【DIY Project】120W x 3 Channel Class D Amplifier【Let's Make Class D easier 】 - diyAudio
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Old 26th October 2012, 01:23 PM   #1
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Default 【DIY Project】120W x 3 Channel Class D Amplifier【Let's Make Class D easier 】

Hi,DIY members,this is my fisrt thread in this forum,I am ready to start a project of Class D Amplifier,This project is from IRAUDAMP11 but some parts are modified.

There are some reasons for me to carry out this project:
◆ Simply for DIY and make Class D easier.
◆ Class D advantages such as higher efficiency,Higher Performance,smaller package,etc.
◆ 3 Channel Amplifier can make up 2.1 system,or 5.1 system by use 2 boards in real DIY.
◆ More benefits you can find when you practice with me.

The next,i will show you how to DIY this project step by step.

★ The First
You must know the specifications,features of this amplifier,it is simply if you are a
Diyer or Electronic Engineer,please refer to Page 3~4 of IRAUDAMP11.pdf
http://www.irf.com/technical-info/re...iraudamp11.pdf
There are some key parameters:
◆ Output Power
◆ Load Impedance
◆ Supply Voltages
◆ Distortion and Efficiency
◆ Audio Performance
◆ System Protection Features

★ Second
If you are a general Diyer and have nothing experience of Class D,you must refer to the following
design note and study basic theory of Class D.If you are a good Class D diyer,you can skip this step to next.
Class D Amplifier Design Basics.pdf
http://www.irf.com/product-info/audi...sdtutorial.pdf
Class D Amplifier Design Basics 2.pdf
http://www.irf.com/product-info/audi...dtutorial2.pdf

★ Third
After you have know What is a Class D amplifier,the remaining thing is How is a Class D amplifier can be build?
That is mean you need to choose a certain solution,In this project,we will use IRS2053 which extend from IRS2092
but more channel included,compact and functions.If you are familiar with IRS2092 before,it is more easier moving to IRS2053 project.Besides,you can refer to the datasheet and Functional Description for detail explain.
IRS2053 Datasheet.pdf
http://www.irf.com/product-info/data...rs2052mpbf.pdf
IRS2053M Functional Description.pdf
http://www.irf.com/technical-info/appnotes/an-1159.pdf

★ Fourth
So far,congratulations that you have finish the above procedure,and now you will become a good Diyer soon,
The following you need to spend a certain time to understand this project in detail.what?How?and Why?
Please read the reference design note.it will show you all in sequence.
http://www.irf.com/technical-info/re...iraudamp11.pdf

★ Fifth
Assume you understand the circuit design,next we will start PCB Drawing,This is a tedious work and will take a lot of time.here I will show you the 3D view first.
Attached Images
File Type: jpg 3D_Fit.JPG (124.8 KB, 1453 views)
File Type: jpg 3D_Top.JPG (137.3 KB, 1427 views)
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Old 29th October 2012, 02:03 PM   #2
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I'm very disappointed when browsed my thread once again,there is no one reply to this thread.pluzzle that whether these ones(Diyer or not) here don't like to take your interset to study Class D theory?Or prefer to buy amplifier module to setup and test by yourself?

I am a new member of this frums,but i found that some thread about application questions are very simple that can be solve through datasheet or app notes if you have pay attention to these basic theory.

But in any case,i just show you the way to practice this project with me,if you are interseted in this project and have question,please show me and i will try my best to help you.
Today i test the amplifier board,it works very well and sounds perfect.
here upload some picture,please refer attanchment.

More pictures and design note are in progress~~~
Attached Images
File Type: jpg 11 - Description_1.JPG (197.2 KB, 1294 views)
File Type: jpg 17 - Board Height_3_.JPG (148.4 KB, 1247 views)
File Type: jpg 27 - IRS2053 Chip.JPG (216.6 KB, 1226 views)
File Type: jpg 2 - Test 2_????.JPG (295.7 KB, 489 views)

Last edited by airwavesystem; 29th October 2012 at 02:07 PM. Reason: upload picture
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Old 29th October 2012, 05:12 PM   #3
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Location: Munich
Hi Airwave,
this is looking like a very nice DIY-version of the IRAUD11.

