Why can't led light power supply be replaced by switching power supply

Because it will burn out.

led lamp power supply can not be replaced by a switching power supply, because any circuit needs to have a reaction time, and the circuit of the working device is the semiconductor in the PN junction in the power supply to give a sampling signal before reacting to the PN junction of the LED directly began to work, so it is "reacting" faster than the circuit of "many PN junctions with" will burn out early. So it "reacts" faster than the "many PN junctions in the circuit" and burns out earlier.

Expanded information:

Special features of the LED power supply:

1, the voltage output is a multiple of 3.2, that is to say, the voltage output in the form of 3.2V

1, the voltage output is a multiple of 3.2, that is to say, the voltage output in the form of 3.2V, 6.4V, 9.6V, 12.8V, etc., but the most generally do not exceed 25.6V, because more than this number, when turning on the LEDs, the product will be due to the consistency of the product is not good, and the possibility of instantaneous burning off of the last conduction of the one LED. And this voltage is not constant, but varies with the load to achieve the purpose of constant current.

2, the output current is constant, the ideal circuit is no matter how the characteristic curve of the LED how to change, drive the power supply current remains unchanged, but limited to component precision, there will be a small amount of change, and this change is also an important parameter to determine whether the driver circuit is excellent, the LED's conduction and the voltage of the function is a nonlinear "three-section The function of LED conduction and voltage is a non-linear "three-stage" relationship, so it is very important to maintain a constant current.

3, start is a soft start, due to the consistency of the LED is very poor, and in the on-time activity of the internal PN junction instantaneous change, so the LED driver is generally designed for soft start, to avoid this defect.

4, the circuit requires the simplest, because many times the circuit is required to be installed in a very small space to match the convenience of LED lighting, so the circuit should be as simple as possible, which also saves costs and reduces energy consumption.