bipolar (bjt) transistor families for audio power output stages - Page 79 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th May 2011, 09:22 AM   #781
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
From which of these listed types is expected, that they are also over a longer period of time available (at least for several years) and not obsolete respectively only available as cloned version ??
  Reply With Quote
Old 9th October 2011, 11:25 AM   #782
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by tiefbassuebertr View Post
From which of these listed types (about post #1) is expected, that they are also over a longer period of time available (at least for several years) and not obsolete respectively only available as cloned version ??
No comments?
  Reply With Quote
Old 9th October 2011, 01:06 PM   #783
blmn is offline blmn  Brazil
diyAudio Member
 
blmn's Avatar
 
Join Date: Feb 2001
Location: .
Well,

English is not my native language, but, considering that I understood the question, I suppose the family 1302/3281 and their improved new units must be in production for a long time.

Regards
  Reply With Quote
Old 27th November 2011, 06:01 PM   #784
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
I am looking for new launched BjT power devices for audio output buffer and general purpose applications.
What's currently new?
  Reply With Quote
Old 28th November 2011, 02:15 PM   #785
Account disabled at member's request
 
Join Date: May 2006
Sanken 2SA2223/2SC6145, besides excellent parameters, look at the excellent SOA obtained from TO 3P package.

IMHO, Sanken is still the best BJT power transistor manufacturer and if you buy from certain vendors you could get prices even or better than ONSEMI.

Last edited by homemodder; 28th November 2011 at 02:18 PM.
  Reply With Quote
Old 28th November 2011, 02:57 PM   #786
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by homemodder View Post
Sanken 2SA2223/2SC6145, besides excellent parameters, look at the excellent SOA obtained from TO 3P package.

IMHO, Sanken is still the best BJT power transistor manufacturer and if you buy from certain vendors you could get prices even or better than ONSEMI.
The main disadvantage for me by Sanken's (and Toshiba's) power BjT devices is the fact, that there are a lot of counterfeits on the marked, often very difficult to distinguish from the genuine/original versions - go to
Counterfeit Transistors
I have heard, that this risk by brands like Fairchild, ROHM and ST is significantly lower.
  Reply With Quote
Old 28th November 2011, 04:09 PM   #787
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default TO-252 (DPAK) BjT devices mounted on copper bar elements in parallel mode ??

In the meantime there are a lot of SMD outlines for power transistors.
The TO-252 (DPAK) discrete power BjT devices mounted on copper bar elements in parallel mode allows extrem robust properties regard safe operating aera.

What about this?
Are there any experiences?

Here various datasheets of good known types, but in today's prefer outline
http://www.st.com/internet/com/TECHN...CD00000828.pdf
http://www.st.com/internet/com/TECHN...CD00000829.pdf
http://www.st.com/internet/com/TECHN...CD00000831.pdf
http://www.st.com/internet/com/TECHN...CD00164144.pdf
http://www.st.com/internet/com/TECHN...CD00158496.pdf
http://www.st.com/internet/com/TECHN...CD00161335.pdf
http://www.st.com/internet/com/TECHN...CD00001311.pdf
http://www.st.com/internet/com/TECHN...CD00001311.pdf
http://www.st.com/internet/com/TECHN...CD00000830.pdf
http://www.st.com/internet/com/TECHN...CD00000830.pdf

http://www.st.com/internet/com/TECHN...CD00000833.pdf

This parts are suited both for solder the die carrier of the BjT on the copper-bar and for mounting the copper-bar on a big heatsink like this:
http://pictures.xbox-scene.com/xbox3...eatsink4-2.jpg
copper-bars:
Buy Copper and Brass Brass angle,1m L 1x1x1/8in RS 16525Q online from RS for next day delivery.
Welding Electrode and Materials of Taiwan Da Jie is a Welder Electrode and Material Manufacture
http://www.cut2sizemetals.com/images...tail/kbr-6.jpg
http://image.made-in-china.com/2f0j0...Copper-Bar.jpg

Solder hints for S M T:
http://www.littelfuse.com/data/en/Ap...tes/AN1005.pdf
http://www.infineon.com/dgdl/Process...19385051725a2e
http://www.imtek.de/content/pdf/publ...mente_PLUS.pdf

Thank you for comments
Attached Images
File Type: jpg DPAK-TO252.jpg (5.0 KB, 589 views)
File Type: jpg copper bar.jpg (210.4 KB, 594 views)
File Type: jpg Copper-Bar-II.jpg (25.6 KB, 579 views)

Last edited by tiefbassuebertr; 28th November 2011 at 04:23 PM.
  Reply With Quote
Old 11th December 2011, 06:56 PM   #788
dawsoo is offline dawsoo  Czech Republic
diyAudio Member
 
Join Date: Dec 2005
Location: Prague
Quote:
Originally Posted by tiefbassuebertr View Post
jinma: Thank you for this advice

No; - go to
??????????? Audio????: TTA1943, TTC5200????????? ?????????
to see the differences
datasheets in english are also available there.
http://www.semicon.toshiba.co.jp/doc...eet_090713.pdf
http://www.semicon.toshiba.co.jp/doc...eet_090713.pdf

TTA1943/TTC5200 vs 2SC1943/2SC5200

Compare Cob!!! 220/140pF vs 360/220pF ... Soa beta , and other is same
__________________
I love speed
  Reply With Quote
Old 28th December 2012, 10:44 AM   #789
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by tiefbassuebertr View Post
Are there really no books, application notes and literature about various emitter structures in Audio power bipolare junction transistors?
Are there any news?
  Reply With Quote
Old 28th December 2012, 03:01 PM   #790
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by tiefbassuebertr View Post
Are there any news?
Power transistors have their emitters and bases interleaved as narrow fingers. This is necessary to prevent “current crowding” and consequent “second break down”. In addition multiple emitter structure also reduces parasitic ohmic resistance in the base current path.

From what I understand each semiconductor manufacturer have there own
proprietary design to solve this.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Output transistor power dissipation. nigelwright7557 Solid State 11 26th May 2008 02:55 PM
Power horizontal deflection transistors work fine in output stages ? aldovan Solid State 7 31st August 2007 02:31 PM
sziklai-darlington diamond buffer (SDDB) for power output stages mtlin12 Solid State 5 1st April 2005 07:55 AM
power transistor output capacitance hienrich Solid State 3 26th December 2004 08:18 AM


New To Site? Need Help?

All times are GMT. The time now is 04:55 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2