Abstract: A voltage regulating device connected to a series circuit of electrolytic capacitors provided between a ground wiring and an input voltage wiring, includes: a high-side terminal connected to the input voltage wiring; a low-side terminal connected to the ground wiring; a middle terminal connected to a connection node between the electrolytic capacitors; and a voltage limiting circuit configured to limit a voltage between the high-side terminal and the middle terminal to a high-side limit voltage or lower by controlling a high-side regulating current between the high-side terminal and the middle terminal according to the voltage between the high-side terminal and the middle terminal, and configured to limit a voltage between the middle terminal and the low-side terminal to a low-side limit voltage or lower by controlling a low-side regulating current between the middle terminal and the low-side terminal according to the voltage between the middle terminal and the low-side terminal.

Abstract: A switching device includes a switching transistor provided between a first terminal connected to an inductive load and a second terminal, and turns the switching transistor on and off. A driver turns the switching transistor on by supplying a charging current to a gate of the switching transistor, and turns the switching transistor off by discharging charges stored in the gate of the switching transistor. The driver discharges the stored charges via an external resistor provided outside the switching device and between a resistor connection terminal and a ground.

Abstract: A tool exchange device includes: a module attachment portion provided on a coupling unit body of at least one of the first coupling unit and the second coupling unit; and a module unit provided with a connector and detachably attached to the coupling unit body via the module attachment portion. The module attachment portion includes a first fitting portion having a projecting cross section or a recessed cross section. The module unit includes a second fitting portion having a recessed cross section or a projecting cross section, and is fixed to the coupling unit body by the first fitting portion or the second fitting portion having the recessed cross section sandwiching the second fitting portion or the first fitting portion having the projecting cross section in a thickness direction and making a plurality of pins penetrate the first fitting portion and the second fitting portion.

Abstract: A tool exchange device includes a first coupling member attached to one of a body side of an apparatus and a tool side and having a first coupling surface, and a second coupling member attached to the other of the body side and the tool side and having a second coupling surface capable of being in contact with the first coupling surface, in which the first coupling member includes, on the first coupling surface, a first pin, a second pin, and an auxiliary projection, the second coupling member includes, on the second coupling surface, a first hole, a second hole, and an auxiliary hole, a first gap is provided each between the first pin and the first hole and between the second pin and the second hole, a second gap is provided between the auxiliary projection and the auxiliary hole, and the second gap is larger than the first gap.

Abstract: The present disclosure provides a power supply control device and a flyback converter. The power supply control device includes: a comparator, comparing a current sensing signal generated by IN conversion of a primary side current flowing in the primary winding with a threshold voltage; a switching controller, turning off a switching element according to a comparing result of the current sensing signal and the threshold voltage by the comparator; an external terminal, connectable to a connection node of an external resistor connected in series between one end of the auxiliary winding and an application end of a ground potential; a current detector, detecting a terminal current flowing through the external terminal; and a threshold voltage corrector, correcting the threshold voltage based on a current detection signal of the current detector.

Abstract: A power control device (40) includes a feedback voltage generator (401), which generates as a differential current (I_DF) the difference between a first current (I_VDS) generated by a first resistor (59) having one terminal connectable to a current input terminal (DRAIN terminal) and a second current (I_VH) generated by a second resistor (58) having one terminal connectable to an application terminal for an input voltage (VIN) and which generates a feedback voltage (V1) based on the differential current generated.

Abstract: A tool exchange device includes a first coupling member attached to one of a body side of an apparatus and a tool side and having a first coupling surface, and a second coupling member attached to the other of the body side and the tool side and having a second coupling surface capable of being in contact with the first coupling surface, in which the first coupling member includes, on the first coupling surface, a first pin, a second pin, and an auxiliary projection, the second coupling member includes, on the second coupling surface, a first hole, a second hole, and an auxiliary hole, a first gap is provided each between the first pin and the first hole and between the second pin and the second hole, a second gap is provided between the auxiliary projection and the auxiliary hole, and the second gap is larger than the first gap.

Abstract: The present disclosure provides a power supply control device and a flyback converter. The power supply control device includes: a comparator, comparing a current sensing signal generated by IN conversion of a primary side current flowing in the primary winding with a threshold voltage; a switching controller, turning off a switching element according to a comparing result of the current sensing signal and the threshold voltage by the comparator; an external terminal, connectable to a connection node of an external resistor connected in series between one end of the auxiliary winding and an application end of a ground potential; a current detector, detecting a terminal current flowing through the external terminal; and a threshold voltage corrector, correcting the threshold voltage based on a current detection signal of the current detector.

Abstract: A synchronous rectification controller that controls driving a synchronous rectification transistor arranged on secondary side, includes: a gate terminal being electrically connectable to a gate of the synchronous rectification transistor; a drain terminal being electrically connectable to a drain of the synchronous rectification transistor via a first resistor; a first comparator comparing a drain terminal voltage generated at the drain terminal with negative first threshold voltage; a second comparator comparing the drain terminal voltage with negative second threshold voltage higher than the first threshold voltage; and a driver performing on/off control of the synchronous rectification transistor based on result of the comparison by the first comparator and result of the comparison by the second comparator, wherein when the synchronous rectification transistor is turned on, voltage is added to the drain terminal voltage by current flowing through the first resistor according to a second resistor.

Abstract: According to an embodiment, a bed apparatus includes a frame, a side rail, and a holder. The holder is secured to the frame. The holder holds the side rail to make the side rail switchable between a first position state where the side rail is in a first position and a second position state where the side rail is in a second position lower than the first position. The holder includes: a lock portion to lock the side rail in the first position state; a cover portion to cover at least part of the lock portion; a lever portion to be operated to release lock of the lock portion; and a stopper portion to make it difficult for the lever portion to operate to release the lock. The bed apparatus that can prevent erroneous release of the lock can be provided.

