Abstract: A current-mode buck converter is disclosed, wherein the current-mode buck converter operates in a pulse width modulation (PWM) mode or a pulse frequency modulation (PFM) mode. When the current-mode buck converter enters into the PFM mode, the voltage level of the parking voltage is maintained at the voltage level of compensation voltage, so as to decrease switch loss of the current-mode buck converter operating between PWM mode and PFM mode, and stabilize the output voltage of the current-mode buck converter.

Abstract: A valve assembly for use with a washing appliance having a main controller includes a valve that is moveable between a first position that prevents water from flowing through a supply line and a second position that allows water to flow through the supply line. A control assembly separate from the main controller is configured to control the valve to move between the first position and the second position. The control assembly includes a flow sensor configured to output a signal representing an amount of water flowing through the supply line and a control unit configured to control the valve assembly based on the output signal of the flow sensor.

Abstract: A technology capable of reducing load on both system processing and filter operation and improving power consumption and performance is provided. In a digital signal processor, a program memory, a program counter, and a control logic circuit are provided, and a bit field of each instruction includes instruction stop flag information and bit field information. Also, the control logic circuit carries out the control in such a manner that the instruction whose instruction stop flag information is cleared is executed as is to proceed to the next instruction processing, execution of the instruction whose instruction stop flag information is set is stopped if an execution resumption trigger condition corresponding to the bit field information is not satisfied, and the instruction whose instruction stop flag information is set is executed if the execution resumption trigger condition corresponding to bit field information is satisfied, to proceed to the next instruction processing.

Abstract: Provided is a light-emitting diode driving apparatus including: a rectifying circuit; a switching element; a choke coil; an output current sensing circuit; an LED light source; a rectifier diode; a control circuit; a feedback sensing circuit; an input voltage sensing circuit; and a conduction time counting circuit, wherein the feedback sensing circuit outputs a feedback dummy current to the output current sensing circuit, the conduction time counting circuit adjusts the feedback dummy current, the feedback sensing circuit outputs to the control circuit a control signal which controls switching of the switching element in response to a signal based on an error between an output feedback signal and a feedback dummy signal generated by the feedback dummy current.

Abstract: A control circuit in a PFM/PWM boost switching regulator includes a timer based PFM exit control circuit configured to receive a first control signal for controlling a main power switch, a zero-cross signal indicative of an inductor current having reached zero current value, and a timer reference signal indicative of a timer threshold duration. The timer based PFM exit control circuit assesses an idle time of the inductor current based on the first control signal and the zero-cross signal. The timer based PFM exit control circuit asserts the PFM exit signal in response to the idle time decreasing below a level being equal to or less than the timer threshold duration, and the boost switching regulator transitions out of the PFM mode and into the PWM mode in response to the PFM exit signal being asserted.

Abstract: Disclosed is a power conversion circuit that suppresses the flow of a through current to a switching element based on a normally-on transistor. The power conversion circuit includes a high-side transistor and a low-side transistor, which are series-coupled to each other to form a half-bridge circuit, and two drive circuits, which complementarily drive the gate of the high-side transistor and of the low-side transistor. The high-side transistor is a normally-off transistor. The low-side transistor is a normally-on transistor.

Abstract: Provided is a voltage regulator including an overcurrent protection circuit using a simple circuit. The voltage regulator includes the overcurrent protection circuit including: a first sense transistor having a gate connected to an output terminal of an error amplifier circuit and a drain connected to a sense resistor; a second sense transistor having a gate connected to the output terminal of the error amplifier circuit; and a control transistor having a gate connected to an output terminal of a control circuit, a source connected to a drain of the second sense transistor, and a drain connected to the sense resistor, in which the control transistor is turned on in response to a detection signal output by the control circuit until a reference voltage exceeds a predetermined voltage.

Abstract: Disclosed are systems and methods for suppressing voltage peaking in a buck regulator. In one aspect, a buck regulator comprises: a pulse-width modulator (PWM) that generates a pulsed signal; a switch operable to selectively connect the regulator to a DC power supply in response to the pulsed signal and output a pulsed output DC signal; a filter for filtering out high frequency noise from the pulsed output DC signal and generating a regulated output signal; an integrator for comparing the pulsed output DC signal with a reference voltage signal and generating an error signal for input to the PWM; a subtractor operable to subtract the reference voltage signal from the filtered output signal to generate an error feedback signal; and an adder operable to add the error feedback signal to the error signal for input to the pulse-width modulator in order to suppress voltage peaks in the filtered output signal.

