Figure 3 This diagram shows flyback operation when the power switch is on (left) and off (right). Source: ON Semiconductor Replacing the “free wheeling” diode (Figure 5, left) with a MOSFET (Q2 in ...

The circuit diagram below presents a simplified schematic of the ... significantly higher voltage stress than the SEPIC Fet when this is factored in. The flyback diode peak inverse voltage (PIV) ...