Abstract: A semiconductor device is provided, which comprises a rectifier circuit configured to generate a first voltage from a first signal inputted from an input terminal, a comparing circuit configured to compare a reference voltage and the first voltage inputted from the rectifier circuit and to output a second signal to a switch, and a voltage generation circuit configured to generate a second voltage from the first signal inputted from the input terminal. The rectifier circuit includes a transistor including at least a control terminal, and the voltage generation circuit inputs the second voltage to the control terminal when the switch is turned on in accordance with the second signal.

Abstract: A power conversion circuit includes a bidirectional switch 2. The bidirectional switch 2 has a first gate terminal G1, a second gate terminal G2, a first ohmic terminal S1 and a second ohmic terminal S2. The bidirectional switch 2 has four operation states. In the first state, the bidirectional switch 2 operates as a diode having a cathode as the first ohmic terminal S1 and an anode as the second ohmic terminal S2. In a second state, the bidirectional switch 2 operates as a diode having an anode as the first ohmic terminal S1 and a cathode as the second ohmic terminal S2. In a third state, the bidirectional switch 2 is bidirectionally conductive with via a diode between the first and second ohmic terminals S1 and S2. In a fourth state, the bidirectional switch 2 cuts off a bidirectional current between the first and second ohmic terminals.

Abstract: A resonant DC to DC converter circuit receiving an input voltage and capable of delivering multiple output voltages, while maintaining excellent cross-regulation with only one power transformer. The circuit of the invention uses trailing edge modulation, along with a new amplitude modulation arrangement which allows for the use of resonance with synchronous rectification and only a single power transformer. Thus, the circuit provides for DC to DC conversion, as well as an amplitude modulation arrangement.

Abstract: A system and method are provided for increasing and maintaining voltage. A transformer's secondary windings are connected between the hot input line and the hot output line, and are not switched. The secondary windings may be in series for 220/230 Vrms, and in parallel for 120/127 Vrms. Alternatively, the transformer may be a single voltage type specifically for 230 V, 120 V, or any other voltage range. A microprocessor measures incoming voltage and controls an electronic switch on the primary windings side of the transformer to short circuit the primary windings when the transformer is not needed. When voltage boost is needed, the switch may be controlled to connect the primary windings to neutral. When the primary windings are switched to neutral, the secondary voltage adds to the incoming AC line voltage. There may be multiple taps on the primary windings selected by the microprocessor for providing differing boost levels at differing input voltage levels.

Abstract: An object is to provide a rectifier circuit of which the drop in the output voltage by the threshold voltage of a transistor used as a rectifier element is suppressed. Another object is to provide a rectifier circuit whose variations in the output voltage are suppressed even in the case where the amplitude of input AC voltage varies greatly. A transistor may be used as a rectifier element in such a way that a gate electrode of the transistor is connected to a second electrode of the transistor through a capacitor, and the potential of the gate electrode is held to be higher than the potential of the second electrode by a difference greater than or equal to the threshold voltage.

Abstract: Switching device controllers, drive circuits, power converters and related methods are disclosed. One example controller for a switching device includes a drive circuit for controlling the switching device and an auxiliary circuit coupled to the drive circuit. The auxiliary circuit includes an input for receiving a waveform having alternating first and second intervals. The auxiliary circuit is configured to energize the drive circuit during the first intervals and de-energize the drive circuit during the second intervals. One example method of energizing and de-energizing a drive circuit for a switching device includes receiving a waveform having alternating first and second intervals, energizing the drive circuit during the first intervals, and de-energizing the drive circuit during the second intervals.

Abstract: A resonant converter including a primary side switching stage having high- and low-side switches series connected at a switching node and controlled by a primary side controller; a transformer having a primary coil and a secondary coil, the secondary coil having at least one pair of portions series connected at a node, a resonant tank formed by series connecting the primary coil to the switching node with a first inductor and a first capacitor; at least one pair of first and second secondary side switches connected to the at least one pair of portions, respectively, the first and second secondary side switches of each pair being used for synchronous rectification; and a secondary side controller to control and drive the first and second secondary side switches of each pair by sensing voltage across each secondary side switch and determining a turn ON and turn OFF transition for the first and second secondary side switches in close proximity to a point in time when there is zero current through the secondary s

Abstract: A bi-directional DC-DC converter has a transformer for connecting a voltage type full bridge circuit connected to a first power source and a current type switching circuit connected to a second power source. A voltage clamping circuit constructed by switching elements and a clamping capacitor is connected to the current type switching circuit. The converter has a control circuit for cooperatively making switching elements operative so as to control a current flowing in a resonance reactor.

