JP2019033648A - Power supply device, luminaire, and control method - Google Patents

Abstract

To increase a degree of freedom of arrangement while maintaining reliability of operations.SOLUTION: A power supply device 42 includes a first conversion circuit 43c, a first control circuit 43d, a second conversion circuit 44a, a second control circuit 44b, a first substrate 431, and a second substrate 441. On the first substrate 431, a plurality of first circuit components 432 constituting the first conversion circuit 43c and the first control circuit 43d are mounted. On the second substrate 441, a plurality of second circuit components 442 constituting the second conversion circuit 44a and the second control circuit 44b are mounted. The first control circuit 43d controls the first conversion circuit 43c by power supply from the second control circuit 44b. The second control circuit 44b monitors an AC power to be input and supplies power to the first control circuit 43d only when the AC power is input to the first conversion circuit 43c.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a power supply device, a lighting device, and a control method, and more particularly to a power supply device that supplies predetermined DC power to a load, a lighting device including the power supply device, and a control method.

  As a conventional example, a power supply device described in Patent Document 1 is illustrated. This power supply device includes a regular lighting device and an emergency lighting device. The regular lighting device includes a first circuit board, and a terminal section, a rectifier, a switching power supply section, a boost chopper circuit, and a buck converter circuit are mounted on the first circuit board. The emergency lighting device includes a second circuit board, and a terminal portion, an emergency power supply terminal, a charging circuit, and a lighting circuit are mounted on the second circuit board. Patent Document 1 describes that the first circuit board and the second circuit board are separate substrates that are separated from each other, and that these are connected to each other via a terminal portion or a connector. .

  In this patent document 1, the emergency lighting device and the emergency lighting device are configured by separate circuit boards, so that the emergency lighting device can be made different from the change in circuit specifications, for example, the common regular lighting device. It is described as easy.

Japanese Patent Laid-Open No. 2006-207311

  By the way, when the power supply device is used in a lighting device, for example, depending on the shape or size of the housing of the lighting device that houses the power supply device, the first circuit board of the regular lighting device of Patent Document 1 is further replaced with two circuit boards. In some cases, it may be desirable to divide them. Thereby, the freedom degree of arrangement | positioning of the circuit board regarding the regular lighting device in a housing | casing is further raised.

  However, Patent Document 1 merely describes only that the service lighting device and the emergency lighting device are configured by separate circuit boards. If the regular lighting device described in Patent Document 1 is divided into two circuit boards at appropriate positions, and these are simply electrically connected by cables (electric wires), abnormalities such as disconnection of the cable or disconnection of the connector. If this occurs, there is a possibility that inappropriate operations will be performed. Further, there is a possibility that the cable becomes an antenna and an electromagnetic noise failure occurs, resulting in unstable operation.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a power supply device, a lighting device, and a control method that can increase the degree of freedom in arrangement while maintaining operation reliability.

  A power supply device according to one embodiment of the present invention includes a first conversion circuit, a first control circuit, a second conversion circuit, a second control circuit, a first substrate, and a second substrate. The first conversion circuit converts input AC power into first DC power. The first control circuit controls the first conversion circuit. The second conversion circuit converts the first DC power into second DC power having a voltage level different from the voltage level of the first DC power and supplies the second DC power to a load. The second control circuit controls the second conversion circuit. A plurality of first circuit components constituting the first conversion circuit and the first control circuit are mounted on the first substrate. A plurality of second circuit components constituting the second conversion circuit and the second control circuit are mounted on the second substrate. The output terminal of the first conversion circuit and the input terminal of the second conversion circuit are electrically connected to each other. The first control circuit is electrically connected to the second control circuit and controls the first conversion circuit by being supplied with power from the second control circuit. The second control circuit is configured to monitor the input AC power. The second control circuit is configured to supply power to the first control circuit only when the AC power is input to the first conversion circuit.

  An illumination device according to one embodiment of the present invention includes the power supply device and a solid light source as the load.

  The control method which concerns on 1 aspect of this invention is equipped with converting the input alternating current power into 1st direct current power by the 1st conversion circuit by which the circuit component was mounted in the 1st board | substrate. In the control method, the first DC power is converted into second DC power having a voltage level different from the voltage level of the first DC power by a second conversion circuit having circuit components mounted on the second substrate. Supplying to the load. Furthermore, the control method includes monitoring the AC power input to the first conversion circuit, and controlling the first conversion circuit only when the AC power is input to the first conversion circuit. Supplying power to the power source.

  The present invention has an advantage that the degree of freedom in arrangement can be increased while maintaining the reliability of operation.

FIG. 1 is a schematic circuit block diagram of a power supply device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment of the present invention. FIG. 3 is a plan view of a power supply unit including the above power supply apparatus. FIG. 4 is an exploded perspective view of the power supply unit. FIG. 5 is a plan view of the LED module in the illumination device same as above. FIG. 6 is an exploded perspective view of a lighting fixture provided with the lighting device same as above.

(1) Outline The following embodiment is only one of various embodiments of the present invention. The following embodiments can be variously modified according to the design or the like as long as the object of the present invention can be achieved.

  As shown in FIG. 1, the power supply device 42 of the present embodiment is configured to supply predetermined DC power to a load. The load of this embodiment is a solid light source as an example. As shown in FIG. 1, the power supply device 42 is used in the illumination device 2 including, for example, a plurality of LED (Light Emitting Diode) elements 52 (52a, 52b) and 53 (53a, 53b) as a solid light source. However, the solid light source is not limited to the LED element, and may be a solid light source other than the LED element such as an organic electroluminescence element.

  As shown in FIG. 1, the power supply 42 includes a first conversion circuit 43c, a first control circuit 43d, a second conversion circuit 44a, a second control circuit 44b, a first substrate 431, and a second substrate 441. And. The first conversion circuit 43c converts input AC power into first DC power. The first control circuit 43d controls the first conversion circuit 43c. The second conversion circuit 44a converts the first DC power into second DC power having a voltage level different from the voltage level of the first DC power, and supplies the second DC power to the load (LED elements 52, 53). The second control circuit 44b controls the second conversion circuit 44a.

  A plurality of first circuit components 432 constituting the first conversion circuit 43c and the first control circuit 43d are mounted on the first substrate 431. A plurality of second circuit components 442 constituting the second conversion circuit 44a and the second control circuit 44b are mounted on the second substrate 441. The output terminals T1 and T2 of the first conversion circuit 43c and the input terminals T3 and T4 of the second conversion circuit 44a are electrically connected to each other.

  The first control circuit 43d is electrically connected to the second control circuit 44b, and controls the first conversion circuit 43c by being supplied with power from the second control circuit 44b. The second control circuit 44b is configured to monitor the input AC power (pulsating voltage Vr). The second control circuit 44b is configured to supply power to the first control circuit 43d only when AC power is input to the first conversion circuit 43c.

  According to this configuration, the second control circuit 44b is configured to supply power to the first control circuit 43d only when AC power is input to the first conversion circuit 43c. Therefore, for example, even when it is required to divide the circuit board into two parts and accommodate it in the case in consideration of the circuit board placement space, it is possible to freely arrange the circuit while maintaining operation reliability. The degree can be increased.

