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UCC1926 question

Aaron Spaete
Expert 4275 points

UCC1926.docxTeam,

I am posting this hear in hopes one of the Unitrode gurus can answer.

The part is UCC1926 (mil temp range) and UCC2926 (industrial temp).

 

Now I need your help with this part.

 

First of all, is there anyone within the TI organization that would have intimate knowledge of this part?  

 

We need to "pick his brain" with a series of questions regarding this part.

 

Here's where we're coming from:   we have a source of the die for this part, and would like to have an outfit package them for us.

 

So then some issues/questions that come up really deal with how Unitrode used to make these parts and if our folks (source & packaging) going to follow the same "recipe" that produced these parts to meet the specifications...

 

I have attached the data sheet for the UCC1926.

 

Here is a specific example of a possible issue/question for your TI member who may know of this part:

 

 

Since this part is a "20A Integrated current sensor", it has an internal current sense resistor capable of passing 20 amps through it, as captured below:

 

  

 

Now this is something we don't see often in the industry, and if it were easy to do this, one would think a plethora of products would have this.  So how exactly is this current sense resistor manufactured within this chip?  Is it part of the die?   Or is is an external "construct" of some sort?  Perhaps part of a lead frame?   The "sensitivity" of this current sense resistor & amplifier to temperature is reflected in the specification below:

 

 

The range for the voltages increases as the temp range increases.  So one would think that would definitely affect the performance....

 

So, the bottom line is, we need you to look into possible resources/personnel that could help us with this obsoleted TI part.

 

I know this isn't leading to a new design win or opportunity, but it does illustrate "back-end" support for your legacy products.

 

Please let us know if you'll be able to help us out with resources/personnel familiar with this product.

 

Please let us know if you'll be able to help us out with resources/personnel familiar with this product.

Regards,

Aaron