Abstract: Methods and apparatus of dynamic transient optimization in a voltage regulator according to various aspects of the present invention may comprise a transition detector configured to compare an output voltage error to an amplitude threshold. The voltage regulator may further comprise a frequency detector configured to measure the frequency of the amplitude threshold being exceeded and to compare the frequency to a frequency threshold and a response circuit configured to activate a response according to a comparison between the frequency threshold and the frequency of the amplitude threshold being exceeded.

Abstract: According to an embodiment, a voltage regulator having an output transistor, a voltage dividing circuit, an error amplifier, a detection circuit and a phase compensation capacitance circuit is provided. The output transistor has one end to which a power supply voltage is supplied, a control terminal to which a control signal is input, and the other end which outputs an output voltage. The voltage dividing circuit is connected between the other end of the output transistor and a first reference voltage. The error amplifier is configured to output the control signal according to the difference between a divided voltage and a second reference voltage. The detection circuit is configured to detect an operation environment. The phase compensation capacitance circuit is configured to adjust a phase compensation capacitance between the other end of the output transistor and an input terminal of the error amplifier, in accordance with the detected operation environment.

Abstract: A class D audio amplifier having: an audio control circuit configured to provide a switching signal based on an input signal and a reference signal; an input capacitor coupled between the input signal and the first input terminal of the audio control circuit; an inductor having a first terminal coupled to the switching terminal of the audio control circuit, and a second terminal; an output capacitor having a first terminal coupled to second terminal of the inductor and a second terminal coupled to a load; and a noise suppression circuit having a first terminal coupled to the first input terminal of the audio control circuit, and a second terminal coupled to the switching terminal of the audio control circuit, wherein the noise suppression circuit charges the input capacitor and the output capacitor to reach a preset value.

Abstract: System and method for regulating a power conversion system. For example, a system controller includes a signal generator and one or more power-consumption components. The signal generator is configured to receive a feedback signal related to an output signal of the power conversion system, a current sensing signal and an input voltage, and to generate a control signal based on at least information associated with the feedback signal, the current sensing signal and the input voltage. The power-consumption components are configured to receive the control signal. The signal generator is further configured to determine whether the feedback signal is smaller than a feedback threshold for a first predetermined period of time, the current sensing signal is smaller than a current sensing threshold for a second predetermined period of time, and the input voltage is smaller than a first threshold for a third predetermined period of time in magnitude.

Abstract: In accordance with an embodiment, a circuit includes a first transistor, a second transistor having a reference node coupled to an output node of the first transistor, and a control circuit. The control circuit is configured to couple a second reference node to a control terminal of the second transistor during a first mode of operation, couple a floating reference voltage between the control terminal of the second transistor and the reference terminal of the second transistor during a second mode of operation and during a third mode of operation, and couple a third reference node to the reference terminal of the second transistor during the third mode of operation. The second reference node is configured to have a voltage potential operable to turn-on the second transistor, and the floating reference voltage is operable to turn on the second transistor.

Abstract: A synchronous DC-DC converter having a soft-stop function includes an output stage for supplying an output voltage, wherein the output stage includes a high-side transistor for charging the output voltage and a low-side transistor for discharging the output voltage; an output control circuit, coupled to the output stage, for controlling the high-side transistor and the low-side transistor of the output stage; at least one protection device, for controlling the high-side transistor to be turned off when a specific situation occurs, in order to stop supplying the output voltage; and a soft-stop control circuit, coupled to the output control circuit, for controlling the low-side transistor of the output stage to be turned on when the protection device controls the high-side transistor to be turned off or the synchronous DC-DC converter is disabled, in order to discharge the output voltage.

Abstract: A method of limiting a generator voltage in an overvoltage condition includes the steps of determining an amount of overvoltage of a generator output voltage exceeding a specified voltage and calculating a reference threshold voltage based upon the duration of overvoltage. A switch is modulated according to a voltage error between the output voltage and the reference threshold voltage. The current flow within the generator is interrupted based upon the voltage error to limit the output voltage to a desired voltage.

Abstract: Methods and systems are described for providing power factor correction for high-power loads using two interleaved power factor correction stages. Each power factor correction stage includes a controllable switch that is operated to control the phasing of each power factor correction stage. The phasing of output current from the second power factor correction stage is shifted 180 degree relative to the output current from the first power factor correction stage.

