Class D Amp with LM566,LM393 and 2XIRF530 - Page 26 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

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
Reply
 
Thread Tools Search this Thread
Old 10th January 2013, 11:56 PM   #251
abetir is offline abetir  Philippines
diyAudio Member
 
Join Date: Nov 2010
Location: Easternmost Region V
IRSound,

...had a glimpse of your pcb lay-out and comparing it with Apex's guess I found some errors, check them out. Red line means "cut" and Green lines means connect.

TY!
Attached Images
File Type: png D200-V.0.png (154.4 KB, 811 views)
  Reply With Quote
Old 11th January 2013, 01:27 AM   #252
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
[es] - Galerija: Mile Slavkovi?, APEX-audio
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 11th January 2013, 01:38 AM   #253
IRSound is offline IRSound  Germany
diyAudio Member
 
Join Date: Feb 2012
Hi abetir,
Thanks , i've just checked them.

but their are correct , re check them carefully. because i change some component direction or their place.

1-that 10Kohm resistor is for start-up mute.value is correct.
2-input pin of 78L05 should connected to +12v and 100nf cap.it's correct.
3-collector pin of 2n5401 connected to a 1K resistor. after resistor it should be connect to 4 places : 1-10pF cap 2-6K8 resistor 3-anode of 4148 4-pin 12 of 74HC00 , so all of them connected in correct point in my board.

Voltages are almost ok (+/-5v and +12v) , but that waves show something which i can't understand it.

Regards

Last edited by IRSound; 11th January 2013 at 01:41 AM.
  Reply With Quote
Old 11th January 2013, 02:27 AM   #254
abetir is offline abetir  Philippines
diyAudio Member
 
Join Date: Nov 2010
Location: Easternmost Region V
Hi IRSound,

Yes, good to know that they were all connected properly, I was also confused at first glance... always happen when you don't have the schematic in hand...

Regards!
  Reply With Quote
Old 11th January 2013, 05:24 AM   #255
wiljj78 is offline wiljj78  Philippines
diyAudio Member
 
wiljj78's Avatar
 
Join Date: Mar 2012
Location: Bahrain
Quote:
Originally Posted by IRSound View Post
Hi Mile,

I design new board , because i want to change some footprints or change some capacitors to smd type...

after finishing assembly , i connect +/-44v supply and 1KHz sine wave from PC to input. but measured waves aren't familiar to me. i think my board have some problem..but i check it lots of times..i can't find it..

i attached measured waves , also a picture of my amp and layout. after extract Zip file , please read that notepad file.

please help me mile..

Regards,
IRSound

Please check this, i hope this can help.
IR2110 (pin#2),100n, 10uf and 47uf must connected to ground of 78L05 transistor not in -75 rail.

Regards,
Attached Images
File Type: png D200-V_2.png (151.5 KB, 761 views)

Last edited by wiljj78; 11th January 2013 at 05:32 AM.
  Reply With Quote
Old 11th January 2013, 11:05 AM   #256
IRSound is offline IRSound  Germany
diyAudio Member
 
Join Date: Feb 2012
Hi Wiljj ,

Thanks for helping..
- Pin 2 of 2110 should be connected to low side mosfet source pin (or -75v) like apex pcb. but there is just a small difference in routing.also ground pin of 78L05 should be connected to -75v rail. (like apex schematics via jumpers). so my board is correct in this ways.

does anyone knows anything about waves ? (which i attached them in previous page)
i also connect 33uh filter , i have 165khz sine wave with no input !!

Regards
  Reply With Quote
Old 11th January 2013, 12:42 PM   #257
wiljj78 is offline wiljj78  Philippines
diyAudio Member
 
wiljj78's Avatar
 
Join Date: Mar 2012
Location: Bahrain
Quote:
Originally Posted by IRSound View Post
Hi Wiljj ,

Thanks for helping..
- Pin 2 of 2110 should be connected to low side mosfet source pin (or -75v) like apex pcb. but there is just a small difference in routing.also ground pin of 78L05 should be connected to -75v rail. (like apex schematics via jumpers). so my board is correct in this ways.

does anyone knows anything about waves ? (which i attached them in previous page)
i also connect 33uh filter , i have 165khz sine wave with no input !!

Regards
You're right, i just notice lately when i compare the component guide vs. PCB that there some difference of tract routing after the PCB was posted, my mistake, pls. ignore my post.

All the best.
Wiljj78
,
Attached Images
File Type: jpg APEX D200 Component Guide.jpg (251.1 KB, 691 views)
File Type: jpg APEX D200 PCB.jpg (200.9 KB, 636 views)
  Reply With Quote
Old 12th January 2013, 09:25 AM   #258
manojtm is offline manojtm  India
diyAudio Member
 
manojtm's Avatar
 
Join Date: Aug 2008
Hi mile,

mackie SRM450 shematic shows one inverting buffer amp was provided in input. Without this your amp(D200 and others IRS900 etc.. ) out put is 180 degree out phase. Did you check this??

Regards
MANOJ
  Reply With Quote
Old 12th January 2013, 10:35 AM   #259
IRSound is offline IRSound  Germany
diyAudio Member
 
Join Date: Feb 2012
Quote:
mackie SRM450 shematic shows one inverting buffer amp was provided in input. Without this your amp(D200 and others IRS900 etc.. ) out put is 180 degree out phase. Did you check this??
Hi Manoj,
i attached a mixed schematic of previous pages..D200 schematic should be something like this , also it have some zener diode based supply for +/-5 and 12v.

did you see my attached files of first test ? what you think ?

Regards
Attached Images
File Type: png D200-SCH-1.png (99.9 KB, 648 views)
  Reply With Quote
Old 12th January 2013, 11:28 AM   #260
manojtm is offline manojtm  India
diyAudio Member
 
manojtm's Avatar
 
Join Date: Aug 2008
Hi IR,

pls check IR2110 pins correct or not(picture shows some mistake)

all rounded marks are connected to -ve supply rail
Remove R17 and R7 . Use 2W for R175

Regards
MANOJ
Attached Images
File Type: png D200-SCH-1.png (95.2 KB, 468 views)

Last edited by manojtm; 12th January 2013 at 11:32 AM.
  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
Configuring an AB class amp to work in pure A class jrme Tubes / Valves 5 23rd February 2010 06:31 PM
Can a Class AB PP amp be said to be operating in Class A at low signal levels? ray_moth Tubes / Valves 19 23rd January 2009 07:52 PM
why p-p amp RL for class B is 1/2 the class A load? walter33333 Tubes / Valves 2 12th February 2008 04:56 PM
Class D amp? Digital amp? or traditional Class A? rockytro Solid State 21 23rd May 2006 12:40 AM


New To Site? Need Help?

All times are GMT. The time now is 03:39 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