System including an ideal diode circuit for negative transient protection

A circuit in a vehicle electronic control unit (ECU), comprising:

• a battery that includes a battery line configured to supply voltage to the circuit that is connected to a load side including at least a capacitor;
• a metal-oxide-semiconductor field effect transistor (MOSFET);
• an inductor in series with the MOSFET, wherein the inductor is in series with a first channel of the MOSFET;
• a transistor in series with the inductor, wherein an emitter channel of the transistor is connected with the inductor and a base of the transistor is connected to a second channel of the MOSFET;
• and
• a diode connected to the second channel of the MOSFET and the base of the transistor
• wherein in response to the transistor and the diode detecting a difference in voltage during a negative transient duration, the transistor is configured to turn off the MOSFET and the inductor is configured to generate an additional response time to the circuit for the capacitor on the load side of the circuit to supply current to the load side, during the negative transient duration wherein the circuit does not have negative voltage or current during the negative transient duration.

A method of providing a circuit in a vehicle electronic control unit (ECU), comprising:

• supplying voltage to the circuit utilizing a battery and a battery line, wherein the battery line is connected to a load side including at least a capacitor;
• providing a metal-oxide-semiconductor field effect transistor (MOSFET) within the circuit;
• providing an inductor in series with a first channel of the MOSFET;
• providing a transistor in series with the inductor, wherein an emitter channel of the transistor is connected with the inductor and a base of the transistor is connected to a second channel of the MOSFET;
• connecting a diode to both a third channel of the MOSFET and the base of the transistor;
• turning off the MOSFET in response to the transistor and the diode detecting a difference in voltage during a negative transient duration;
• and
• generating, in response to the MOSFET turning off, an additional response time, during the negative transient duration, to the circuit via the inductor and supplying current to the capacitor on the load side of the circuit via the inductor, wherein the circuit does not have negative voltage or current during the negative transient duration.