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ants said:Hi Keith,
Hi Poor mystic,
I hadn't thought of that but it would work. I also have some spare regulators, I bought 6 of them so will have some left over. That is a good idea. Thanks.
keith1200rs said:ants said:Hi Keith,
Hi Poor mystic,
I hadn't thought of that but it would work. I also have some spare regulators, I bought 6 of them so will have some left over. That is a good idea. Thanks.
Be careful with that approach. It may be OK but regulators generally only source current, not sink it. If something tries to pull up the mid rail point the regulator won't be able to stop it.
Keith
ants said:I'll keep the splitter thought in mind.
I had a look at the TLE2425/6 a while back. They still make them but they are upto around 300mA whereas I need 1A or more.
ants said:Lol. I thought they did power the whole circuit.
Added after 5 minutes:
I mean with my set up i'll be looking to get 1A from the voltage divider to go into the opa548 as a dual supply. I will accommodate any change in the voltages. I'm not exactly sure how the TLE2425 works, I used as my reference as to what to do the page here. It gives an outline to the options for creating a dual supply from a single one.
https://tangentsoft.net/elec/vgrounds.html
keith1200rs said:I'm confused. Your original problem was to create a virtual ground from a couple of resistors for the OPA548. The TI devices should easily do that. The supply current for the OP548 should still be coming from the switching regulator in your circuit.
:?
Keith.
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