Abstract: The system has a driving circuit for the motor of the electric fan, coupled to the electrical system of a motor vehicle and having a plurality of controlled electronic switches, and an electronic control unit arranged to control the driving circuit in such a way as to cause the flow in the motor of a variable average current capable of producing a required speed of rotation, in accordance with a predetermined relationship or function. The control unit is designed to store a predetermined threshold of rotation speed, and to control the motor through the associated driving circuit in such a way that when the rotational speed of the motor exceeds the threshold the driving circuit causes electrical braking of the motor.

Abstract: The present disclosure is directed to a voltage-to-current sensing circuit having a bias terminal configured to receive a reference voltage, an offset terminal configured to receive an offset current, and an operational amplifier configured to output a low voltage signal. The device includes a first amplifier having first and second high voltage inputs configured to receive a first voltage difference across a sense component on a high voltage line and to generate a first current, a second amplifier having first and second low voltage inputs configured to receive a second voltage difference between the bias terminal and the offset terminal and to generate a second current, a summing circuit configured to provide an intermediate voltage corresponding to a sum of the first and the second currents, and a low-voltage transistor coupled to an output of the amplifier and controlled by the intermediate voltage to generate the output current.

Abstract: In some aspects of the invention, overcurrent protection is carried out by suppressing fluctuations in current flowing through a switching element after overcurrent detection. A peak current reaching time detection circuit detects a peak current reaching time needed until current flowing through a switching element reaches a peak value. A difference voltage detection circuit, including a ½ time detection circuit which detects a time of ½ an ON time of the preceding cycle of the switching element, detects difference voltage between reference voltage used when detecting overcurrent flowing to a load and a signal which has detected current flowing through the switching element for the ½ time. A delay time adjustment circuit, based on at least one of the peak current reaching time and difference voltage, carries out adjustment and control of a delay time occurring until the time when the switching element is turned off after detecting the overcurrent.

Abstract: A power converter used in the current control circuit and control method, consisting of a converter, a voltage divider circuit, a current sampling circuit, a first gain circuit, a differential amplifier, a second gain circuit, a multiplier, a saw tooth wave generator, a modulation comparator, and a driver. The invention samples inductor current through the current sampling circuit and generates the current sense signal, then processes again. With the differential amplifier, it compares the feedback voltage from the voltage divider circuit with the reference voltage, and the results along a modulation comparator output a drive signal to control the duty cycle in order to avoid the generation of inrush current. The present invention avoids inrush current caused by the large drive signal and achieves a good response rate and better system stability.

Abstract: A controller for a DC to DC converter, comprising first and second electrically controlled switches and an inductor, wherein placing the first switch in a low impedance state causes a current flow in a first direction through the inductor to increase, and placing the second switch in a low impedance state causes the current flow in the first direction to decrease. The controller can operate a DC to DC converter in a first mode when a current taken by a load supplied by the converter is above a first current threshold, and in a low power mode when the current taken by the load is below the first current threshold, wherein the controller uses information about a switching time of the first switch in the first mode to control a switching time of the first switch in the low power mode.

Abstract: An electric power steering apparatus includes a power supply and a power supply management unit that controls an operation of the power supply. The power supply includes a main power supply, an auxiliary power supply connected in series to the main power supply, a boost circuit that charges the auxiliary power supply by boosting an output voltage of the main power supply and applying the boosted output voltage to the auxiliary power supply, and a voltage sensor that detects an output voltage of the auxiliary power supply. When a reduction amount per unit time of the output voltage detected by the voltage sensor exceeds a voltage reduction amount over a predetermined time, the power supply management unit determines that an abnormality has occurred in an output destination of the power supply.

Abstract: A voltage regulator includes: a comparator configured to compare a feedback voltage with a reference voltage to output an enable signal and operate based on a bias current; a pass transistor turned on according to the enable signal and configured to output an external power voltage as an output voltage; a voltage distribution circuit configured to distribute and output the output voltage to an input terminal of the comparator; and a bias current control unit configured to control an amount of the bias current supplied to the comparator based on the output voltage.

