Different switching power supply parameters are not the same, but most of the constant voltage of the switching power supply has a power matching function (with bleeder resistors), will be based on your load to adjust the current, which is in his case to ensure that the voltage supply on the move, power is automatically adjusted according to the load current to output the required power, so you can go to test and check that the power supply .to validate if the power supply is appropriate for led strip. And verification method is also very simple. Common chips of led strip are the following: 3020,3528,5050 and so on, the common 3528 lamp beads per meter 30 beads, 60 beads, 90 beads, 120 beads; 5050 lamp beads 30 beads, 60 beads, 72 beads;
but the most common way is 3 serial links and, according to the circuit connection mode can be calculated easily out of current, such as 3528 of the 60 bead light strip, is also 3 string and 20 parallel, according to each 20MA current, this current is 20 * 20=400MA, at this point, you can use the multimeter to measure current, see whether can meet the requirements, if conditions permit, you can the stability coefficient test power supply current, drive more stable is also more suitable for the LED lamp strip (because LED lamp beads are demanding constant current when LED lamp just work)!