Please contact HIROSE ELECTRIC. CO., LTD.
Please contact HIROSE ELECTRIC. CO., LTD.
When you estimate the junction temperature Tvj, please use the chip characteristic data for the calculation.
If roller and/or spatula is used to apply thermal grease, the amount of application may vary or it is impossible to coat the grease evenly. Therefore, those tools are not recommended. Instead, we strongly recommend an application of the grease using stencil masks (See Q40).
They are the same. Refer to the Data sheet of each type for resistance value and B constant.
The temperature of the NTC thermistor and the heatsink temperature Ts are different.
The temperature of the NTC thermistor and the junction temperature Tvj are different. The junction temperature Tvj becomes higher than the temperature of the NTC thermistor. The thermistor is mounted on the same insulating substrate as the IGBT chip but is away from the IGBT chip. It follows the junction temperature Tvj with an offset […]
The temperature of the NTC thermistor and the case temperature are different. Generally speaking, the case temperature Tc directly under the chip becomes higher than the temperature of the NTC thermistor.
The case side temperature and the case temperature Tc are different. Heat of a semiconductor chip is conducted through an insulating substrate to the copper base and heatsink. The case side temperature becomes considerably low, compared with Tc.
It is not an average value across the copper base plate. It is the case temperature directly under the chip.
There is a temperature difference between the surface temperature and the backside temperature. The latter becomes higher.