Can the same LED light drive power supply be matched to different power LED lights at the same time

- Sep 20, 2018-

Can the same LED light drive power supply be matched to different power LED lights at the same time (for example, can a drive power supply be applied to 3W, 5W bulbs or other power lamps at the same time?)


The led power supply is mostly a constant current source, that is to say output current of the power supply is constant, and the voltage varies within a certain range. If you use a 3w power supply to drive a 5w lamp, the current will be constant at 3w of operating current, then the lamp will not reach normal brightness. If it is the reverse, it is possible to burn the lamp.

In general, the output parameter of the constant current source will mark the output current and output voltage range. You can multiply the output current by this range to get a power, observe whether the used lamp is within this power range, and then observe the lamp. The operating voltage is not within the output voltage range. If both values are present, the power supply can be used.

Extended data

The LED driving power supply is a power converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Generally, the input of the LED driving power source includes high-voltage power frequency alternating current (ie, commercial power), low-voltage direct current, high-voltage direct current, low voltage high. Frequency communication (such as the output of an electronic transformer).

The output of the LED driver is mostly a constant current source that changes the voltage as the LED's forward voltage drop changes.

Constant current type:

a, the current output of the constant current drive circuit is constant, and the output DC voltage varies within a certain range according to the magnitude of the load resistance. The load resistance is small, the output voltage is low, and the load resistance is larger. The higher the voltage;

b. The constant current circuit is not afraid of load short circuit, but it is forbidden to completely open the load.

c, constant current drive circuit to drive LED is more ideal, but relatively high price.

d. Pay attention to the maximum withstand current and voltage value used, which limits the number of LEDs used.