Abstract: A method and an apparatus for setting a feedback power of a converter clocked at a fundamental frequency on the power supply side are disclosed. The converter includes a bridge circuit equipped with controllable semiconductor switches, wherein the semiconductor switches are clocked at the fundamental frequency depending on a desired direction of a power flow through the bridge circuit. Drive signals for the semiconductor switches are derived from the clock pulses at the fundamental frequency and a switch-on delay which depends on a DC link voltage of a DC link connected to the converter. The switch-on delay is determined based on a predetermined characteristic curve that depends on the DC link voltage.

Abstract: It is described a high efficiency rectification stage using dynamic threshold MOSFET. The idea is to use the input signal to reduce the threshold voltage when the transistor has to be on, and to increase the threshold when the transistor has to be off. This allows reducing both the resistive losses and the leakage current. A matching network allows the generation of a second higher voltage signal to drive the control gates and the bulk, i.e. the wells, of the transistors. Further, a self-tuned front-end is provided to extend the bandwidth of the high-Q charge pump.

Abstract: An active rectifier and a wireless power receiver including the active rectifier are provided. According to an aspect, an active rectifier may include: a first loop configured to provide voltage when the phase of an input signal is positive; and a second loop configured to provide voltage when the phase of the input signal is negative, wherein the first loop and the second loop include a delay locked loop configured to compensate for reverse current leakage due to a delay of a switch included therein.

Abstract: A power interface enables a low-power device to be powered from an alternating current (AC) wall receptacle or light socket with automatic backup battery charging. The power interface of an embodiment comprises a transformer module that receives an input signal. The device includes a battery module coupled to the transformer module, and the battery module includes battery charging circuitry coupled to a battery. The device comprises an output controller coupled to the transformer module and the battery module. The output controller includes detector circuitry that detects a state of the input signal. The output controller automatically controls coupling of one of a transformer module output and a battery module output to a device output according to the state of the input signal.

Abstract: A three-phase bridge rectifier circuit (TPBRC) connectable to an AC voltage source (102, 104, 106) via input lines (151, 153, 155) and to a load (199) via output lines (159, 157). The AC voltage source supplies the TPBRC (100) with AC voltage waveforms (302, 304, 306) that differ in phase by a certain amount. The TPBRC includes three series transistor combinations (110/112, 114/116, 118/120) connected across the output lines. A plurality of diodes (190, 128, 198, 148, 113, 168) are connected between a drain (152, 122, 162, 132, 172, 142) of one of the field effect transistors (110, 112, 114, 116, 118, 120) and a gate (154, 124, 164, 134, 174, 144) of a different one of the field effect transistors. A voltage divider (192/188, 130/140, 107/196, 150/160, 115/111, 170/180) and a voltage clamping device (194, 138, 109, 158, 119, 178) is provided for each field effect transistor.

Abstract: A method for operating a line-side fundamental-frequency-clocked converter is disclosed. The converters has a bridge circuit with, for example three, upper and, for example three, lower semiconductor switches, which are connected to respective positive and negative terminals of a DC link circuit. Center taps of connected pairs of the upper and lower semiconductor switches are connected to the line voltage phases. Two upper or two lower semiconductor switches are simultaneously activated during fundamental frequency operation for a predetermined time period before or after a natural trigger instant of the semiconductor switches caused by a line voltage angle. An estimated line voltage angle for clocking the semiconductor switches is tracked based on two phase currents measured while the two upper or two lower semiconductor switches are simultaneously active.

Abstract: A synchronous rectification control circuit assembly includes a first transformer, a reference voltage generator, a first PWM control signal generating circuit, a second PWM control signal generating circuit, a first synchronous rectification circuit, and a second synchronous rectification circuit. When the output voltage rises, the conduction time of the first synchronous rectification circuit and the second synchronous rectification circuit are relatively regulated to lower the output voltage, maintaining stability of the output voltage.

