Abstract: In an example, a device for operating a switching converter is configured to determine a set of perturbed duty cycle values for a converter. A perturbation sequence is superimposed simultaneously onto a duty cycle value for each phase of the converter to form the set of perturbed duty cycle values. The device is further configured to determine an output voltage of the converter that occurs when the converter operates based on the set of perturbed duty cycle values, determine a coefficient vector of system parameters for the converter based on the output voltage and the set of perturbed duty cycle values, and tune a controller based on the coefficient vector. The duty cycle value for each phase of the converter is based on a respective command duty cycle value of a set of command duty cycle values output by the controller.

Abstract: A method of operating a switched-mode power supply (SMPS) includes starting up the switched-mode power supply by determining a rate of increase of a duty cycle of a pulse width modulated (PWM) signal based on an input voltage and a switching frequency of the SMPS; and generating the PWM signal having the duty cycle in accordance with the determined rate of increase.

Abstract: A method and a temperature detection circuit are disclosed. An example of the method includes driving an alternating current with a first frequency into a battery and detecting an imaginary part of a battery impedance at the first frequency; driving an alternating current with a second frequency different from the first frequency into the battery and detecting an imaginary part of the battery impedance at the second frequency; and calculating an intercept frequency at which the imaginary part equals a predefined value at least based on the imaginary part obtained at the first frequency and the imaginary part obtained at the second frequency.

Abstract: Representative implementations of devices and techniques minimize switching losses in a switched capacitor de-de converter. Variable frequency control, including Pulse frequency modulation, is used to control switching based on an existing load. As an example, a system may include a direct current to direct current converter (dc-dc converter) including an energy storage element, switches coupled to the energy storage element, and a digital controller arranged to modulate a switch timing of at least one switch of the switches by adjustment of a transition of a signal pulse provided to adjust an impedance of the at least one switch based on a load coupled to an output of the dc-dc converter.

Abstract: Methods and apparatuses for determining a state of charge of a battery are provided, wherein measurements of a terminal voltage of the battery and stored precharacterization parameters are used for determining the state of charge.

Abstract: Devices and methods are provided related to modulated power supplies. The device includes an inductor. When a load is to be supplied with power, a terminal of the inductor is coupled to the load. When the load is not to be supplied with power, terminals of the inductor may be coupled with each other.

Abstract: Representative implementations of devices and techniques may minimize switching losses and voltage ripple in a switched capacitor de-de converter. A digital controller is used to control switching, based on an existing load. In some examples, the digital controller may insert a dead-time phase in a switching period, which may reduce voltage ripple for a low output load current. In other examples, the digital controller may adjust the conductance of a plurality of sub-switches, where the plurality of sub-switches may include one or more sub-switches that have a higher on-resistance than other sub-switches. For example, a sub-switch may have an on-resistance that is a multiple of the on-resistance of other sub-switches.

Abstract: Representative implementations of techniques and/or devices provide control of switching characteristics in a switched capacitor dc-dc converter. In various implementations, the switching characteristics are modified based on load characteristics (e.g., magnitude of the load current). The switching characteristics may be modified to reduce, minimize, or eliminate switching losses in the dc-dc converter.

Abstract: Representative implementations of devices and techniques minimize switching losses in a switched capacitor dc-dc converter. The slope of the charging and/or discharging phase may be modified, smoothing the transitions from charge to discharge and/or discharge to charge of the switched capacitor.

Abstract: In accordance with an embodiment, a method of operating a switched-mode power supply (SMPS) includes starting up the switched-mode power supply by determining a rate of increase of a duty cycle of a pulse width modulated (PWM) signal based on an input voltage and a switching frequency of the SMPS; and generating the PWM signal having the duty cycle in accordance with determined rate of increase.

Abstract: Representative implementations of devices and techniques minimize hot carrier stress in a switched capacitor dc-dc converter. Multi-switch arrangements may be used in conjunction with a timing scheme to stage power switch operation.

Abstract: A nonlinear converter, such as a DC-DC converter, includes a nonlinear controller configured to receive an output voltage and a current, and configured to generate a PWM signal. The PWM signal is generated based on setting the converter to a first phase associated with both buck and boost modes when a clock signal is asserted, and selecting a second phase associated with the buck mode of the converter, if a sliding function signal achieves a first predetermined relationship with respect to a buck threshold before a next clock signal is asserted, or selecting a third phase associated with the boost mode of the converter, if the sliding function signal achieves a second predetermined relationship with respect to a boost threshold before a next clock signal is asserted. The nonlinear converter may include a power stage configured to provide the output voltage and a coil current to the nonlinear controller.

Abstract: In a device, a pulse modulation switching logic is provided to generate switching signals of a pulse modulator so as to generate a pulse modulated signal with a first pulse modulation control parameter and a second pulse modulation control parameter. The first pulse modulation control parameter is controlled on the basis of a first control signal, and the second pulse modulation control parameter is controlled on the basis of a second control signal. A first control loop is provided to generate the first control signal from an output signal derived from the pulse modulated signal. A second control loop is provided to generate the second control signal on the basis of the output signal. The first and second control signals are applied to concurrently control the first and second pulse modulation control parameters.

Abstract: An overshoot compensation circuit for an input signal, having a slew rate detection circuit configured to detect a slew rate of the input signal; a run time circuit configured to initialize a predetermined run time when an absolute value of the slew rate of the input signal is greater than or equal to a predetermined threshold; and a low pass filter configured to decrease the slew rate of the input signal only during the predetermined run time.

Abstract: In one example, a method includes receiving a voltage value and comparing the voltage value to a reference voltage value to determine a delta voltage value. The method may also include determining a reference current value based on the delta voltage value. The method may also include receiving a current value and comparing the current value to the reference current value to determine a delta current value. The method may also include determining a threshold value based on the delta current value, where the threshold value is used to define a control signal that controls a power converter.

Abstract: In accordance with an embodiment, a method for controlling a switched-mode power supply (SMPS), includes receiving a measurement of a supply voltage input of the SMPS, determining a change in the supply voltage input over time based on receiving the measurement, comparing the determined change in the supply voltage input with a predetermined threshold value and applying a correction factor to an integrator within a feedback control loop of the SMPS based on the comparing.

Abstract: Representative implementations of devices and techniques minimize switching losses in a switched capacitor dc-dc converter. The slope of the charging and/or discharging phase may be modified, smoothing the transitions from charge to discharge and/or discharge to charge of the switched capacitor.

Abstract: Methods and apparatuses for determining a state of charge of a battery are provided, wherein measurements of a terminal voltage of the battery and stored precharacterization parameters are used for determining the state of charge.

Abstract: In one example, a method includes receiving a voltage value and comparing the voltage value to a reference voltage value to determine a delta voltage value. The method may also include determining a reference current value based on the delta voltage value. The method may also include receiving a current value and comparing the current value to the reference current value to determine a delta current value. The method may also include determining a threshold value based on the delta current value, where the threshold value is used to define a control signal that controls a power converter.

Abstract: Representative implementations of devices and techniques minimize switching losses in a switched capacitor dc-dc converter. The slope of the charging and/or discharging phase may be modified, smoothing the transitions from charge to discharge and/or discharge to charge of the switched capacitor.