CN107371293A - Supply unit and lighting device - Google Patents
Supply unit and lighting device Download PDFInfo
- Publication number
- CN107371293A CN107371293A CN201710288553.5A CN201710288553A CN107371293A CN 107371293 A CN107371293 A CN 107371293A CN 201710288553 A CN201710288553 A CN 201710288553A CN 107371293 A CN107371293 A CN 107371293A
- Authority
- CN
- China
- Prior art keywords
- supply unit
- voltage
- terminal
- thyristor
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
Abstract
The present invention provides a kind of supply unit and lighting device.Purpose is to reduce the noise being superimposed upon on detection voltage.Drive voltage supply unit (214) includes the series circuit with bootstrap diode (D2), boottrap capacitor (C2) and the current limiting element (resistor R4) electrically connected in a series arrangement.Drive voltage supply unit (214) has the first terminal that the lead-out terminal with the hot side of control power supply unit (22) electrically connects.Drive voltage supply unit (214) has the Second terminal electrically connected with the tie point of thyristor (Q1) and the negative electrode of fly-wheel diode (D1).Flow direction of the bootstrap diode (D2) along electric current from (drive voltage supply unit (214)) the first terminal to Second terminal is set.
Description
Technical field
The present invention relates to a kind of supply unit and lighting device, and it is particularly used for carrying out the power supply dress of electrical power conversion
Put and the lighting device including the supply unit and light source.
Background technology
For example, document 1 (JP2015-118734A) describes the LED photographs as the supply unit for carrying out electrical power conversion
Bright device.LED light device (hereinafter referred to as conventional example) described in document 1 includes buck chopper, control block and straight
Flow (DC) power supply.D/C power includes wave filter, rectification circuit, PFC (PFC) unit and smoothing capacity device.Pay attention to,
Buck chopper is configured as including the semiconductor switch for being connected to the side that current potential is higher compared with the side for connecting inductor
The so-called hot side buck chopper of element.Control block is included as the control IC of high-withstand-voltage integrated circuit, installed in outer
The circuit element and control power supply maker in portion.Control IC include buck controller, high-order side driver, pfc controller and
Light modulator etc..Pfc controller carries out the feedback control of the dutycycle of the thyristor to PFC units, make it that DC is electric
The output voltage in source is predetermined fixed voltage.
Thus high-order side driver drives decompression to cut using the voltage for being mounted externally to control IC boostrap circuit to supply
The thyristor of ripple device.Boostrap circuit includes bootstrap diode and boottrap capacitor.Bootstrap diode has and control
The anode of the lead-out terminal electrical connection of the hot side of power supply maker.Boottrap capacitor has and the negative electrode of bootstrap diode electricity
The first terminal of connection.Boottrap capacitor has the Second terminal electrically connected with high-order side driver.That is, boostrap circuit
Boottrap capacitor is charged using the control supply voltage from control power supply maker supply, and by boottrap capacitor
Charging voltage is added with control supply voltage, thus generates the DC voltage higher than control supply voltage.Light modulator will be from outside
The dim signal (pwm signal with the rectangular wave of fixed time period) of input is converted into DC voltage.
Buck controller includes being used for the timer and/or comparator for counting fixed time period, and in timing
The control signal that will be exported to high-order side driver in the period that device is counted is increased to high level.Raised in control signal
To high level, high-order side driver connects the thyristor of buck chopper.In addition, with flowing through LED
In the case that the detection voltage of the current in proportion of load exceedes the threshold voltage corresponding with dim signal, buck controller will
Control signal is reduced to low level.Control signal drop to it is low level in the case of, high-order side driver disconnects buck chopper
The thyristor of device.
The conventional example can dim according to the dim signal from outside input to LED light source.
However, in the conventional example, the thyristor of buck chopper is being connected from high-order side driver
For time point in the short time period of reverse recovery time section that have passed through bootstrap diode, high current may flow through boostrap circuit.Cause
This, in the conventional example, the influence of the electric current due to reversely flowing through boostrap circuit as described above, causes on detection voltage
Possible superimposed noise.
The content of the invention
Problems to be solved by the invention
It is an object of the invention to provide supply unit and the illumination for making it possible to reduce the noise being superimposed upon on detection voltage
Device.
The solution used to solve the problem
Supply unit according to an aspect of the present invention, including：Electric power converter；Controller, it is configured as controlling
The electric power converter；And control power supply unit, it is configured as supplying control power supply, the electrical power conversion to the controller
Device includes：The thyristor and the series circuit of fly-wheel diode electrically connected in a series arrangement, inductor, its have with
The first terminal of the tie point electrical connection of the negative electrode of the thyristor and the fly-wheel diode, output capacitor,
It has the first terminal that electrically connect with the Second terminal of the inductor, and current detector, its be configured as output and
The detection voltage of the current in proportion of the anode of the fly-wheel diode is flowed to from the Second terminal of the output capacitor, it is described
Control power supply unit generates control supply voltage according to input to the input voltage of the electric power converter, and to the control
The control supply voltage that device supply is generated, the controller include：Driver, it is configured as opening to the semiconductor
The control terminal for closing element applies driving voltage, and to connect the thyristor, comparator, it is configured as will be described
Detect voltage with threshold voltage compared with, and it is described detect voltage reach the threshold voltage in the case of or
The detection voltage exports trigger signal in the case of exceeding the threshold voltage, and adjustment unit, it is configured as according to outside
Indicate that switch controller, it is configured as connecting the driver in the switch controller to adjust the threshold voltage
In the case of receiving the trigger signal from the comparator after the thyristor, make the driver
The thyristor, and drive voltage supply unit are disconnected, it, which is configured as supplying to the driver, connects institute
The driving voltage needed for thyristor is stated, wherein, the drive voltage supply unit includes electrically connecting in a series arrangement
Bootstrap diode, the series circuit of boottrap capacitor and current limiting element, the drive voltage supply unit has and the control
The first terminal of the lead-out terminal electrical connection of the hot side of power supply unit processed, the drive voltage supply unit have and described half
The Second terminal of the tie point electrical connection of the negative electrode of conductor switch element and the fly-wheel diode, bootstrap diode edge electricity
Flow the flow direction of the Second terminal from the first terminal of the drive voltage supply unit to the drive voltage supply unit
Set.