Abstract: A high voltage power source device includes piezoelectric transformers, each of the piezoelectric transformers being formed with a primary electrode and a secondary electrode on piezoelectric ceramics, receiving a primary voltage at the primary electrode, and generating a second voltage from the secondary electrode, switching elements, each of the switching elements driving a respective one of the piezoelectric transformers, and primary voltage supply devices, each of the primary voltage supply devices supplying the primary voltage to the primary electrode of the respective one of the piezoelectric transformers by driving the respective one of the switching elements when the secondary voltage is generated from the respective one of the second electrodes, wherein the respective one of the primary voltage supply devices supplies the primary voltage to the respective one of the primary electrodes by driving the respective one of the switching elements at the same frequency.

Abstract: A controller with a multi-function pin, adapted to control a converting circuit according to a control signal for converting an input voltage into an output voltage, is disclosed. The controller has the multi-function pin, an enable unit, an over-current detecting unit and a logic control unit. The enable unit is coupled to the multi-function pin for receiving an enable signal and activates the controller in response to the enable signal. The over-current detecting is coupled to the multi-function pin and determines an over-current value according to an over-current set resistance coupled between the multi-function pin and a voltage source. The over-current detecting unit generates an over-current protection signal according to the over-current value and a current flowing through the converting circuit. The logic control unit determines whether executing an over-current protection according to the over-current protection signal.

Abstract: A power conversion system and method includes a DC-DC converter and an auxiliary circuit configured to ensure that a minimum input voltage is provided to the DC-DC converter during power interruption and for at least a predetermined hold-up time period. The auxiliary circuit includes an energy storage device, an auxiliary energy source for charging the energy storage device, and a clamping circuit to limit the energy stored by the energy storage device to a threshold voltage. A discharge time of the energy storage device from the threshold voltage to the minimum voltage thereby exceeds the predetermined hold-up time, but is only incrementally greater such that the size of the energy storage device is substantially reduced. The auxiliary energy source may typically be a current source, with the clamping circuit being control logic effective to disable the current source as a voltage across the storage device approaches the threshold.

Abstract: The present invention includes a load-adaptive power generator including a feedback detecting module, a load determining module, a load driving module, and a control module. The feedback detecting module detects a load voltage of a load device, and converts the load voltage into a feedback voltage. The load determining module determines whether the feedback voltage is within a preset range for generating a periodical load driving signal. The load driving module has a plurality of driving units and at least one switch. The driving units drive the load device according to the load driving signal, and at least one driving unit receives the load driving signal through the switch. The control module turns on the switch when the frequency of the load driving signal is less than a frequency threshold. Accordingly, the load-adaptive power generator of the present invention can save energy.

Abstract: Circuits and methods to detect a threshold for entering and leaving a discontinuous current mode of a buck converter have been disclosed. A buck converter is switched to continuous mode if the filtered battery current has reached a defined threshold current Ithccm. In order to expedite the transition from DCM mode to CCM mode the time delay between two or more pulses of a current through an inductor is monitored and the buck converter is switched to CCM mode if this time delay is smaller than a defined threshold.

Abstract: A multi-mode pulse width modulation (PWM) controller for a buck switching regulator includes a multi-mode PWM control circuit where the PWM control circuit is configured to operate in one of multiple control schemes selectable by a mode select signal. In one embodiment, the multi-mode PWM control circuit incorporates a peak current mode control scheme, a voltage mode control scheme, and a valley current mode control scheme. In another embodiment, the multi-mode PWM control circuit further incorporates a constant ON-time control scheme.

Abstract: A DC-DC converter, having an input voltage and an output voltage, includes an inductor and a switch switching the input voltage to an input side of the inductor, where a feedback path controlling initiation of closing the switch includes capacitive coupling of the voltage at the input side of the inductor.

Abstract: Disclosed is a DC-DC power conversion apparatus (10) including two or more switching units (SU1, SU2) each of which further includes two semiconductor switching elements (Sa, Sb), and wherein each of the semiconductor switching elements (S1a, S1b, S2a, S2b) of each of the switching units are all connected in series, and which also includes an energy transition capacitor (C1) for conducting charging/discharging, and an inductor (L). The DC-DC power conversion apparatus (10) is also provided with a control unit that makes the semiconductor elements execute operations in four types of switching modes, according to the ratio (V2/V0) of the input/output voltages of the power conversion apparatus and the direction of the power transmission, and that also makes the elements carry out a current-discontinuing operation wherein the inductor current will become zero during switching operation, upon low load.

Abstract: An embodiment of a driving device is proposed for supplying at least one regulated global output current to a load. The driving device includes programming means for programming a value of the global output current within a global current range. Reference means are provided for supplying a reference voltage, which has a value corresponding to the value of the global output current. Conversion means are then used for converting the reference voltage into the global output current. The conversion means may further include a plurality of conversion units for corresponding partial current ranges, which partition the global current range.

