42 results about "Buck power converter" patented technology

A bi-directional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.

A power converter includes a first conversion stage for converting an input voltage to a first output voltage and a second conversion stage for converting the first output voltage to a second output voltage. An error signal is generated according to a reference voltage and a feedback signal extracted from the second conversion stage, and a feed forward signal is generated from the error signal and injected into the first conversion stage to stabilize the first output voltage. The feedback signal is a function of the second output voltage and thus, the error signal varies with the second output voltage. As a result, the first output voltage will be stabilized when the second output voltage varies, due to the varied feed forward signal.

A current sense and feedback circuit is provided for a non-isolated Buck power converter to maintain constant current load regulation. The Buck converter may have a high side power switch and may include an input port, a switcher unit including a switch and a controller, an inductor coupled to the output, and a freewheeling diode for circulating the inductor current when the switch is open. The simplified current sense and feedback circuit of the power converter may include a current sense resistor module coupled to the freewheeling diode to provide a sense signal to the controller. The controller may also be coupled to the output of the power converter to sense an over voltage condition. The simplified current sense and feedback circuit may provide output regulation while maintaining a low component count, small size, and low loss that makes the power converter suitable for use in compact design applications.

A novel method to operate and control single inductor multiple output switching power converter is presented. The method includes the means for generating one or more synthetic ripple signals and operating the converter at constant switching frequency allowing high frequency operation, maintaining stability in all conditions with minimum cross regulation between the outputs independently on the levels of load present at the outputs. The method further includes means for setting the maximum frequency of multiplexing the energy stored in the inductor between the various outputs reaching the desired compromise between the value of the output capacitors, the switching frequency of the output power devices and the acceptable output voltage ripple.Two different topologies are proposed that can be used for single inductor multiple output buck power converters and for boost power converter allowing the extension to buck-boost configurations as well.

A novel switching hysteretic bidirectional power converter is presented. The converter includes the generation of a synthetic ripple signal and feedback networks to hysteretically control the power converter both when the converter operates as a boost converter with the flow of power in one direction, and when the converter operates as a buck power converter with the flow of power in the opposite direction.The presented approach provides a switching converter with a much simpler control method with respect to conventional inductive bidirectional power converters. The hysteretic control provides stable operation in all conditions with excellent load and line transient response. Furthermore this allows the operation of the bidirectional power converter with much higher switching frequencies with respect to state of the art conventional approaches, thus reducing the cost and size of the passive components storing energy during the conversion.Since bidirectional switching power converters are used mainly when the flow of power is bidirectional, the typical application involves the charging and discharging of batteries, and as part of this novel approach, an hysteretic battery charger including hysteretic constant current and constant voltage control is introduced as part of a larger bidirectional switching power converter.

A DC-DC buck converter in multi-die package is proposed having an output inductor, a low-side Schottky diode and a high-side vertical MOSFET controlled by a power regulating controller (PRC). The multi-die package includes a first die pad with the Schottky diode placed there on side by side with the vertical MOSFET. The PRC die is attached atop the first die pad via an insulating die bond. Alternatively, the first die pad is grounded. The vertical MOSFET is a top drain N-channel FET, the substrate of Schottky diode die is its anode. The Schottky diode and the vertical MOSFET are stacked atop the first die pad. The PRC is attached atop the first die pad via a conductive die bond. The Schottky diode die can be supplied in a flip-chip configuration with cathode being its substrate. Alternatively, the Schottky diode is supplied with anode being its substrate without the flip-chip configuration.

A switched-mode buck power converter includes a power source, a first switch, an inductor for storing energy, a diode or second switch, and control circuitry. The inductor has a first end connected to an output node of the power converter, wherein the first switch is connected between the power source and a second end of the inductor. The diode or second switch is connected, at the second end of the inductor, between the first switch and a common node of the power converter. The control circuitry is configured to (i) characterize per cycle energy demand of the power converter, (ii) characterize per cycle inductive energy of the power converter, and (iii) compare the characterized energy demand to the characterized inductive energy to control the first switch.

Disclosed is a buck power converter. The buck power converter comprises a power transistor, an inductor, a first diode and an anti-ringing circuit. The power transistor is provided with a first end, a second end and a control end. The first end receives an input voltage. The control end receives a pulse-width modulation signal. The anti-ringing circuit detects a detection voltage at the second end of the power transistor, and according to the detection voltage, provides at least one second diode for series connection between the second end of the power transistor and a reference grounding end in a forward bias mode so as to clamp the voltage value of the detection voltage.

A DC-DC power converter, a control component of a DC-DC power converter, and a method of controlling a buck DC-DC power converter are provided. The method includes receiving at least one of a measured load current and a measured input voltage. The measured load current is a measurement of current that flows from the buck inductor of a physical component of the buck DC-DC power converter. The measured input voltage is a measurement of the DC link input voltage measured across a DC link of the physical component of the buck DC-DC power converter. The method further includes generating a control signal to control a pulse width modulator (PWM), wherein the control signal is based on at least one of the measured load current and the measured input voltage. The PWM is configured to control at least one switch that is coupled to the buck inductor to allow the buck inductor to operate on a current flowing from the DC link only when the at least one switch is turned ON.

A DC-DC power converter, a control component of a DC-DC power converter, and a method of controlling a buck DC-DC power converter are provided. The method includes receiving at least one of a measured load current and a measured input voltage. The measured load current is a measurement of current that flows from the buck inductor of a physical component of the buck DC-DC power converter. The measured input voltage is a measurement of the DC link input voltage measured across a DC link of the physical component of the buck DC-DC power converter. The method further includes generating a control signal to control a pulse width modulator (PWM), wherein the control signal is based on at least one of the measured load current and the measured input voltage. The PWM is configured to control at least one switch that is coupled to the buck inductor to allow the buck inductor to operate on a current flowing from the DC link only when the at least one switch is turned ON.

An ultra-high-speed generator rectifier based on automatic energy consumption matching belongs to the field of power electronic converters. The invention solves the problem of energy mismatch between the independent power supply system for power generation and the load when the existing generator supplies power to the load by outputting a constant voltage through the electric energy converter. It includes three-phase rectifier bridge, buck step-down power converter, energy consumption matching circuit, drive circuit, controller and No. 1 capacitor C1; buck step-down power converter includes No. 1 power switch tube, No. 2 power switch tube, inductor and No. 2 capacitor C2; the energy consumption matching circuit includes No. 3 power switch tube and resistor R, the three-phase current input terminal of the three-phase rectifier bridge is connected with the three-phase current output terminal of the ultra-high-speed generator, and the positive pole power supply output of the three-phase rectifier bridge The terminals are simultaneously connected with one terminal of the No. 1 capacitor C1, the bus voltage signal input terminal of the controller, the positive power supply input terminal of the No. 1 power switch tube, and the positive power supply input terminal of the No. 3 power switch tube. It is mainly used in the field of generator rectification.

The invention discloses a method for improving the interactive interference of a buck power converter. The power converter comprises a first switching stage and a second switching stage, wherein the first switching stage converts an input voltage into a first output voltage, and the second switching stage converts the first output voltage into a second output voltage. The method is characterized in that the method comprises the following steps: 1. according to a reference voltage and a feedback voltage, producing an error signal, wherein the feedback voltage is the function of the second output voltage; and 2. producing a forward feed signal to the first switching stage from the error signal so as to stabilize the first output voltage. In the invention, the buck power converter capable of improving interactive interference and the method thereof have the advantage of improving the interactive interference between the output ends of the power supplies.