Abstract: This document discusses, among other things, apparatus and methods for restarting an electronic device configured to receive power from a main power supply and an auxiliary power supply. The electronic device includes a reset circuit a reset circuit configured to provide a first signal indicative of an electronic device failure, and an isolation circuit configured to isolate the main power supply from the auxiliary power supply in response to the first signal so that power is supplied to the reset circuit by the auxiliary power supply. The reset circuit can be configured to generate a reset signal for restarting the electronic device with the power supplied by the auxiliary power supply.

Abstract: A port controller includes an advertise block configured to determine a cable assembly coupled to the port controller is not compliant with a standard used by the port controller, a comparator configured to determine a current drawn from a power converter coupled to the cable assembly exceeds a capability of the power converter based on comparing a bus voltage to a threshold voltage, and a protection block configured to, in response to determining the current drawn from the power converter exceeds the capability of the power converter, cause the current drawn from the power converter to be reduced.

Abstract: A port controller includes an advertise block configured to determine a cable assembly coupled to the port controller is not compliant with a standard used by the port controller, a comparator configured to determine a current drawn from a power converter coupled to the cable assembly exceeds a capability of the power converter based on comparing a bus voltage to a threshold voltage, and a protection block configured to, in response to determining the current drawn from the power converter exceeds the capability of the power converter, cause the current drawn from the power converter to be reduced.

Abstract: This document discusses, among other things, apparatus and methods for restarting an electronic device configured to receive power from a main power supply and an auxiliary power supply. The electronic device includes a reset circuit a reset circuit configured to provide a first signal indicative of an electronic device failure, and an isolation circuit configured to isolate the main power supply from the auxiliary power supply in response to the first signal so that power is supplied to the reset circuit by the auxiliary power supply. The reset circuit can be configured to generate a reset signal for restarting the electronic device with the power supplied by the auxiliary power supply.

Abstract: Fuse driver circuits, fuse driver testing circuitry, and methods for testing the fuse driver circuits using the testing circuitry are described. In some embodiments, the fuse driver circuit can be made using a fuse, a NMOS transistor, and a PMOS transistor. The drain of the NMOS transistor can be connected to the negative end of the fuse. The source of the NMOS transistor can be connected to ground. The drain of the PMOS transistor can be connected to a positive end of the fuse. The NMOS and PMOS transistors provide enhanced robustness to the fuse driver circuit in both undervoltage and overvoltage conditions. Other embodiments are also described.

Abstract: Fuse driver circuits, fuse driver testing circuitry, and methods for testing the fuse driver circuits using the testing circuitry are described. In some embodiments, the fuse driver circuit can be made using a fuse, a NMOS transistor, and a PMOS transistor. The drain of the NMOS transistor can be connected to the negative end of the fuse. The source of the NMOS transistor can be connected to ground. The drain of the PMOS transistor can be connected to a positive end of the fuse. The NMOS and PMOS transistors provide enhanced robustness to the fuse driver circuit in both undervoltage and overvoltage conditions. Other embodiments are also described.