Abstract: In accordance with an embodiment, a controller for a switched mode power supply includes an average current comparator that determines whether an average current within the switched mode power supply is below a current threshold, and a switch signal generation circuit coupled to the average current comparator having switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply. The switch signal generation circuit produces a first switching pattern in a first mode of operation and produces a second switching pattern a second mode of operation. When the average current comparator determines that the average current is below the current threshold, the switch signal generation circuit is operated in a first mode, and when the average current comparator determines that the average current is not below the current threshold, the switch signal generation circuit is operated in a second mode.

Abstract: A power supply system includes a control unit comprising a detecting and converting unit that is operable to generate a detected current based on a difference between a set voltage and a voltage representative of a current flow through an energy storage member.

Abstract: The present invention discloses a method and an apparatus for power control. An apparatus for power control in accordance with an embodiment of the present invention can include: a voltage comparing part configured to compute an error voltage by using a measured voltage measured at the generator and a reference voltage that is designated; a control module configured to compute a first reactive power value for power control of the generator by being inputted with the error voltage; and a driving module configured to compute a reference reactive power value by using the first reactive power value and a second reactive power value computed using an active power value of the power converter and configured to control the power converter in correspondence with the computed reference reactive power value.

Abstract: A control circuit in a PFM/PWM boost switching regulator includes a timer based PFM exit control circuit configured to receive a first control signal for controlling a main power switch, a zero-cross signal indicative of an inductor current having reached zero current value, and a timer reference signal indicative of a timer threshold duration. The timer based PFM exit control circuit assesses an idle time of the inductor current based on the first control signal and the zero-cross signal where the idle time is the time period when the inductor current has the zero current value. The timer based PFM exit control circuit asserts the PFM exit signal in response to the idle time being equal to or less than the timer threshold duration, and the boost switching regulator transitions out of the PFM mode and into the PWM mode in response to the PFM exit signal being asserted.

Abstract: A multiphase DC-DC converter is provided that includes a multiphase transformer, the multiphase transformer including a plurality of input voltage terminals and an transformer output voltage terminal, each input voltage terminal associated with a corresponding phase. Each phase is assigned to an input voltage terminal of the plurality of input voltage terminals to minimize a ripple current at the input voltage terminals of the multiphase transformer.

Abstract: A switching regulator and control method for the same. The switching regulator employs a hybrid mode. A ramp voltage signal is added to the current sense signal to make the ramp voltage signal overtake the current information when the duty cycle becomes low.

Abstract: A power supply includes a drive signal generator to generate a drive signal to control a switching of power switch. A feedback circuit is coupled to receive a feedback signal representative of the output to generate a control signal. An oscillator circuit is coupled to generate an oscillating signal in response to the control signal, from which the drive signal is generated in response. A frequency of the oscillating signal increases from a first frequency to a second frequency with respect to the control signal for a first range of control signal values, remains substantially equal to the second frequency for a second range of control signal values, and decreases from the second frequency to a third frequency with respect to the control signal for a third range of control signal values. The first range is less than the second range, which is less than the third range.

Abstract: A switching regulator comprises a PWM controller that controls switching of a power converter via a PWM control signal. The switching regulator detects load transients in the load driven by the power converter. Responsive to the detection of a load transient, the switching regulator resets a PWM clock synchronously with a fast clock operating at a higher frequency than the PWM clock. By doing so, the switching regulator beneficially responds more quickly to changes in the load than with conventional architectures that utilize only the slower PWM clock. This provides improved transient response without sacrificing power efficiency.

Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.

Abstract: A hysteretic power converter constituted of: a switched mode power supply; a hysteretic comparator, a first input of the comparator arranged to receive a feedback signal providing a representation of the output voltage of the switched mode power supply and a second input of the comparator arranged to receive a reference voltage; a ramp capacitor coupled to one of the first and second input of the comparator; a current source, a terminal of the current source coupled to the ramp capacitor and arranged to drive current to the ramp capacitor; and a switchable current source, a terminal of the switchable current source coupled to the ramp capacitor, the switchable current source arranged to drive current to the ramp capacitor in a direction opposite the current driven by the current source, wherein the switchable current source is alternately enabled and disabled responsive to the output of the hysteretic comparator.

