Interesting new devices - 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 5th March 2010, 11:08 AM   #1
jez is offline jez  United Kingdom
diyAudio Member
 
Join Date: Jan 2004
Location: n.e england
Default Interesting new devices

Check out this URL. Good to see something "new" for audio apps...

http://www.semelab.com/pdf/magnatec/...LF08NP20V5.pdf
  Reply With Quote
Old 5th March 2010, 11:17 AM   #2
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
The two "complimentary" devices in a single package is somewhat doubtful.
  Reply With Quote
Old 5th March 2010, 11:40 AM   #3
diyAudio Member
 
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Doesn't seem a good idea. Having them in the same package makes them harder to cool as a heatsink works best with multiple heat sources.
  Reply With Quote
Old 5th March 2010, 12:38 PM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
presumably this will work perfect in Class D apps ...and probably there should be the target
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 5th March 2010, 12:54 PM   #5
diyAudio Member
 
Join Date: May 2009
I miss the possibility of adding source-resistors.
Though I admit I'd have to check again, why I think I might need them. Maybe for paralleling due to the...

...quite low current rating.
what am I supposed to do with 8Ap at 200V

Maybe usefull for a compact 2x30W@4R (2x60W@8R) Stereo with one of these per channel, but actually there are ICs for that, wich are even smaller than an amp built with these new devices, if size is the measure.

Maybe someone can find and point out an application, where these devices can make an advantage.

PS: in class D you don't really need linear devices, you don't need low threshold voltage. In fact you need the oposite for D - you want to have low leakege current and high gm for fast switching, and especially the lowest R_ds_on wich these devices here definitely fail to have. I have already seen combined p/n devices in one package for switching apps, though i don't remember wether they were powerfull enough.

Last edited by krachkiste; 5th March 2010 at 01:03 PM.
  Reply With Quote
Old 5th March 2010, 12:56 PM   #6
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
Quote:
Originally Posted by sakis View Post
presumably this will work perfect in Class D apps ...and probably there should be the target
whatever the amplification class , they will surely find their way in
7.1 AV amps..
The manufactureres will then claim "high end mosfet powered",
while at the same time reducing the manufacturing costs.
Two hits with a single stone.
  Reply With Quote
Old 5th March 2010, 02:45 PM   #7
ilimzn is offline ilimzn  Croatia
diyAudio Member
 
Join Date: Feb 2005
Location: Zagreb
This is a lateral MOSFET which means it would be very inefficient in class D due to high Rdson. It is intended for linear operation.
Maximum power dissipation for lateral MOSFETs on which this part is based is on the order of 80-100W and it's mostly determined by the die size. The case used, if well executed, can manage 150W under the same conditions so it's not unreasonable to put two dies in there - it would be if they used larger 10A dies.
This device is really intended to replace the output transistors in a single pair design, which realistically limits the output power to some 50W or so. In such cases source resistors are not required (in fact, they may even not be desired) as the laterals already have low gm and rather large rail losses, and there is no need to fit them for thermal stability. That being said, a close look at the curves shows that the N part has higher gm than the P part (in common with older types that these are based on), so there have been designs where this was equalized somewhat by the inclusion of a source resistor in the N-ch part's source only, even though this requires a lot of consideration for changes in gm vs temperature.
  Reply With Quote
Old 5th March 2010, 03:44 PM   #8
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Excellent devices for vertical deflection in CRT monitors.
__________________
The Devil is not so terrible as his math model is!
  Reply With Quote
Old 5th March 2010, 04:14 PM   #9
soekris is offline soekris  Denmark
diyAudio Member
 
Join Date: Jun 2009
Yeah, the market for new CRT monitors is a fast grow opportunity :-)

Søren
  Reply With Quote
Old 5th March 2010, 06:02 PM   #10
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by soekris View Post
Yeah, the market for new CRT monitors is a fast grow opportunity :-)

Søren
Sure. High-end, Vacuum Tube monitors.

In milled aluminium cases, with golden knobs and buttons, golden RCA inputs, directional power cable.
__________________
The Devil is not so terrible as his math model is!
  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
Precision devices...... Village Plank Multi-Way 10 14th December 2008 07:49 PM
Precision Devices tinitus Multi-Way 1 8th January 2008 12:57 AM
how to match devices -help- Stefanoo Pass Labs 7 3rd January 2007 06:39 AM
Interesting new (mis)utilization of class D devices itsmrdavid Everything Else 8 6th September 2005 09:32 AM
Output devices? Mr Evil Class D 42 12th January 2005 02:18 PM


New To Site? Need Help?

All times are GMT. The time now is 01:02 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