The IPM module features high operational reliability, powerful functions, self-diagnostic and protection capabilities, thus which is attracting the attention of electronic semiconductor manufacturers. The IPM module has multiple built-in power devices, which has very high heat dissipation requirements, so it needs to rely on NTC chip for over-temperature protection and temperature control to ensure that the IPM module can operate stably at the appropriate temperature.
To ensure the accuracy of temperature monitoring, the NTC chip needs to be installed close to the IPM module heat source. Normally, the lower surface of the NTC is soldered to the insulating substrate of the IPM module, and the upper surface is electrically connected to the protection circuit by wire bonding. This enables real-time perception of IPM junction temperature, rather than just measuring ambient or housing temperature. During the operation of the IPM module, when the temperature of the insulating substrate changes, the resistance value of the NTC chip will also change accordingly. Once the measured temperature exceeds the preset temperature threshold, the protection circuit will respond immediately and quickly turn off the gate drive signal. The shutdown of the gate drive signal causes the IGBT in the IPM module to stop working, thereby preventing the current from continuing to flow in and avoiding further damage to the IPM module due to excessive temperature. When the temperature gradually decreases and returns to the safe range, the protection circuit will restore the gate drive signal, so that the IGBT can resume normal operation and ensure that the IPM module can work smoothly. Therefore, without the assistance of NTC chip, it will be difficult for IPM module to achieve accurate temperature monitoring, and its reliability advantage will be greatly reduced.
In order to promote the development of IPM module in the direction of high-quality temperature management, EXSENSE Electronics recommends the use of DT-A series silver termination NTC chip, which:
1. High accuracy: ensures that the temperature data is correct and reliable
If there is a deviation in the temperature information acquisition, the IPM module may misjudge the temperature situation, causing the over-temperature protection function to be triggered early or delayed, which in turn will cause equipment failure and affect the stability and reliability of the entire system. Therefore, with the help of EXSENSE Electronics' high-accuracy silver termination NTC chip, IPM can reduce the error rate of temperature acquisition and improve the accuracy of the IPM module's own temperature state judgment.
2. Fast response: keenly captures subtle temperature changes
When the IPM module has extremely small temperature fluctuations during operation, the silver termination NTC can respond quickly. This allows the IPM module to detect potential overheating risks in time and take corresponding protection measures in time, such as adjusting power output, starting heat dissipation devices, etc., before the temperature causes serious damage to the equipment, thereby preventing equipment failures caused by overheating and improving the working safety of the IPM module.
3. Small size: adapts to the compact design requirements of IPM module
In recent years, IPM module has gradually evolved in the direction of integration and miniaturization, and the small size of DT-A series silver termination NTC chip is just in line with this development trend. The small size of the silver termination NTC will not occupy too much circuit board space of the IPM, which is not only conducive to the overall layout design of the IPM module, but also reduces the volume and weight of the entire equipment, improves the space utilization rate of the device, and meets the needs of IPM lightweight requirement.
In response to the design requirements of previous IPM module with higher power density, smaller size and higher reliability, the temperature monitoring role of silver termination NTC chip in it is self-evident. From the perspective of temperature monitoring, its high accuracy makes the temperature measurement process of the IPM module efficient and accurate. Its fast response to quickly sense temperature changes enable the IPM module to detect potential overheating risks in time and take protective measures in advance. In terms of adaptation module design, the small size of the DT-A series silver termination NTC chip saves the internal installation position of the IPM module, allowing it to function normally even in limited space.