(2) Details (2.1) Overall Configuration of Lighting Device Hereinafter, the power supply device 42 of this embodiment and the lighting device 2 including the power supply device 42 will be described in detail with reference to FIGS. As shown in FIG. 2, the illumination device 2 includes a case 3, a power supply unit 4, an LED module 5, and two lens blocks 6. Below, the up-down, left-right, front-back direction of the illuminating device 2 will be defined and described using the up-down, left-right, front-back arrows shown in FIG. These arrows are described only for the purpose of assisting the explanation, and are not accompanied by an entity.

(2.2) Case As shown in FIG. 2, the case 3 includes a first case 31 and a second case 32. The first case 31 is formed of a metal plate such as a steel plate in a rectangular box shape having an opening on the lower surface. The second case 32 is formed in a substantially rectangular plate shape by a metal plate such as a steel plate. An oval recess 311 is formed at the center of the upper surface of the first case 31, and a circular hole 312 passes through the center of the recess 311 in the vertical direction. A circular hole 321 passes through the center of the second case 32 in the vertical direction. Further, a rectangular through hole 324 penetrates in the vertical direction on one end side in the longitudinal direction of the second case 32.

  A flange 313 is formed along the longitudinal direction at the edge of the lower surface opening of the first case 31. The longitudinal edge of the second case 32 is bent downward, and the second case 32 has a pair of side walls 322 along the longitudinal direction (left-right direction) at the front and rear ends thereof. Further, a flange 323 is formed at the lower end of each side wall 322 along the longitudinal direction. The second case 32 is attached to the first case 31 so as to cover the lower surface of the first case 31 by screwing the flange portion 323 to the flange portion 313. That is, the first case 31 and the second case 32 are coupled to each other to form the rectangular box-shaped case 3. A power supply unit 4 is accommodated inside the case 3.

(2.3) LED Module As shown in FIGS. 2 and 5, the LED module 5 includes two LED substrates 51 and a plurality of LED elements 52 mounted on a mounting surface 51 a (lower surface) of each LED substrate 51. And 53 (load). Each LED substrate 51 is formed in a rectangular shape elongated in the left-right direction. The two LED substrates 51 have the same shape and dimensions. The two LED substrates 51 are formed of, for example, a glass cloth base epoxy resin substrate.

  As shown in FIG. 5, the two LED substrates 51 are arranged such that the first ends 51 b in the longitudinal direction face each other. Each LED substrate 51 has a semicircular cutout 51c in the center of the first end 51b. By arranging so that the first ends 51b of the two LED substrates 51 face each other, the notches 51c of the two LED substrates 51 form one circular through hole 51d.

  On the mounting surface 51a of each LED substrate 51, a plurality of LED elements 52 are mounted in, for example, four rows so as to be aligned along the longitudinal direction of the LED substrate 51 in the mounting region 51g. In the present embodiment, the plurality of LED elements 52 include a daylight color LED element 52a and a light bulb color LED element 52b. Further, on the mounting surface 51a of each LED substrate 51, a plurality of bulb-colored LED elements 53 are mounted side by side in the longitudinal direction in the vicinity of the front edge and the vicinity of the rear edge. In the present embodiment, the LED element arranged near the front edge is called an LED element 53a, and the LED element arranged near the rear edge is called an LED element 53b.

  On the mounting surface 51a (lower surface) and back surface (upper surface) of the LED substrate 51, a conductor (copper foil) electrically connected to the plurality of LED elements 52 and 53 is formed. The conductor on the mounting surface 51a and the conductor on the back surface may be electrically connected to each other through a through hole provided in the LED substrate 51 if necessary.

  The LED substrate 51 is attached to the lower surface of the second case 32 by screws inserted into the four positioning holes 51h.

  The two LED substrates 51 are electrically connected to each other via a plurality of electric wires 54 as shown in FIG. Specifically, receptacle connectors 541 a and 542 a are mounted on the mounting surface 51 a of each LED substrate 51. The receptacle connectors 541a and 542a are arranged side by side in the lateral direction of the LED substrate 51 with the mounting region 51g interposed therebetween. The receptacle connectors 541a and 542a are electrically connected to the conductors of the LED substrate 51. The receptacle connector 541a is electrically and mechanically connected to the plug connector 541b so as to be insertable / removable. One receptacle connector 541a and one plug connector 541b constitute one connector 541. The two plug connectors 541b are electrically connected by a plurality of electric wires 54.

  The number of the electric wires 54 of this embodiment is four as an example. The plurality of LED elements 52 and 53 mounted on one LED substrate 51 and the plurality of LED elements 52 and 53 mounted on the other LED substrate 51 are electrically connected in series by four electric wires 54, respectively. Connected.

  That is, the plurality of LED elements 52a mounted on the two LED boards 51 are electrically connected in series, and the plurality of LED elements 52b mounted on the two LED boards 51 are electrically connected in series. Yes. Further, the plurality of LED elements 53a mounted on the two LED substrates 51 are electrically connected in series, and the plurality of LED elements 53b mounted on the two LED substrates 51 are electrically connected in series. Yes.

  Of the two LED boards 51, the receptacle connector 542a of one LED board 51 is electrically and mechanically connected to a plug connector 542b to which a plurality of electric wires 461 are connected. Of the two LED substrates 51, the receptacle connector 542a of the other LED substrate 51 is electrically and mechanically connected to a plug connector 542b to which a plurality of electric wires 462 are connected. One receptacle connector 542 is composed of one receptacle connector 542a and one plug connector 542b.

  That is, of the two LED boards 51, one LED board 51 is electrically connected to each positive potential of load voltages V21-V24 output from step-down chopper circuits PS1-PS4 described later. The other LED board 51 is electrically connected to each negative potential of the load voltages V21 to V24 output from the step-down chopper circuits PS1 to PS4, respectively. That is, each of the step-down chopper circuits PS <b> 1 to PS <b> 4 can cause a load current to flow through each closed loop via the electric wire 461, one LED substrate 51, the electric wire 54, the other LED substrate 51, and the electric wire 462.

(2.4) Lens Block Each of the two lens blocks 6 has a substantially rectangular base 60 and a plurality of lenses 61 as shown in FIG. The plurality of lenses 61 are mounted in four rows so as to be arranged along the longitudinal direction of the base 60 on the lower surface of the base 60. Each lens 61 has a convex shape protruding downward on the lower surface of the base 60. The base 60 and the plurality of lenses 61 are integrally formed of, for example, a molded body of glass or a transparent synthetic resin (acrylic resin or polycarbonate resin).

  The base 60 is formed with a pair of triangular ribs 601 protruding outward from the centers of both side edges, and cylindrical positioning protrusions 602 protrude upward on the lower surface of the rib 601. Then, the two projections 602 are engaged with the two positioning holes 51j (see FIG. 5) formed in the LED substrate 51 in a one-to-one relationship, whereby the lens block 6 is positioned with the LED substrate 51.