Abstract: A power control device for controlling driving of an LLC resonant converter including a first switching element to one end of which an input voltage is applied, a second switching element of which one end is connected to the other end of the first switching element, and a primary winding and a resonant capacitor connected in series between a first connection node at which the first and second switching elements are connected together and the other end of the second switching element includes an on-timing controller that detects variation of a switching voltage detection signal based on a switching voltage appearing at the first connection node rising up to the input voltage and falling down to 0 V and that, based on the result of the detection, generates a high-side on-signal for turning on the first switching element and a low-side on-signal for turning on the second switching element.

Abstract: A synchronous rectification controller that controls driving a synchronous rectification transistor arranged on secondary side, includes: a gate terminal being electrically connectable to a gate of the synchronous rectification transistor; a drain terminal being electrically connectable to a drain of the synchronous rectification transistor via a first resistor; a first comparator comparing a drain terminal voltage generated at the drain terminal with negative first threshold voltage; a second comparator comparing the drain terminal voltage with negative second threshold voltage higher than the first threshold voltage; and a driver performing on/off control of the synchronous rectification transistor based on result of the comparison by the first comparator and result of the comparison by the second comparator, wherein when the synchronous rectification transistor is turned on, voltage is added to the drain terminal voltage by current flowing through the first resistor according to a second resistor.

Abstract: An isolated synchronous rectifying DC/DC converter includes a drain terminal connected to a drain of a synchronous rectification transistor, a source terminal connected to a source of the synchronous rectification transistor; a comparator configured to compare a drain voltage of the drain terminal with a predetermined threshold voltage which set is based on a potential of the source terminal, a first flip-flop to which an OFF signal output from the comparator is input, a driver configured to output a gate signal to the synchronous rectification transistor based on an output signal of the first flip-flop, and a first abnormality detection circuit including an abnormality detection comparator configured to compare a voltage of the source terminal with a detection threshold voltage, and configured to output a first abnormality detection signal based on an output of the abnormality detection comparator.

Abstract: A power control device for controlling driving of an LLC resonant converter including a first switching element to one end of which an input voltage is applied, a second switching element of which one end is connected to the other end of the first switching element, and a primary winding and a resonant capacitor connected in series between a first connection node at which the first and second switching elements are connected together and the other end of the second switching element includes an on-timing controller that detects variation of a switching voltage detection signal based on a switching voltage appearing at the first connection node rising up to the input voltage and falling down to 0 V and that, based on the result of the detection, generates a high-side on-signal for turning on the first switching element and a low-side on-signal for turning on the second switching element.

Abstract: A synchronous rectification controller includes: a drain terminal connected to a drain of a synchronous rectification transistor; a first comparator configured to compare a drain voltage of the drain terminal with a first threshold voltage; a second comparator configured to compare the drain voltage of the drain terminal with a second threshold voltage; a flip-flop to which an ON signal output from the first comparator and an OFF signal output from the second comparator are input; a driver configured to output a gate signal to the synchronous rectification transistor based on an output signal of the flip-flop; and a threshold adjusting part configured to adjust the second threshold voltage based on the drain voltage.

Abstract: An isolated synchronous rectification type DC/DC converter, includes: a transformer including primary and secondary windings; a switching transistor connected to the primary winding; a synchronous rectifying transistor installed between the secondary winding and a ground line on the secondary side; a photocoupler including a light emitting device and a light receiving device; a feedback circuit driving the light emitting device such that an output voltage of the DC/DC converter approaches a target voltage; a primary side controller connected to the light receiving device and switching the switching transistor depending on feedback signal from the photocoupler; a synchronous rectification controller controlling the rectifying transistor; and a protection circuit including a temperature detection element, one end of the detection element connected to a drain of the rectifying transistor, the protection circuit configured to detect an overheated state of the rectifying transistor depending on a first signal gene

Abstract: A secondary controller drives a light emitting element of a photocoupler such that a detection voltage VOUTS corresponding to an output voltage VOUT generated in an output capacitor C approximates to a reference voltage VREF. A primary controller controls a switching transistor M according to a feedback signal VFB. A protection circuit is activated and drives the light emitting element of the photocoupler when detecting an abnormal state. An auxiliary power supply circuit includes a power supply capacitor C provided separately from the output capacitor C and supplies a power supply voltage VCC to the protection circuit and an anode of the light emitting element of the photocoupler.

Abstract: A secondary-side module comprises: a synchronous rectification controller that controls a synchronous rectification transistor; and a shunt regulator that generates a current that corresponds to the difference between an output voltage VOUT of a DC/DC converter and the target value of the output voltage, which are housed in a single package. The multiple pins to be connected to the shunt regulator are all laid out along a first side of the package.

Abstract: A rectifier IC seals, in a single package, a first transistor chip which integrates a first transistor, a second transistor chip which integrates a second transistor and a controller chip which detects a first node voltage and a second node voltage of each of the transistors so as to perform on/off control on the transistors, and the rectifier IC functions as a secondary-side rectification means of an isolated switching power supply.

Abstract: There is provided an isolated synchronous rectifying DC/DC converter that includes a drain terminal connected to a drain of a synchronous rectification transistor, a source terminal connected to a source of the synchronous rectification transistor; a comparator configured to compare a drain voltage of the drain terminal with a predetermined threshold voltage which set is based on a potential of the source terminal, a first flip-flop to which an OFF signal output from the comparator is input, a driver configured to output a gate signal to the synchronous rectification transistor based on an output signal of the first flip-flop, and a first abnormality detection circuit including an abnormality detection comparator configured to compare a voltage of the source terminal with a detection threshold voltage, and configured to output a first abnormality detection signal based on an output of the abnormality detection comparator.