2602results about "Apparatus without intermediate ac conversion" patented technology

The invention relates to a power supply module which comprises an inductance circuit, a switch circuit, a check driving circuit and a controller, wherein the inductance circuit is provided with an inductor and a voltage feedback line, and the voltage feedback line feeds back the end voltage of the inductor. The switch circuit is electrically connected with the inductance circuit to drive the inductance circuit. The check driving circuit is electrically connected with the switch circuit and the voltage feedback line, and the check driving circuit controls the switch circuit and generates a current feedback signal according to the end voltage of the inductor. The controller is electrically connected with the check driving circuit, and controls the check driving circuit according to the current feedback signal.

Described are concepts, systems, system architectures, circuits, methods, and techniques directed toward power management and control. In particular, described are concepts, systems, system architectures, circuits, methods, and techniques for implementing power converters that may not have a right-hand pole zero in their linearized, averaged control-to-output transfer function, but that may still have buck and boost functionality.

In accordance with some embodiments of the present disclosure, a multi-level power converter circuit includes a flying capacitor, a balancing capacitor to control a voltage across the flying capacitor, a plurality of converter switches, a control switch coupled between the flying capacitor and the balancing capacitor, and control circuitry to open and close the control switch based on states of at least two converter switches of the plurality of converter switches. In some embodiments, the multi-level power converter is a three-level buck converter, and the balancing capacitor maintains a voltage across the flying capacitor to be within a threshold range of half the input voltage of the buck converter. In some embodiments, a method for operating the multi-level power converter includes using control circuitry to operate the plurality of converter switches and the control switch to selectively couple the balancing capacitor to either side of the flying capacitor.

This application relates to methods and apparatus for switched mode drivers. A BTL driver has a switch network operable in different switch states, wherein, in each switch state, each of first and second output nodes is connected to a respective one of a first switching voltage, a second switching voltage or an intermediate switching voltage between the first and second switching voltages which is provided by a driver capacitance. A controller is configured to control the switch network to operate in a sequence of switch states to generate a differential drive signal based on an input signal. The controller is configured such that operation of driver switch network in said sequence of switch states to generate said differential drive signal provides voltage regulation of the intermediate voltage provided by said driver capacitance.

A reconfigurable flying capacitor multilevel input stage accepts a wide range of input voltages. The input stage divides and inverts a DC input voltage. Generally, output voltage regulation is achieved by adjusting the power switches' duty ratio in the input stage for non-resonant converters and by adjusting the switching frequency for resonant converters.

The present invention provides a topology, method and system for bi-directional power conversion of excitation power supply for power battery testing, wherein the topology comprises a three-phase PWM (pulse width modulation) converter, a high-frequency isolation three-level LLC (logical link control) resonant converter and a DC-DC (direct current) converter forming a topology structure for a three-stage power conversion; an input end of the three-phase PWM converter is connected to a power grid side; the high-frequency isolation three-level LLC resonant converter is connected between the three-phase PWM converter and the DC-DC converter in series and is configured for realizing bi-directional DC voltage conversion and isolation, and to raise a busbar voltage between the high-frequency isolation three-level LLC resonant converter and the DC-DC converter; and, the DC-DC converter is configured to generate charging and discharging excitation currents for a power battery testing.

A reconfigurable, for example with time, network switch matrix coupling switch charge circuits representing multiply and add circuits (MACs) and neurons (MACs with activations) capable of accepting and outputting proportional to charge pulses through crossbars within said network, said crossbars controlled by local controllers and higher level controllers to setup said crossbar communications.

The invention provides a multi-path self-adaptive constant-voltage constant-current charging device, and the device comprises an input module which comprises a plurality of paths of input power supplies with the same rated voltage and limited power; the summarizing module is connected with each path of input power supply and combines the input power supplies into a single path for output; the conversion module is connected with the gathering module and is used for converting the single-path output voltage into target voltage and realizing constant-voltage output through a feedback loop; the detection module is connected with the input module and is used for detecting the effective path number of the input power supply and outputting a signal; and the control module dynamically adjusts the gain of the amplification circuit according to the output signal, and realizes constant current output by combining the current feedback of the conversion module. The summarizing module solves the problems of cost and size; the detection module and the control module jointly improve efficiency and stability; and meanwhile, a dynamic adjusting mechanism of the control module ensures constant-voltage and constant-current output under different input conditions. The modules operate cooperatively, so that the charging device is superior to the prior art in expansibility, efficiency and stability.

