltage, but also solve the problem of pressure reduction. In order to cooperate with a lithium battery work, it is also necessary to have as small as possible and as low as possible. Under normal circumstances, its power is not great, and the highest cost -effective circuit structure is inductive lift and antihypertensive converters.

　　3. High voltage driver LED

　　The high voltage driver means that the voltage value of the power supply supply to LED is always higher than the voltage drop of LED. The common power supply is 6V, 12V, and 24V batteries. Typical applications of this method such as solar lawn lights, solar courtyard lights, and motor vehicle lighting systems, etc. High -voltage driver LEDs need to solve the problem of lowering blood pressure. Because high voltage drivers are generally powered by ordinary batteries, they will use relatively large power, such as motor vehicle lighting and signal lighting, so it should be as low as possible. The optimal circuit structure of the converter is an inductive antihypertensive converter.

　　4. Municipal Driver LED

　　The use of municipal power -driven LED is the most practical way to drive, and it is also a problem that the application of LEDs in the field of lighting must be solved. In order to solve the problem of lowering blood pressure and rectification with the use of city -driven LEDs, there must be relatively high transformation efficiency, small volume and low cost, and should also solve the problem of safety isolation. Considering its impact on the power grid, it is also necessary to solve the problem of electromagnetic interference and power factor. For medium and small -power LEDs, its best circuit structure is a isolation mono -side reflux converter: For high -power applications, bridge transformation circuits should be used.

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