  An arcuate cutout 60 b is formed at the first end 60 a in the longitudinal direction of the base 60. Furthermore, a substantially rectangular light transmitting window 60d is formed at the second end 60c in the longitudinal direction of the base 60 (the end opposite to the first end 60a). The lens block 6 after positioning is arranged on the mounting surface 51 a of the LED substrate 51 so that the arc-shaped notch 60 b is along the semicircular notch 51 c of the LED substrate 51. Accordingly, the two lens blocks 6 are respectively attached to the two LED substrates 51 such that the first ends 60a face each other.

  The translucent window 60d faces the notch 51f formed in the LED substrate 51. Of the two lens blocks 6, the light transmission window 60 d of one lens block 6 is a nightlight disposed on the second substrate 441 of the power supply unit 4 to be described later via the notch 51 f and the through hole 324. And an infrared light receiving element (not shown). The plurality of lenses 61 face the plurality of LED elements 52 on a one-to-one basis, and are provided below the mounting region 51 g of the LED substrate 51.

(2.5) Power Supply Unit (2.5.1) Overall Configuration The power supply unit 4 includes a mounting base 40, a holder 41, and a power supply device 42, as shown in FIGS. The power supply device 42 is configured to convert AC power supplied from an AC power supply E1 (for example, commercial AC power supply) into DC power and supply DC power to the LED module 5. The power supply device 42 includes a first circuit block 43, a second circuit block 44, and a connection portion CN1. The connection portion CN1 is for electrically connecting the first circuit block 43 and the second circuit block 44 to each other, and includes a pair of first electric wires L11, L11, a second electric wire L12, and a third electric wire L13. And have. In this embodiment, the 1st electric wires L11 and L11, the 2nd electric wire L12, and the 3rd electric wire L13 are bundled with the sheath, and comprise one cable, as shown in FIG.

  As shown in FIG. 1, the AC power supply E <b> 1 outputs an AC voltage Vac to the power supply device 42. It should be noted that the input of AC voltage Vac from AC power supply E1 to power supply device 42 can be turned on and off by a switch SW0 (see FIG. 1) provided in the middle of the electrical path connecting AC power supply E1 and power supply device 42. It is desirable to be configured.

(2.5.2) Power supply device (first circuit block)
Hereinafter, the first circuit block 43 will be described with reference to FIG. The first circuit block 43 receives the AC voltage Vac from the AC power source E1, performs a boosting operation, and outputs a boosted DC voltage (boosted voltage), and a first circuit block 43 that controls the power factor improving circuit 43a. And a control circuit 43d. The power factor correction circuit 43a includes an input circuit 43b, a first conversion circuit 43c, and an inrush current prevention circuit 43e.

  The input circuit 43b includes, for example, a filter circuit and a diode bridge circuit (rectifier circuit) including a plurality of diodes (not shown). The input circuit 43b generates a pulsating voltage Vr obtained by full-wave rectifying the AC voltage Vac input to the power factor correction circuit 43a and outputs it to the first conversion circuit 43c.

  The inrush current prevention circuit 43e is composed of, for example, a thermistor, and is inserted between the input circuit 43b (the positive-side output end thereof) and the first conversion circuit 43c (the positive-side input end). The inrush current prevention circuit 43e suppresses the inrush current (overcurrent) immediately after the power is turned on from flowing into the first conversion circuit 43c.

  The first conversion circuit 43c is configured to convert input AC power (pulsating voltage Vr) into first DC power. The first conversion circuit 43c is, for example, a boost chopper circuit. The first conversion circuit 43c boosts the pulsating voltage Vr and generates a DC voltage Vdc (boost voltage Vdc) as the first DC power. The first conversion circuit 43c has a smoothing capacitor C1 (first capacitor) connected between the pair of output terminals T1 and T2. The capacitor C1 is, for example, an electrolytic capacitor. The DC voltage Vdc is smoothed by the capacitor C1 and output to the second circuit block 44 at the subsequent stage. In FIG. 1, the circuit elements (semiconductor switching elements and the like) constituting the first conversion circuit 43c other than the capacitor C1 are not shown.

  The first control circuit 43d is composed of, for example, a computer and a driver circuit. The first control circuit 43d is configured to perform switching control and the like of the semiconductor switching element in the first conversion circuit 43c when the computer executes a program. This computer mainly comprises a device having a processor for executing a program, an interface device for transmitting / receiving signals to / from other devices, and a storage device for storing programs, data, and the like. Prepare as an element. The device provided with the processor may be a CPU (Central Processing Unit) or MPU (Micro Processing Unit) which is a separate body from the storage device, or a microcomputer integrally including a storage device. A storage device such as a semiconductor memory that has a short access time is mainly used as a storage device. As a program providing form, there are a form stored in advance in a recording medium such as a semiconductor memory readable by a computer or an optical disc, a form supplied to the recording medium via a wide area communication network including the Internet, and the like.

  In short, the circuit control of the first conversion circuit 43c is performed by the first control circuit 43d. However, the first control circuit 43d is configured to receive the control voltage (control power supply) Vcc from the second control circuit 44b of the second circuit block 44 described later. In other words, when the supply of the control voltage Vcc from the second control circuit 44b is stopped, the operation of the first conversion circuit 43c is stopped.

  The first circuit block 43 further includes a first substrate (power supply substrate) 431 that is a printed wiring board. A plurality of first circuit components 432 constituting the input circuit 43b, the inrush current prevention circuit 43e, the first conversion circuit 43c, and the first control circuit 43d described above are mounted on the first substrate 431. The plurality of first circuit components 432 include semiconductor switching elements, thermistors, inductors, diodes, capacitors, resistors, integrated circuit components for arithmetic processing, driver circuit components, and the like.

(2.5.3) Power supply device (second circuit block)
Hereinafter, the second circuit block 44 will be described with reference to FIG. The second circuit block 44 includes a second conversion circuit 44a and a second control circuit 44b. The second conversion circuit 44a converts the first DC power into second DC power having a voltage level different from the voltage level of the first DC power, and supplies the second DC power to the plurality of LED elements 52 and 53 of the LED module 5 that is a load. Is configured to do. The second conversion circuit 44a steps down the boosted voltage Vdc (first DC power) output from the first circuit block 43 to the second DC power and supplies a DC load current to the LED module 5. A DC converter is configured.

  Here, the pair of input terminals T3 and T4 of the second conversion circuit 44a and the pair of output terminals T1 and T2 of the first conversion circuit 43c of the first circuit block 43 are electrically connected to each other. . Specifically, the pair of input ends T3, T4 and the pair of output ends T1, T2 are connected via a pair of first electric wires L11, L11 (DC voltage line and ground line) of the connection portion CN1. Yes.

  The second conversion circuit 44a includes a filter circuit 440a and a step-down chopper block 440b. The filter circuit 440a includes, for example, an inductor L1 and a capacitor C2 (second capacitor). The filter circuit 440a is provided as a preceding circuit of the step-down chopper block 440b, and attenuates harmonic components generated by the switching operation of the step-down chopper block 440b. Note that the filter circuit 440a has a cutoff frequency that is not less than twice the frequency of the AC voltage (for example, 50 Hz or 60 Hz) and not more than the minimum value of the oscillation frequency of the first conversion circuit 43c or the second conversion circuit 44a. It is preferable.

