Abstract: A control circuit for controlling an output transistor for outputting power includes: a ramp terminal connected to a ramp resistance; a ramp waveform generation unit for generating a ramp waveform including a slope corresponding to a resistance value of the ramp resistance; an output control unit for controlling at least one of an ON time or an OFF time of the output transistor based on a comparison result between the ramp waveform and a comparison voltage; and a state detection unit for detecting a state of the ramp resistance connected to the ramp terminal, wherein the output control unit turns the output transistor to an OFF state regardless of the comparison result, when the state of the ramp resistance becomes a predetermined state.

Abstract: A switching control circuit for a power supply circuit that includes an inductor to which a voltage in accordance with an alternating current (AC) voltage is applied, and a transistor controlling an inductor current flowing through the inductor, the power supply circuit generating an output voltage from the AC voltage, the switching control circuit being configured to control switching of the transistor, the switching control circuit comprising: an ON signal output circuit that outputs an ON signal to turn on the transistor in response to the inductor current reaches a predetermined current, when a feedback voltage in accordance with the output voltage indicates that the output voltage is lower than a first level, and outputs the ON signal every first cycle when the feedback voltage indicates that the output voltage is higher than the first level; an OFF signal output circuit that outputs an OFF signal to turn off the transistor based on the feedback voltage; and a driver circuit that drives the transistor ba

Abstract: An integrated circuit for controlling switching of a transistor in a power supply circuit. The integrated circuit includes: a first detection circuit configured to detect whether an inductor current has reached a first predetermined value; a signal output circuit configured to operate in a first mode or a second mode; a control circuit configured to control the signal output circuit to operate in the first mode when an amplitude of the first voltage after the inductor current has reached the first predetermined value is smaller than a second predetermined value, and to operate in the first mode or the second mode, corresponding to a condition of a load of the power supply circuit, when the amplitude is larger than the second predetermined value; and a driver circuit configured to turn on and off the transistor based respectively on the signal and a feedback voltage corresponding to the output voltage.

Abstract: A power supply control device includes a switch control unit configured to control ON/OFF of a switching device of a boost chopper by using an oscillation wave, a comparison voltage generating unit configured to charge or discharge comparison capacitor that generates a comparison voltage for comparison with the oscillation wave in correspondence with a DC output voltage outputted from the boost chopper, an input increase detecting unit configured to detect whether a detection value corresponding to current flowing through the boost chopper has increased to or above a detection criterion, an output voltage detecting unit configured to detect whether the DC output voltage is at or above the lower limit voltage, a discharging unit configured to discharge the comparison capacitor when the detection value has increased to or above the detection criterion and the DC output voltage is at or above the lower limit voltage.

Abstract: A power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a rectifier circuit that rectifies the AC voltage, an inductor receives a rectified voltage from the rectifier circuit, a transistor that controls an inductor current flowing through the inductor, and an integrated circuit that performs switching of the transistor. The integrated circuit includes an error output circuit that outputs an error between a feedback voltage and a reference voltage, a target value generating circuit that generates a target value of the inductor current based on the error, an adjustment circuit that adjusts the target value, first and second comparison circuits that compare the inductor current with a predetermined value and with the target value, respectively, and a drive circuit that turns on the transistor when the inductor current reaches the predetermined value, and turns off the transistor when the inductor current reaches the target value.

Abstract: A control circuit for controlling an output transistor for outputting power includes: a ramp terminal connected to a ramp resistance; a ramp waveform generation unit for generating a ramp waveform including a slope corresponding to a resistance value of the ramp resistance; an output control unit for controlling at least one of an ON time or an OFF time of the output transistor based on a comparison result between the ramp waveform and a comparison voltage; and a state detection unit for detecting a state of the ramp resistance connected to the ramp terminal, wherein the output control unit turns the output transistor to an OFF state regardless of the comparison result, when the state of the ramp resistance becomes a predetermined state.

