Superb Power Amplifier using TDA7250

This 2-channel hybrid IC is normally configured with TIP142/147 power darlingtons for its' output. For those who prefer to use power transistors instead, the TDA7250 can easily be converted. All that is required are a few transistors, 4 additional resistors and some rewiring.

This conversion centers mainly on changing the output section to a Sziklai.

Sziklai Output

In our IA502 on the right, drivers Q1,Q2 are 2SC2238 and 2SA968, and outputs Q5,Q6 are 2SA1216 and 2SC2922 respectively.

No instability problems were encountered from this conversion. After a period of run-in, the amplifier remained thermally stable.

Is this version worth the extra cost and effort?

If one is only interested in something basic, the TIP version would be sufficient. But if one is after sonic performance, I would recommend this version.

http://www.ampslab.com/Images/ia502/tda7250cfp_schemahires.gif

http://www.ampslab.com/Images/ia502/tda7250cfp_components.gif

2SC2922/2SA1216 hardwired

the TDA7250 ic

0 comments:

Post a Comment

User Agreement

The creator of THIS PAGE or the ISP(s) hosting any content on this site take NO responsibility for the way you use the information provided on this site. These circuits here are for educational purposes only and SHOULD BE VIEWED ONLY. If you download any files to view them, you are agreeing to delete them within a 24 hour period. If you are affiliated with any government, or ANTI-Piracy group or any other related group or were formally a worker of one you CANNOT enter this web site, cannot access any of its files and you cannot view any of the HTML files. All the objects on this site are PRIVATE property and are meant for previewing only. If you enter this site without following these agreements you are not agreeing to these terms and you are violating code 431.322.12 of the Internet Privacy Act signed by Bill Clinton in 1995 and that means that you CANNOT threaten our ISP(s) or any person(s) or company storing these files, cannot prosecute any person(s) affiliated with this page which includes family, friends or individuals who run or enter this web site. IF YOU DO NOT AGREE TO THESE TERMS THEN LEAVE.

Disclaimer

All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we use are obtained in a legal manner and the webmasters are aware of the links listed on the search engines. If you find a URL that belongs to you, and you did not realize that it was "open to the public", please use the report button to notify the blogmaster of your request to remove it. This is not an invitation for webblog haters to spam with requests to remove content they feel that is objectionable and or unacceptable. Proof of URL ownership is required.
NOTICE: This Blog Has Already Been Reviewed And Accepted By Blogger.com