Abstract: A drive system for driving a multi-phase motor (such as a three-phase AC motor) or other load. Where a transformer is used, the transformer may have a disconnected wye configuration on the secondary side. The system may also utilize the average or other combination of DC bus voltages of inverters for each load phase, to provide feedback control.

Abstract: Control systems, methods and fully regenerative power conversion systems are presented for mitigating common mode voltages in AC loads by employing inverter and/or active rectifier PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector.

Abstract: An AC/DC converter that converts an AC input voltage Vin to a DC output voltage comprises an inductor, a capacitor selectively coupled to the inductor, a plurality of switches, and a controller. The controller configures the plurality of switches, inductor, and capacitor to operate as a buck converter during times when Vin>Vout and to operate as an inverting buck converter during times when Vin<?Vout. The controller modulates the duty cycles of the plurality of switches to regulate the DC output voltage Vout to the desired, constant output level.

Abstract: An induction power system configured to drive a load includes a primary side circuit (PSC) and a secondary side circuit (SSC). The PSC has a main inductor configured to generate a current-induced magnetic field. The SSC has an induction electrification unit (IEU) and a power distribution unit (PDU). The IEU has a first inductor and a second inductor connected in series, and is adjacent to the main inductor to generate an induced AC. The PDU has a first capacitor, a second capacitor, and a switching device. The first capacitor and the first inductor are connected in series and generate a series resonance to supply a control power. The second capacitor is connected in parallel with the first inductor, the second inductor, and the first capacitor, and generates a parallel resonance, to provide a load power. When the switching device is turned on, the load power is supplied to the load.

Abstract: The invention relates to a resonant converter (1) which has multiple outputs (7a, 7b) and contains a transformer (4) with a primary winding (5) and at least two secondary windings (6a, 6b) having different winding directions. In this way it is possible to design as cost-effectively as possible a resonant converter with multiple outputs, two of which can be controlled separately from each other.

Abstract: A control system for controlling a multiphase power converter includes a current control module, a voltage control module and a current command selector. The current control module generates grid voltage command signals for the multiphase power converter and the voltage control module generates reference converter current command signals for the current control module. The current command selector supplies active and reactive current command signals from a supervisory controller to the current control module when the multiphase power converter is connected to the grid and supplies the reference converter current command signals to the current control module when the multiphase power converter is unconnected to the grid.

Abstract: A power supply device includes: a power supply part to convert an AC voltage from an AC power source into a direct current and output a DC voltage; a zero cross detector to detect zero cross timings of AC voltage; and a power supply controller to control supply of the AC voltage to the power supply part and the zero cross detector based on the zero cross timing.

Abstract: The present invention relates to a method for charging accumulation means via an external electrical network via at least a first (A) and a second (B) switching arm respectively comprising two switches (12), said method comprising a step for controlling the switches (12) of the switching arms (A, B) by transmission of pulse width modulation control signals, characterized in that the switches (12) of the second switching arm (B) are controlled by adapting the pulse width of the control signals so as to generate an alternating voltage (Vx) in phase opposition relative to the voltage at the terminals of a compensation inductance (7?) connected on the one hand to the second arm (B) and on the other hand to the neutral (N) of said network, so that the voltage (VN) between the neutral (N) of said network and ground is a direct voltage. The invention also relates to a charging device for implementing such a charging method.

Abstract: An adaptive synchronous rectification control circuit and a control method are developed. The control circuit comprises an adaptive circuit that generates a reference signal in response to a detection signal of a power converter. A clamped circuit clamps the reference signal at a threshold voltage if the reference signal equals or is greater than the threshold voltage. A switching circuit generates a control signal to control a synchronous switch of the power converter in response to the detection signal and the reference signal. The control method generates the reference signal in response to the detection signal. The reference signal is clamped at the threshold voltage if the reference signal equals or is greater than the threshold voltage. The method further generates the control signal to control the synchronous switch of the power converter in response to the detection signal and the reference signal.

Abstract: A power supply module is configured for converting an AC voltage to a first DC voltage and applying the first DC voltage to a load. The power supply module includes a rectifying and filtering unit, a PFC unit, a voltage transforming unit, an input port, and a switch unit. The rectifying and filtering unit rectifies the AC voltage into a primary DC voltage and filters the primary DC voltage. The PFC unit corrects a power factor of the filtered primary DC voltage. The voltage transforming unit converts the corrected primary DC voltage and generates the first DC voltage for applying the load. The input port receives a first instruction or a second instruction and generates a first signal or a second signal, respectively. The switch unit establishes or disconnects an electrical connection between the voltage transforming unit and the load according to the first signal or the second signal.

