LED lighting power supply light pole factory foundation knowledge is introduced

What kind of LED light, lighting driver power supply are there? ( 1) Constant flow, constant current drive circuit of the output current is constant, and the output dc voltage is different with the size of the load resistance within a certain range, load resistance is small, low output voltage, load resistance

what kinds of led light, lighting drive power? ( 1) Constant current, constant current drive circuit of the output current is constant, the output DC voltage according to the size of the load resistance changes within a certain range. The smaller the load resistance, the lower the output voltage. The load resistance, the greater the output of the solar street lamp voltage is higher. Constant current circuit is not afraid of load short circuit, but it is forbidden to completely open load. Constant current drive circuit is the ideal choice of the drive leds, but the price is relatively high. Attention should be paid to the use of maximum current and voltage values, which limits the use of the number of led street light. ( 2) Voltage type: after the various parameters in regulating circuit, the output voltage constant, the output current changes along with the increase and decrease of load; Regulating circuit is not afraid of open load, but it is forbidden to short-circuit load completely. Light-emitting diodes (leds), powered by voltage driving circuit, each string of light emitting diode display brightness only in each string of increased when an appropriate resistance to average; The influence of brightness by the rectifier voltage change.