The new bypass circuit design uses ideal diode controller with floating gate drive architecture (such as LM74610-Q1) to drive an external MOSFET to emulate an ideal diode as the bypass circuit and make this circuit be independent from other circuits. The floating gate drive architecture can achieve universal input range as gate drive is not with respect to GND. In addition, a unique advantage of this scheme is that the scheme is not referenced to ground and thus has Zero Iq.

The working principle is shown in Figure 3-1 and Figure 3-2. When the PV panel or the solar equipment fails, the bypass circuit works. In cycles, Body diode of external MOSFET conducts the load current, voltage across body diode is used to build charge pump internally with duty cycle D and then turn on the FET with duty cycle 1-D. When solar panel and solar equipment operate normally, the bypass circuit does not conduct and reverse voltage (VO+ to VO-) appears across cathode to anode of the ideal diode controller.