Abstract: An synchronous rectifying apparatus or synchronous rectifying circuit of a soft switching power converter is provided to improve the efficiency. The integrated synchronous rectifying circuit includes: a power transistor connected from a transformer to the output of the power converter for rectifying; a controller having a latch circuit generates a drive signal to control the power transistor in response to a switching signal generated by a winding of the transformer in response to the switching of the transformer. The controller turns off the power transistor when the switching signal is lower than a low-threshold. The power transistor is turned on when the switching signal is higher than a high-threshold. Furthermore, a maximum-on-time circuit provided in the controller is applied to generate a maximum-on-time signal for limiting the maximum on time of the power transistor.

Abstract: A synchronous boost DC/DC conversion system comprises an input for receiving a DC input voltage, an output for producing a DC output voltage, a power switch controllable to adjust an output signal of the conversion system, and an inductor coupled to the input. A synchronous rectifier is configurable to create a conduction path between the inductor and the output to provide the inductor discharge. A control circuit is provided for controlling the synchronous rectifier as the input voltage approaches the output voltage, so as to adjust average impedance of the conduction path over a discharge period of the inductor.

Abstract: An n-phase transistor active bridge circuit (BC) connectable between at least two input lines (103, 105, 1051, 1053, 1055) and a pair of output lines (134, 136, 1057, 1059). The BC comprises a plurality of field-effect transistors (FETs) of the same channel type. The FETs (102, 104, 106, 108, 1010, 1012, 1014, 1016, 1018, 1020) are connected to convert an n-phase AC waveform (402, 1102, 1104, 1006) to a DC waveform (502, 1302). The n-phase AC waveform is applied to BC by a voltage source (101, 1002, 1004, 1006) coupled to the input lines. Gate drive circuits (170, 172, 174, 176, 1001a, 1001b, 1001c, 1003a, 1003b, 1003c) supply a voltage to gates (139, 143, 147, 151, 1024, 1034, 1044, 1054, 1064, 1074) of the FETs for switching the FETs to their “on” states or “off” states at predetermined times.

Abstract: In an electric power converter for a vehicle which is connected to an alternating-current generator for a vehicle and performs synchronous rectification, switching mistakes are reduced and efficiency is improved by setting an optimal control allowance time in generating a switching timing signal from a diode ON signal. A control allowance according to the operating state of a generator can be determined by obtaining a control allowance time as a sum of a control delay time which is constant irrespective of the operating state of the generator, and an allowance time which varies depending on the operating state of the generator. Thereby, optimal switching timing is obtained and the reduction of switching mistakes and an improvement in efficiency are performed.

Abstract: The drive device includes a first switch section including switching elements, a second switch section including switching elements, and output circuits. Each of the output circuits includes a switching element having a first and a second end, a first voltage being supplied to the first end, and a first and a second rectifier element each having a current input terminal and a current output terminal connected to the second end of the switching element. Each of the output circuits corresponds to one of the switching elements of the first switch section and one of the switching elements of the second switch section, the one of the switching elements of the first switch section is connected to the current input terminal of the first rectifier element, and the one of the switching elements of the second switch section is connected to the current input terminal of the second rectifier element.

Abstract: A device for generating electric power of a traction system of a motor vehicle powered by a battery, including a first rectifier stage configured to be connected to a power supply network or to a load to be powered, a second inverter stage configured to be connected to the battery, a mechanism regulating average current flowing between the first stage and the second stage, and a controller controlling a transfer of electric power between the power supply network and the battery or the powering of a load.

Abstract: The configurations of a resonant converter system and a controlling method thereof are provided. The proposed resonant converter system includes a resonant converter receiving an input voltage for outputting an output voltage, a rectifying device having a first rectifying switch and a synchronous rectification control circuit coupled to the resonant converter and including a signal generation apparatus generating a weighted turn-off signal to turn off the first rectifying switch at a zero crossing point of a first current flowing through the first rectifying switch.

