Abstract: If an input voltage to an output control device is above a lower limit value, the output control device operates in a constant voltage control mode for maintaining an output voltage at a substantially constant voltage. If the input voltage of the output control device falls below the lower limit value, the output voltage is controlled to be lower than the constant voltage in the constant voltage control mode, and the output control device operates in a lower limit value sustaining mode for maintaining the input voltage at the lower limit value. Then, the output control device shifts to a current increasing mode in which the output current rises as the output voltage falls.

Abstract: If an input voltage to an output control device is above a lower limit value, the output control device operates in a constant voltage control mode for maintaining an output voltage at a substantially constant voltage. If the input voltage of the output control device falls below the lower limit value, the output voltage is controlled to be lower than the constant voltage in the constant voltage control mode, and the output control device operates in a lower limit value sustaining mode for maintaining the input voltage at the lower limit value. Then, the output control device shifts to a current increasing mode in which the output current rises as the output voltage falls.

Abstract: An FET 21 is connected in parallel to a series circuit of a switching device 13 and an inductor 12 between an input terminal 11a and an output terminal 11b, wherein an output voltage Vout is dropped only by an operation of the switching device 13; the FET 21 is turned on by a driving circuit 22 when the switching device 13 sustains an on duty factor of 100% so that a series resistance of the switching device 13 and the inductor 12 is connected in parallel to an on resistance of the FET 21, thereby increasing a supply current and extending a period during which an output voltage provided to the output terminal 11b is sustained at a predetermined level. Therefore, a power circuit capable of extending an operating time of a battery-operated power supply, a method for driving same, and further an electronic module implementing same can be obtained.

Abstract: The present invention provides a switching circuit and an electronic switching component having a switching semiconductor device to perform switching between a conducting state and a non-conducting state of a conducting path to thereby reduce the power loss thereof and a control method thereof. In the present invention, at least two FETs 11 and 12, wherein the FET 11 has a faster switching time and the FET 12 has a lower ON resistance. Active terminals (drains and sources) of the FETs 11 and 12 are connected to each other in parallel. By employing these FETs 11 and 12, the conversion between an ON-state and an OFF-state of the conducting path is performed. In converting from the non-conducting state to the conducting state, the control circuit 13 first turns on the FET 11 and then turns on the FET 12 when if a voltage between terminals of the FET 11 reaches around a saturation value thereof.

Abstract: An FET 21 is connected in parallel to a series circuit of a switching device 13 and an inductor 12 between an input terminal 11a and an output terminal 11b, wherein an output voltage Vout is dropped only by an operation of the switching device 13; the FET 21 is turned on by a driving circuit 22 when the switching device 13 sustains an on duty factor of 100% so that a series resistance of the switching device 13 and the inductor 12 is connected in parallel to an on resistance of the FET 21, thereby increasing a supply current and extending a period during which an output voltage provided to the output terminal 11b is sustained at a predetermined level. Therefore, a power circuit capable of extending an operating time of a battery-operated power supply, a method for driving same, and further an electronic module implementing same can be obtained.

Abstract: The present invention provides a multilayered electronic component (110) having improved thermolytic effect for an electronic circuit module (100), facilitating the realization of a miniaturization of the electronic circuit module (100). The multilayered electronic component (110) is provided with a first surface (111), a second opposite surface and side surfaces. A heat dissipation pattern (116) is formed in the multilayered electronic component (110) in a vicinity of the first surface (111) thereof on which a plurality of lands (114) is formed, in such a way that at least one land (114) is electrically connected to the heat dissipation pattern (116). A semiconductor chip (140) is mounted on the first surface (111) of the multilayered electronic component (110), thereby forming the electronic circuit module (100). Heat induced in the semiconductor chip (140) is emitted from the heat dissipation pattern (116), which will, in turn, make a thermolytic effect of the electronic circuit module (100) be improved.

Abstract: A hybrid integrated circuit device is provided which suppresses lowering of the inductance value of a mounted coil component. A hybrid integrated circuit device according to the present invention has such a structure that a wiring pattern is provided on at least one main face of a substrate, a laid core type coil component is mounted on at least one main surface of the substrate, and a conductor pattern including a ground pattern is provided at least either on a main face opposite to the surface of the substrate upon which the laid core type coil component is mounted or in an interior of the substrate. In particular, the hybrid integrated circuit device has a configuration such that a magnetic flux passing window, having an absence of ground pattern, is provided in an orthographic projection area corresponding to a winding portion of the coil component in the conductor pattern.