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switch wave
Shown here are the switching waveforms of the H5 and F5 variants versus the HighSpeed 3 device in a solar inverter of 2 kW. The vertical axis on the left illustrates the Voltage Waveform, the other on the right the current Waveform. The horizontal axis shows the time in nanoseconds. It has been performed in a very high time resolution, it is a 20 ns timescale. Looking at the current and voltage Waveform, the H3, here marked in green and the H5 marked in brown, one can see the similar current fall that translates in a similar voltage peak as shown at the upper side in light blue and marine blue. In comparison, the F5 as the Best-In-Class device. Even though it shows snappier behavior, it provides lower losses due to an extremely fast current fall (blue) and voltage rise (purple). However, the F5 variant needs an optimized layout design. Therefore, the H5 is a softer version, providing lower losses vs. previous IGBT generation (HS3). Taking into consideration the H5 and F5 version, the H5 offers a higher margin of design flexibility, due to softer switching waveform.
PTM Published on: 2014-03-18