We can choose to use transient voltage suppression diode (referred to as LED household protection circuit). Transient voltage suppression diode is a diode in the form of high-performance protection device. When its poles by the reverse transient high-energy impact, the negative 12 power of 10 seconds of a very short time speed, so that between the poles of the high impedance immediately reduced to the low resistance to absorb up to several kilowatts power surge between the poles of the voltage clamp at a predetermined voltage value, the effective protection of the precision components in LED household protection circuit. Transient voltage suppression diode has the advantages of fast response time, the transient power, low leakage current, breakdown voltage deviation of consistency, the clamping voltage is easier to control without damage to the limit of small size.
But in actual use is not very satisfactory. The first is to find very easy to meet the requirements of the voltage value of the TVS device. TVS devices are mainly u LED household protection circuit and led high bay lights of the supply voltage is 24V or 12V, this voltage for normal LED lighting products is rarely finished, the test is not good. At the same time, we know: the LED light bead damage is caused because the current ambassador chip internal overheating. LED household protection circuit can only detect over-voltage can not detect over-current. Overvoltage, over current, but to select the appropriate voltage protection point difficult to grasp, this device will not be able to produce it is difficult to use in practice.