I bought a couple Lambda supplies from Ebay about 3 years ago. They really sounded excellent driving my LM3886 which is of course half of a LM4780.
I am sorry but I dont know of any pcb layout specifically for switched but I also dont think you need a specific layout for switched. I am sure that I didnt need one.
Your switched will need a Plus/Minus/Ground though. Make sure you dont buy one with just Plus and 0V.
Uriah
I am sorry but I dont know of any pcb layout specifically for switched but I also dont think you need a specific layout for switched. I am sure that I didnt need one.
Your switched will need a Plus/Minus/Ground though. Make sure you dont buy one with just Plus and 0V.
Uriah
http://www.national.com/ds/LM/LM4780.pdf
at page 7, Single Supply Application Circuit
isn't this the schematic for an switched supply that has only + and 0v. I'm asking this because I already have a supply with this value, and I plan to use it.
Thanks for your replies
at page 7, Single Supply Application Circuit
isn't this the schematic for an switched supply that has only + and 0v. I'm asking this because I already have a supply with this value, and I plan to use it.
Thanks for your replies
What do you expect to be different in the amp's layout, when you use a different power supply?
as I said my power supply doesn't have +V, -V, and gnd, as I noticed most of the layouts are using. I only have +V and gnd.
In the datasheet the only schematic that has only +V and gnd is the one on page 7, as I said in my earlier post. Is that schematic OK, can I use it ?
http://www.national.com/ds/LM/LM4780.pdf
at page 7, Single Supply Application Circuit
In the datasheet the only schematic that has only +V and gnd is the one on page 7, as I said in my earlier post. Is that schematic OK, can I use it ?
http://www.national.com/ds/LM/LM4780.pdf
at page 7, Single Supply Application Circuit
Make sure to read page 18 for single supply operation. Also, since this is how an amp in a car would have to operate I am betting there is an app note about how to implement it and I also bet that in the car audio section you will find folks who have done what you are talking about already.
Uriah
Uriah
? I want to use it at home...- Status
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