Author Message
 Post subject: D-PAK pattern
PostPosted: 18 Aug 2017, 18:03 
Offline

Joined: 14 Jun 2010, 12:59
Posts: 17
I have a design that calls for an ON Semiconductor KA7809ERTM 3-terminal voltage regulator. It is a D-PAK, which seems to also be known as a TO-252 pattern. I do not find either D-PAK or TO-252 in the DipTrace patterns library.

Is there another name for this pattern?

Steve


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 18 Aug 2017, 19:27 
Offline
Expert

Joined: 20 Jun 2015, 14:39
Posts: 944
For some unknown reason, DipTrace didn't put a hyphen in the name. They call it "TO252" instead of "TO-252". You will find it in the library named "TO", which contains several "TO252" variants.

_________________
Tom


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 18 Aug 2017, 20:56 
Offline

Joined: 14 Jun 2010, 12:59
Posts: 17
Thank you Tom. Found them.

Any insight as to what the rest of the numbers in the pattern name mean?

For instance, pattern TO252-3(4)/10x6.6x2.28. I understand that 2.28 means 2.28mm pin spacing. What does 3(4) mean? What does 10 mean? And 6.6?

Thanks.


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 19 Aug 2017, 06:01 
Offline
Expert

Joined: 20 Jun 2015, 14:39
Posts: 944
At the bottom of page 31 in DipTrace's Pattern Names Help guide located here - http://diptrace.com/books/Pattern_names_help.pdf - it looks like the following translations apply...

3(4)
There are 3 actual pads, but 4 "imaginary" pads. My interpretation: there are a total of 4 pads (including the heatsink flag), the center pad (lead) is missing and the heatsink flag is to be used as a substitute connection.

10x6.6
The length of the leads as measured along the X-axis is 10 mm. This appears to be an end-to-end (lead-to-flag) measurement.
The width of the package/body as measured along the Y-axis is 6.6 mm.

p.s. It looks like there are two D-PAK pattern variants in the library, but they, too, are missing the expected hyphen and actually have the naming prefix of "DPAK".

_________________
Tom


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 19 Aug 2017, 11:05 
Offline

Joined: 14 Jun 2010, 12:59
Posts: 17
Wonderful! I would never have worked through that on my own. And thanks for the link to the pattern names help pdf, I didn't know it was available.

Are there other DipTrace help documents?


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 19 Aug 2017, 12:18 
Offline
Expert

Joined: 20 Jun 2015, 14:39
Posts: 944
Feel free to explore the [Support] drop-down menu on the DipTrace home page. I found the Pattern Names Help document by clicking on the [Tutorials] tab.


You do not have the required permissions to view the files attached to this post.

_________________
Tom


Top
 Profile  
 
 Post subject: Re: D-PAK pattern
PostPosted: 19 Aug 2017, 13:27 
Offline

Joined: 14 Jun 2010, 12:59
Posts: 17
Thanks!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group