Abstract: A current-mode controlled power converter (1) comprises a controllable switch (S3) which is coupled to an inductor (L1) to obtain a periodical current (I1) through the inductor (L1). A current feedback loop (2, 3, 4, 5) generates a current-error signal (CE) which is a difference between a set current level (SC) and a level of a sensed current (SE) in the power converter (1). A driver (9) for switches off the controllable switch (S3) when the current error signal (CE) indicates that the level of the sensed current (SE) has reached the set current level (SC). A voltage feedback loop (10, 3, 7, 8, 5) influences the set current level (SC) in response to a level of an output voltage (Vout) of the power converter (1).

Abstract: An apparatus and method for a boost power converter with improved electrical overstress (EOS) tolerance is disclosed. A boost power converter provides a providing a pulse width modulation (PWM) boost power converter with an electrical overstress (EOS) boost over-voltage comparator/switch network comprises a boost power converter, a boost overvoltage comparator, a boost overvoltage comparator feedback network, and a boost overvoltage switch. The methodology for the boost converter with improved electrical overstress (EOS) tolerance defines an absolute maximum voltage condition, provides a voltage limit below the defined absolute maximum voltage condition, and initiates turn-on of the boost overvoltage switch according to the voltage limit.

Abstract: A power supply unit has a first power supply circuit that supplies a voltage to a load driving unit and a second power supply circuit that supplies a voltage to circuits other than the load driving unit. A first switching unit connects any one of a power supply that supplies a power supply voltage and a voltage step-down circuit that supplies a step-down voltage of the power supply voltage to the first power supply circuit. A second switching unit connects any one of the power supply and the voltage step-down circuit to the second power supply circuit. A control unit controls the connection by the first switching unit and the connection by the second switching unit to switch the voltage supplied to the first power supply circuit and the voltage supplied to the second power supply circuit in accordance with properties of the load driving unit.

Abstract: An electronic circuit (EC) may include an integrated current-source with an output terminal that may couple to the output of a power converter (OPC) to draw current from the power converter. The EC may further include control circuitry for activating the integrated current-source and for effecting a ramping output voltage at the OPC, and begin current-sense calibration once the output voltage reaches a specified calibration voltage value (SCVV). The control circuitry may regulate the output voltage to the SCVV while current-sense calibration is being performed, to measure and store the resistance value of a current-sense element of the power regulator. With the current-sense calibration complete, the control circuitry may disable the integrated current-source, resume ramping the output voltage until it reaches a specified regulation value (SRVV), and regulate to the SRVV during normal operation. The SCVV is specified to be at least a magnitude lower than the SRVV.

Abstract: A bypass low dropout regulator has a pass gate coupled to a voltage rail. The pass gate receives a pass gate control signal on a pass gate control line and controllably drops a voltage from a rail to a regulated output in accordance with the pass gate control signal. A differential amplifier generates the pass gate control voltage using a reference and feedback from the regulated output. A bypass switch selectively bypasses the regulator control signal, in response to a bypass signal, by placing a pass gate ON voltage on the pass gate control line. Optionally, and ON-OFF mode circuit selectively disables the pass gate in response to a system ON-OFF signal.

Abstract: A embodiment relates to a current estimation circuitry for a converter comprising: an integrator for integrating a voltage across an inductor of the converter; a current sense unit for obtaining a signal that is associated with the current flowing through at least one of the electronic switches of the converter; and a control unit for adjusting at least two parameters of the integrator based on comparing the output of the integrator with the signal provided by the current sense unit.

Abstract: A controller for a switch mode regulator with discontinuous conduction mode (DCM) correction which includes a correction network and a modulator. The correction network detects a low load condition indicative of regulation error during DCM and asserts an adjust value indicative thereof. The modulator receives the adjust value and adjusts operation accordingly to improve regulation during DCM. The correction network receives or determines a regulation metric, such as periods between successive pulses of a pulse control signal, or a current sense signal indicative of load current, and compares the regulation metric with one or more thresholds for determining the level of adjustment. Adjustment may be made using one or more methods, such as adjusting pulse on-time, adjusting pulse off-time, adjusting frequency of operation, etc.

Abstract: A current resonance power supply includes a current detecting unit detecting a current flowing through a primary side of a transformer and a current compensating unit compensating the current detected by the current detecting unit in accordance with a variation in voltage input into the primary side of the transformer. The current resonance power supply detects overcurrent on the basis of an output from the current compensating unit.