An embodiment circuit comprises high-side and low-side switches arranged between supply and reference nodes, and having an intermediate node. A switching control signal is applied with opposite polarities to the high-side and low-side switches. An inductive load is coupled between the intermediate node and one of the supply and reference nodes. Current sensing circuitry is configured to sample a first value of the load current flowing in one of the high-side and low-side switches before a commutation of the switching control signal, sample a second value of the load current flowing in the other of the high-side and low-side switches after the commutation of the switching control signal, sample a third value of the load current flowing in the other of the high-side and low-side switches after the second sampling, and generate a failure signal as a function of the first, second and third sampled values of the load current.

A power module and a manufacturing method thereof are disclosed. The power module includes a magnetic component, a bare power chip and a conductive set. The magnetic component includes a first surface and a second surface opposite to each other. The bare power chip is disposed on the magnetic component and includes a third surface and a fourth surface opposite to each other. The conductive set is disposed on the magnetic component and electrically connected with the magnetic component and the bare power chip. The third or fourth surface of the bare power chip is at least partially attached on the first or second surface of the magnetic component, and at least partially included in a projected envelopment of the corresponding first or second surface of the magnetic component, so as to facilitate the magnetic component to support the bare power chip.

In a drive system and method for operating a drive system, in which the drive systems includes an electromagnetically operable brake, an electric motor, e.g., a three-phase motor, and an electronic circuit, the brake has an energizable coil, e.g., a brake coil, the electronic circuit has a rectifier, an upper controllable semiconductor switch, a freewheeling diode, and a varistor, a direct voltage provided by a rectifier is able to be made available by closing or by a pulse-width-modulated actuation of an upper controllable semiconductor switch of the coil, and by opening the upper controllable semiconductor switch, a current driven by the coil in the de-excitation of the coil is freewheeling and/or flowing through the freewheeling diode and the varistor or through a component connected in parallel with the varistor.

In a drive system and method for operating a drive system, in which the drive systems includes an electromagnetically operable brake, an electric motor, e.g., a three-phase motor, and an electronic circuit, the brake has an energizable coil, e.g., a brake coil, the electronic circuit has a rectifier, an upper controllable semiconductor switch, a freewheeling diode, and a varistor, a direct voltage provided by a rectifier is able to be made available by closing or by a pulse-width-modulated actuation of an upper controllable semiconductor switch of the coil, and by opening the upper controllable semiconductor switch, a current driven by the coil in the de-excitation of the coil is freewheeling and/or flowing through the freewheeling diode and the varistor or through a component connected in parallel with the varistor.

A direct drive system for providing RF power to a component of a substrate processing system includes a direct drive circuit including a switch and configured to supply RF power to the component. A switch protection module is configured to monitor a load current and a load voltage in a processing chamber, calculate load resistance based on the load current and the load voltage, compare the load resistance to a first predetermined load resistance, and adjust at least one of an RF power limit and an RF current limit of the direct drive circuit based on the comparison.

A DC-DC converter includes an output-side storage capacitor arrangement which has a parallel circuit formed of an electrolytic capacitor, a ceramic capacitor and a circuit arrangement. The circuit arrangement has a series circuit formed of a hybrid electrolytic capacitor and a suppressor diode as well as a resistance connected in parallel with the hybrid electrolytic capacitor.

A load drive circuit includes a power source terminal (“PST”), a power source and a load terminal connecting a load to the power source. A semiconductor switch connects the PST to the load terminal. A control circuit includes an output terminal for opening/closing the semiconductor switch. A freewheeling circuit includes a freewheeling diode and a protection switch blocks a current from the power source to the semiconductor switch when the power source is connected in a reverse manner. A first terminal connects the control circuit to a first fixed potential and a second terminal connects an anode of the freewheeling diode to a second fixed potential. A connection circuit includes a connection switch connecting the output terminal and the first terminal. The connection circuit connects the output terminal to the first terminal when a rise in a potential difference between the first terminal and the second terminal is detected.

A resonant power supply, a primary-side feedback excitation power supply controller, a method, and a control apparatus are disclosed. In the resonant power supply, a bridge circuit is electrically connected to a power supply. The bridge circuit is configured to convert, based on a drive signal, a direct current provided by the power supply into a square wave signal. An LC series resonant network is electrically connected to the bridge circuit and a primary-side winding. The LC series resonant network is configured to convert the square wave signal into an alternating current, and output the alternating current to the primary-side winding. The alternating current includes an input voltage Vt and an input current I.sub.r.

A latch system includes a releasably secured latch or keeper and a solenoid assembly. The solenoid assembly has a solenoid driver coupled to a power supply, a switching circuit connected with the solenoid driver, and a function generator to selectively adjust a frequency of a pick current output from the power supply and provided to the solenoid driver. The frequency is adjusted until the pick current induces a resulting vibration of said latch system sufficient to free a preloaded latch or keeper. The adjusted frequency may be a target frequency or a range of frequencies. Also included may be a preload sensor. When a preload is sensed, the frequency may be adjusted by the function generator until the pick current induces a resulting vibration of said latch system sufficient to free a preloaded latch or keeper.

A power module and a manufacturing method thereof are disclosed. The power module includes a magnetic component, a bare power chip and a conductive set. The magnetic component includes a first surface and a second surface opposite to each other. The bare power chip is disposed on the magnetic component and includes a third surface and a fourth surface opposite to each other. The conductive set is disposed on the magnetic component and electrically connected with the magnetic component and the bare power chip. The third or fourth surface of the bare power chip is at least partially attached on the first or second surface of the magnetic component, and at least partially included in a projected envelopment of the corresponding first or second surface of the magnetic component, so as to facilitate the magnetic component to support the bare power chip.