|Chip Amps Amplifiers based on integrated circuits|
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|24th April 2011, 03:37 PM||#2|
Join Date: May 2002
Location: Great City of Turnhout, Belgium
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It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts - Sherlock Holmes Check out Linear Audio Vol 5!
|26th April 2011, 06:41 AM||#4|
Join Date: Nov 2006
Blog Entries: 1
Here are some basics about power supplies:
Unregulated Power Supply Design
The short thread linked below should have everything else you need, in order to understand a simple power supply:
Does a LM317 act like a transformer
You will need a dual-polarity power supply, i.e. both a positive and a negative power supply, to run most chipamp chips. Here is one:
LM338 regulated snubberized PSU for audio amplifiers (but remove the short across the secondary of T2 in the diagram)
You could, instead, use an unregulated power supply, which would be simpler.
Also look to post #68 of that thread, to get an amplifier circuit. Make two of them.
Go to National.com and download the LM3886 datasheet to find the pin numbers that correspond to the connections in the diagram.
Parts can be purchasd from mouser.com, digikey.com, and many other places on line.
Do some more reading, here, first.
Last edited by gootee; 26th April 2011 at 06:46 AM.
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