Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

L30D IRS2092 IRFB 4227  IRAUDAMP9 MYDIY
L30D IRS2092 IRFB 4227  IRAUDAMP9 MYDIY
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 20th August 2017, 12:34 AM   #91
K-amps is offline K-amps  United States
diyAudio Member
 
K-amps's Avatar
 
Join Date: Nov 2003
Location: Indiana
I already have power supplies for this project. Very nice encapsulated toroids... I might consider the Sure kit... I currently dont have the bandwidth in time to tackle this. I need to set up my HT quick...
  Reply With Quote
Old 1st February 2018, 09:20 PM   #92
Ivanovv is offline Ivanovv  Macedonia
diyAudio Member
 
Join Date: Sep 2016
Default Resetting issue

Quote:
Originally Posted by nigelwright7557 View Post
I only found a problem if I attached the scope probe after it was switched on.
If you attach the scope probe first then switch it on it will be ok.

I spent a long time learning about the 2092. It took me 3 pcb revisions before I got one that didn't reset on high power output.
My decoupling and pcb layout was poor.
The output mosfets need close decoupling and also need snubbers.
The 2092 needs decoupling close too.
Nigel can you help me with my issue on l30D. It worked well now start to reset on half the power. On dc+ rail measuring above 1.4Amp is resetting. How did you fix the resetting issue? Everything else is working well ( except the heating but I am using forced colling and its ok ).
Thanks
  Reply With Quote
Old 1st February 2018, 10:38 PM   #93
nigelwright7557 is offline nigelwright7557  United Kingdom
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
I found I had to spend a bit of time getting over current detect circuits to work at high powers. Increase the resistors to get a higher over current detect limit. See datasheet for resistor values.
I also found driving mosfets with high gate capacitance needed low value gate resistors, as low as 4r7. I found I could get away with 10r if I used gate driver buffers.

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
__________________
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk

Last edited by nigelwright7557; 1st February 2018 at 10:46 PM.
  Reply With Quote
Old 7th February 2018, 03:45 PM   #94
Ivanovv is offline Ivanovv  Macedonia
diyAudio Member
 
Join Date: Sep 2016
Thank you a lot Nigel for this informations but since I am a hobby builder I am kinda lost in a conversation. Can you tell me exactly which component I need to change so I can fix mine. Thanks again for your help
  Reply With Quote
Old 19th February 2018, 12:03 AM   #95
Greg32 is offline Greg32  Australia
diyAudio Member
 
Join Date: Mar 2014
Location: Melbourne
Ivan can you post a picture of your l30d board so we can see which on you have.
  Reply With Quote
Old 20th February 2018, 11:16 AM   #96
Ivanovv is offline Ivanovv  Macedonia
diyAudio Member
 
Join Date: Sep 2016
This is the board
  Reply With Quote
Old 21st February 2018, 10:55 AM   #97
LincolnG is offline LincolnG
diyAudio Member
 
Join Date: Feb 2018
Default What's the difference between l15d-smd and l15d-pro

I actually ordered a pair of L15d-pro kits but was sent the L15d-smd in error. The seller did correct the error and sent the Pro allowing me to keep the smd.

I've tried both, powered on an 500w 50v smps from EBay too.

When looking at these little things you want to try to find a flaw in the sound - but I can't. They seem just as good as my other bi-polar and FET amps, except the power. You can turn the power up and up and up and not a hint of strain in sight.

Today I have these connected to my homebuilt studio monitors based on Monitor Audio drivers. These are 6 ohms with 16cm bass drivers and I have them turned up as loud as I dare.

The smd version sound colder with the top end very transparrent, the pro a little warmer, still crisp - perhaps a little better on bass especially on the lower end.

Despite many searches I cannot find schematics for either of these, however the circuits seem to vary a lot - Can anybody say exactly what are the differences.
  Reply With Quote

Reply


L30D IRS2092 IRFB 4227  IRAUDAMP9 MYDIYHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
IRS 2092 + IRFb 23n20D or? duramadre Class D 9 7th September 2015 07:10 PM
IRS2092 megael9 Car Audio 1 27th July 2015 12:27 PM
resistor 10 ohm for Mosfet 4227 duramadre Class D 1 27th August 2014 10:39 PM
Irs2092 luka Class D 50 15th July 2012 01:48 PM
iraudamp9 problem! Dxvideo Class D 13 5th June 2012 01:10 AM


New To Site? Need Help?

All times are GMT. The time now is 10:04 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki