Abstract: A light emitting element drive device generates a single output current while switching a target current value for each of a plurality of light emitting elements, and supplies the single output current to the plurality of light emitting elements in a time division manner.

Abstract: A driving device includes, for example: an output terminal; a transistor configured to generate an output current to the output terminal; a logic circuit configured to perform on/off control of the transistor at a predetermined period; and a current sense circuit configured to sense the output current. The current sense circuit is configured to be enabled during an on-period of the transistor. The logic circuit is configured to suspend the on/off control and reset the period when the output current becomes lower than a first threshold value during the on-period.

Abstract: A driving device includes, for example: an output terminal; a transistor configured to generate an output current to the output terminal; a logic circuit configured to perform on/off control of the transistor at a predetermined period; and a current sense circuit configured to sense the output current. The current sense circuit is configured to be enabled during an on-period of the transistor. The logic circuit is configured to suspend the on/off control and reset the period when the output current becomes lower than a first threshold value during the on-period.

Abstract: A light-emitting element driving device includes: a first amplifier configured, with respect to each of a plurality of light-emitting element strings, to control a first transistor connected in series with the light-emitting element string based on the current passing through the light-emitting element string; and a second amplifier configured, with respect to each of at least part of the plurality of light-emitting element strings, a second transistor, which is included in a series circuit composed of the second transistor and a first resistor and connected in parallel with the first transistor, based on the current passing through the light-emitting element string and the current passing through the second transistor.

Abstract: A light-emitting element driving device includes: a first amplifier configured, with respect to each of a plurality of light-emitting element strings, to control a first transistor connected in series with the light-emitting element string based on the current passing through the light-emitting element string; and a second amplifier configured, with respect to each of at least part of the plurality of light-emitting element strings, a second transistor, which is included in a series circuit composed of the second transistor and a first resistor and connected in parallel with the first transistor, based on the current passing through the light-emitting element string and the current passing through the second transistor.

Abstract: A light emitting element drive device generates a single output current while switching a target current value for each of a plurality of light emitting elements, and supplies the single output current to the plurality of light emitting elements in a time division manner.

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage at a light emission reference voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a light emission reference voltage (VH12) higher than the light emission reference voltage (VH2), the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a light emission reference voltage (VHa); a semiconductor chip (IC1) including a light emission control unit (HC1) arranged to perform light emission control to cause light emission of a light emitting element group (HS) if a drive voltage (Vk) is higher than the light emission reference voltage (VHa), and to perform light emission stop control to stop the light emission if the drive voltage (Vk) is lower than the same; and a semiconductor chip (IC2) including a light emission control unit (HC2) arranged to perform lig

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage at a light emission reference voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a light emission reference voltage (VH12) higher than the light emission reference voltage (VH2), the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a light emission reference voltage (VHa); a semiconductor chip (IC1) including a light emission control unit (HC1) arranged to perform light emission control to cause light emission of a light emitting element group (HS) if a drive voltage (Vk) is higher than the light emission reference voltage (VHa), and to perform light emission stop control to stop the light emission if the drive voltage (Vk) is lower than the same; and a semiconductor chip (IC2) including a light emission control unit (HC2) arranged to perform lig

Abstract: Provided is a load drive device comprising: a first input terminal for accepting an input of a first input current from a power source; a second input terminal for accepting an input of a second input current from the power source via an external resistor; an output terminal for outputting an output current to a load; a current distribution unit for summing the first input current and second input current at a prescribed distribution ratio and generating the output current and a control unit for controlling the distribution ratio. As one example, it would be appropriate for the control unit to control the distribution ratio according to the difference between a first terminal voltage present in the second input terminal and a second terminal voltage present in the output terminal.

Abstract: The dialysate for hemodialysis has a dissolved hydrogen concentration of 30-550 ppb. This dialysate can eliminate active oxygen and reduce oxidative stress.

Abstract: A light emitting element driving semiconductor integrated circuit constitutes at least a part of a light emitting element driving device arranged to drive a series connection unit including a plurality of light emitting elements. The light emitting element driving semiconductor integrated circuit includes a single-element short-circuit detection unit arranged to detect that one of the plurality of light emitting elements is short-circuited, and a control unit arranged to control a power element of the light emitting element driving device so that current supplied from the light emitting element driving device to the series connection unit is increased, when the single-element short-circuit detection circuit detects that one of the plurality of light emitting elements is short-circuited.

