A semiconductor module includes a photocoupler, a gate driving IC, and a switching element, and at least one of a first structure and a second structure, wherein the first structure is a structure where in a part of a surface of a first lead frame joined to a bottom surface electrode of a light-emitting element, a first conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-emitting element, and the first conductive layer are electrically connected by a wire, and the second structure is a structure where in a part of a surface of a second lead frame joined to a bottom surface electrode of a light-receiving element, a second conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-receiving element, and the second conductive layer are electrically connected by a wire.

A semiconductor module includes a photocoupler, a gate driving IC, and a switching element, and at least one of a first structure and a second structure, wherein the first structure is a structure where in a part of a surface of a first lead frame joined to a bottom surface electrode of a light-emitting element, a first conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-emitting element, and the first conductive layer are electrically connected by a wire, and the second structure is a structure where in a part of a surface of a second lead frame joined to a bottom surface electrode of a light-receiving element, a second conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-receiving element, and the second conductive layer are electrically connected by a wire.

A semiconductor module includes a photocoupler, a gate driving IC, and a switching element, and at least one of a first structure and a second structure, wherein the first structure is a structure where in a part of a surface of a first lead frame joined to a bottom surface electrode of a light-emitting element, a first conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-emitting element, and the first conductive layer are electrically connected by a wire, and the second structure is a structure where in a part of a surface of a second lead frame joined to a bottom surface electrode of a light-receiving element, a second conductive layer is disposed with an insulating layer interposed, and a top surface electrode of the light-receiving element, and the second conductive layer are electrically connected by a wire.

A power conversion device includes a high-side transistor including an IGBT, a low-side transistor including an IGBT, and having a collector coupled to an emitter of the high-side transistor, a high-side driver configured to drive the high-side transistor; and a low-side driver configured to drive the low-side transistor, wherein each of the high-side transistor and the low-side transistor includes a first trench gate electrode arranged in an active cell region, and electrically connected to a gate, and a second trench gate electrode and a third trench gate electrode, each of which is arranged at intervals on both sides of the first trench gate electrode, and electrically connected to the emitter in the active cell region. The high-side driver includes a first pull-up transistor configured to apply a first voltage as a positive voltage to the gate, based on the emitter of the high-side transistor and a first pull-down transistor.

To reduce the number of mounted components in the power conversion device and drive device. Each high-side transistor and low-side transistor has an EGE-type structure of (emitter-gate-emitter type). A high-side driver includes a first pull-up transistor configured to apply a first positive voltage to a gate based on an emitter of the high-side transistor, and a first pull-down transistor configured to couple the gate to the emitter. A low-side driver includes a second pull-up transistor configured to apply a second positive voltage to the gate based on an emitter of the low-side transistor, and a second pull-down transistor configured to couple the gate to the emitter.

A photovoltaic (PV) module safety shutdown system includes a module-on switch coupled with a PV module coupled with an alternating current (AC) mains panel through an inverter. A system monitor couples with the module-on switch and with the AC mains panel and generates a system-on signal. A module discharge switch couples with an inherent capacitance of the inverter and with the system monitor. The module discharge switch discharges the inherent capacitance, by coupling the inherent capacitance with a discharge element, in response to the system monitor not generating the system-on signal. In implementations a module short switch shorts the PV module in response to a passage of a predetermined amount of time after the module discharge switch is switched on. The module-on switch, module discharge switch, and module short switch may be included in a junction box of the PV module and coupled with the system monitor through multiple opto-isolators.

Embodiments of a controller integrated circuit (IC) device for a switched mode power converter and a method of operating a controller IC device of a switched mode power converter are described. In one embodiment, a controller IC device for a switched mode power converter an input/output unit connected to an input/output node of the controller IC device and a controller unit. The input/output unit is configured to receive an input current from the input/output node and output an output voltage through the input/output node in response to an input voltage received at the input/output unit. The controller unit is configured to control voltage regulation of the switched mode power converter in response to the input current received from the input/output unit and generate the input voltage for the input/output unit. Other embodiments are also described.

A phase loss detection device, a compressor including the same, and a phase loss detection method are disclosed. The phase loss detection device may include a signal converting circuit and a processor. The signal converting circuit is configured to convert voltage signals corresponding to respective phases of multiphase alternating current (AC) power monitored from a motor. The processor is configured to receive the converted voltage signals from the signal converting circuit, and configured to calculate, based on the converted voltage signals, one or more phase angles between the respective voltage signals. The processor is configured to determine that phase loss occurs if any one or more of the calculated phase angles deviate from a nominal value of a corresponding phase angle of the multiphase AC power by a value higher than a predetermined threshold. The phase loss detection can be performed in a convenient, effective and reliable way.

A current interruption arrangement for a battery system. The current interruption arrangement includes at least one current interruption unit for interrupting an electrical current flow between a battery of the battery system and a load of the battery. The current interruption unit has at least one power semiconductor for interrupting and establishing the current flow between the battery and the load of the battery, and at least one surge arrester connected in parallel with the power semiconductor.

A photovoltaic (PV) module safety shutdown system includes a module-on switch coupled with a PV module coupled with an alternating current (AC) mains panel through an inverter. A system monitor couples with the module-on switch and with the AC mains panel and generates a system-on signal. A module discharge switch couples with an inherent capacitance of the inverter and with the system monitor. The module discharge switch discharges the inherent capacitance, by coupling the inherent capacitance with a discharge element, in response to the system monitor not generating the system-on signal. In implementations a module short switch shorts the PV module in response to a passage of a predetermined amount of time after the module discharge switch is switched on. The module-on switch, module discharge switch, and module short switch may be included in a junction box of the PV module and coupled with the system monitor through multiple opto-isolators.