Light emitting diode technology
Von mademms, 12.06.2012, 09:121limit values
(1) allows the power consumption to Pm: allows LED light emitting diode ends of positive DC voltage and the current through it is the product of the maximum. This value is exceeded,A19 LED Light Bulb dab4d52ck a LED heating, damage.
(2) the maximum DC forward current IFm: allows the adding maximum DC forward current. More than this value can be damaged diode.
(3) the maximum reverse voltage VRm: allows the maximum reverse voltage. This value is exceeded, a luminous diode may be breakdown.
(4) the working environment of topm: light-emitting diodes working environment temperature range. Below or above this temperature range, the light emitting diode can not work normally, greatly reduce the efficiency of.
2 electrical parameters of significance
(1) forward current If: it refers to the light-emitting diode illuminating positive current value. In actual use should be selected according to the need of IF in 0.6IFm below.
(2) the positive voltage VF: parameters are given in the table working voltage is given in the forward current under the. Generally in the IF=20mA when the measured. Light emitting diode forward voltage of VF in 1.4~3V. In the outside temperature, VF will drop.
(3): V-I characteristics led the relationship of voltage and current
In the forward voltage is smaller than a certain value ( called threshold ), current is small, no light. When the voltage exceeds a certain value, the forward current with voltage increases rapidly, led. From V-I curves can be drawn led forward voltage,ipazzport bluetooth keyboard reverse current reverse voltage and other parameters. Positive light emitting tube reverse leakage current of IR<10 μA.
(1) allows the power consumption to Pm: allows LED light emitting diode ends of positive DC voltage and the current through it is the product of the maximum. This value is exceeded,A19 LED Light Bulb dab4d52ck a LED heating, damage.
(2) the maximum DC forward current IFm: allows the adding maximum DC forward current. More than this value can be damaged diode.
(3) the maximum reverse voltage VRm: allows the maximum reverse voltage. This value is exceeded, a luminous diode may be breakdown.
(4) the working environment of topm: light-emitting diodes working environment temperature range. Below or above this temperature range, the light emitting diode can not work normally, greatly reduce the efficiency of.
2 electrical parameters of significance
(1) forward current If: it refers to the light-emitting diode illuminating positive current value. In actual use should be selected according to the need of IF in 0.6IFm below.
(2) the positive voltage VF: parameters are given in the table working voltage is given in the forward current under the. Generally in the IF=20mA when the measured. Light emitting diode forward voltage of VF in 1.4~3V. In the outside temperature, VF will drop.
(3): V-I characteristics led the relationship of voltage and current
In the forward voltage is smaller than a certain value ( called threshold ), current is small, no light. When the voltage exceeds a certain value, the forward current with voltage increases rapidly, led. From V-I curves can be drawn led forward voltage,ipazzport bluetooth keyboard reverse current reverse voltage and other parameters. Positive light emitting tube reverse leakage current of IR<10 μA.
