How does a dual output dc power supply work?

Question

How does a dual output dc power supply work?

Answer 1

It's two power supplies in one box, usually with the outputs connected so that there is a common terminal, and one supply is connected to produce a positive voltage, and the other a negative voltage.

Handy for opamps which usually need two supplies, +15 and -15 volts.

Answer 2

if you are a TP Engine student and looking for help in this section for your project...you are going to fail, because from the answers those 2 helped you is not what you are looking for. They are correct still, but the components arent the ones your teacher is expecting... if u still cant find your answers...good luck with it

Answer 3

Exactly the same as two single-output DC power supplies; but the control potentiometers on one of them  (designated master)  are dual-gang  (stereo).  The other power supply  (designated slave)  has a set of changeover switches allowing it to be controlled either by its own pots  (in "independent" mode), or by the "spare" gangs on the ones in the first power supply  (in "combined" mode).  The outputs are electrically isolated from one another allowing them to be connected in series for more voltage  (or a centre tapping),  parallel for more current, or not at all  (for instance, if you are prototyping a motor controller with a H-bridge, you might want to use one PSU to turn on the gates of the bottom FETs and the other for the gates of the top FETs; they will be the full DC supply voltage apart).