A system including: a first regulator having a first input voltage and a first output voltage; a second regulator having a second input voltage and a second output voltage; a first driver circuit coupled to the first regulator and a switch, wherein the first driver circuit is configured to drive the switch based on the first output voltage; a second driver circuit coupled to the second regulator and the switch, wherein the second driver circuit is configured to drive the switch based on the second output voltage; a driver controller coupled to the first driver circuit and the second driver circuit, wherein the driver controller is configured to select one of the first driver circuit and the second driver circuit to drive the switch based on a control signal; and a switch node coupled to the switch, wherein a switch node voltage at the switch node is a function of the switch being turned on and off.

The present invention provides a driving circuit for a driving hip. The driving circuit includes a bootstrap circuit with a bootstrap voltage terminal. A power terminal of a high-voltage driving circuit is connected to the bootstrap voltage terminal, and a ground terminal of the high-voltage driving circuit is connected to a regulating terminal. A high-side drive circuit includes a high-side pull-up circuit and a high-side pull-down circuit. The driving circuit includes: an auxiliary power terminal; a mirror current source an input terminal of the mirror current source being connected to the bootstrap voltage terminal; a first MOS transistor; a second MOS transistor an equivalent diode component, an output terminal of the second MOS transistor being connected to the regulating terminal through the equivalent diode component; and an equivalent resistance component, the gate of the first MOS transistor being connected to the regulating terminal through the equivalent resistance component.

A load switch includes a switch input, a switch output, a first field-effect transistor (FET), and a second FET. The switch input is adapted to be coupled to a controller output of a controller. The switch output is adapted to be coupled to a controller input of the controller. The first FET has a gate and a source. The gate of the first FET is coupled to the switch input. The second FET has a gate and a source. The gate of the second FET is coupled to the source of the first FET. The source of the second FET is coupled to the switch output.

A control system includes a control unit. When turning a bidirectional switch element ON, the control unit controls the bidirectional switch element to cause a time lag between a first timing and a second timing. The first timing is a timing when a voltage equal to or higher than a threshold voltage is applied to one gate electrode selected from a first gate electrode and a second gate electrode. The one gate electrode is associated with one source electrode selected from a first source electrode and a second source electrode and having a lower potential than the other source electrode. The second timing is a timing when a voltage equal to or higher than a threshold voltage is applied to the other gate electrode associated with the other source electrode having a higher potential than the one source electrode.

A switch circuit of an embodiment includes a high frequency switch, a first charge pump circuit, a boost signal generation circuit, and a second charge pump circuit. The high frequency switch switches transmission and reception of a high frequency signal. The first charge pump circuit generates a first voltage and a second voltage biased to the high frequency switch. When an edge of an input signal is detected, the boost signal generation circuit generates a first boost signal for temporarily increasing drive capacity of the first charge pump circuit. When the first boost signal is input, the second charge pump circuit operates to temporarily increase the drive capacity of the first charge pump circuit.

The switch device includes a first circuit. The first circuit has a first end coupled between a first terminal and a second terminal, and the first circuit has the second end coupled between the first terminal and the second terminal or coupled to a third terminal. The first circuit includes a first switch and a second switch. The first switch is coupled between the first end and the second end of the first circuit and is turned on or off according to a first control signal. The second switch is connected to the first switch in parallel and is turned on or off according to a second control signal. The first switch and the second switch include transistors of the same type. In a surge protection mode, the second switch is turned on to dissipate the surge current.

To provide a power converter which can detect occurrence of excess current in early stage without providing a blanking time when the detection of excess current is not performed after the turn on of the switching device, and which can protect the power converter. A power converter includes a time change detection circuit that outputs a detection signal according to a time change rate of a main voltage; an excess current determination circuit that generates an excess current occurrence signal of normal current state when the detection signal is less than a first threshold value, and generates the excess current occurrence signal of excess current state when the detection signal is not less than the first threshold value; and a driving circuit that generates the driving voltage of OFF state when the drive command signal is ON state and the excess current occurrence signal is excess current state.

A drive circuit includes a second drive circuit that drives a semiconductor switching element in a case where a pulse width of a corresponding signal is determined to be larger than a second threshold, and a timing adjustment circuit that adjusts a timing at which the second drive circuit cooperates with a first drive circuit to drive the semiconductor switching element during a turn-off period of the semiconductor switching element due to drive of the first drive circuit.

A bootstrapped switch includes a first transistor, a second transistor, a first capacitor, three switches, and a switch circuit. The switch circuit includes a first switch, a second switch, a second capacitor, and a resistor. The first transistor receives the input voltage and outputs the output voltage. The first terminal of the second transistor receives the input voltage, and the second terminal of the second transistor is coupled to the first terminal of the first capacitor. The control terminal of the first switch receives a clock. The second switch is coupled between the control terminal of the first transistor and the first switch. The second capacitor is coupled between the control terminal of the first switch and the control terminal of the second switch. The resistor is coupled between the control terminal of the second switch and a reference voltage.

Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.