  The step-down chopper block 440b has four step-down chopper circuits PS1-PS4. The four step-down chopper circuits PS1 to PS4 step down the boosted voltage Vdc output from the first circuit block 43 and whose harmonic components are attenuated by the filter circuit 440a to voltages V21 to V24 (load voltages V21 to V24), respectively. To do. The four step-down chopper circuits PS1-PS4 output the load voltages V21-V24 to the LED elements 52a, 52b, 53a, 53b, respectively. Therefore, the load voltages V21 to V24, which are DC voltages, are respectively applied to these LED elements, and the current flowing through each LED element is also controlled to a predetermined constant current. The second conversion circuit 44a may include an insulated DC-DC converter (for example, a flyback converter) instead of the non-insulated DC-DC converter (step-down chopper circuit PS1-PS4).

  The second control circuit 44b includes a control power circuit CP1 and a control block CB1. The circuit control of the step-down chopper block 440b is performed by the second control circuit 44b.

  The control power supply circuit CP1 generates a control voltage (control power supply) Vcc for driving the power supply device 42. In the present embodiment, the control power supply circuit CP1 generates the control voltage Vcc from the boosted voltage Vdc whose harmonic components are attenuated by the filter circuit 440a. However, the control power supply circuit CP1 may generate the control voltage Vcc from the boosted voltage Vdc before being input to the filter circuit 440a.

  The control block CB1 includes a computer and a driver circuit. The control block CB1 is configured to perform switching control and the like of the semiconductor switching elements in the step-down chopper block 440b when the computer executes a program. In addition to the computer and driver circuit, the control block CB1 includes peripheral circuits such as a buzzer, a nightlight LED element, and an infrared light receiving element. These peripheral circuits are protected by a cylinder 325 shown in FIG. 2 so as to cover the periphery. The infrared light receiving element can receive an infrared signal transmitted from an infrared remote controller through the transparent window 60d. The control block CB1 preferably performs lighting control of the LED module 5 in accordance with a command included in an infrared signal received by the infrared light receiving element.

  The computer mainly includes a device including a processor for executing a program, an interface device for transmitting and receiving signals to and from other apparatuses, and a storage device for storing programs, data, and the like. Prepare as an element. The device provided with the processor may be any one of a microcomputer integrally provided with a storage device, in addition to a CPU or MPU that is separate from the storage device. A storage device such as a semiconductor memory that has a short access time is mainly used as a storage device. As a program providing form, there are a form stored in advance in a recording medium such as a semiconductor memory readable by a computer or an optical disc, a form supplied to the recording medium via a wide area communication network including the Internet, and the like.

  The second circuit block 44 further includes a second substrate (power supply substrate) 441 that is a printed wiring board. That is, in the power supply device 42 of the present embodiment, the second substrate 441 is provided separately from the first substrate 431. A plurality of second circuit components 442 constituting the second conversion circuit 44a and the second control circuit 44b described above are mounted on the second substrate 441. The plurality of second circuit components 442 includes semiconductor switching elements, inductors, diodes, capacitors, resistors, integrated circuit components for arithmetic processing, driver circuit components, and the like.

  By the way, the second control circuit 44b is electrically connected to the first control circuit 43d of the first circuit block 43 via the third electric wire L13 (control line) of the connection portion CN1. The second control circuit 44b not only supplies the control voltage Vcc generated by the control power circuit CP1 to the computer of its own control block CB1, but also supplies the third control circuit 43d of the first circuit block 43 to the third control circuit 43b. It is comprised so that it may supply via the electric wire L13.

  However, the second control circuit 44b further monitors (detects) the pulsating voltage Vr input to the input terminal of the first conversion circuit 43c via the second electric wire L12 of the connection portion CN1, and the pulsating voltage Vr is detected. A determination process for determining whether or not the signal is input to the first conversion circuit 43c is performed. That is, the second electric wire L12 (input detection line) is an electric wire for notifying the second circuit block 44 from the first circuit block 43 that the supply of AC power to the power factor correction circuit 43a has started. . The second control circuit 44b supplies the control voltage Vcc to the first control circuit 43d only when it is determined that the pulsating voltage Vr is input to the first conversion circuit 43c. For this determination process, the second control circuit 44b determines that the pulsating voltage Vr is input to the first conversion circuit 43c, for example, by periodically zero-crossing a voltage signal corresponding to the pulsating voltage Vr. .

(2.5.4) Mounting base and wiring area Hereinafter, the mounting base 40 and the power supply unit 4 will be described with reference to FIGS. The mounting base 40 is formed in a rectangular flat plate shape using an electrically insulating material such as synthetic resin. An elliptical hole 401 passes through the mounting base 40 in the vertical direction. A long cylindrical partition wall 402 protruding downward is provided around the hole 401 on the lower surface of the mounting base 40.

  The first circuit block 43 and the second circuit block 44 are disposed along the longitudinal direction of the mounting base 40 with the partition wall 402 interposed therebetween, and the first substrate 431 and the second substrate 441 are disposed on the lower surface of the mounting base 40. Screwed and attached. That is, the power supply device 42 is attached to the lower surface of the mounting base 40.

  Here, the first substrate 431 of the power supply device 42 is formed in a rectangular plate shape, and has insertion holes 436 (only two are shown in FIG. 4) at three corners as shown in FIG. Yes. Further, as shown in FIGS. 3 and 4, three positioning protrusions 405 a protrude from the lower surface of the mounting base 40 at the place where the first substrate 431 is disposed. The three protrusions 405a are inserted into the three insertion holes 436, respectively, so that the first substrate 431 is positioned on the lower surface of the mounting base 40. A locking claw 407 a is formed on the outer peripheral side of the partition wall 402. And the latching claw 407a presses the surface 433 (lower surface) of the first substrate 431, whereby the first substrate 431 is positioned in the vertical direction.

  The second substrate 441 of the power supply device 42 is formed in a rectangular plate shape, and has insertion holes 448 at four corners as shown in FIG. Further, as shown in FIGS. 3 and 4, three positioning protrusions 405 b protrude from the lower surface of the mounting base 40 at the place where the second substrate 441 is disposed. The second substrate 441 is positioned on the lower surface of the mounting base 40 by inserting three of the four insertion holes 448 into the three protrusions 405b. Further, a locking claw 407 b is formed on the outer peripheral side of the partition wall 402, and a locking claw 407 c is formed on the right end portion of the mounting base 40. And the latching claws 407b and 407c hold down the surface 443 (lower surface) of the second substrate 441, whereby the second substrate 441 is positioned in the vertical direction.

  Further, as shown in FIG. 4, a convex wall 409 having a substantially rectangular frame shape is formed on the lower surface of the mounting base 40 at a location facing the back surface 434 (upper surface) of the first substrate 431. A thermal sheet made of silicon or the like is arranged inside. The thermal sheet efficiently dissipates heat from the first substrate 431 by transmitting heat generated by the first substrate 431 to the mounting base 40.

