Abstract: An electronic apparatus is provided. The electronic apparatus according to an embodiment includes a main circuit unit, a power source supplier configured to generate power, and supply the generated power to the main circuit unit, and a surge protector disposed between the main circuit unit and the power source supplier, the surge protector being configured to, based on a surge occurring from the power source supplier, perform a clamping operation on power output from the power source supplier at a first voltage level, wherein the power source supplier is further configured to, based on the clamping operation of the surge protector at the first voltage level being stopped, perform a clamping operation on the generated power at a second voltage level greater than the first voltage level.

Abstract: A lightning protection device for an aircraft, includes an anti-corona element taking a rounded shape and having an electrically conductive surface, intended for enveloping an area of the airframe of the aircraft that is liable to receive a lightning strike, one or more electric charge dissipators attached to said anti-corona element.

Abstract: A semiconductor device for internal combustion engine ignition includes: a power semiconductor switching device that switches ON and OFF in accordance with a control signal provided by an external control circuit for causing a spark plug to produce sparks via an ignition coil and an external power source; an auxiliary voltage circuit that generates and applies an auxiliary voltage responsive to a collector voltage of the power semiconductor switching device to the gate of the power semiconductor switching device; and a constant current circuit that regulates current from the auxiliary voltage circuit to the gate of the power semiconductor switching device when a high-voltage surge originating from the external power source is applied to the auxiliary voltage circuit via a primary winding of the ignition coil.

Abstract: A DC-to-DC transformer converts power from an input source to a load using a fixed voltage transformation ratio. The density of point of load power conversion may be increased and the associated power dissipation reduced by removing the input driver circuitry from the point of load where it is not necessary. An output circuit may be located at the point of load providing fault tolerant rectification of the AC power from the secondary winding of a power transformer which may be located nearby the output circuit. The driver circuit may drive a plurality of transformer-output circuit pairs. The transformer and output circuit may be combined in a single module at the point of load. Alternatively, the output circuit may be integrated into point of load circuitry such as a processor core. The transformer may be deployed near the output circuit.

Abstract: A circuit converts an AC or DC electrical input applied between first and second input leads into a DC output applied to a load via first and second output leads. Four thyristors have their anodes respectively connected to one of the first and second input leads or one of the first and second output leads. Cathodes of two thyristors are connected to the first and second output leads while cathodes of two other thyristors are connected to the first and second input leads. Gates of each thyristor are connected to respective unidirectional switches that open and close at the same time. When closed, the unidirectional switches polarize the gates. Thyristors having a positive voltage on their anodes apply this voltage to the first output lead to power the load. Thyristors having a negative voltage on their cathodes transmit return current from the load to the first or second input lead.

Abstract: Power isolators with multiple selectable feedback modes are described. The power isolators may transfer a power signal from a primary side to a second side. A feedback signal may be provided from the secondary side to the primary side to control generation of the power signal on the primary side. In this manner, the power signal provided to the secondary side may be maintained within desired levels. The feedback signal may be generated by feedback circuitry configurable to operate in different modes, such that the feedback signal may be of differing types depending on which feedback mode is implemented.

Abstract: A PWM power supply controllers are typically applied for a single output power supply. For specific applications, like LCD TV's, dual outputs are required. As a preference to only regulate one output, the performance of the system suffers when the outputs are unequally loaded. The disclosure describes a way to balance the outputs, such that when the output are unequally loaded, additional outputs are still accurately regulated.

Abstract: A switching power supply apparatus includes a switching device and a switching power supply control circuit for converting an AC source voltage to a DC voltage. A comparison circuit in the switching power supply control circuit produces an H-level output signal when its non-inverted input voltage exceeds a voltage value during each off-state period of the switching device. A delay circuit outputs a pulse signal after a predetermined delay time from detecting the H-level signal. This pulse signal indicates detection of a bottom point of drain voltage of the switching device. Since the output of the delay circuit is directly connected to the set input terminal S of a flip-flop, the switching device is surely turned on, without bottom skip, upon detection of the bottom point of its drain voltage.

Abstract: LED light bar network current foldback circuit comprises: voltage reference module, voltage division and sampling module, comparison module. Power supply voltage passes through voltage reference module, generates voltage reference to voltage division and sampling module and comparison module; voltage division and sampling module performs voltage division on voltage reference, and outputs reference voltage to comparison module, which further receives detection voltage from converting detection current of LED light bars, before comparing with reference voltage; if detection voltage is greater than reference voltage, comparison module outputs driving stop command to control LED light bars to stop working. LED light bar network current foldback circuit controls driving circuit to stop working after current of LED light bars, or constant output current, increases abnormally, protecting LED light bars effectively, avoiding high screen body maintenance cost from LED light bars damaging.

Abstract: A regulator includes an operational amplifier, a programmable offset voltage, and a circuit. The operational amplifier includes a non-inverting input, an inverting input, and an output. The programmable offset voltage is configured to cancel a built-in offset voltage of the regulator based on a code. The circuit is configured to set the code based on a sensed built-in offset voltage of the regulator in response to an offset cancellation calibration mode enable signal.

