The reason of led damage
There are effect of service time in led light device. they are excess current and excess heat respectively,
The excess current is that the work current over rate current, it cause voltage impact .other damage way is over heat, the disadvantage will reduce service time of led. The invalid of led drive and the led itself as flawed will cause led break,
Those reason is mainly reason to break the led. in general , the excess voltage impact of input power and short circuit of electrical circuit will cause damage to the power and drive of led . and it also cause damage to the component. the short fault of short circuit may cause excess driver.the short circuit of driver electrical circuit will cause damage to the led . the test proved , this is close relate between the led perform and PN junction, the PN junction temperature of LED raise 10℃, the service time will reduce 50%
The rate current of common led is 20mA, the current was raise by various of use reason, and have not taken steps to prevent led, the current will over rate current and to damage the led.
First reason is that supply voltage raise suddenly. a particular component is in short circuit ,to make the a particular voltage
The upper paper is some reason of led fault.