Chips on PCB of Bosch pump VP44?

[dds737]

Can somebody identify these? It's almost impossible to  identify producer :-/

Thanks!

[Andreas]

Can somebody identify these? It's almost impossible to  identify producer :-/

Hello,

seem to be customer specific produced parts.
The maximum you can try is to identify them by function.
But this is only possible if one knows the surroundings.

The 8 pin could be one of: CAN-driver, current measurement amplifier ...
so are they near a shunt resistor (perhaps on the other side), or common mode CAN choke?

The 14 pin could be perhaps analog multiplexers, LM290x OPAmps/Comparators, or discrete logic.

With best regards

Andreas

[Richard Crowley]

Unless you can find good documentation for the Bosch VP44 unit, finding any information about OEM house-number components is practically impossible.
You did not reveal WHY you want identify these chips.  If you are thinking that you can somehow repair or modify that board without good documentation, you may be dreaming.
And even if you COULD identify the chips AND you could obtain good documentation, the chips may very well be custom-made, presenting yet another dead-end.

[dds737]

Unless you can find good documentation for the Bosch VP44 unit, finding any information about OEM house-number components is practically impossible.
You did not reveal WHY you want identify these chips.  If you are thinking that you can somehow repair or modify that board without good documentation, you may be dreaming.
And even if you COULD identify the chips AND you could obtain good documentation, the chips may very well be custom-made, presenting yet another dead-end.

Well, originally it was discussion on one Serbian forum about VP 44 board repair last year,  and I mentally touched subject again and posted question for help here. I see your point, this is tough nut to crack, if not impossible with limited resources (no docs, probably custom made chips)

[amyk]

Tracing the schematic would help greatly in identifying their function.

The font on the first set looks like they're made by Philips/NXP.

[wagon]

Bosch do some weird stuff.... once I reverse-engineered and then replaced (with common parts) a chip in an engine controller for a ride-on lawnmower engine.  It has two or three low-side drivers and a 5 volt regulator in it.  I don't recall seeing anything like that in other products.