A few Q's about split rail power supply

Thread Starter

prometei

Joined Apr 13, 2008
74
hi,

I've seen a few diagrams on the net on how to get virtual ground, one example was with the two 9V batteries.:



Would it be possible to replace those batteries with two DC/DC buck converter modules (potentially needing to modify the circuit), e.g. based on the LM2596 IC?



2. Are there 1 to 1 transformers with a center tap? I have a few 220V AC/AC transformers with 16V 1A output, was wondering if I could use one of the above described transformers to get a split supply.

3. I have a 7660 voltage converter chip, but it can only supply 10mA on the output. Not sure if I could connect some power transistors to it to increase the output capacity?

4. Is an op-amp+transistor solution a better alternative, e.g.: http://www.redcircuits.com/Page114.htm

thanks!
 

MikeML

Joined Oct 2, 2009
5,444
The 2596 is not an isolated-output converter (the 0V line goes straight through), so cannot be used as you suggest.
 

PeterCoxSmith

Joined Feb 23, 2015
148
hi,

I've seen a few diagrams on the net on how to get virtual ground, one example was with the two 9V batteries.:



Would it be possible to replace those batteries with two DC/DC buck converter modules (potentially needing to modify the circuit), e.g. based on the LM2596 IC?



2. Are there 1 to 1 transformers with a center tap? I have a few 220V AC/AC transformers with 16V 1A output, was wondering if I could use one of the above described transformers to get a split supply.

3. I have a 7660 voltage converter chip, but it can only supply 10mA on the output. Not sure if I could connect some power transistors to it to increase the output capacity?

4. Is an op-amp+transistor solution a better alternative, e.g.: http://www.redcircuits.com/Page114.htm

thanks!
TI rail splitters are pretty good, I've used them...http://www.ti.com/product/tle2426

Peter
 
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