The present invention discloses a multi-phase converter circuit, which includes at least one two-phase converter circuit coupled between a first voltage and a second voltage, and employs switching control of at least one capacitor and at least one coupled inductor, with alternated charging phase and discharging phase, to achieve power conversion between the first voltage and the second voltage.

This disclosure provides a charge pump circuit. The charge pump circuit according to this disclosure includes one or more cascaded boost units and output units having the same structure. Each boost unit has a dual-branch structure with top and bottom symmetry and connected to two sets of four-phase clock signals with opposite clock phases. By adjusting the phase relationship of the four-phase clocks, the rise time of the gate voltage of the transfer transistor can be delayed by advancing the falling edge of the driving clock of the secondary capacitor and delaying its rising edge. This ensures that the transfer transistor is in the off state at the moment of high-low phase switching, thereby avoiding the problem of reduced charge transfer efficiency caused by reverse charge flow between the input and output nodes of the boost unit.

A voltage conversion system includes user interface circuitry disposed on the voltage conversion system. The user interface circuitry is configured to input at least one electrical parameter based on user input. At least one parameter of the at least one electrical parameter comprises a plurality of adjustable values and corresponds to a conductor resistance of electrical conductors coupled to the voltage conversion system. Each adjustable value of the at least one parameter corresponds to a range of two or more values. The voltage conversion system includes conversion circuitry configured to generate an adjusted direct current (DC) voltage from an input DC voltage based on the at least one electrical parameter.

Described are concepts, systems, system architectures, circuits, methods, and techniques directed toward power management and control. In particular, described are concepts, systems, system architectures, circuits, methods, and techniques for implementing power converters that may not have a right-hand pole zero in their linearized, averaged control-to-output transfer function, but that may still have buck and boost functionality.

A correction circuit for a switching converter counters undesired reduction of switching frequency in response to a decrease in a load current at a converter output node. Detection circuitry receives a reference clock signal indicative of a lower bound for the switching frequency of the converter and a pulsed drive signal indicative of the switching frequency of the converter. In response to the switching frequency of the converter falling below said lower bound for the switching frequency of the converter, the detection circuitry produces an error signal. Current sink circuitry coupled to the output node of the converter sinks from the output node of the converter corrective current in response to receipt of the error signal from the detection circuitry.

A DC / DC converter and a voltage gain switching method and system. A first resonance unit of the DC / DC converter includes a first terminal and a second terminal connected to a second capacitor unit, and a third terminal and a fourth terminal connected to a first capacitor unit. A second resonance unit of the DC / DC converter includes a first terminal connected to a second terminal of the second capacitor unit, and a second terminal of the second resonance unit connected to a first input / output terminal of the DC / DC converter, a third terminal connected to the ground terminal of the DC / DC converter, and a fourth terminal connected to a first voltage gain changeover switch. The DC / DC converter can improve voltage gain switching efficiency.

Described are concepts, systems, system architectures, circuits, methods, and techniques directed toward power management and control. In particular, described are concepts, systems, system architectures, circuits, methods, and techniques for implementing power converters that may not have a right-hand pole zero in their linearized, averaged control-to-output transfer function, but that may still have buck and boost functionality.

The present disclosure provides a switched-capacitor voltage converter, a chip, and an electronic device. In the switched-capacitor voltage converter, a first branch, a second branch, a third branch, and a fourth branch are electrically connected between an input terminal and a ground terminal of the switched-capacitor voltage converter, and are further electrically connected to an output terminal of the switched-capacitor voltage converter. Transistors in the first branch and the second branch are configured to be simultaneously turned on or turned off and of different sizes, and transistors in the third branch and the fourth branch are configured to be simultaneously turned on or turned off and of different sizes. When the output terminal of the switched-capacitor voltage converter is electrically connected to a small load, the transistors in the branches may be controlled to be turned off, such that loss of the switched-capacitor voltage converter is effectively reduced.

Described are concepts, systems, system architectures, circuits, methods, and techniques directed toward power management and control. In particular, described are concepts, systems, system architectures, circuits, methods, and techniques for implementing power converters that may not have a right-hand pole zero in their linearized, averaged control-to-output transfer function, but that may still have buck and boost functionality.

