Popular light emitting diode drops to 1.6V-2.1V, and the characteristics of the working current of 5-20mA LED 1. The meaning of the limit parameter (1) Promise power consumption PM: promise to add the two heads of LED to DC voltage voltage The oldest night value that flows through it. Cross this value, LED fever and destruction. (2) Positive DC current IFM: The most important databst current promised. This value can destroy the diode. (3) Reverse voltage VRM: The most old reverse voltage promised to add. With this value, the light emitting diode may be broken down and destroyed. (4) TOPM: The temperature scale of the light -emitting diode can work normally. Below or higher than this temperature, the light -emitting diode will not work properly, and the effect of declined. 2. Significance of electrical parameters (1) Positive working current IF: It refers to the positive current value of the normal glowing of the diode when glowing diode. In real use, you should choose if you need to choose if you need·Below ifm. (2) Positive working voltage VF: The working voltage given in the parameter table is obtained under a given forward current. It is usually measured when IF = 20mA. The luminous diode is on the operating voltage VF at 1.4 3V. When the external temperature rises, VF will land. (3) V-I feature: When the relationship between the voltage and current of the light-emitting diode is less than a certain value (called the threshold), the current is extremely small and does not emit light. When the voltage spans a certain value, the forward current is agile with voltage and glows. How to remove the I can remove the positive voltage of the light tube, the reverse current and the reverse voltage of the light pipe from how to remove the V-LED lamp bead. Positive luminous pipe reverse leakage current IR
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