Abstract: A power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a rectifier circuit that rectifies the AC voltage, an inductor receives a rectified voltage from the rectifier circuit, a transistor that controls an inductor current flowing through the inductor, and an integrated circuit that performs switching of the transistor. The integrated circuit includes an error output circuit that outputs an error between a feedback voltage and a reference voltage, a target value generating circuit that generates a target value of the inductor current based on the error, an adjustment circuit that adjusts the target value, first and second comparison circuits that compare the inductor current with a predetermined value and with the target value, respectively, and a drive circuit that turns on the transistor when the inductor current reaches the predetermined value, and turns off the transistor when the inductor current reaches the target value.

Abstract: A power supply control device includes a switch control unit configured to control ON/OFF of a switching device of a boost chopper by using an oscillation wave, a comparison voltage generating unit configured to charge or discharge comparison capacitor that generates a comparison voltage for comparison with the oscillation wave in correspondence with a DC output voltage outputted from the boost chopper, an input increase detecting unit configured to detect whether a detection value corresponding to current flowing through the boost chopper has increased to or above a detection criterion, an output voltage detecting unit configured to detect whether the DC output voltage is at or above the lower limit voltage, a discharging unit configured to discharge the comparison capacitor when the detection value has increased to or above the detection criterion and the DC output voltage is at or above the lower limit voltage.

Abstract: A control circuit for a switching power includes a driver unit that receives an error signal outputted from an error amplifier and generates driving pulses to be applied to a power semiconductor switching device on the basis of the error signal; a short-circuit detection circuit that determines whether a short-circuit occurs between a feedback terminal and a comp terminal of the control circuit; a holding circuit that holds the error signal; and a switching circuit, wherein when the short-circuit detection circuit determines that the short-circuit occurs, the switching circuit provides an error signal held by the holding circuit prior to the detection of the short-circuit to the driver unit instead of the error signal outputted from the error amplifier so that the driver unit does not generate the driving pluses based on the error signal outputted from the error amplifier when the short-circuit is determined to have occurred.

Abstract: A control circuit for a switching power includes a driver unit that receives an error signal outputted from an error amplifier and generates driving pulses to be applied to a power semiconductor switching device on the basis of the error signal; a short-circuit detection circuit that determines whether a short-circuit occurs between a feedback terminal and a comp terminal of the control circuit; a holding circuit that holds the error signal; and a switching circuit, wherein when the short-circuit detection circuit determines that the short-circuit occurs, the switching circuit provides an error signal held by the holding circuit prior to the detection of the short-circuit to the driver unit instead of the error signal outputted from the error amplifier so that the driver unit does not generate the driving pluses based on the error signal outputted from the error amplifier when the short-circuit is determined to have occurred.

Abstract: A switching power supply includes: a switching device connected between a power supply input terminal and a ground terminal via an inductance element; an output circuit that generates a prescribed output voltage by rectifying and smoothing current obtained from the inductance element as the switching device is switched ON and OFF; an output voltage control circuit that controls an ON time of the switching device on the basis of a feedback voltage obtained through the output voltage of the output circuit; and a short-circuit detection circuit that outputs a short-circuit detection signal by detecting short-circuits in the switching device on the basis of a voltage applied to a control terminal of the switching device when the switching device is ON, the short-circuit detection signal being used to control operation of the output voltage control circuit so as to gradually reduce the ON time of the switching device.

Abstract: A switching power supply includes: a switching device connected between a power supply input terminal and a ground terminal via an inductance element; an output circuit that generates a prescribed output voltage by rectifying and smoothing current obtained from the inductance element as the switching device is switched ON and OFF; an output voltage control circuit that controls an ON time of the switching device on the basis of a feedback voltage obtained through the output voltage of the output circuit; and a short-circuit detection circuit that outputs a short-circuit detection signal by detecting short-circuits in the switching device on the basis of a voltage applied to a control terminal of the switching device when the switching device is ON, the short-circuit detection signal being used to control operation of the output voltage control circuit so as to gradually reduce the ON time of the switching device.

Abstract: A car side panel assembly line capable of increasing a productivity by shortening an operation time and having a set station ST2, a welding station ST3, and a next operation station ST4 disposed in series in this order, comprising a set carriage 91 having, thereon, a set jig 91 capable of holding the side panel W in upright attitude from the side and installed reciprocatingly between the set station ST2 and the welding station ST3 and a frame carriage 81 having a lower frame 80 and an upper frame 81, capable of holding, between both frames 80, 81, the side panel W in upright attitude through clamp members (821, 822, 823, 831, 832, 833) mounted on the frames 80, 81, installed reciprocatingly between the welding station ST3 and the next operation station ST4, and allowing to exchange the side panel W with the set carriage 91.