A charge pump device includes a voltage adjustment unit, an output capacitor, a first output unit and a second output unit. The voltage adjustment unit performs voltage pumping or voltage reducing operation on a power supply voltage according to first to fourth control signals, a positive pump voltage and an negative pump voltage to generate a first voltage adjustment output and a second voltage adjustment output at a first node and a second node respectively. The output capacitor has a first output terminal and a second output terminal. When the first output unit is turned on, the first voltage adjustment output charges the output capacitor through the first output unit, so that the first output terminal generates the positive pump voltage. When the second output unit is turned on, the second voltage adjustment output charges the output capacitor through the second output unit, so that the second output terminal generates the negative pump voltage. When the first output unit is turned on, the second output unit is not turned on. When the second output unit is turned on, the first output unit is not turned on.

The invention relates to a multi-level pulse power supply and semiconductor process equipment. The multi-level pulse power supply comprises a high-frequency isolation conversion module and a switch module, wherein the high-frequency isolation conversion module is electrically connected with the switch module; the high-frequency isolation conversion module is used for accessing a direct-current bus voltage and performing voltage conversion processing on the direct-current bus voltage to generate a plurality of pre-processing voltages; and the switch module is used for responding to an externally input control signal and switching the state of the switch module so as to perform voltage amplitude modulation based on the plurality of pre-processing voltages and output a target voltage. The multi-level pulse power supply can output multi-level pulses.

The invention relates to an IGBT parallel current sharing control circuit and method for turn-off transient current change rate detection, and the circuit employs a PCB Rogowski coil probe to carry out the non-contact detection of the turn-off current change rate of a parallel device, thereby accurately judging the non-current sharing characteristic of the parallel device. The problem of integrated design of a traditional detection scheme in large-current and high-power-density application is effectively solved; meanwhile, by designing a current change rate peak holding circuit, the holding time of a peak signal is remarkably prolonged, and the performance requirement on the ADC sampling rate is greatly reduced; a reset branch is additionally arranged for the peak holding circuit, and the peak output value in the last period is zeroed in the turn-on transient state by using a driving signal, so that the charge accumulation effect is effectively eliminated, and the sampling precision of the system is guaranteed; the regulation and control part of each parallel branch only needs to be additionally provided with two passive elements including the control switch and the capacitor, current sharing control can be achieved by adjusting the access time of the bypass branch, the structure is simple, cost is low, and good popularization applicability is achieved.

A charge pump circuit of a semiconductor memory device, which may include a first pumping stage that includes a first pumping capacitor and a second pumping capacitor, a first transfer stage that transfers a voltage of the first pumping capacitor when a clock signal is at a high level or transfers a voltage of the second pumping capacitor when a inverse clock signal is at the high level, a second pumping stage that includes a third pumping capacitor and a fourth pumping capacitor, and a second transfer stage that transfers a voltage of the third pumping capacitor when the clock signal is at the high level or transfers a voltage of the fourth pumping capacitor when the inverse clock signal is at the high level. The second transfer stage may output multiple times of the input voltage.

A DC-DC converter for converting an input voltage at an input node, the converter comprising: first and second inductor nodes for connection of an inductor therebetween; first and second flying capacitor nodes for connection of a flying capacitor therebetween; a first switching network for selectively connecting the first flying capacitor node to each of the input node and the first inductor node; a second switching network for selectively connecting the second flying capacitor node to each of the input node and a reference voltage node; and reservoir circuitry, comprising: first and second reservoir capacitor nodes for connection of a reservoir capacitor therebetween; a third switching network for selectively connecting the first reservoir capacitor node to each of the first and second flying capacitor nodes; a fourth switching network for selectively connecting the second reservoir capacitor node to each of the second flying capacitor node and the reference voltage node.

The invention provides a charge pump circuit and a chip, in the charge pump circuit, a sampling circuit, a feedback circuit and a clock generation circuit are sequentially coupled and are coupled with a first charge pump and a second charge pump to form a loop, and in the initial stage of establishing the output of the charge pump circuit, the sampling circuit is used for carrying out primary charging on the output end of the charge pump circuit; when the input voltage rises to a corresponding value, the first charge pump and the second charge pump work at the same time, and when the voltage of the output end of the charge pump circuit reaches a target value, one of the first charge pump and the second charge pump stops working, so that the power consumption of the charge pump circuit in a steady state is effectively reduced; sectional charging and self-adaptive adjustment of a working mode are realized, and the vast majority of charging processes in an output establishment stage are completed by using an input voltage, so that the load pressure in the charge pump circuit is reduced. In addition, the sampling circuit also realizes parallel voltage sampling and ripple sampling, and the transient response capability of the charge pump circuit is enhanced.