  Conductors (copper foil) electrically connected to the plurality of first circuit components 432 are formed on the front surface 433 (lower surface) and the rear surface 434 (upper surface) of the first substrate 431. The conductor on the front surface 433 and the conductor on the back surface 434 may be electrically connected to each other through a through hole provided in the first substrate 431 if necessary.

  Here, a receptacle connector 430 a is mounted on the surface 433 of the first substrate 431. The hook sealing adapter 102 (see FIG. 6) is inserted into the tubular body 410 of the holder 41, and the receptacle connector 430a can be inserted into and removed from a plug connector (not shown) electrically connected to the electrode of the hook sealing adapter 102. Electrically and mechanically. The receptacle connector 430a receives AC power from the hook sealing adapter 102. In addition, the receptacle connector 430a is electrically connected to the conductor of the first substrate 431. In other words, the receptacle connector 430 a is electrically connected to the input terminal of the input circuit 43 b of the first circuit block 43. An electric wire holding part 404 a is provided on the outer surface of the partition wall 402. The electric wire holding part 404a holds an electric wire (not shown) connected to the receptacle connector 430a in order to suppress the tension applied to the electric wire.

  Further, a receptacle connector 435a is mounted on the surface 433 of the first substrate 431, and the receptacle connector 435a is electrically connected to the conductor of the first substrate 431. The receptacle connector 435a is electrically and mechanically connected to the plug connector 435b corresponding to the receptacle connector 435a in a one-to-one manner so as to be insertable / removable. Note that one receptacle connector 435 includes one receptacle connector 435a and one plug connector 435b.

  The plug connector 435b is electrically and mechanically connected to one end of the first electric wires L11, L11, the second electric wire L12, and the third electric wire L13 of the connection portion CN1. A plug connector 445b is electrically and mechanically connected to the other ends of these four electric wires. The plug connector 445b is electrically and mechanically connected to the receptacle connector 445a mounted on the front surface 443 (lower surface) of the second substrate 441 so as to be insertable / removable. Conductors (copper foil) electrically connected to the plurality of second circuit components 442 are formed on the front surface 443 and the back surface 444 (upper surface) of the second substrate 441. The conductor on the front surface 443 and the conductor on the back surface 444 may be electrically connected to each other through a through hole provided in the second substrate 441 if necessary. The receptacle connector 445a is electrically connected to the conductor of the second substrate 441. One receptacle connector 445a and one plug connector 445b constitute one connector 445. An electric wire holding part 404 b is provided on the outer surface of the partition wall 402. The electric wire holding portion 404b holds the connection portion CN1 in order to suppress the tension applied to the electric wire.

  As described above, the first circuit block 43 and the second circuit block 44 are electrically connected to each other through the connection portion CN1. In the present embodiment, the first electric wires L11, L11, the second electric wire L12, and the third electric wire L13 constitute a DC voltage line, a ground line, an input detection line, and a control line, respectively.

  As shown in FIGS. 3 and 4, in the second circuit block 44, two receptacle connectors 446 a and 447 a are further mounted on the surface 443 of the second substrate 441. Receptacle connector 446a is electrically connected to each positive potential of load voltages V21-V24 output from step-down chopper circuits PS1-PS4, respectively. Receptacle connector 447a is electrically connected to each negative potential of load voltages V21-V24 output from step-down chopper circuits PS1-PS4, respectively.

  The receptacle connector 446a is electrically and mechanically connected to the plug connector 446b corresponding to the receptacle connector 446a on a one-to-one basis so that it can be inserted and removed. The plug connector 446 b is electrically and mechanically connected to one end of the plurality of electric wires 461. The receptacle connector 447a is electrically and mechanically connected to the plug connector 447b corresponding to the receptacle connector 447a on a one-to-one basis so that it can be inserted and removed. The plug connector 447b is electrically and mechanically connected to one end of the plurality of electric wires 462. One receptacle connector 446a and one plug connector 446b constitute one connector 446. One receptacle connector 447a and one plug connector 447b constitute one connector 447.

  The outputs of the second conversion circuit 44a (the outputs of the step-down chopper circuits PS1 to PS4) are electrically connected to the LED module 5 via a plurality of electric wires 461 and 462.

(2.5.5) Holder Hereinafter, the holder 41 will be described in detail. As shown in FIG. 3, the holder 41 includes a cylindrical body 410 that supports the hooking sealing adapter 102 (see FIG. 6), and a fixing plate 411 that is formed integrally with the cylindrical body 410. The fixed plate 411 is formed in a circular flat plate shape with a synthetic resin. A circular hole passes through the center of the fixed plate 411. The cylinder 410 is formed in a cylindrical shape with synthetic resin. The cylinder 410 is formed integrally with the fixing plate 411 so as to protrude downward from the peripheral edge of the hole on the lower surface of the fixing plate 411. The fixing plate 411 of the holder 41 is screwed to the mounting base 40. The cylindrical body 410 of the holder 41 is disposed inside the partition wall 402 in a state where the fixing plate 411 is screwed to the mounting base 40. The long cylindrical internal space of the partition wall 402 is an elongated cylindrical insertion space 403, and the cylindrical body 410 of the holder 41 is disposed in the insertion space 403.

(2.5.6) Assembly of power supply device Here, the assembly of the power supply device 42 to the ceiling will be briefly described. As shown in FIG. 2, the power supply unit 4 is attached to the first case 31 and accommodated in the case 3 by the mounting base 40 being screwed to the first case 31. The lower end of the partition wall 402 of the mounting base 40 is inserted into the hole 321 of the second case 32. The hooking sealing adapter 102 (see FIG. 6) is inserted into the cylindrical body 410 of the holder 41. In other words, the hook ceiling adapter 102 corresponding to the power feeding unit is inserted into the insertion space 403 in the partition wall 402.

  The hook ceiling adapter 102 is detachably attached to the hook ceiling body 101 (see FIG. 6) installed on the ceiling. The case 3 is detachably attached to the hook ceiling adapter 102. That is, the case 3 is detachably attached to the hooking ceiling body 101 via the hooking ceiling adapter 102 and supported by the hooking ceiling body 101 via the hooking ceiling adapter 102. However, since the hooking sealing body 101 and the hooking sealing adapter 102 are well known in the art, illustration and description of the detailed configuration are omitted.

(2.5.7) Description of Operation of Power Supply Device Hereinafter, the operation of the power supply device 42 will be described with reference to FIG.

  First, the power supply device 42 in a case where none of the electric wires L11 to L13 is disconnected and no disconnection or loose contact state occurs in the connectors 435 and 445 (that is, no wiring abnormality has occurred). Will be described.

  For example, when the switch SW0 is switched from OFF to ON, supply of the AC voltage Vac from the AC power supply E1 is started. In the power factor correction circuit 43a of the first circuit block 43, the input circuit 43b generates a pulsating voltage Vr obtained by full-wave rectifying the AC voltage Vac, and outputs the pulsating voltage Vr to the first conversion circuit 43c via the inrush current prevention circuit 43e. .

