Abstract: Disclosed herein is a controller circuit of a series capacitor buck converter including input and output lines, a first switch, a coupled inductor including a first inductor and a second inductor, a second switch, a series capacitor, a third switch, a fourth switch, and an output capacitor. The controller circuit includes a control logic circuit that generates a plurality of control signals instructing ON-OFF states of the first to fourth switches so as to alternately repeat a first state in which the first switch and the fourth switch are ON and a second state in which the second switch and the third switch are ON, with an interval of dead time, and a first timing generator that generates a first timing signal as a trigger for turning on the first switch at a second dead time inserted into a period of transition from the second state to the first state.

Abstract: Provided is a controller circuit for a series capacitor step-down converter that drives the series capacitor step-down converter at a switching frequency fsw higher than a frequency f0 represented by Equation (1) [ Math . 1 ] ? f 0 = 1 2 ? ? ? L C r ( L 2 - M 2 ) ( 1 ) when a design value of inductance of two inductors constituting a coupled inductor of the series capacitor step-down converter is L, a design value of mutual inductance of the two inductors is M, and a design value of capacitance of a series capacitor is Cr.

Abstract: Provided is a controller circuit of a series capacitor step-down converter, the series capacitor step-down converter including an input line and an output line, a first switch, a coupled inductor, a second switch, a series capacitor, a third switch, a fourth switch, and an output capacitor, the controller circuit being configured to alternately switch between a first state in which the first switch and the fourth switch are on and a second state in which the second switch and the third switch are on while interposing a dead time between the first state and the second state, and turn on the second switch ahead of the third switch before a direction of a current of the first inductor is reversed in the dead time during a transition from the first state to the second state.

Abstract: Disclosed herein is a controller circuit for a series capacitor step-down converter. The circuit includes an oscillator that generates a clock signal, a control logic circuit that generates a plurality of control signals for controlling a plurality of switching elements of the series capacitor step-down converter in synchronization with the clock signal, a plurality of drivers that drive the plurality of switching elements according to the plurality of control signals, and a frequency controller that controls a frequency of the clock signal on the basis of an output voltage of the series capacitor step-down converter.

Abstract: A switching power supply device includes first to fourth switches sequentially connected in series, an inductor, a first capacitor whose first end is connected to a connection node of the first switch and the second switch and whose second end is connected to a connection node of the third switch, the fourth switch, and the inductor, a second capacitor whose first end is connected to a connection node of the second switch and the third switch, and a controller that controls switching on and off of the first to fourth switches. In at least one of a first pair configured with the first switch and the third switch and a second pair configured with the second switch and the fourth switch, the controller shifts a timing of switching from off to on between two switches.

Abstract: A light-emitting device includes a structure having a first surface and a second surface opposite each other, a light-emitting portion arranged on the first surface, and a protective layer covering the light-emitting portion and the first surface. The structure further includes an electrically conductive member to which one of a signal and a potential for operating the light-emitting portion is given, and an aperture extending from the electrically conductive member to a virtual plane which includes the second surface.

Abstract: Photoelectric conversion apparatus includes semiconductor layer in which first photoelectric converters are arranged in light-receiving region and second photoelectric converters are arranged in light-shielded region, light-shielding wall arranged above the semiconductor layer and defining apertures respectively corresponding to the first photoelectric converters, and light-shielding film arranged above the semiconductor layer. The light-shielding film includes first portion extending along principal surface of the semiconductor layer to cover the second photoelectric converters. The first portion has lower surface and upper surface. The light-shielding wall includes second portion whose distance from the semiconductor layer is larger than distance between the upper surface and the principal surface. Thickness of the first portion in direction perpendicular to the principal surface is larger than thickness of the second portion in direction parallel to the principal surface.

Abstract: The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.

Abstract: A controller IC for a resonant switched capacitor converter includes a drive circuit and a frequency controller. The frequency controller controls a switching frequency based on an output voltage of the resonant switched capacitor converter.

Abstract: Provided is a control circuit of a step-down converter, the control circuit including a bottom detecting circuit that asserts a turn-on signal when an output voltage of the step-down converter falls below a bottom level, an on-time generating circuit that includes a second timer circuit capable of measuring an on-time TON in such a manner that the assertion of the turn-on signal is a trigger for the measurement, and is configured to obtain a relation of TON=?·VOUT/VIN when an input voltage of the step-down converter is defined as VIN, the output voltage is defined as VOUT, and a controllable coefficient is defined as ?, a control logic that sets a high-side transistor to an on-state during the on-time TON from the assertion of the turn-on signal and subsequently sets a low-side transistor to an on-state until the turn-on signal is asserted next, and an on-time correcting circuit that decreases the coefficient ? when a switching period of the control logic is longer than a reference period, and increases the c

Abstract: An inductor is connected between a switching node and an output line. The first switch and the second switch are connected in series between an input line and a ground line. A third switch is connected between the switching node and the input line. A flying capacitor is connected across the third switch and the first switch. A controller IC drives the first switch to the third switch.

