Automotive ECU Driver IC

IC 30403 is most commonly known as an automotive engine computer (ECU) driver chip manufactured by Bosch. In automotive electronics repair communities and parts listings, it’s described as a driver/injector control IC used on ECU circuit boards for certain vehicle models (e.g., Opel, Mercedes CDI, VW/Audi ECUs). It typically comes in an HQFP-64 / QFP-64 surface-mount package.

🔧 Typical roles in an ECU:

Injector driver / control logic — interfaces between the ECU microcontroller and high-power injector or actuator circuits.

ECU board “driver” IC — a part that often fails and is replaced during repairs of diesel or gasoline ECUs.

📍 Package & Marking:

QFP-64 / HQFP-64 surface-mount (64-pin).

Marked simply 30403 or with additional internal coding (e.g., CJ920BA in some seller listings).

🚗 Vehicles where it appears:

This IC is sold as a Bosch ECU driver for vehicles like Opel and Mercedes CDI models and also appears in parts lists covering diesel and petrol ECU boards across various manufacturers such as VW, Audi, Mercedes, etc.

🧠 Summary

IC 30403 is not a general logic or memory IC that you’d find in consumer electronics — it’s a specialized automotive power/driver integrated circuit produced by Bosch, used mainly in engine control computer boards to drive injectors or actuators in diesel and gasoline engines.

If you have an image of the chip marking or the ECU board it came from, I can help you confirm its exact function and compatibility with specific vehic