Figure 7. Two quadrant SEPIC converter in Reverse direction (right to left) as combination of a Buck-Boost (right box part) and lift circuit (left box part)

From

A New Single Source Topology Four Quadrant DC-DC SEPIC Converter

Md. Maidul Islam, Md. Aman Khan, Mohammad Ali Choudhury

American Journal of Electrical and Electronic Engineering. 2016, 4(5), 131-138 doi:10.12691/ajeee-4-5-2