Re: How to utilize the inverted (+/-) oput of buck-boost con
Yes, you can do this and there are even ICs that will let you control the circuit.
The one that I know for sure is to use a buck followed by a boost in a configuration
sometimes known as a buck+boost (as opposed to buck-boost). The configuration
is simplified to the one shown in Figure 2 in the attached file.
This topology uses 2 diodes and 2 switches. But depending on if you are in buck mode or boost mode, only one of the switches is being pulse-width modulated. The other switch would be off or on depending on the mode.
I hope this helps you out.
Best regards,
v_c