A compound control circuit comprises an input end, a light-load signal processing circuit, a slow response circuit and a fast response circuit. The compound control circuit is mainly used as an additional circuit of a work control chip, so that although the work control chip only has a single overcurrent protection level, a compound function control of fast and slow speed, high and low level current protection and light-load signal stabilization can be generated through the compound control circuit, so as to meet the complex application environment and compatible requirements of the current power supply.

A compound control circuit comprises an input end, a light-load signal processing circuit, a slow response circuit and a fast response circuit. The compound control circuit is mainly used as an additional circuit of a work control chip, so that although the work control chip only has a single overcurrent protection level, a compound function control of fast and slow speed, high and low level current protection and light-load signal stabilization can be generated through the compound control circuit, so as to meet the complex application environment and compatible requirements of the current power supply.

A power interrupter device includes a solid-state bidirectional switch and control circuitry to control the solid-state bidirectional switch. The bidirectional switch is connected between input and output terminals of the power interrupter device. The control circuitry includes driver circuitry and fault detection circuitry. The driver circuitry generates a regulated direct current (DC) voltage using current drawn from an input power source applied to the input terminal and applies the regulated DC voltage to a control input of the bidirectional switch. The fault detection circuitry is configured to sense a level of load current flowing in an electrical path between the input and output terminals, to detect an occurrence of a fault condition based on the sensed load current level, and to short the control input of the bidirectional switch to place the bidirectional switch in a switched-off state, in response to detecting the occurrence of a fault condition.

A power interrupter device includes a solid-state bidirectional switch and control circuitry to control the solid-state bidirectional switch. The bidirectional switch is connected between input and output terminals of the power interrupter device. The control circuitry includes driver circuitry and fault detection circuitry. The driver circuitry generates a regulated direct current (DC) voltage using current drawn from an input power source applied to the input terminal and applies the regulated DC voltage to a control input of the bidirectional switch. The fault detection circuitry is configured to sense a level of load current flowing in an electrical path between the input and output terminals, to detect an occurrence of a fault condition based on the sensed load current level, and to short the control input of the bidirectional switch to place the bidirectional switch in a switched-off state, in response to detecting the occurrence of a fault condition.

A system includes a dry contact with a first pair of switchable electrodes, a wet contact with a second pair of switchable electrodes, an arc suppressor, and a controller circuit operatively coupled to the arc suppressor and the first and second pairs of switchable electrodes. The controller circuit is configured to detect a failure of the wet contact and determine a stick duration associated with the first pair of switchable electrodes. The stick duration is based on a duration between an instance when a coil of the dry contact is deactivated and an instance of separation of the first pair of switchable electrodes during deactivation of the coil. The controller circuit generates, in-situ and in real-time, health assessment for the first pair of switchable electrodes based on a comparison of the determined stick duration with an average stick duration associated with a window of observation.

A system includes a dry contact with a first pair of switchable electrodes, a wet contact with a second pair of switchable electrodes, an arc suppressor, and a controller circuit operatively coupled to the arc suppressor and the first and second pairs of switchable electrodes. The controller circuit is configured to detect a failure of the wet contact and determine a stick duration associated with the first pair of switchable electrodes. The stick duration is based on a duration between an instance when a coil of the dry contact is deactivated and an instance of separation of the first pair of switchable electrodes during deactivation of the coil. The controller circuit generates, in-situ and in real-time, health assessment for the first pair of switchable electrodes based on a comparison of the determined stick duration with an average stick duration associated with a window of observation.

A shoot-through protection circuit includes a current sensor providing a sensor signal connected to a comparator input via at least a burden resistor. A switch protection circuit including a protection input connected to an output of the comparator and a plurality of outputs. Each of the outputs is connected to a corresponding switch in a plurality of stacked switches. Wherein the switch protection circuit is configured to drive each switch of the plurality of stacked switches open in response to a positive output signal from the comparator.

A surge protection system is provided. The surge protection system includes an input capacitor, a surge protection circuit, and a controller. When the input voltage starts to be transmitted to the input capacitor, a surge current is generated. The surge protection circuit includes a first path and a second path. The surge protection circuit is coupled to a second end of the input capacitor via the first path, so that the surge current is transmitted via the first path. The controller is coupled to the surge protection circuit. The controller is configured to provide a control signal to the surge protection circuit to switch the first path to the second path to be coupled to the second end of the input capacitor.

A surge protection system is provided. The surge protection system includes an input capacitor, a surge protection circuit, and a controller. When the input voltage starts to be transmitted to the input capacitor, a surge current is generated. The surge protection circuit includes a first path and a second path. The surge protection circuit is coupled to a second end of the input capacitor via the first path, so that the surge current is transmitted via the first path. The controller is coupled to the surge protection circuit. The controller is configured to provide a control signal to the surge protection circuit to switch the first path to the second path to be coupled to the second end of the input capacitor.

Techniques for enabling multi-pack and component connectivity detection are provided. In some configurations, individual PCMs can test the connectivity between components of a device without the need to operate the components. For example, PCMs configured in accordance with the present disclosure can test the connectivity between a motherboard, a display circuit, a camera, and a number of battery packs without the need to operate the motherboard, display circuit, camera, etc. In some configurations, conductors that are part of cables and connectors used to connect the components can be used to determine the state of one or more connections. When a signal that runs through the conductors meets one or more criteria, the PCMs of a device cause a predetermined delay prior to enabling one or more components. By testing the connectivity between components before each component transitions to an operational state, other problems caused by faulty connections can be mitigated.