  However, at this time, since the first control circuit 43d has not received the control voltage Vcc from the second control circuit 44b of the second circuit block 44, the boosting operation of the first conversion circuit 43c is not started. On the other hand, the capacitor C1 in the first conversion circuit 43c is charged to the peak voltage of the pulsating voltage Vr, and the capacitor C2 of the filter circuit 440a of the second circuit block 44 is also connected via the first electric wires L11 and L11. Charged.

  Then, the control power circuit CP1 of the second control circuit 44b generates a control voltage Vcc of, for example, 16V from the charged voltage across the capacitor C2, and supplies it to a computer (for example, a microcomputer) of the control block CB1. As a result, the computer of the control block CB1 starts operating.

  Next, the control block CB1 of the second control circuit 44b receives a voltage signal (AC power supply information) corresponding to the pulsating voltage Vr from the power factor correction circuit 43a via the second electric wire L12. The control block CB1 determines whether or not the pulsating voltage Vr is input to the first conversion circuit 43c based on the frequency of the voltage signal (based on the zero cross point). During the operation of the control block CB1, this determination process is periodically performed.

  Since the pulsating voltage Vr is input here, the second control circuit 44b supplies the control voltage Vcc to the computer (for example, a microcomputer) of the first control circuit 43d via the third electric wire L13. As a result, the computer of the first control circuit 43d starts to operate, and under the control of the first control circuit 43d, the boost operation of the first conversion circuit 43c is started. At this time, the second control circuit 44b preferably starts the step-down operation of the step-down chopper block 440b after confirming that the voltage boosted by the first conversion circuit 43c is in a normal range. Then, the LED elements 52 and 53 of the LED module 5 are lit by the start of the step-down operation of the step-down chopper block 440b.

  Subsequently, for example, when the switch SW0 is switched from on to off, or when a power failure occurs in the AC power supply E1, the control block CB1 does not input the pulsating voltage Vr to the first conversion circuit 43c through the determination process. Is determined. Then, the control block CB1 stops supplying the control voltage Vcc to the first control circuit 43d, and stops the boosting operation of the first conversion circuit 43c. The control block CB1 stops the step-down operation of the step-down chopper block 440b.

  Here, it is desirable that the control block CB1 can continue the operation for a predetermined time or more during a power failure of the AC power supply E1. Therefore, the total capacitance of the capacitor C1 and the capacitor C2 of the present embodiment supplies energy (power) for continuing the operation of the second control circuit 44b for a predetermined time or more to the control power supply circuit CP1 when the AC power supply E1 fails. Set to a possible capacitance. Therefore, at the time of a power failure of the AC power supply E1, the control block CB1 can quickly stop the step-up operation of the first conversion circuit 43c and the step-down operation of the step-down chopper block 440b, and the consumption of the control voltage Vcc can be suppressed. .

  By the way, a function (so-called one-two function) for switching the light output level of the LED module 5 from 100% to 50%, for example, by turning the switch SW0 from on to off again within 2 seconds, for example, is provided in the lighting device 2. May be granted. Considering this point, the above-mentioned predetermined time is preferably about 2 seconds or more. That is, during the one-two operation, when the switch SW0 is temporarily turned off, the capacitances of the capacitors C1 and C2 are set so that the control block CB1 can continue the operation for at least 2 seconds. preferable. In the one-two function, instead of switching the light output level, the lighting of the LED module 5 as the main light source and the lighting of the nightlight as the auxiliary light source may be switched alternately.

  Finally, the operation of the power supply device 42 when the first electric wire L11 is disconnected or when the connectors 435 and 445 are disconnected or loosely contacted (that is, when a wiring abnormality occurs) will be described.

  For example, when the switch SW0 is switched from OFF to ON, supply of the AC voltage Vac from the AC power supply E1 is started. In the power factor correction circuit 43a of the first circuit block 43, the input circuit 43b generates a pulsating voltage Vr obtained by full-wave rectifying the AC voltage Vac, and outputs the pulsating voltage Vr to the first conversion circuit 43c via the inrush current prevention circuit 43e. .

  However, since the first control circuit 43d has not received the control voltage Vcc from the second control circuit 44b of the second circuit block 44, the step-up operation of the first conversion circuit 43c is not started. On the other hand, the capacitor C1 in the first conversion circuit 43c is charged to the peak voltage of the pulsating voltage Vr. However, due to the occurrence of the wiring abnormality, the capacitor C2 of the filter circuit 440a of the second circuit block 44 is not charged. Therefore, the control voltage Vcc is not generated by the control power supply circuit CP1 of the second control circuit 44b, and as a result, the operation of the computer of the control block CB1 is not performed. Therefore, the control voltage Vcc is not supplied to the first control circuit 43d, and as a result, the boosting operation of the first conversion circuit 43c is also maintained in the stopped state.

  Therefore, it is possible to reduce the situation where the boosting operation of the first conversion circuit 43c is performed despite the occurrence of the wiring abnormality. Therefore, it is possible to suppress abnormal discharge from occurring at the location where the above-described wiring abnormality occurs. Further, it is possible to suppress unnecessary power consumption due to the operation of the first conversion circuit 43c when the wiring abnormality occurs.

  Even when the second electric wire L12 or the third electric wire L13 is disconnected, the control voltage Vcc is not supplied to the first control circuit 43d, and as a result, the boosting operation of the first conversion circuit 43c is maintained in the stopped state. Will be. Therefore, in this case as well, it is possible to suppress unnecessary power consumption due to the operation of the first conversion circuit 43c.

  Thus, in the illuminating device 2 having the power supply device 42 of the present embodiment, the insertion space 403 for inserting the hook ceiling adapter 102 is arranged at the center in the longitudinal direction of the case 3. For this reason, in consideration of the circuit board placement space, the case 3 is divided into two parts, the first board 431 and the second board 441 as in the present embodiment, and the circuit board sandwiches the insertion space 403 therebetween. May be required to contain.

  However, if the two divided circuit boards are simply electrically connected with a cable (electric wire), the reliability of the circuit operation may be impaired if an abnormality such as disconnection or disconnection of the cable occurs. Further, there is a possibility that the cable becomes an antenna and an electromagnetic noise failure occurs, resulting in unstable operation.

  On the other hand, in the present embodiment, as described above, the second control circuit 44b performs a determination process for determining whether or not the pulsating voltage Vr is input to the first conversion circuit 43c. The second control circuit 44b supplies the control voltage Vcc to the first control circuit 43d only when it is determined that the pulsating voltage Vr is input to the first conversion circuit 43c. Therefore, it is possible to increase the degree of freedom in the arrangement of the circuit board while maintaining the operation reliability.

  In particular, if the two divided circuit boards are simply connected by a cable, the cable becomes an antenna and there is a possibility that a failure of electromagnetic noise occurs. However, in the present embodiment, since the first electric wire L11 is a line through which the DC voltage Vdc (boosted voltage) is passed instead of the AC voltage, it is relatively difficult to be a noise generation source. Similarly, the third electric wire L13 is also a line through which the control voltage Vcc, which is a DC voltage, passes, and thus is relatively unlikely to generate noise. Further, the second electric wire L12 is also a line through which a voltage signal having a relatively low frequency passes, so it can be said that it is difficult to be a noise generation source.

