When the IGBT is turned off, a surge voltage will occur between the collector and the emitter due to the energy stored in the inductor. The snubber circuit suppresses overvoltage applied to the IGBT and increases turn-off losses. This is because the snubber capacitor can share part of the energy during shutdown. Be sure to handle the energy absorbed by the capacitor properly.
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What is quarantine? Galvanic isolation: Charge cannot move from one circuit to another, and signals from both parties exchange information through other means.
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Recently, the packaging and testing industry in mainland China has been undergoing a lot of changes.
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The circuit of IGBT under diode clamped inductive load conditions is shown in Figure 1. This circuit is a commonly used IGBT circuit and can be used as a test circuit for IGBT switching characteristics to evaluate the on and off behavior of IGBT. Figure 2 shows the actual IGBT switch waveform obtained by comprehensively considering the recovery characteristics of diodes and stray inductance (Ls), which can be used as a reference for designing IGBT drive circuits. Firstly, we set the IGBT to operate under continuous steady-state current conditions, flowing through an inductive load and then through an ideal freewheeling diode parallel to the inductive load.
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The Asia-Pacific region commands the largest market share in power semiconductors, with an estimated CAGR of 3.6%. China, Japan, Taiwan, and South Korea collectively contribute around 65% of the global discrete semiconductor market, while countries like Vietnam, Thailand, Malaysia, and Singapore also play significant roles. North America follows closely, expected to reach USD 8.5 billion by 2030 with a CAGR of 2.6%. The region boasts early adoption of new semiconductor technologies, particularly in automotive, IT, telecommunications, military, aerospace, and consumer electronics.
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Singapore’s RF GaN chip vendor Gallium Semiconductor is closing its doors, including those of its R&D center in Nijmegen, The Netherlands. The decision to shut the company and let go of all the employees has been made by GaasLabs LLC, the investment company that wholly-owns Gallium Semiconductor and has funded it since it was founded in 2020. The decision was made following the death in November 2023 of John Ocampo, the founder of GaasLabs.
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