Abstract: A power supply device includes a power supply circuit configured to output different voltages to a plurality of output lines, a plurality of capacitors provided in correspondence with the plurality of output lines, one end of each of the plurality of capacitors being coupled to a corresponding output line of the plurality of output lines and an other end thereof being coupled to a ground potential, a plurality of diodes provided in correspondence with the plurality of output lines, anodes of the plurality of diodes being coupled to the corresponding output lines and cathodes thereof being commonly coupled, and a discharge resistor coupled to the cathodes of the plurality of diodes.

Abstract: A power supply device includes a power supply circuit configured to output different voltages to a plurality of output lines, a plurality of capacitors provided in correspondence with the plurality of output lines, one end of each of the plurality of capacitors being coupled to a corresponding output line of the plurality of output lines and an other end thereof being coupled to a ground potential, a plurality of diodes provided in correspondence with the plurality of output lines, anodes of the plurality of diodes being coupled to the corresponding output lines and cathodes thereof being commonly coupled, and a discharge resistor coupled to the cathodes of the plurality of diodes.

Abstract: A power supply device includes a power supply circuit configured to generate a direct current output voltage to be applied to both ends of a plurality of loads serially coupled, a detection circuit configured to detect an anomaly of a load voltage applied to each of the plurality of loads, and an adjustment circuit configured to decrease the output voltage in accordance with a number of abnormal loads where the anomaly is detected among the plurality of loads.

Abstract: A power supply device includes a power supply circuit configured to generate a direct current output voltage to be applied to both ends of a plurality of loads serially coupled, a detection circuit configured to detect an anomaly of a load voltage applied to each of the plurality of loads, and an adjustment circuit configured to decrease the output voltage in accordance with a number of abnormal loads where the anomaly is detected among the plurality of loads.

Abstract: A converter mounting board includes: an electronic component which is supplied an electric current; a high-frequency DC-DC converter that supplies a direct current corresponding to a fast change of the electric current of the electronic component; and a low-frequency DC-DC converter located far away from the electronic component than the high-frequency DC-DC converter and supplies a direct current corresponding to a slow change of the electric current of the electronic component.

Abstract: A power supply unit includes a conversion circuit that performs power conversion of power input into the power supply unit to supply direct-current power to an output path of the power supply unit, a control circuit that controls the conversion circuit so that output voltage supplied from the conversion circuit to the output path has a fixed value if output current supplied from the conversion circuit to the output path is lower than or equal to an overcurrent trip point and controls the conversion circuit so that the output voltage is decreased if the output current exceeds the overcurrent trip point, a monitoring circuit that monitors a discharge output from a discharge circuit to the output path, and a trip point changing circuit that increases the overcurrent trip point if the discharge output monitored by the monitoring circuit is decreased to a threshold value.

Abstract: A power supply unit includes a conversion circuit that performs power conversion of power input into the power supply unit to supply direct-current power to an output path of the power supply unit, a control circuit that controls the conversion circuit so that output voltage supplied from the conversion circuit to the output path has a fixed value if output current supplied from the conversion circuit to the output path is lower than or equal to an overcurrent trip point and controls the conversion circuit so that the output voltage is decreased if the output current exceeds the overcurrent trip point, a monitoring circuit that monitors a discharge output from a discharge circuit to the output path, and a trip point changing circuit that increases the overcurrent trip point if the discharge output monitored by the monitoring circuit is decreased to a threshold value.

Abstract: A converter mounting board includes: an electronic component which is supplied an electric current; a high-frequency DC-DC converter that supplies a direct current corresponding to a fast change of the electric current of the electronic component; and a low-frequency DC-DC converter located far away from the electronic component than the high-frequency DC-DC converter and supplies a direct current corresponding to a slow change of the electric current of the electronic component.

Abstract: Each of the power supply units in a power supply apparatus includes a voltage conversion circuit that converts input voltage into output voltage within a predetermined voltage range an output capacitor that outputs supply power while accumulating charges according to the voltage converted by the voltage conversion circuit, and an overload detection circuit that detects an overload of the output capacitor and when the overload is detected, notifies an apparatus operated using the power supplied from the power supply apparatus of an overload signal requesting a suppression of power consumption.