Abstract: Provided is a regulator circuit that supplies an output voltage to a load, the regulator circuit including an error amplifier that amplifies an error between a feedback signal and a reference voltage, and an output stage that changes the output voltage, the error amplifier including a first transconductance amplifier that receives the feedback signal and the reference voltage, a first resistance connected to an output node of the first transconductance amplifier and a ground, a first capacitor connected in parallel to the first resistance, a second transconductance amplifier that receives a voltage of the output node of the first transconductance amplifier and the feedback signal, a second resistance connected to an output node of the second transconductance amplifier and a ground, a second capacitor connected in parallel to the second resistance, and a zero controller that controls a gain of the second transconductance amplifier.

Abstract: A first comparator is enabled during a period in which a wake-up signal is asserted and asserts a first detection signal indicative of a comparison result between a first feedback voltage generated by a first voltage dividing circuit and a first threshold voltage. A second comparator is always enabled and asserts a second detection signal indicative of a comparison result between a second feedback voltage VFB generated by a second voltage dividing circuit and a second threshold voltage VTH. A logic circuit generates a first pulse signal based on a first detection signal or a second detection signal, asserts the wake-up signal in a non-light load state, and negates the wake-up signal in a light load state.

Abstract: A main comparator compares a feedback voltage VFB corresponding to an output voltage VOUT of a DC/DC converter with a reference voltage VREF and asserts a turn-on signal when the feedback voltage VFB falls below the reference voltage VREF. A timer circuit generates a turn-off signal S2 that transitions in level after an ON time TON proportional to (VOUT?VIN/VOUT has elapsed from assertion of the turn-on signal.

Abstract: A semiconductor apparatus configured to decrease occurrence of exfoliation between a conductor layer and an insulator layer is provided. A first region containing silicon and copper is disposed between a first conductor portion and a first insulator portion. A second region containing silicon and copper is disposed between a second conductor portion and a second insulator portion. The first region has a maximum nitrogen concentration higher than that of the second region.

Abstract: A vehicle front body structure includes a front side frame extending forward from a dashboard separating a cabin and an engine compartment, an apron reinforcement extending in a front-rear direction, a suspension housing, a braking force booster between this suspension housing and the dashboard, and a coupling member coupled to the front side frame and the apron reinforcement. The coupling member is formed of a material with higher tensile strength than the suspension housing. The coupling member includes a body section fixed to a rear surface of the suspension housing, and a wall section. bent from a lower end of this body section and extending rearward.

Abstract: A switching power supply device includes first to fourth switches sequentially connected in series, an inductor, a first capacitor whose first end is connected to a connection node of the first switch and the second switch and whose second end is connected to a connection node of the third switch, the fourth switch, and the inductor, a second capacitor whose first end is connected to a connection node of the second switch and the third switch, and a controller that controls switching on and off of the first to fourth switches. In at least one of a first pair configured with the first switch and the third switch and a second pair configured with the second switch and the fourth switch, the controller shifts a timing of switching from off to on between two switches.

Abstract: A switching power supply device includes first to fourth switches sequentially connected in series, an inductor, a first capacitor whose first end is connected to a connection node of the first switch and the second switch and whose second end is connected to a connection node of the third switch, the fourth switch, and the inductor, a second capacitor whose first end is connected to a connection node of the second switch and the third switch, and a controller that controls switching on and off of the first to fourth switches. In at least one of a first pair configured with the first switch and the third switch and a second pair configured with the second switch and the fourth switch, the controller shifts a timing of switching from off to on between two switches.

Abstract: Photoelectric conversion apparatus includes semiconductor layer in which first photoelectric converters are arranged in light-receiving region and second photoelectric converters are arranged in light-shielded region, light-shielding wall arranged above the semiconductor layer and defining apertures respectively corresponding to the first photoelectric converters, and light-shielding film arranged above the semiconductor layer. The light-shielding film includes first portion extending along principal surface of the semiconductor layer to cover the second photoelectric converters. The first portion has lower surface and upper surface. The light-shielding wall includes second portion whose distance from the semiconductor layer is larger than distance between the upper surface and the principal surface. Thickness of the first portion in direction perpendicular to the principal surface is larger than thickness of the second portion in direction parallel to the principal surface.

Abstract: Photoelectric conversion apparatus includes semiconductor layer in which first photoelectric converters are arranged in light-receiving region and second photoelectric converters are arranged in light-shielded region, light-shielding wall arranged above the semiconductor layer and defining apertures respectively corresponding to the first photoelectric converters, and light-shielding film arranged above the semiconductor layer. The light-shielding film includes first portion extending along principal surface of the semiconductor layer to cover the second photoelectric converters. The first portion has lower surface and upper surface. The light-shielding wall includes second portion whose distance from the semiconductor layer is larger than distance between the upper surface and the principal surface. Thickness of the first portion in direction perpendicular to the principal surface is larger than thickness of the second portion in direction parallel to the principal surface.