The DC-DC converter includes: a switching element connected between an inductor and a power supply terminal; a pseudo ripple generation circuit configured to generate a pseudo ripple voltage depending on a ripple component that is generated in the output voltage, and a smoothed voltage by smoothing the pseudo ripple voltage; a comparison circuit configured to combine a first comparison result obtained by comparing the pseudo ripple voltage and the smoothed voltage to each other, and a second comparison result obtained by comparing a reference voltage and a feedback voltage obtained by dividing the output voltage to each other, and output a comparison result signal; and an output control circuit configured to control the switching element to be turned on and off based on the comparison result signal. The comparison circuit is configured to output only the second comparison result, as the comparison result signal, when a load becomes lighter.

The invention relates to a choke circuit and a bus power supply incorporating same. Such a coil choke circuit includes an inductor connected between a first input terminal and a first output terminal, a boost circuit connected between a second input terminal and a second output terminal for increasing the voltage level that is output by the second output terminal. A switching element is connected in parallel to the boost circuit for bypassing the boost circuit. Additionally, a comparator is connected between the first input terminal and the first output terminal for detecting a potential difference across the inductor; wherein in case the comparator detects a potential difference higher than a threshold, the switching element is controlled to be in an OFF state; and in case the comparator detects a potential difference lower than or equal to the threshold, the switching element is controlled to be in an ON state.

A signal driver circuit having an adjustable output voltage for a high-logic level output signal. The signal driver circuit includes a signal driver configured to output a first logic level signal having a first voltage and output a second logic level signal having a second voltage according to an input signal. A voltage controlled voltage supply coupled to the signal driver provides the first voltage for the first logic level signal. The magnitude of the first voltage provided by the voltage controlled voltage supply is based on a bias voltage. A bias voltage generator can be coupled to the voltage controlled voltage supply to provide the bias voltage.

Embodiments of a circuit for use with a DC-DC converter are disclosed. In an embodiment, a circuit for controlling frequency variation for a ripple based, constant-on time DC-DC converter, is discloses. The circuit includes a set/reset (SR) latch, a comparator configured to set the SR latch, and an on-time and frequency variation controller configured to reset the SR latch. The on-time and frequency variation controller includes a feedback loop configured to increase the rate at which a ramp voltage increases to reduce the time it takes for the ramp voltage to exceed a threshold voltage. Embodiments of a method for controlling frequency variation for a ripple based, constant-on time DC-DC converter are also disclosed.

A control circuit for switching converter has an ON signal generating circuit, an OFF signal generating circuit, a first comparator, a second comparator and a logic circuit. The switching converter has a high switch and a low side switch connected in series. The ON signal generating circuit provides an ON signal based on a reference signal and a feedback signal. The OFF signal generating circuit provides an OFF signal. The first comparator provides a first comparing signal based on a comparing result between a first threshold and a current through the high side switch. The second comparator provides a second comparing signal based on a comparing result between a second threshold and a current through the low side switch. The logic circuit provides a first switching signal to control the high side switch ON and OFF and a second switching signal to control the low side switch ON and OFF.

A system comprising an ambient energy source, a power supply, and a power storage device. The ambient energy source is coupled to a first terminal end of an inductor. The power supply is also coupled to the first terminal end of the inductor. The power storage device is coupled to a second terminal end of the inductor. The ambient energy source provides power through the inductor in a first direction to the power storage device. The power storage device provides power through the inductor to the power supply in a second direction opposite the first direction.

A power source apparatus includes a power input terminal to which input direct-current power is input from a power source; a first switching regulator coupled to the power input terminal and configured to supply, to a first electronic component, first direct-current power obtained by converting a voltage of the input direct-current power into a first voltage; a second switching regulator coupled to the power input terminal and configured to supply, to a second electronic component, second direct-current power obtained by converting the voltage of the input direct-current power into a second voltage; and a signal generating circuit configured to generate, based on a first oscillation voltage of the first switching regulator, a reference signal to be a reference of a timing of switching the second switching regulator such that the first oscillation voltage and a second oscillation voltage of the second switching regulator become opposite in phase.

Resonant power converters and inverters comprising a self-oscillating feedback loop coupled from a switch output to a control input of a switching network comprising one or more semiconductor switches (S1, S2). The self-oscillating feedback loop sets a switching frequency of the power converter (100) and comprises a first intrinsic switch capacitance (CGD) coupled between a switch output and a control input of the switching network and a first inductor (LG). The first inductor (LG) is coupled in-between a first bias voltage source and the control input of the switching network and has a substantially fixed inductance. The first bias voltage source is configured to generate an adjustable bias voltage (VBias) applied to the first inductor (LG). The output voltage (V0UT) of the power converter (100) is controlled in a flexible and rapid manner by controlling the adjustable bias voltage (VBias).

A radiation hardened active OR circuit for providing a controlled electrical response in radiation-intensive applications. The circuit can include a first voltage source; a second voltage source; a comparator for sampling the first voltage source and the second voltage source; a first switch; and a second switch. The comparator can select a higher magnitude of the first voltage source and the second voltage source and connects the higher magnitude of the first voltage source and the second voltage source to a common output by steering a drive signal to one of the first switch or the second switch.

A power control circuit includes: a differential voltage monitor configured to monitor a differential voltage between a first voltage and a second voltage, and control a switching element to be turned on and off, wherein the differential voltage monitor controls the switching element in such a manner that in a case where the differential voltage is increased, when the differential voltage is lower than a first reference voltage, the switching element is turned off, and when the differential voltage is equal to or higher than the first reference voltage, the switching element is turned on, and in a case where the differential voltage is decreased, when the differential voltage is higher than a second reference voltage, the switching element is turned on, and when the differential voltage is equal to or lower than the second reference voltage, the switching element is turned off.