What is LED driver?
Generally speaking, LED driver is a converter. Its function is to transform our commonly used utility or other power supply into LED suitable for the use of voltage and current. Through its conversion led to work properly light. As if we want to unscrew a nut, we must use the same type of spanner.
The function of the LED driver and the past we have used the quartz lamp transformer, fluorescent lamps, energy-saving lamps, metal halide lamp ballasts and no difference. All in order to make the light source products can be stable and normal work. So it is often called led ballast, led transformer, but led practitioners are generally still called driver, one is in order to distinguish from other converters, because the working principle of the three are different. Three can show us professional chant. So down, we are to led driver to express.
Types of LED driver
Market commonly used led light driver according to the drive mode is divided into two kinds, one is constant current drive, constant current drive is characterised by the output current is constant, the output voltage in a range of changes. So we often see on the market to drive the shell is marked (output: DC**V--**V ***mA+-5% ) This means that the output voltage in a certain range, the current is how many milliamps.
The other type is constant voltage drive. The characteristics of constant voltage drive is that the output voltage is fixed, and the current varies with the number of connected lamps within the maximum value. Generally marked on the shell (output: DC**V **A) refers to the output of a fixed number of volts of voltage, the maximum output current is how much. led market is common to output 5V, 12V, 24V and so on.
Application of LED driver
The application of the LED driver depends on the parameters of the led we want to drive. The two most important parameters are input voltage and input current.
After knowing the input voltage and input current of the lamp board, we choose the corresponding led driver can be used. For example, the following situation. Knowing that the input voltage of the lamp board is 37-40V, the input current is 300mA, then you can choose the LED driver output voltage contains it, the current is almost the same. Matching, the voltage is higher or lower than can not be, must be included. Otherwise there will be flickering.
Finally, we just need to solder the driver or connecting wires according to the positive and negative terminals of the light board.