Fortuitous Open Ground on TDA7560 Bridge Amp Module

[D from BC]

Yes I do make the occasional electronics post..

http://www.st.com/stonline/books/pdf/docs/6886.pdf
See page 1, to the right below the picture..
The TDA7560 has 'fortuitous open GND' in the protection feature list.
But what is it?

500000 words in the English language!

Fortuitous means
1: Occurring by chance
According to http://www.merriam-webster.com/dictionary/fortuitous

I can get an open ground occurring by chance? Lucky me.
The TDA7560 has 6 out of 25 pins that make ground connections and one
via cap.
I wonder which grounds can be fortuitous.

I'm guessing the fortuitous open gnd protection refers to if the signal
ground gets cut, the amp or speakers don't blow.

 

[D from BC]

Nice chip!

Not cheap. ~$30.00US from Mouser.
My assumption was this would be a mass produced chip for car auto and
hence have a ~$5.00 price. But nope.

The ones to each output stage?

There's something goofy about that.
I'm not expecting fortuitous output stage ground disconnections on the
pcb. My pcb work is not crappy enough.

 

[Spehro Pefhany]

Yes I do make the occasional electronics post..

http://www.st.com/stonline/books/pdf/docs/6886.pdf
See page 1, to the right below the picture..
The TDA7560 has 'fortuitous open GND' in the protection feature list.
But what is it?

Fortuitous means
1: Occurring by chance
According to http://www.merriam-webster.com/dictionary/fortuitous

I can get an open ground occurring by chance? Lucky me.
The TDA7560 has 6 out of 25 pins that make ground connections and one
via cap.
I wonder which grounds can be fortuitous.

I'm guessing the fortuitous open gnd protection refers to if the signal
ground gets cut, the amp or speakers don't blow.

Yeah, probably poorly translated from an Italian or French (being ST)
word meaning "accidental".

Any native Francophones/Italian speakers care to comment? "Fortuit"
looks like a likely candidate for mistranslation from French.


Best regards,
Spehro Pefhany