Examples of using Junction temperature in English and their translations into German
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Tj: the junction temperature of the light-emitting block.
All versions can be operated with junction temperatures of up to 170 C.
The junction temperature can be calculated from the temperature of the case, as seen below.
Difference between maximum junction temperature and ambient temperature. .
The efficiency of an LED typically rises with forward current,presuming constant junction temperature.
Therefore, the junction temperature can be inferred by measuring VBE.
The graph below is useful to determining Tj(junction temperature) during operation.
A 10° C lower junction temperature increases the lifetime by 10.000h.
Depending on the software parameterisation it is possible to limit the junction temperature by derating instantaneous power losses in real time.
With junction temperatures of up to 175°C, this technology delivers far superior performance than comparable solutions on the market.
With a thermal resistance Î̧j-a, ambient temperature Ta,power consumption P, the junction temperature can be calculated by the following equation.
In this way, the fatigue parameter“junction temperature increase” can be influenced as needed and challenging operating conditions managed.
Key features of the TN1605H-6G/6T families are a voltage robustness up to 1200V, a high noise immunity(dV/dt 200V/µs up to 150°C)and the low power dissipation performance at 150°C junction temperature.
This graph shows us that the junction temperature rises as the current application time persists, reaching a plateau state(called thermal saturation) after 200 seconds.
In this case, since Case-to-Heatsink is the heat-radiation path,it is possible to precisely calculate the junction temperature by measuring the case temperature at the point in the middle of such path.
This means, the junction temperature becomes 150 deg. when the current consumption is 0.5W, and the graph in this case suggests that the current beyond 0.5W can not be applied to TR.
In general,the LED luminous efficiency and service life declines with the increase of the junction temperature, when the junction temperature of 125℃ above, the LED can appear even failure.
At a junction temperature of 150 °C, the typical forward voltage is only 1.7V, which is 30 percent less compared to the previous generation. This represents the lowest forward voltage available on the market for 1200V SiC diodes.
Soldering technology: To make sure the LED heat to heat sink more faster,more uniformity and less heat resistance to keep led Junction temperature lower than warranty the led lamp long life time and lower light degradation.
Instead of determining semiconductor switching losses from current and voltage transients, PLECS records the semiconductor's operating condition(forward current,blocking voltage, junction temperature) before and after each switch operation.
Soldering technology: To make sure the LED heat to heat sink more faster,more uniformity and less heat resistance to keep led Junction temperature lower than warranty the led lamp long life time and lower light degradation.