Abstract: A wiring board structure includes: a first wiring board includes a first interconnection and a second interconnection constituting a power supply route; a second wiring board mounted over the first wiring board and includes a third interconnection electrically coupled to the first interconnection; a semiconductor chip mounted over the second wiring board and electrically coupled to the third interconnection; a lid mounted over the second wiring board and electrically coupled to the semiconductor chip; and a coupler electrically couples the lid and the second interconnection to each other.

Abstract: When a result of detection by a current sensor 22 represents the occurrence of an overcurrent, comparators 23 of PSUs 2 transmit a present report indicating that fact to an SP 1. Receiving the present report, an FPGA 12 of the SP 1 turns on a forcible low-power signal. A forcible power saving control circuit 32 of a CPU 3 directly inputs a forcible-low-power-mode signal, turns on the signal, and controls an instruction issuance control unit that is configured to issue an instruction in the CPU 3, so as to immediately decrease the frequency at which the instruction issuance control unit issues instructions. This control is cancelled after the DVFS control circuit 35 has reduced the voltage of power output from a DDC 4 and a clock frequency output from a PLL circuit.

Abstract: Each of the power supply units in a power supply apparatus includes a voltage conversion circuit that converts input voltage into output voltage within a predetermined voltage range an output capacitor that outputs supply power while accumulating charges according to the voltage converted by the voltage conversion circuit, and an overload detection circuit that detects an overload of the output capacitor and when the overload is detected, notifies an apparatus operated using the power supplied from the power supply apparatus of an overload signal requesting a suppression of power consumption.

Abstract: A main power supply and a backup power supply have the same set voltage. To prevent electrical power from being supplied from the backup power supply to a load circuit, during a normal operation, a power supply control unit gives a standby instruction to the backup power supply so that the backup power supply is on standby at a voltage lower than that of the main power supply. When an AC power supply is stopped, the backup power supply is operated at the set voltage and the main power supply is stopped.

Abstract: A main power supply and a backup power supply have the same set voltage. To prevent electrical power from being supplied from the backup power supply to a load circuit, during a normal operation, a power supply control unit gives a standby instruction to the backup power supply so that the backup power supply is on standby at a voltage lower than that of the main power supply. When an AC power supply is stopped, the backup power supply is operated at the set voltage and the main power supply is stopped.

Abstract: A power supply device with n power supply units comprises main power supplies generating DC voltage supplies VDC1 to VDCn supplied to a load, respectively, unit side control sections each informing a main control section of the result of abnormality monitoring of each section, and control power supplies supplying DC voltage supplies VB1 to VBn to the unit side control sections, respectively. For example, the unit side control section is parallel connected to the control power supply units of other power supply units in addition to the control power supply.

Abstract: A cooling control apparatus controls a plurality of cooling members. The apparatus has a monitor which monitors states of predetermined combinations of the cooling members and a controller which controls the cooling members based on the states monitored by the monitor.

Abstract: A power supply apparatus with a back-up power unit includes: a plurality of AC-DC conversion units each connected in parallel to a commercial AC power source, and each converting an AC voltage of said power source to a high DC voltage; a plurality of DC-DC conversion units each connected to an output of each AC-DC conversion unit, each converting the high DC voltage to a low DC voltage to be supplied to a load, and each output thereof connected in parallel to said load; and a back-up power unit connected in parallel to the output of each AC-DC conversion unit through a first and second diodes in order to supply the high DC voltage to the DC-DC conversion unit when a failure occurs in the AC power source.

Abstract: A DC-DC converter apparatus includes a main converter section, a main control section, a supplemental power supply section, a signal processing section and a supplemental control section. The main converter section converts a D.C. input into an adequate D.C. output and supplies the converted D.C. output to a load. The supplemental power supply section supplies operating electric power to the main converter section and main control section of the DC-DC converter apparatus. The supplemental control section controls the operative or non-operative state of the supplemental power supply section based on a signal from the signal processing section. The main control section controls the operative or non-operative state of the main converter section in response to the operation of the supplemental power supply section.

Abstract: A power supply device includes an emergency power cut-off switch, a basic power supply unit supplied with an external alternating current electric power through the emergency power cut-off switch and a plurality of expansion power supply units supplied respectively with external alternating current electric power through power supply switches and provided sequentially and externally to the basic power supply unit. Diodes or current control elements are inserted in a path connecting a first line supplied with direct current outputs from the power supply units in the preceding stages of the externally provided expansion power supply units to a second line for supplying direct current outputs to the power supply units in the next stages of the externally provided expansion power supply units.