Is the LED belt with a constant voltage transformer or a constant current transformer?
LED lights with all kinds of varieties, with high and medium pressure, low voltage, AC and DC, lamp with internal general only by the current limiting resistor to protect the LED chip, is not reliable, of course, preferably with constant current drive lights, but seldom have this right drive, generally uses the switching power supply has regulated performance they are very sensitive to the change of the LED drive, the power supply voltage, the voltage variation of the weak will bring great changes in current, exceed the rated current of LED is very easy to damage. So the requirements of power supply better performance (in order to avoid the current instability), a better solution is to lower the power supply output voltage, the LED voltage derating, even if the impact is not accidental, overcurrent, caused damage to the LED, such as the low voltage of 12V can be adjusted to use low 11.5V. This will extend the service life.
Specific to the chip requirements, usually constant flow. This suggests looking for professional manufacturers to give advice, we use LED lamp is driving Foshan won, the price is also possible.
Constant current transformers are generally current transformers. The principle of current transformer is based on the principle of electromagnetic induction. The current transformer consists of a closed core and windings. The number of the primary winding turns its little string in the current need to measure the line, so it is often all two line current flows through the primary winding turns are more connected in series of measuring and protection circuit, current transformer in operation, the two side loop it from the beginning to the end is closed, so the measurement instruments and protection circuit impedance in series with the coil current transformer is very small, close to the working state of short circuit. The current transformer is to change the primary side large current into two side small current to measure, the two side can not open circuit.
The LED light belt is made of a constant current transformer. Because the life of LED is only affected by the current, the power must be constant current.
