At present, most IGBT manufacturers will encapsulate NTC thermistor chip inside IGBT module and use it to measure the shell temperature of module. Thermistor chip has high accuracy, which can accurately monitor internal temperature of IGBT. Its size is small, the operation is not affected by the installation position and other factors. IGBT, as a representative product of the third revolution of power electronics technology which is recognized internationally, and it belongs to the "02 special" key support project in China. IGBT can adjust the voltage, current, frequency and phase in the circuit according to the signals and instructions in the industrial devices, so as to achieve the purpose of precise control. It is widely used in the fields of motor energy saving, rail transit, smart grid, aerospace, household appliances, automobile electronics, new energy power generation, new energy vehicles and so on.
According to data of IHS, as the world's largest consumer of power semiconductors, Chinese market demand reached $13.8 billion in 2018, the growth rate is 9.5% and accounting for 35% of global demand. IHS predicts that Chinese power semiconductors will continue to grow at a high rate in the future, with the market expected to reach $15.9 billion in 2021, representing an annualized growth rate of 4.8%. According to data from China Industry Information Network, the IGBT market in China reached ¥16.19 billion in 2018, up 22.19% year on year and significantly higher than the global average.
According to the forecast of TrendForce, the scale of domestic IGBT industry will increase to ¥52.2 billion in 2025, with a compound annual growth rate of 19.1%. Therefore, the development of domestic IGBT chips to break the international technology blockade, is to ensure the development of the national basic strategic industry needs. With the support of a series of national policies and measures such as new energy, energy conservation and environmental protection "the 12th Five-Year Plan", the development of domestic IGBT has also gained great impetus, and the market continues to grow rapidly. According to statistics from IHS, the top three products in Chinese power semiconductor market are power management IC, MOSFET and IGBT, which account for 60.98%, 20.21% and 13.92% of Chinese power semiconductor market in 2018 respectively.
However, at present, domestic power semiconductor enterprises only begin to widely replace in the field of diode and thyristor, while in the field of MOSFET and IGBT, there is still a big gap with foreign enterprises. In the domestic IGBT market, overseas manufacturers also account for more than 50% of the market share, so the space for domestic substitutes is very broad. According to data of IHS, the world's top 10 IGBT module suppliers account for 77.7% of the total, of which only one domestic company entered the ranking, with a 2% market share. According to ASMC disclosure, more than 90% of IGBT products in China need to be imported. Therefore, the development of domestic IGBT has a long way to go.
NTC thermistor chip developed and manufactured by EXSENSE Electronic Technology Co., Ltd. has the characteristics of high accuracy, high sensitivity and great reliability, which can better monitor and control the temperature inside IGBT module and ensure the safe use of IGBT in the working process.