Abstract: This invention relates to an ACDC converter (1) comprising a converter input (3) and a converter output (5), a pre-regulation stage (7) and a DC transformer stage (9) comprising a transformer input stage (11) and a transformer output stage (13). The transformer input stage comprises a double ended converter and there is further provided a controller (17) for providing a control signal to the double ended converter. The controller (17) operates the ACDC converter using burst mode control and by sending control signals comprising pulse sets that are designed to provide substantially zero net magnetising current in the double ended converter. The pre-regulation stage preferably comprises a buck converter which in turn also provides power factor correction to the input of the ACDC converter.

Abstract: Power is supplied to excitation windings in order to generate magnetic fields, preferably for activating superconducting coils. An AC transformer is used, and triggering of the coil is performed via a rectifier having little power loss. Preferably, a two-way rectifier using a freewheeling circuit is utilized in the associate device, thus preventing losses when power is supplied and especially when the power is discharged.

Abstract: The active rectifier circuit and related method of operation disclosed herein is self-powered and improves the efficiency and reliability of photovoltaic solar power systems by replacing the conventional bypass and blocking rectifiers used in such systems. The circuit includes a power MOSFET used as a switch between the anode and cathode terminals, and control circuitry that turns on the MOSFET when the anode voltage is greater than the cathode voltage. The method of operation utilizes resonance to produce a large periodic voltage waveform from the small anode-to-cathode dc voltage drop, and then converts the period voltage waveform to a dc voltage to drive the gate of the power MOSFET.

Abstract: An example of the current source power conversion circuit is provided with a plurality of half-bridge rectifier circuits which are connected in parallel, each including a serial connection of a first switch circuit having a first self-turn-off element and a first diode which are connected in series to each other, and a second switch circuit having a second self-turn-off element and a second diode which are connected in series to each other. A first current electrode of said first self-turn-off element in one of said half-bridge rectifier circuits and a first current electrode of said first self-turn-off element in other one of said half-bridge rectifier circuits are short-circuited and connected.

Abstract: An active diode is disclosed. One embodiment provides a method for operating a device. The electronic device includes a transistor connected between a first and a second connection of the electronic device; a control device coupled to a control connection of the transistor; and an energy storage device coupled to the control device.

Abstract: The present invention discloses a bridgeless active power factor corrector with a logic control comprising a high frequency switch controller, a boost inductor, an output filtering capacitor, two boost transistor modules, two boost diodes, two AC input voltage polarity detectors, and two low frequency switch drivers. With a coupling signal, the two AC input voltage polarity detectors respectively control the two low frequency switch drivers in conjunction with the high frequency switch controller to drive the two boost transistor modules with a logic control so that the inductor current releasing electric energy from the boost inductor can flow through the channels of the two boost transistor modules to effectively reduce the body diode conduction loss.

Abstract: In a DC/DC converter comprising a transformer (10) having a primary winding Np and at least first and second secondary windings Ns1 and Ns2; a main output path connecting the first secondary winding to a main output Vp and comprising a synchronous rectifier circuit, a first inductor L1, and a first capacitor C1; and an input path connecting a DC supply voltage Ve to the primary winding and including a switch circuit (12) controlled by a first pulse width modulator PWM1 to regulate the main output voltage by switching the current in the primary winding, there is provided an auxiliary output circuit connecting the second secondary winding to an auxiliary output Va and comprising an auxiliary rectifier path having a control switch M5, a free-wheel switch M6, a rectifier switch M3, a second inductor L2, and a second capacitor C2; and a second pulse width modulator PWM2 connected to the control switch M5 and to the free-wheel switch M6 to control a conduction interval of said switches in order to regulate the auxi

Abstract: A process for powering an electrical load includes applying a rectified alternating current waveform across the load for a first time period with only a single power supply for at least two half cycles. At least one half cycle of an alternating current waveform of opposite polarity are then applied relative to the rectified alternating current waveform across the load for a second time period. Rectified alternating current waveform is then again applied across the load for at least two half cycles for a third time period to power the electrical load. The rectified alternating current waveform can be applied a direct current offset. A power supply is provided for provided power across the load according to this process.

Abstract: Exemplary embodiments are directed to power conversion. A device may include a controllable switch coupled between an AC network and a DC network. The device may further include control circuitry configured to modify a configuration of the switch based on a detected difference between a reference signal and an output signal at the DC network.

