With the continuous popularization of automobiles in people's lives, people's demand for electronic products in automobiles is also increasing. At present, the commonly used automotive electronic products, such as: GPS navigation, audio and video systems, TPMS, HID, and so on. However, when the car is turned on and abnormally working, it will generate a large surge, which will cause damage to automotive electronic products. Therefore, the country proposes that the power supply of automotive electronic products needs to pass the surge capability test. According to the characteristics of automotive circuits, we have launched For the anti-surge protection scheme on the car power supply, as shown below:

Device selection reference:

1) For 12V car power supply:

        TVS ---- 5KP20A/CA-5KP33A/CA (depending on the clamping voltage of the back-end chip)

        PTC ---- selected according to specific application.

2) For 24V car power supply:

        TVS ---- 5KP28A/CA-5KP48A/CA (depending on the clamping voltage of the back-end chip)

        PTC ---- selected according to specific application.