  In the present embodiment, since the filter circuit 440a is provided in front of the step-down chopper block 440b, leakage of switching noise generated in the step-down chopper block 440b to the first electric wire L11 side is suppressed.

(3) Lighting fixture By the way, the lighting apparatus 2 of this embodiment may be used for the lighting fixture 1 shown, for example in FIG. The lighting fixture 1 includes a lighting device 2 and a fixture body 9 that supports the lighting device 2. The instrument main body 9 includes a cover 91, a frame 92, a globe 93, and a pair of light guide members 94 and 94.

  A frame 92 is screwed to the lower surface of the case 3 of the lighting device 2. The frame 92 includes a rectangular main frame 92a and a reinforcing frame 92b that connects the centers of a pair of side frames along the longitudinal direction of the main frame 92a in the lateral direction. Then, the protrusion protruding upward at the longitudinal edge of the main frame 92 a engages with the positioning hole provided in the LED substrate 51, whereby the frame 92 is positioned with the LED substrate 51.

  The light guide members 94 are screwed to the pair of side frames along the longitudinal direction of the main frame 92a. As shown in FIG. 6, the light guide member 94 includes a light guide panel 94a, guide portions 94b, and a plurality (four in the illustrated example) of attachment pieces 94c. The light guide panel 94a, the guide portion 94b, and the plurality of mounting pieces 94c are preferably formed of a light-transmitting synthetic resin such as an acrylic resin or a polycarbonate resin. Then, the attachment piece 94c is screwed to the main frame 92a.

  When each light guide member 94 is screwed to the main frame 92a, the LED element 53a is positioned above the guide portion 94b. The guide portion 94b has a reflecting plate that reflects light, and the light emitted from the LED element 53a is guided into the light guide panel 94a through the guide portion 94b and emitted from the light guide panel 94a.

  Further, a rectangular flat globe 93 is attached to the lower surface of the frame 92. The main frame 92a has a fixture 95 on a side frame along the longitudinal direction. The globe 93 is formed in a rectangular box shape whose upper surface is opened with a synthetic resin material having translucency such as acrylic, and is attached to the lower surface side of the frame 92 via the fixture 95. The globe 93 has a diffusion structure that diffuses the light emitted from the illumination device 2. The diffusion structure is realized by, for example, a white coating film formed on the surface of the globe 93, a diffusion material mixed in the synthetic tree material forming the globe 93, or unevenness formed on the surface of the globe 93. Is done. As described above, since the diffusing structure is provided in the globe 93, the uniformity of the light irradiated to the illumination space can be further improved.

  A cover 91 is screwed to the upper surface of the case 3. The cover 91 is formed in a rectangular box shape with an open bottom surface, and has an opening 911 for exposing the recess 311 on the top surface.

  The lighting fixture 1 is a ceiling-mounted lighting fixture (so-called ceiling light). However, the lighting fixture 1 is not limited to a ceiling light, and may be a hanging type (so-called pendant type) lighting fixture, an embedded type lighting fixture (so-called downlight), or the like.

(4) Modified Examples Below, several modified examples are listed. Hereinafter, the above-described embodiment is referred to as a “basic example”.

  In the basic example, the filter circuit 440a is provided in front of the step-down chopper block 440b. However, the filter circuit 440a is not an essential component in the power supply device 42 and may be omitted. However, in order to suppress the switching noise from leaking to the first electric wire L11, it is preferable that the filter circuit 440a is provided.

  When the filter circuit 440a is not provided, the capacitor C1 alone of the first conversion circuit 43c can supply the control power supply circuit CP1 with energy for continuing the operation of the second control circuit 44b for a predetermined time or more in the event of a power failure. It preferably has a capacitance.

  In the basic example, the second electric wire L12 is connected to a connection point between the inrush current prevention circuit 43e and the input end of the first conversion circuit 43c. However, the position to which the second electric wire L12 is connected is not particularly limited as long as the second control circuit 44b can monitor the electric power including the AC component before being converted into the DC voltage Vdc by the first conversion circuit 43c.

(5) Advantages As described above, the power supply device 42 according to the first aspect includes the first conversion circuit 43c, the first control circuit 43d, the second conversion circuit 44a, the second control circuit 44b, A first substrate 431 and a second substrate 441 are provided. The first conversion circuit 43c converts input AC power into first DC power. The first control circuit 43d controls the first conversion circuit 43c. The second conversion circuit 44a converts the first DC power into second DC power having a voltage level different from the voltage level of the first DC power, and supplies the second DC power to the load (LED elements 52, 53). The second control circuit 44b controls the second conversion circuit 44a. A plurality of first circuit components 432 constituting the first conversion circuit 43c and the first control circuit 43d are mounted on the first substrate 431. A plurality of second circuit components 442 constituting the second conversion circuit 44a and the second control circuit 44b are mounted on the second substrate 441. The output terminals (T1, T2) of the first conversion circuit 43c and the input terminals (T3, T4) of the second conversion circuit 44a are electrically connected to each other. The first control circuit 43d is electrically connected to the second control circuit 44b, and controls the first conversion circuit 43c by being supplied with power from the second control circuit 44b. The second control circuit 44b is configured to monitor the input AC power. The second control circuit 44b is configured to supply power to the first control circuit 43d only when AC power is input to the first conversion circuit 43c. According to the 1st aspect, the freedom degree of arrangement | positioning can be raised, maintaining the reliability of operation | movement.

  Regarding the power supply device 42 according to the second aspect, in the first aspect, the second control circuit 44b determines that the AC power is input to the first conversion circuit 43c because the AC voltage periodically zero-crosses. It is preferable to do. According to the 2nd aspect, it can determine more correctly that alternating current power is input into the 1st conversion circuit 43c.

  Regarding the power supply device 42 according to the third aspect, in the first or second aspect, it is preferable that the second conversion circuit 44a has a filter circuit 440a for attenuating harmonic components as a pre-stage circuit. According to the 3rd aspect, the leakage of the switching noise which generate | occur | produces in the 1st conversion circuit 43c or the 2nd conversion circuit 44a can be suppressed.

  Regarding the power supply device 42 according to the fourth aspect, in the third aspect, the filter circuit 440a is at least twice the frequency of the AC voltage and the minimum oscillation frequency of the first conversion circuit 43c or the second conversion circuit 44a. It is preferable to have a cutoff frequency that is less than or equal to the value. According to the 4th aspect, the leakage of switching noise can be suppressed more effectively.

  With respect to the power supply device 42 according to the fifth aspect, in any one of the first to fourth aspects, the second control circuit 44b takes the first DC power input from the input terminals (T3, T4) from the first DC power. It is preferable to have a control power supply circuit CP1 that generates control power for supplying power to the control circuit 43d. The first conversion circuit 43c preferably includes a capacitor C1 connected between the pair of output terminals (T1, T2). The capacitor C1 has a capacitance capable of supplying the control power supply circuit CP1 with energy for continuing the operation of the second control circuit 44b for a predetermined time or longer when the input of AC power to the first conversion circuit 43c is stopped. It is preferable. According to the fifth aspect, for example, at the time of a power failure, the second control circuit 44b can quickly stop the first conversion circuit 43c and the second conversion circuit 44a to suppress power consumption (consumption of the control voltage Vcc). be able to. For example, when the wall switch (switch SW0) is temporarily turned off during the one-two operation, the second control circuit 44b can continue the operation for a predetermined time at least.