Abstract: Provided is a light-emitting element drive device including a transistor control unit arranged to drive and control a transistor connected to a light-emitting element, an output ground fault detection unit arranged to output an output ground fault detection signal corresponding to the voltage level at a connection node between the light-emitting element and the transistor, a stop control unit arranged to stop driving the transistor when the output ground fault detection signal indicates an output ground fault, and a mask signal generation unit arranged to generate a mask signal that masks the output ground fault detection signal on device startup.

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage at a light emission reference voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a light emission reference voltage (VH12) higher than the light emission reference voltage (VH2), the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a light emission reference voltage (VHa); a semiconductor chip (IC1) including a light emission control unit (HC1) arranged to perform light emission control to cause light emission of a light emitting element group (HS) if a drive voltage (Vk) is higher than the light emission reference voltage (VHa), and to perform light emission stop control to stop the light emission if the drive voltage (Vk) is lower than the same; and a semiconductor chip (IC2) including a light emission control unit (HC2) arranged to perform lig

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a voltage (VH12) higher than VH2, the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a voltage (VHa); an IC1 including a light emission control unit (HC1) arranged to cause light emission of a light emitting element group (HS) if a voltage (Vk) is higher than VHa, and to stop the light emission if Vk is lower than the same; and an IC2 including a light emission control unit (HC2) arranged to cause light emission of a group (HSa) if Vk is higher than VHa, and to turn off the group (HSa) if Vk is lower than the same.

Abstract: Provided is a light-emitting element drive device including a transistor control unit arranged to drive and control a transistor connected to a light-emitting element, an output ground fault detection unit arranged to output an output ground fault detection signal corresponding to the voltage level at a connection node between the light-emitting element and the transistor, a stop control unit arranged to stop driving the transistor when the output ground fault detection signal indicates an output ground fault, and a mask signal generation unit arranged to generate a mask signal that masks the output ground fault detection signal on device startup.

Abstract: The present invention provides a light emitting diode (LED) driving device as a semiconductor device, which comprises: a direct current/direct current (DC/DC) controller, for controlling an output segment that is used to generate an output voltage from an input voltage and supply the output voltage to an LED; an output current driver, for generating an output current of the LED; and an LED short-circuit detection circuit, for monitoring a cathode voltage of the LED to perform an LED short-circuit detection, wherein the LED short-circuit detection circuit controls whether an action is performed or not according to a short-circuit detection enable signal input from outside the LED driving device.

Abstract: A light emitting element driving device includes a first and second driving circuits, an abnormality detecting portion, a bypass path, and a switching portion. The first driving circuit can supply power to a light emitting element in a first mode, and is disabled to supply power in a mode other than the first mode. The second driving circuit can supply power to a light emitting element in a second mode. The abnormality detecting portion detects an abnormality of the light emitting element normally connected to the second driving circuit at least in the second mode. The bypass path connects the first driving circuit to the second driving circuit. The switching portion is disposed in the bypass path so as to make the bypass path into a conductive state when an abnormality is detected, and to make the bypass path into a cutoff state when an abnormality is not detected.

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a voltage (VH12) higher than VH2, the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a voltage (VHa); an IC1 including a light emission control unit (HC1) arranged to cause light emission of a light emitting element group (HS) if a voltage (Vk) is higher than VHa, and to stop the light emission if Vk is lower than the same; and an IC2 including a light emission control unit (HC2) arranged to cause light emission of a group (HSa) if Vk is higher than VHa, and to turn off the group (HSa) if Vk is lower than the same.

Abstract: A lighting device includes light emitting element groups (HSB) including a light emitting element group (HS2) that emits light when being applied with a voltage (VH2), and a light emitting element group (HS12) that emits light when being applied with a voltage (VH12) higher than VH2, the light emitting element groups (HSB) emitting light when being applied with a voltage equal to or higher than a voltage (VHa); an IC1 including a light emission control unit (HC1) arranged to cause light emission of a light emitting element group (HS) if a voltage (Vk) is higher than VHa, and to stop the light emission if Vk is lower than the same; and an IC2 including a light emission control unit (HC2) arranged to cause light emission of a group (HSa) if Vk is higher than VHa, and to turn off the group (HSa) if Vk is lower than the same.

Abstract: A light emitting element driving semiconductor integrated circuit constitutes at least a part of a light emitting element driving device arranged to drive a series connection unit including a plurality of light emitting elements. The light emitting element driving semiconductor integrated circuit includes a single-element short-circuit detection unit arranged to detect that one of the plurality of light emitting elements is short-circuited, and a control unit arranged to control a power element of the light emitting element driving device so that current supplied from the light emitting element driving device to the series connection unit is increased, when the single-element short-circuit detection circuit detects that one of the plurality of light emitting elements is short-circuited.