The object of the present disclosure is to provide a power semiconductor device capable of miniaturization. According to the present disclosure power semiconductor device includes a semiconductor switching element configured to control a current flowing through a primary coil composing an ignition coil, and a control circuit configured to control drive of the semiconductor switching element, in which the control circuit includes a first constant current source, a first transistor with an output terminal thereof connected to a control terminal of the semiconductor switching element, a resistor with one end thereof connected to a control terminal of the first transistor and an other end thereof connected to the constant current source, a capacitor with one end thereof connected to the control terminal of the first transistor and an other end thereof grounded, and a second transistor with an input terminal thereof connected to the resistor and an output terminal grounded.

The object of the present disclosure is to provide a power semiconductor device capable of miniaturization. According to the present disclosure power semiconductor device includes a semiconductor switching element configured to control a current flowing through a primary coil composing an ignition coil, and a control circuit configured to control drive of the semiconductor switching element, in which the control circuit includes a first constant current source, a first transistor with an output terminal thereof connected to a control terminal of the semiconductor switching element, a resistor with one end thereof connected to a control terminal of the first transistor and an other end thereof connected to the constant current source, a capacitor with one end thereof connected to the control terminal of the first transistor and an other end thereof grounded, and a second transistor with an input terminal thereof connected to the resistor and an output terminal grounded.

The disclosure provides an electronic device including a driver circuit and a driving method thereof. The driver circuit includes an electronic unit, a driver unit, and a detection and protection circuit. The driver unit is electrically connected to the electronic unit. The detection and protection circuit is electrically connected to the electronic unit through a first node, and is electrically connected to a gate terminal of the driver unit through a second node. When a voltage of the first node is pulled down, the detection and protection circuit controls the driver unit to be turned off. The detection and protection circuit of the driver circuit of the disclosure protects the electronic unit from excessive current.

The disclosure provides an electronic device including a driver circuit and a driving method thereof. The driver circuit includes an electronic unit, a driver unit, and a detection and protection circuit. The driver unit is electrically connected to the electronic unit. The detection and protection circuit is electrically connected to the electronic unit through a first node, and is electrically connected to a gate terminal of the driver unit through a second node. When a voltage of the first node is pulled down, the detection and protection circuit controls the driver unit to be turned off. The detection and protection circuit of the driver circuit of the disclosure protects the electronic unit from excessive current.

A power system including a gate driver configured with test circuitry to detect faults is disclosed. The power system may be configured to test the fault detection circuitry in order to confirm its ability to detect faults. Various methods and circuit implementations are disclosed to determine the ability of the system to detect faults. The testing may include different configurations and protocols in order to make conclusions about which components are likely responsible for a failure. These components may include components included in the gate driver or externally coupled to the gate driver. The disclose approach does not significantly add complexity because a test input to initiate a test may be communicated from a low voltage side to a high voltage side over a shared communication channel.

A power system including a gate driver configured with test circuitry to detect faults is disclosed. The power system may be configured to test the fault detection circuitry in order to confirm its ability to detect faults. Various methods and circuit implementations are disclosed to determine the ability of the system to detect faults. The testing may include different configurations and protocols in order to make conclusions about which components are likely responsible for a failure. These components may include components included in the gate driver or externally coupled to the gate driver. The disclose approach does not significantly add complexity because a test input to initiate a test may be communicated from a low voltage side to a high voltage side over a shared communication channel.

The present disclosure provides a rapid shutdown device for a photovoltaic system, which is connected between a photovoltaic power generation module and a photovoltaic inverter and comprises an input port and an output port. The rapid shutdown device further comprises: a first switch and a second switch; a third switch and a fourth switch; a controller coupled to control terminals of the first switch, the third switch, and the fourth switch, and configured to control on and off of the first switch, the third switch, and the fourth switch, so that the rapid shutdown device operates in a normal state, a bypass state or a shutdown state.

The present disclosure provides a rapid shutdown device for a photovoltaic system, which is connected between a photovoltaic power generation module and a photovoltaic inverter and comprises an input port and an output port. The rapid shutdown device further comprises: a first switch and a second switch; a third switch and a fourth switch; a controller coupled to control terminals of the first switch, the third switch, and the fourth switch, and configured to control on and off of the first switch, the third switch, and the fourth switch, so that the rapid shutdown device operates in a normal state, a bypass state or a shutdown state.

A downhole power supply and method for supplying downhole power are disclosed. In some embodiments a downhole power supply includes a source power supply including a supply cable coupled to an electric energy source. The downhole power supply further includes at least one downhole distribution network to which the supply cable is configured to couple the electric energy source. The at least one downhole distribution network includes, multiple load supplies providing regulated power levels to multiple downhole loads and a network controller configured to individually connect and disconnect each of the load supplies in response to a failure within the downhole distribution network.

A downhole power supply and method for supplying downhole power are disclosed. In some embodiments a downhole power supply includes a source power supply including a supply cable coupled to an electric energy source. The downhole power supply further includes at least one downhole distribution network to which the supply cable is configured to couple the electric energy source. The at least one downhole distribution network includes, multiple load supplies providing regulated power levels to multiple downhole loads and a network controller configured to individually connect and disconnect each of the load supplies in response to a failure within the downhole distribution network.