Method for checking the switch-off capability of a mosfet
AssigneeContinental Automotive Technologies GmbH
InventorsErwin Kessler, Christian Gil
Life of this patent
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Abstract
Disclosed is a method for checking the turn-off capability of an electronic fuse in the form of a MOSFET, said electronic fuse being used as an interrupter switch between a voltage supply and a control device, wherein the MOSFET is turned on during operation as intended and is operated in the linear region, wherein, for checking the turn-off capability, the gate-source voltage of the MOSFET is reduced by a predefined value until a predefined threshold value is reached and, after the threshold value has been reached, the gate-source voltage is increased again to the previous value for turning on the MOSFET, and wherein a check is made to ascertain whether the drain-source voltage of the MOSFET increases as the gate-source voltage is reduced.
Claims4
A method for checking the turn-off capability of an electronic fuse in the form of a MOSFET, said electronic fuse being used as an interrupter switch between a voltage supply and a control device, comprising:
- turning on the MOSFET during operation as intended,
- operating the MOSFET in the linear region,
- reducing the gate-source voltage of the MOSFET by a predefined value until a predefined threshold value is reached,
- after the threshold value has been reached, increasing the gate-source voltage to a previous value for turning on the MOSFET, and
- ascertaining whether the drain-source voltage of the MOSFET increases as the gate-source voltage is reduced.
Dependencies are inferred from the claim text.