Abstract: A semiconductor integrated circuit includes a first power supply line which supplies an external power supply voltage provided from an exterior of the circuit, a second power supply line which supply an internal power supply voltage to an interior circuit, a plurality of NMOS transistors which are situated at different locations, and have drain nodes thereof coupled to the first power supply line and source nodes thereof coupled to the second power supply line, and a regulator circuit which supplies a reference voltage to gate nodes of the plurality of NMOS transistors.

Abstract: A semiconductor integrated circuit includes a first power supply line which supplies an external power supply voltage provided from an exterior of the circuit, a second power supply line which supply an internal power supply voltage to an interior circuit, a plurality of NMOS transistors which are situated at different locations, and have drain nodes thereof coupled to the first power supply line and source nodes thereof coupled to the second power supply line, and a regulator circuit which supplies a reference voltage to gate nodes of the plurality of NMOS transistors.

Abstract: A car side panel assembly line capable of increasing a productivity by shortening an operation time and having a set station ST2, a welding station ST3, and a next operation station ST4 disposed in series in this order, comprising a set carriage 91 having, thereon, a set jig 91 capable of holding the side panel W in upright attitude from the side and installed reciprocatingly between the set station ST2 and the welding station ST3 and a frame carriage 81 having a lower frame 80 and an upper frame 81, capable of holding, between both frames 80, 81, the side panel W in upright attitude through clamp members (821, 822, 823, 831, 832, 833) mounted on the frames 80, 81, installed reciprocatingly between the welding station ST3 and the next operation station ST4, and allowing to exchange the side panel W with the set carriage 91.

Abstract: A clock modulation circuit modulates the frequency of a clock signal to generate a modulated clock signal. A wait requesting signal receives frequency information indicating the frequency of the modulated clock signal and, when the frequency information indicates a frequency higher than a reference frequency, generates a wait requesting signal to an external bus interface. Since an optimum wait cycle is inserted to the external bus interface according to a change of the frequency of the modulated clock signal, needless wait cycle can be prevented from being inserted to the external bus interface. As a result of this, it is possible to disperse the peak of radiated noise which is caused by the clock signal and to reduce electromagnetic interference, without decreasing performance of a system. Namely, it can serve both market needs for reducing noise and speeding up.

Abstract: A clock modulation circuit modulates the frequency of a clock signal to generate a modulated clock signal. A wait requesting signal receives frequency information indicating the frequency of the modulated clock signal and, when the frequency information indicates a frequency higher than a reference frequency, generates a wait requesting signal to an external bus interface. Since an optimum wait cycle is inserted to the external bus interface according to a change of the frequency of the modulated clock signal, needless wait cycle can be prevented from being inserted to the external bus interface. As a result of this, it is possible to disperse the peak of radiated noise which is caused by the clock signal and to reduce electromagnetic interference, without decreasing performance of a system. Namely, it can serve both market needs for reducing noise and speeding up.

Abstract: A three-wheeled automobile comprises a front cowl for enclosing a front portion of the automobile, and a floor forming a passenger step. The front cowl has on lateral sides thereof rear ends positioned above front wheels of the automobile, and a front end surface positioned forwardly of the front wheels. As a result, a large space is provided between a front wall of the front cowl and a seat. A handle post is provided generally centrally of the floor. The floor has roomy foot platforms located around the handle post. As a result, a space left forwardly of the handle post can be used as a feet accommodating area.

Abstract: An arm main body of a welding gun is formed of an aluminum alloy. An anodic oxide coating is formed on an entire surface of the arm main body. The arm main body is then machined to remove the anodic oxide coating formed on a power feeing terminal portion and an electrode tip connecting portion which are provided in the arm main body. The anodic oxide coating may be subjected to a sealing treatment with a dispersion liquid in which a magnetic material is mixed in dispersion. Alternatively, the arm main body formed of an aluminum alloy may be subjected to an anodic oxide coating treatment with a treatment liquid in which a magnetic material is mixed in dispersion.