L165 for Bipolar Supply

[FireAce]

Greetings fellows

Attached is a circuit I found online using an L165 to create Bipolar power supply. Did a quick test with about 30v DC regulated power supply.
Getting about 7v on the + side and 18v on the - side, and an L165 that gets hot very quickly.

Is this one of those wild circuits that somebody threw out and never tried?

I omitted the caps in my circuit, they are on order, could that be the problem?

Thanks fellers

 

[atferrari]

You have not even built the full circuit. Do it, check how it works and then post.

 

[KMoffett]

...
Is this one of those wild circuits that somebody threw out and never tried?
...

https://www.st.com/internet/analog/product/63132.jsp

Check "Figure 13" in the L165 datasheet.

Also, if you Google "L165", you will get the images of several versions of that split supply.

Ken

 

[KeepItSimpleStupid]

There is a specific IC that implements this called a "rail Splitter".

See: https://www.digikey.com/product-search/en?x=0&y=0&lang=en&site=us&KeyWords=rail+splitter In general the current is limited.

All your doing is creating an artificial ground 1/2 way between Vin.

 

[FireAce]

Are you linking me to what your saying is a better circuit? I like the 3 amp output of the one I posted, still waiting on Caps to fully test it.

Thanks

 

[KeepItSimpleStupid]

Not necessarily. The technology is sound. Your OP amps is probably oscillating without the caps and/or you need bypass caps on the power pins.

 

[dr pepper]

Without any compensation or decoupling caps your circuit will probably oscillate, put the caps on and try again, get the caps close to the chip.