Drive power supply manufacturer tells the difference between LED switch control power supply and drive system power supply
These functions include:

Its output operating voltage is 3.2V, that is, the output voltage is 3.2V, 6.4V, 9.6V, 12.8V, but cannot exceed 25.6V. If this number is exceeded, when the LED is turned on, there is a possibility that a conductive tube will burn out instantly due to poor product consistency. And this voltage is not constant, but changes with the change of load in order to achieve the goal of constant current.
 

Its output current is constant, and the ideal circuit is constant regardless of the LED characteristic curve and how it develops and changes. However, due to the limitation of component precision, there will be small changes, and this change is also an important parameter for judging the performance of the driver circuit. The conduction of the LED is nonlinear "three-level" with the voltage, so it is very important to maintain a constant current. Important. It starts with soft start. Since the light emitting diode has poor uniformity and the activity of the pn junction changes instantaneously when turned on, the light emitting diode is usually driven with soft start to avoid this disadvantage.

The circuit requirements are extremely simple, because in many different cases, the required circuit is installed in a very small space in the design to match the convenience of LED lighting, so our circuit should be as simple as possible, which can also save time and cost and reduce energy consumption.