Don't be frustrated that nobody is replying.
It is hard to get attention.
Most guys of the classD community are in one of the following categories.
a) Limiting the DIY risk and looking to buy a well regarded module
b) Looking for Gerber files and/or group buys and/or group builds of proven designs
c) Heading for multiple kW for lowest possible cost
d) Working on own designs, interested in the very detail of switching and/or performance (most preferred including measurements on the real thing) and/or details of working principles

....chose the category (or multiple categories) you want to address and offer your solution on the 'sleep killer topics' of the concerned category.
Good luck and wishing you a busy thread.
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Old 29th October 2012, 06:40 PM   #4
Trebla is offline Trebla  United Kingdom
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Quote:
Originally Posted by airwavesystem View Post
I'm very disappointed when browsed my thread once again,there is no one reply to this thread.
I'm interested and fairly sure others will be too.
But perhaps, like me they were waiting for something to happen.
Also remember that not everyone is browsing on here continuously.

Looking forward to it, carry on with the good work.
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Old 30th October 2012, 07:36 AM   #5
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Quote:
Originally Posted by ChocoHolic View Post
Working on own designs, interested in the very detail of switching and/or performance (most preferred including measurements on the real thing) and/or details of working principles.

Click the image to open in full size.
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Old 30th October 2012, 07:37 AM   #6
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Quote:
Originally Posted by airwavesystem View Post
I'm very disappointed when browsed my thread once again,there is no one reply to this thread.pluzzle that whether these ones(Diyer or not) here don't like to take your interset to study Class D theory?Or prefer to buy amplifier module to setup and test by yourself?
Exercise patience, your work is clean enough to attract visitors, put some more pics, preferably measurements.
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Old 30th October 2012, 08:32 AM   #7
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Quote:
Originally Posted by Workhorse View Post
Click the image to open in full size.

Exactly. ...cooking again my personal chocolate these days. Refinement for Toblerone-Level in progress...
But let's not spoil Airwave's thread with to much off topic.
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Old 11th November 2012, 10:55 AM   #8
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Join Date: Oct 2012
Hi,Dear DIYer,I am busy these days for test and verify this board,
Now I have a good news to announce,that is this board have a good performance.
The most obvious is Output Power is larger that IRAUDAMP11,test data as following.

[mark]
1.Test Conditions: Supply 35V,4Ω Resistive Load, 1KHz Reference Frequency
2.Testing instrument:ATS-1(AP)
3.Power source:SMPS Module
4.Performance(THD+N)will be better if use Transformer Supply
Attached Images
File Type: jpg Test data_excel.JPG (89.1 KB, 84 views)
File Type: jpg Output Power_1W.jpg (108.1 KB, 167 views)
File Type: jpg Output Power_10W.jpg (105.2 KB, 145 views)
File Type: jpg Output Power_40W.jpg (95.5 KB, 49 views)
File Type: jpg Output Power_80W.jpg (103.5 KB, 44 views)
File Type: jpg Output Power_120W.jpg (99.6 KB, 47 views)
File Type: jpg Output Power_THD_1%_158W.jpg (96.4 KB, 47 views)
File Type: jpg Output Power_THD_10%_195W.jpg (100.6 KB, 79 views)

Last edited by airwavesystem; 11th November 2012 at 11:02 AM. Reason: updata
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Old 16th November 2012, 07:25 AM   #9
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Default Looking good!

Keep up the good work!

I am one of those people not able to design an amp myself! So I just build 3 L15D units in a box to get the same principle.

Building a 3 channel IRS 2092 type amp is a very logical step and I like your compact and clean setup.

Peter
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Old 18th November 2012, 01:01 AM   #10
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Quote:
Originally Posted by peterhenk View Post
Keep up the good work!

I am one of those people not able to design an amp myself! So I just build 3 L15D units in a box to get the same principle.

Building a 3 channel IRS 2092 type amp is a very logical step and I like your compact and clean setup.

Peter
HI,peterhenk
thanks your reply that Makes me feel more hopeful in this forums.
Now i have finish some part of this board's user manual except the design application,here i updata and share with you-all.

But i will not make this design application to the public due to Commercial patent,only these diyer who get or buy this board can obtain this full version manual.

Last edited by airwavesystem; 18th November 2012 at 01:04 AM. Reason: UPDATA
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