A method includes turning on a first group of switches of a switched capacitor converter in a battery charging system to establish a first conductive path, and configuring a system voltage at a system bus to charge a first flying capacitor to a predetermined voltage level through the first conductive path, wherein the predetermined voltage level is less than the system voltage, and turning on a second group of switches of the switched capacitor converter in the battery charging system to establish a second conductive path to charge a battery, wherein a sum of a voltage across the first flying capacitor and the system voltage is applied to the battery.

A circuit that increases input voltage to higher output voltage connected to a variable frequency drive in an appliance. Several switching arrangements, timing, and safety mechanisms are in place to assist. When the circuit experiences high draw, high voltage output values of circuit decrease over time, but different aspects of the circuit can be constructed so that the amount of time required at a higher voltage does not exceed the amount of time in which the high voltage output is provided.

A switched capacitor voltage multiplication device has a rectifier with a DC input terminal and a DC output terminal and two pulse input terminals. A first flying capacitor is coupled to one of the pulse input terminals, while a second flying capacitor is coupled to the other pulse input terminal. A recycle resistor is coupled across the rectifier with a first resistor terminal coupled to one pulse input terminal and a second resistor terminal coupled to the other pulse input terminal.

A dual-stage boost converter is disclosed. The boost converter includes a charge pump and a boost stage. The charge pump is coupled between an input voltage source and the boost stage. The charge pump is coupled to receive the input voltage and configured to generate an intermediate voltage that is greater than the input voltage received from the input voltage source. The boost stage includes an inductor coupled to receive the intermediate voltage and is configured to generate an output voltage that is greater than or equal to the intermediate voltage.

A voltage regulator receives a reference voltage and generates a regulated voltage using a MOSFET having a gate terminal configured to receive a control voltage. A charge pump receives the regulated voltage and generates a charge pump voltage in response to an enable signal and a clock signal generated in response to the enable signal. The voltage regulator further includes a first switched capacitor circuit coupled to the gate terminal and configured to selectively charge a first capacitor with a first current and impose a first voltage drop on the control voltage in response to assertion of the enable signal. The voltage regulator also includes a second switched capacitor circuit coupled to the gate terminal and configured to selectively charge a second capacitor with a second current and impose a second voltage drop on the control voltage in response to one logic state of the clock signal.

Various embodiments of charge adjustment techniques for a switched capacitor power converter are described. In one example embodiment, briefly, charge adjustment techniques may include a technique to operate a charge pump so as to reduce electrical transient effects that may occur during charge pump transition operation between a first steady state charge pump operation with respect to a first configuration gain mode and a second steady state charge pump operation with respect to a second configuration gain mode. In some instances, electrical transient effects may occur during charge pump transition operation, at least in part, from a selectable adjustment of charge pump configuration gain with respect to a configuration gain mode.

Disclosed is a multi-stage charge pump. A first stage is controlled by a first clock signal. A second stage is controlled by a second clock signal, which has high and low states that are shifted relative to the high and low states of the first clock signal. The high and low states of the second clock signal can be higher than the high and low states, respectively, of the first clock signal for a positive charge pump and vice versa for a negative charge pump. Any additional stage is similarly controlled by an additional clock signal that is shifted with respect to the clock signal controlling the immediately preceding stage. By shifting the high and low states of clock signals controlling downstream stages, the need for series-connected or high voltage capacitors in the downstream stages is eliminated and circuit complexity and area consumption are reduced.

The present disclosure provides a bidirectional hybrid power converter that may include an input circuit consisting of an input power supply and input capacitor, a plurality of switches connected to each other, to input power supply to a set of passive electronic components, to ground and to an output circuit comprising one or more output terminals, each consisting of an output capacitance. The plurality of switches is connected directly or through passive electronic components in an arrangement to obtain a plurality of power converter networks for battery charging as well as other applications by reuse of a set of plurality of switches. The input power supply and the output load are referred to based on the direction of the power conversion flow, forward or reverse. The first terminal can be connected to both a power source as an input and load as an output.

A charge pump circuit includes an output stage coupled to an output, a pumping stage between an input and the output stage, and a control circuit that outputs control signals. A pumping stage transistor includes S/D terminals coupled to input/output terminals, capacitive devices between signal terminals and either a transistor gate or a S/D terminal, and diode devices including either the anode/cathode or cathode/anode coupled to the respective gate and S/D terminal. An output stage transistor includes S/D terminals coupled to an input terminal and the output. One control signal includes a transition from first to second logic levels at a first time and another control signal includes a transition from the first to second logic levels at a second time, and a period between the transitions is sufficiently small to cause a change in a voltage at the pumping stage S/D terminal to be less than 100 millivolts.

When a bias voltage of a substrate is generated, an output voltage of a charge pump is controlled at an appropriate level, resultingly reducing a consumption current. The charge pump generates a predetermined output voltage from a predetermined DC power supply. A clock generator outputs a clock for operating the charge pump. A voltage monitoring unit monitors the output voltage of the charge pump and controls the clock output from the clock generator such that the output voltage is maintained within a predetermined range. A voltage regulator generates the bias voltage from the output voltage of the charge pump.