Abstract: A low drop-out (LDO) voltage regulator circuit includes a power transistor having a control terminal configured to receive a control signal and an output terminal coupled to an output node. A current regulation loop senses current flowing through the power transistor and modulates the control signal to cause the power transistor to output a constant current to the output node. A voltage regulation loop senses voltage at the output node and modulates the control signal to cause the power transistor to deliver current to the output node so that an output voltage at the output node is regulated. The current regulation loop includes a bipolar transistor connected to the control terminal of the power transistor, where a base terminal of the bipolar transistor is driven by a signal dependent on a difference between the sensed current flowing through the power transistor and a reference.

Abstract: The power module comprises an electronic board (EB), in which at least one power switching branch is integrated, a capacitor (CE) and at least three DC power supply busbars (B1, B2, B3), wherein the electronic board is mounted between a first busbar (B1) and a second busbar (B2) and the capacitor is mounted between the second busbar (B2) and a third busbar (B3) and the electronic board, the capacitor and the busbars comprise electric contact faces allowing assembly, of the “press pack” type, of the electronic board and of the capacitor.

Abstract: The present invention relates to a DC-DC converter and to a method for controlling a DC-DC converter with high dielectric strength and reduced power losses. An optimized control of a potential-isolating multi-level half-bridge converter according to a phase-shifted full-bridge configuration with a novel modulation method is proposed.

Abstract: An open-loop charge pump is provided. In the open-loop charge pump, a peak current limiting control circuit is arranged between a control circuit and a boost circuit. The control circuit drives the peak current limiting control circuit based on an over-voltage protection signal to control the boost circuit to be in a charging phase continuously or in a normal operation mode. In a case that the output voltage is higher than an upper threshold voltage, the boost circuit is continuously in the charging phase and does not supply power to an output load, and an output capacitor is discharged to supply power to the output load. In a case that the output voltage is lower than a lower threshold voltage, the boost circuit is in the normal operation mode.

Abstract: Some embodiments include apparatuses having a switching circuit included in a buck converter; an output node; an inductor including a first portion having a first terminal coupled to the switching circuit, a second portion having a second terminal coupled to the output node, and a third terminal between the first and second portions; and a capacitor coupled to the second terminal, the second terminal to couple to a first additional capacitor, and the third terminal to couple to a second additional capacitor.

Abstract: A low-voltage protective switching device includes: at least one line conductor length extending from a line conductor supply connection of the low-voltage protective switching device to a line conductor load connection of the low-voltage protective switching device; a neutral conductor length extending from a neutral conductor connection of the low-voltage protective switching device to a neutral conductor load connection of the low-voltage protective switching device; a mechanical bypass switch and a first mechanical circuit breaker disposed in series in the line conductor length; a second mechanical circuit breaker disposed in the neutral conductor length; a first semiconductor switching arrangement disposed in parallel to the bypass switch; and an electronic control unit that presettably actuates the bypass switch, the first mechanical circuit breaker, the second mechanical circuit breaker, and the first semiconductor switching arrangement.

Abstract: An integrated circuit comprising: a high-side pMOSFET comprising a drain and a gate; a node coupled to the drain of the high-side pMOSFET; a voltage-to-current circuit comprising a first nMOSFET and a first resistor, the first nMOSFET comprising a gate and a source, the first resistor comprising a terminal coupled to the source of the first nMOSFET; an error amplifier comprising an output port coupled to the gate of the first nMOSFET; a skip clamp nMOSFET comprising a source coupled to the output port of the error amplifier; and a current limit clamp pMOSFET comprising a source coupled to the output port of the error amplifier.

Abstract: In a power converter having a regulator and charge pump, both of which operate in plural modes, a controller receives information indicative of the power converter's operation and, based at least in part on said information, causes transitions between regulator modes and transitions between charge-pump modes.

Abstract: A power converter and method are presented. The power converter may have a pass device, a replica device, a feedback circuit, and a regulation circuit. The pass device may be coupled on a first electrical path between an input terminal of the power converter and an output terminal of the power converter. The replica device may be coupled on a second electrical path between the input terminal and the output terminal, wherein a coupling node is arranged on the second electrical path between the replica device and the output terminal. The feedback circuit may generate, based on a reference voltage and an output voltage at the output terminal, a control signal for controlling both the pass device and the replica device. The regulation circuit may reduce a voltage difference between a coupling voltage at the coupling node and the output voltage at the output terminal of the power converter.

Abstract: The present disclosure provides for a processing element configured to couple to a first ramp generator and a second ramp generator and control the first ramp generator while a power converter is operating in a buck-boost mode of operation to generate a first ramp signal beginning at a first value and increasing to a second value during a first clock cycle and generate the first ramp signal beginning at the first value and increasing to a third value during a second clock cycle following the first clock cycle and control the second ramp generator while the power converter is operating in the buck-boost mode of operation to generate a second ramp signal beginning at a fourth value and decreasing to a fifth value during the first clock cycle and generate the second ramp signal beginning at the fourth value and decreasing to a sixth value during the second clock cycle.