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David Ashton
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Natty devices...
David Ashton   9/9/2013 7:40:27 PM
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Never heard about these before, thanks Aubrey.  I can think of a few uses for them apart from the intended automotive ones.

antedeluvian
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Re: Natty devices...
antedeluvian   9/9/2013 8:16:31 PM
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Hi David

Aside from standard I/O type stuff, we have used the IR part as a form of peak current shutoff on a power supply using the current mirror to drive a comparator.

David Ashton
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Re: Natty devices...
David Ashton   9/10/2013 5:21:37 AM
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Thanks, Aubrey.  I was thinking of using it on an analogue variable power supply, before the main pass transistor.  Apart from being able to switch the output off electronically, you could get a ground-referenced voltage proportional to output current - very useful for measuring output current using a standard DVM module - which on a variable PSU is otherwise not easy..  Looking at the specs for your IR3314, I think it would work  ok.  I'll look at the others as well.  Are these things expensive?

antedeluvian
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Re: Natty devices...
antedeluvian   9/10/2013 8:48:48 AM
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David

 Are these things expensive?

This is an incredibly complex question. What is a good price for me is really expensive for someone designing for the mass market. Before I overwax philosophical though, it seems to me you are only interested in a single unit, so I will only state the price from Digikey for the automotive version AUIR3314S is C$4.81. (C$1 is approx US$1.) Apparently it is still available in a TO220 pack, if you want ease of connection although you may struggle to find it in that format although I see Digikey have 6 at C$6.95 at the moment and Mouser have it in abundance.

Max The Magnificent
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Check out the ADVANCED SENSE Guide
Max The Magnificent   9/10/2013 10:47:13 AM
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Speaking of high-side power switches with protection and diagnostic functions, have you read Infineon's ADVANCED SENSE Calibration and Benefits guide (http://tinyurl.com/ADVANCED-SENSE-1-0)?

As an aside... I happen to know that the guys who wrote this little rascal are incredibly clever and handsome and witty ... the words all appear to have been hand-picked at the crack of dawn while the morning dew is still glistening on them, and it goes without saying that the quality of the diagrams is fantastic...

antedeluvian
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Re: Check out the ADVANCED SENSE Guide
antedeluvian   9/10/2013 10:59:34 AM
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Max

the words all appear to have been hand-picked at the crack of dawn while the morning dew is still glistening on them,

These are the exact same words that I saw on an old recipe for making Rose Petal Jam. (new recipes like this, lose the magic!) I printed the manual out, shredded it and spread it on bread- but it doesn't taste anything like jam!

Seriously though- a well written document. Infineon obviously has good taste in authors.

Max The Magnificent
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Re: Check out the ADVANCED SENSE Guide
Max The Magnificent   9/10/2013 11:03:10 AM
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@antedeluvian: These are the exact same words that I saw on an old recipe for making Rose Petal Jam...

I thought you were joking, but I wen tto read the recipe (I couldn;t help myself) and saw the following:

If you're picking the roses yourself, the best time is in the late morning, after the dew has dried and before the strong afternoon sun.

I'll have to remember this recipe :-)

antedeluvian
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Re: Check out the ADVANCED SENSE Guide
antedeluvian   9/10/2013 11:10:00 AM
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Max

Just going through the document and looking at section 2.5 on characteristics of straight lines. Seemed rather conicidental- have you seen my current blog on calibration over on Planet Analog?

Max The Magnificent
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Re: Check out the ADVANCED SENSE Guide
Max The Magnificent   9/10/2013 11:33:35 AM
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@antedeluvian: ...have you seen my current blog on calibration over on Planet Analog?

I hadn't -- but I have now :-)

Sanjib.A
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Very much useful
Sanjib.A   9/10/2013 2:05:40 PM
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@Aubrey, thank you for sharing information on these current sense devices. I was not aware of these devices and never used so far. But looks like I sould be able to make use of these devices in my designs. You mentioned about calibration. Do these devices require runtime calibration or one-time calibration in the factory before shipping? Without calibration does it make a huge deviation or could the tolerance be accommodated in the firmware if too much of accuracy not needed?

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