Selfoscillating class D amplifier - Page 21 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

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
Thread Tools Search this Thread
Old 18th March 2010, 04:56 PM   #201
vogor is offline vogor  Russian Federation
diyAudio Member
vogor's Avatar
Join Date: Jun 2009
Location: Irkutsk
Originally Posted by 81bas View Post
It is needed to play on R4 and R2. But 35-40V threshold is OK too, I think...
  Reply With Quote
Old 31st July 2010, 06:32 PM   #202
opor is offline opor  Thailand
diyAudio Member
Join Date: Nov 2005
Originally Posted by ionutzxpo View Post
thank's AP2, like this?
How about sound quality compare to IRS2092 based amp?
  Reply With Quote
Old 31st July 2010, 06:35 PM   #203
opor is offline opor  Thailand
diyAudio Member
Join Date: Nov 2005
I mean this compare to IRS2092 based amp.
Attached Images
File Type: jpg D2.jpg (162.1 KB, 539 views)
  Reply With Quote
Old 31st July 2010, 06:59 PM   #204
AP2 is offline AP2  Italy
Join Date: Dec 2009
Location: Italy
it is good for start D class,to learn about the various problems.
I do not like IRS2092 amplifier and this scheme is too slow for my taste.
certain works.

  Reply With Quote
Old 1st August 2010, 03:56 AM   #205
diyAudio Member
Join Date: Jan 2008
Location: Calgary
i never tried aCD 4070, but a CD4049 gives outstanding results as a comparator
I get 1.3mhz self oscillation
  Reply With Quote
Old 5th June 2011, 01:29 PM   #206
opor is offline opor  Thailand
diyAudio Member
Join Date: Nov 2005
Originally Posted by 81bas View Post
This is why the startup circuit on T2 was here

Measure a voltage on C13 when the amp is 'not working' (before giving input signal). If it is less than 8-10 volts, then it is needed to reduce the resistor between Vb and +65V. Also, if the resistor is too small, then it can produce too high voltage on C13 and damage the driver. To be safe, simply put a 15V Zener diode (стабилитрон) parallel to C13.

Also, if this will not help, then it will be needed to insert delayed SD signal for IR2110.
Hi ,I have try as your suggestion . But there is 15VDC offset on out output also and amp did not start. Why?
  Reply With Quote


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
Class D Vs Class I (Balanced Current Amplifier) rmsaudio Class D 29 26th January 2014 10:25 PM
My first class A amplifier meanman1964 Pass Labs 42 15th February 2008 07:32 AM
Selfoscillating HalfBridge 500W+500W by IR. Interested? deflorator Class D 0 10th October 2004 03:30 PM
Questions about how to decrease the PASS A-40 amplifier into a class AB amplifier. novtango Pass Labs 2 21st October 2002 01:50 AM

New To Site? Need Help?

All times are GMT. The time now is 11:58 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2