![]() That's it! These chipamps work just fine with a simple unregulated power supply. Then all you need is a fuse, a bridge rectifier (or individual diodes), and two or more big electrolytic capacitors. Just get a transformer with a dual secondary, or a center-tapped secondary, with each secondary having the voltage needed, at a high-enough current. ![]() ![]() And making a split power supply is easy, too. What makes you want to use a single supply, so badly? A split supply is easier. But it's a little more complicated, and might even compromise the sound quality, slightly, by necessitating electrolytic input and output AC-coupling/DC-blocking capacitors.īut yes, the single-supply schematic, in the datasheet, should be perfectly fine (especially if you have a 48v to 52v supply). It says "The typical application of the LM4766 is a split supply amplifier." ![]() See page 16 of the LM4766 datasheet, at **broken link removed**. Plus, it would only give you about 3 Watts per channel. The datasheet shows 20v as the absolute minimum guaranteed-to-work difference between the supply rails. A +/-24v split supply is equivalent to a 48v single supply.Īlso, your original 20v single supply would be worrisome. So it does mean both + *AND* - 24 volts, i.e. The posted graph has "(+/-V)", right after the words "SUPPLY VOLTAGE", in the horizontal axis label.
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