A first converter includes first to fourth switching elements connected in series from a reference node toward a node fed with an input voltage, a flying capacitor, an intermediate capacitor, and a first inductor. The intermediate capacitor is provided between a connection node between the second and third switching elements and the reference node. The second converter includes a switching output stage connected to the connection node between the second and third switching elements, and a second inductor. A control circuit produces an output voltage lower than the input voltage by controlling the states of the switching elements and of the switching output stage.

A circuit comprises a first half-bridge power stage including a first set of switches and a second half-bridge power stage including a second set of switches. The circuit further comprises a first power source and a second power source that are coupled to the first and second half-bridge power stages for supplying a first direct current (DC) voltage and a second DC voltage, respectively. The circuit further comprises an output interface coupled to the first and second half-bridge power stages and configured to couple to a speaker load. The first and second half-bridge power stages are configured to generate a five-level differential signal for driving the speaker load. Each set of switches includes a respective first subset of switches configured to operate at a first voltage level and a respective second subset of switches configured to operate at a second voltage level.

The invention discloses a voltage conversion module, a chip, electronic equipment and a circuit control method, and belongs to the technical field of circuits. The voltage regulation circuit comprises a battery module and a load, and under the condition that the battery module provides a first voltage within a first preset voltage range for a voltage conversion module, the voltage conversion module is used for reducing the first voltage provided by the battery module and outputting a second voltage, maintaining the second voltage stable or maintaining the voltage reduction ratio between the first voltage and the second voltage stable; and under the condition that the battery module provides a third voltage in a second preset voltage range for the voltage conversion module, the voltage conversion module is used for boosting the third voltage provided by the battery module and outputting a fourth voltage to maintain the fourth voltage stable or maintain the boosting ratio between the third voltage and the fourth voltage stable. And the flexibility of adjusting various input voltages by the voltage conversion module is improved.

One embodiment relates to A DC / DC converter for boosting an input voltage to a desired voltage and outputting same, comprising: a boost converter for boosting an input voltage to a first voltage; a voltage drop pump for reducing the input voltage to a second voltage; and a charge pump connected to the boost converter and the voltage drop pump, wherein the charge pump generates, as an output voltage, on the basis of the first voltage that is input from the boost converter and the second voltage that is input from the voltage drop pump, a third voltage boosted to be higher than the input voltage.

The invention relates to a circuit arrangement (12) for which an input voltage U is provided. E to a predetermined output voltage U A to increase. The circuit arrangement (12) comprises an electric charge pump, configured to alternately charge a first capacitor (16) with the input voltage U in a first operating step by means of a switching device (21) at a frequency f. E to charge and in a second step connect the first capacitor (16) to the input voltage U Eto connect in series. A microcontroller (20) is configured to control the switching device (21) and, within the first operating step, to set a capacitor charging time independent of the duration of the first operating step, wherein the capacitor charging time specifies a duty cycle T as the ratio of the capacitor charging time to one period of the frequency f, and the microcontroller (20) is configured to control the output voltage U A by varying the duty cycle T.

The invention relates to a charge pump circuit, a modulation method of the charge pump circuit and electronic equipment. The charge pump circuit comprises a charge pump module, a driving module, an obtaining module and a frequency adjusting module. The charge pump module is used for connecting a load and is configured to output a target voltage to the load in response to the adjusted target switching frequency based on the power supply voltage. And the driving module is connected with the charge pump module and is configured to respond to the adjusted target switching frequency to drive the charge pump module. The acquisition module is configured to acquire a pre-input signal corresponding to a load. And the frequency regulation module is connected with the acquisition module and the driving module, and is configured to regulate the magnitude of the target switching frequency in real time according to the pre-input signal. The switching frequency of the charge pump can be dynamically regulated and controlled, so that the output efficiency of the charge pump circuit is improved, and electromagnetic interference and switching loss are avoided.

A switch control method is applied to a hybrid voltage converter including a switched capacitor unit and a freewheeling unit. The method including obtaining the output current of the hybrid voltage converter, when the output current is greater than a first current threshold, controlling the switches in the hybrid voltage converter to operate in parallel conduction mode, when the output current is less than the first current threshold, controlling the switches in the hybrid voltage converter to operate in sequential conduction mode. When the switches operate in parallel conduction mode, N switches in the switched capacitor unit are controlled to turn on and off with the same duty cycle and a phase shift of 360 / N degrees. When the switches operate in sequential conduction mode, each switch in the switched capacitor unit is controlled to conduct individually with the same duty cycle in sequence.