SGS driver

[Nic van der Walt]

>Can anybody help me identify a 21 pin Multiwatt package Injector driver chip
>in a Motronic ECU ?
>
>I think it was made by ST, formerly known as SGS.

In all likelyhood it is just a dual or quad half bridge driver.

I have used them frequently in coil drivers. They demand an excellent
protection diode across the coil, otherwise they will fail quickly
and spectacularly. If the device is malfunctioning replace all the 
diodes around it with higher spec devices. When used with the correct
clamping diode these components are great, but expensive.

Some of the ST components have current monitoring, should work
great for injector checking.





Regards,
Nic van der Walt

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