Please help me to identify this TO220-22 IC Chip for BMW TCM. Thanks !!!

The logo in the upper right corner is the company logo of Bosch. Your might want to contact them:

But don't hold your breath. I have done chip projects with automotive foundries and the stuff they do is usually highly proprietary, meaning that it may be possible that they never release any information except to BMW.

On Thu, 21 Jun 2007 11:58:13 -0700, virtualgarage put finger to keyboard and composed:

Whenever I reverse engineer automotive electronics, I start at the connector and work inwards.

The 6 caps nearby would suggest 6 drivers with 3 pins per driver plus power and ground pins (???). Look for any symmetry.

If the problem is limited to one driver, then you may be able to substitute a single discrete driver at the rear of the heatsink.

- Franc Zabkar

Joerg schrieb:

Not even BMW will get detailed information about such proprietary chips/hybrids.

Regards, Dieter

In that case, if it is a Bosch design then the OP should be able to buy that hybrid from Bosch. At least when I lived in Germany this company was very good about selling spare parts. I even got motor brushes for a

Joerg schrieb:

Bosch does not sell such parts to consumers.

You are talking about two differnt companies, this is Bosch-Siemens-Homeappliances, a joint venture of Bosch and Siemens. And nowadays you will be lucky to get spare parts after more than 10 years.

Regards, Dieter

Not a good thing IMHO. It precludes the discovery of secondary applications and thus potential "upside" sales.

Also not good. Once people find that out they tend to think that they might as well buy everything at Walmart then. Why pay more if there isn't a tangible benefit?

I assume the logic is that it avoids a lot of support costs.

Not necessarily. Just state openly that this is a specialty product with little support. Honesty goes a long way. Lots of EEs are used to that. For example those who must turn every penny in their BOMs and have to rely on Asian sources. Even if you are fluent in Japanese or Chinese support can still be hard to come by and the time zones don't exactly help.