Abstract: A rectifier bridge circuit is described for rectifying the phase voltage generated by a generator, including a positive half-bridge having multiple rectifier elements and a negative half-bridge having multiple rectifier elements. The rectifier elements each have a controllable switch having a diode connected in parallel. A control circuit is provided for switching the switches on and off. The switch-on time tswitch on setpoint and/or the switch-off time tswitch off setpoint of the switch is/are computed based on a characteristic map or a mathematical function.

Abstract: An inverter circuit having a primary circuit with a first choke for periodically connecting a primary winding to a DC voltage present at an input of the inverter circuit, a secondary circuit with a secondary winding, the secondary winding arranged in series with a first capacitor and connected via a full bridge consisting of four switching elements to a AC voltage present at an output of the inverter circuit via a second choke, and a transformer, wherein the primary circuit and the secondary circuit are electrically isolated by the transformer.

Abstract: A transformer includes a first secondary winding, a second secondary winding, and a third secondary winding. The second secondary winding and the third secondary winding are wound to include the same number of turns and to have opposite magnetic polarities. A low-pass filter includes a second inductor defined by a leakage inductance of the second secondary winding connected in series with the second secondary winding, a second inductor defined by a leakage inductance of the third secondary winding connected in series with the third secondary winding, and a second capacitor. An output voltage is output from an output terminal of the low-pass filter.

Abstract: A voltage detecting circuit to perform voltage detection by introducing a voltage from a detection node, comprises: a first resistance, a second resistance, and a first switching element, connected in series with each other from the detection node to reference electric potential in order; and a detection circuit for performing a detection operation of a voltage by receiving input of the voltage from a node between the first resistance and the second resistance, wherein a control voltage generated on the basis of the voltage at the detection node is supplied to a control terminal of the first switching element, and the first switching element is turned on when the voltage at the detection node is large, and the first switching element is turned off when the voltage at the detection node is small.

Abstract: A semiconductor device of a three-level inverter circuit with a reduced number of power supplies for driving IGBTs. The semiconductor device includes a series-connected circuit of IGBTs between P and N of a DC power supply and an AC switch element that is connected between a series connection point of the series-connected circuit and a neutral point of the DC power supply. The series-connected circuit and the AC switch element are integrated into one module. The AC switch element is formed by connecting a collector of a first IGBT to which a diode is connected in reverse parallel and a collector of a second IGBT to which a diode is connected in reverse parallel, and an intermediate terminal is provided at a connection point between the collectors.

Abstract: The disclosed embodiments relate to apparatus and method for reducing power losses in a power supply. There is provided an apparatus comprising means for coupling a first signal (S2) to a reference level (ground) when the coupling means is conductive, means for placing the coupling means in a conductive state during a duration of a portion of a period of a second signal (S3), and means for altering the duration of conduction of the coupling means in response to an amplitude of the second signal.

Abstract: Disclosed is a PWM rectifier in which switching losses in a semiconductor device are reduced without degrading the response of a control system. In a PWM overmodulation region, the modulation scheme is set to a three-phase modulation scheme. In other regions, a switchover condition such as the amplitude of an input current is acquired and compared with a switchover level. If the switchover condition equals or exceeds the switchover level, the modulation scheme is switched over to a modified two-phase modulation scheme which reduces the number of switching operations to two thirds for the same PWM frequency.

Abstract: In a rectifier circuit, by using a transistor whose off-state current is small as a so-called diode-connected MOS transistor included in the rectifier circuit, breakdown which is caused when a reverse bias is applied is prevented. Thus, an object is to provide a rectifier circuit whose reliability is increased and rectification efficiency is improved. A gate and a drain of a transistor are both connected to a terminal of the rectifier circuit to which an AC signal is input. In the transistor, an oxide semiconductor is used for a channel formation region and the off-state current at room temperature is less than or equal to 10?20 A/?m, which is equal to 10 zA/?m (z: zepto), when the source-drain voltage is 3.1 V.

Abstract: This invention provides a means and method for preventing unwanted semiconductor turn-on and turn-off, caused by a high rate of voltage change, without significantly affecting the desired ON and OFF transitions of the semiconductor. According to this invention, time is provided during either or both bistable ON and OFF semiconductor states, during which the semiconductor gate is allowed to float, neither being driven ON or OFF, and circuitry for lowering gate-node impedance at non-transitional times to prevent state disruptions by dV/dT is provided.