Patent ID: 11937352
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A surge protection method for a MOSFET circuit, wherein the MOSFET circuit comprises:
a first MOSFET comprising a drain connected to an input voltage a gate and a source;
a unidirectional circuit component connected between the source and a gate control node, which gate control node controls the switching of the first MOSFET using the gate; and
a threshold circuit connected between the gate control node and a reference voltage and decoupled from the input voltage,
wherein the method comprises:
performing voltage clamping of the voltage at the gate control node to a clamping voltage level, using the threshold circuit, when the voltage at the source exceeds a threshold voltage level and cause the unidirectional circuit component become conductive in the direction from the source to the gate control node and allow a conductive of the threshold circuit, thereby holding the gate control node at a voltage such as to turn off the first MOSFET.