  Regarding the power supply device 42 according to the sixth aspect, in the third or fourth aspect, the second control circuit 44b controls the power supplied from the first DC power that has passed through the filter circuit 440a to the first control circuit 43d. It is preferable to have a control power supply circuit CP1 that generates The first conversion circuit 43c preferably includes a first capacitor (capacitor C1) connected between the pair of output terminals (T1, T2). The filter circuit 440a preferably includes at least a second capacitor (capacitor C2). The total capacitance of the capacitor C1 and the capacitor C2 is such that when the AC power input to the first conversion circuit 43c is stopped, the energy for continuing the operation of the second control circuit 44b for a predetermined time or more is supplied to the control power supply circuit CP1 A capacitance that can be supplied is preferred. According to the sixth aspect, for example, at the time of a power failure, the second control circuit 44b can quickly stop the first conversion circuit 43c and the second conversion circuit 44a to suppress power consumption (consumption of the control voltage Vcc). be able to. For example, when the wall switch (switch SW0) is temporarily turned off during the one-two operation, the second control circuit 44b can continue the operation for a predetermined time at least.

  In any one of the first to sixth aspects, the power supply device 42 according to the seventh aspect preferably further includes a first electric wire L11, a second electric wire L12, and a third electric wire L13. The output ends (T1, T2) of the first conversion circuit 43c and the input ends (T3, T4) of the second conversion circuit 44a are preferably electrically connected to each other via the first electric wire L11. The second control circuit 44b preferably monitors the AC power via the second electric wire L12. The second control circuit 44b preferably supplies power to the first control circuit 43d via the third electric wire L13. According to the seventh aspect, for example, the degree of freedom in the distance between the first substrate 431 and the second substrate 441 is increased as compared with the case where the first substrate 431 and the second substrate 441 are directly connected by an inter-board connector. Can do.

  The illuminating device 2 which concerns on an 8th aspect is provided with the power supply device 42 in any one of the 1st-7th aspect, and the solid light source (LED element 52, 53) as load. According to the 8th aspect, the illuminating device 2 provided with the power supply device 42 which can raise the freedom degree of arrangement | positioning can be provided, maintaining the reliability of operation | movement.

  In the control method according to the ninth aspect, the first conversion circuit 43c in which the circuit component (first circuit component 432) is mounted on the first substrate 431 converts the input AC power into the first DC power. Is provided. In addition, the control method uses a second conversion circuit 44a in which a circuit component (second circuit component 442) is mounted on the second substrate 441 to convert the first DC power to a first voltage level different from the voltage level of the first DC power. Converting to 2 direct current power and supplying it to a load (LED elements 52 and 53). Further, the control method is to monitor the AC power input to the first conversion circuit 43c, and to control the first conversion circuit 43c only when the AC power is input to the first conversion circuit 43c (first circuit). 1 control circuit 43d). According to the 9th aspect, the freedom degree of arrangement | positioning can be raised, maintaining the reliability of operation | movement.

2 lighting device 42 power supply device 43c first conversion circuit 43d first control circuit 431 first substrate 432 first circuit component 44a second conversion circuit 44b second control circuit 441 second substrate 442 second circuit component 440a filter circuit 52, 53 LED element (load)
T1, T2 output terminal T3, T4 input terminal CP1 control power supply circuit C1 capacitor (first capacitor)
C2 capacitor (second capacitor)
L11 1st electric wire L12 2nd electric wire L13 3rd electric wire

Claims (9)

A first conversion circuit that converts input AC power into first DC power;
A first control circuit for controlling the first conversion circuit;
A second conversion circuit that converts the first DC power into a second DC power having a voltage level different from the voltage level of the first DC power and supplies the second DC power to a load;
A second control circuit for controlling the second conversion circuit;
A first substrate on which a plurality of first circuit components constituting the first conversion circuit and the first control circuit are mounted;
A second substrate on which a plurality of second circuit components constituting the second conversion circuit and the second control circuit are mounted;
With
The output terminal of the first conversion circuit and the input terminal of the second conversion circuit are electrically connected to each other,
The first control circuit is electrically connected to the second control circuit and controls the first conversion circuit by being supplied with power from the second control circuit;
The second control circuit is configured to monitor the input AC power;
The power supply device, wherein the second control circuit is configured to supply power to the first control circuit only when the AC power is input to the first conversion circuit. The power supply device according to claim 1, wherein the second control circuit determines that the AC power is input to the first conversion circuit when an AC voltage periodically zero-crosses. The power supply apparatus according to claim 1, wherein the second conversion circuit includes a filter circuit that attenuates harmonic components as a pre-stage circuit. The filter circuit has a cutoff frequency that is not less than twice the frequency of the AC voltage and not more than the minimum value of the oscillation frequency of the first conversion circuit or the second conversion circuit. The power supply device according to claim 3. The second control circuit has a control power supply circuit that generates control power for supplying power to the first control circuit from the first DC power input to the input terminal,
The first conversion circuit has a capacitor connected between a pair of the output terminals,
The capacitor has a capacitance capable of supplying the control power supply circuit with energy for continuing the operation of the second control circuit for a predetermined time or longer when the input of the AC power to the first conversion circuit is stopped. It has. The power supply device of any one of Claims 1-4 characterized by the above-mentioned. The second control circuit includes a control power supply circuit that generates control power for supplying power to the first control circuit from the first DC power that has passed through the filter circuit.
The first conversion circuit has a first capacitor connected between the pair of output terminals,
The filter circuit has at least a second capacitor,
The total capacitance of the first capacitor and the second capacitor is energy for continuing the operation of the second control circuit for a predetermined time or longer when the input of the AC power to the first conversion circuit is stopped. The power supply device according to claim 3, wherein the power supply device is a capacitance that can be supplied to the control power supply circuit. A first electric wire, a second electric wire, and a third electric wire;
The output end of the first conversion circuit and the input end of the second conversion circuit are electrically connected to each other via the first electric wire,
The second control circuit monitors the AC power via the second electric wire,
The power supply apparatus according to claim 1, wherein the second control circuit supplies power to the first control circuit via the third electric wire. An illumination device comprising: the power supply device according to claim 1; and a solid light source as the load. Converting the input AC power into the first DC power by the first conversion circuit having circuit components mounted on the first substrate;
Converting the first DC power into second DC power having a voltage level different from the voltage level of the first DC power by a second conversion circuit having circuit components mounted on the second substrate, and supplying the second DC power to a load;
Monitoring the AC power input to the first conversion circuit;
Supplying power to a control circuit that controls the first conversion circuit only when the AC power is input to the first conversion circuit;
A control method comprising:

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