Lighting device according to aspects of the present invention includes supply unit and utilizes the DC electric power from supply unit supply
Come the light source connected.
The effect of invention
The supply unit and lighting device of the present invention makes it possible to reduce the noise being superimposed upon on detection voltage.
Brief description of the drawings
Fig. 1 is the circuit diagram for showing supply unit according to an embodiment of the invention；
Fig. 2 is the timing diagram for the operation for showing supply unit；
Fig. 3 is the performance plot for the operation for showing supply unit；
Fig. 4 is the exploded perspective for showing the ligthing paraphernalia including lighting device (light source cell) according to embodiments of the present invention
Figure；And
Fig. 5 is the stereogram for showing ligthing paraphernalia.
Description of reference numerals
2 supply units
3 light source cells (lighting device)
5 integrated circuits
20 electric power converters
21 controllers
22 control power supply units
210 drivers
211 comparators
212 adjustment units
213 switch controllers
214 drive voltage supply units
215 low pass filters
Q1 thyristors
D1 fly-wheel diodes
L1 inductors
C1 output capacitors
R2 resistors (current detector)
D2 bootstrap diodes
C2 boottrap capacitors
R4 resistors (current limiting element)
Vcc controls supply voltage
Vs detects voltage
Vth threshold voltages
Embodiment
Describe supply unit and lighting device according to embodiments of the present invention in detail below with reference to accompanying drawing.Pay attention to, with
Structure described in lower embodiment is only the example of the present invention.The invention is not restricted to following examples.Can be according to design etc.
To carry out various modifications, as long as providing the effect of the present invention.
As shown in figure 1, the supply unit 2 of the present embodiment includes electric power converter 20, for controlling electric power converter 20
Controller 21 and the control power supply unit 22 for supplying control power supply to controller 21.Preferably, supply unit 2 is further
Including filter circuit 10, rectifier 11, power factor correction circuit 12, smoothing capacity device 13, a pair of input terminals 23 and one
To lead-out terminal 24.
A pair of input terminals 23 is each electrically connected to the external power source 6 of the AC power as commercialization.For example, wave filter is electric
Road 10 reduces the harmonic noise leaked from a pair of input terminals 23 to external power source 6.Rectifier 11 is diode bridge, and is carried out pair
The full-wave rectification of exchange (AC) voltage inputted via filter circuit 10 from a pair of input terminals 23.Power factor correction circuit
12 be the boost chopper of non-insulated type.Power factor correction circuit 12 makes to be increased to from the pulse voltage that rectifier 11 exports
DC voltage with the high magnitude of voltage of the peak value than pulse voltage, thus corrected power factor.Smoothing capacity device 13 is formed
For electrolytic condenser.Included ripple in the output voltage of the reduction power factor correction circuit 12 of smoothing capacity device 13.
Power supply unit 22 is controlled to reduce the voltage at the both ends of smoothing capacity device 13, thus generation control power supply (control supply voltage
Vcc).Pay attention to, in power supply unit 22 is controlled, until the output electricity of power factor correction circuit 12 after external power source 6 is connected
During pressing the stable period, the pulse voltage exported from rectifier 11 reduces the direct current that smoothing capacity device 13 is smoothed
Pressure, thus generation control power supply.
Electric power converter 20 is buck chopper circuit.The direct current that electric power converter 20 is smoothed smoothing capacity device 13
Voltage (for example, 400 [V] DC voltage) reduces (to be described later on into equal to the load electrically connected with a pair of output 24
LED module 30) rated voltage (for example, 290 [V]) voltage.Electric power converter 20 includes thyristor (hereinafter referred to as
For switch element Q1), sustained diode 1, inductor L1, output capacitor C1 and current detector.Switch element Q1 is n ditches
Road emos (MOSFET).Switch element Q1 has the height with smoothing capacity device 13
The drain electrode of current potential side terminal electrical connection.Switch element Q1 has the source terminal electrically connected with the negative electrode of sustained diode 1.It is continuous
Stream diode D1 has the anode electrically connected with the low potential side terminal of smoothing capacity device 13.Inductor L1 has and the pole of afterflow two
The first terminal of pipe D1 negative electrode electrical connection.Inductor L1 is defeated with the first terminal and side of the positive electrode with output capacitor C1
Go out the Second terminal of the electrical connection of terminal 24.Output capacitor C1 has the second end electrically connected with the lead-out terminal 24 of negative side
Son.Current detector is resistor R2.Resistor R2 has and output capacitor C1 Second terminal and the output end of negative side
The first terminal of the electrical connection of son 24.Resistor R2 has the Second terminal electrically connected with the anode of sustained diode 1.Switching
When element Q1 connects (conduction), including resistor R2 current detector exports and flows through inductor L1's and output capacitor C1
The detection voltage Vs of current in proportion.Pay attention to, the resistor R3 for discharging electric charge charged in output capacitor C1 is preferred
It is connected between inductor L1 Second terminal and the anode of sustained diode 1.
The resistor and capacitor, driving voltage that controller 21 includes integrated circuit 5, is mounted externally to integrated circuit 5
Feed unit 214 and low pass filter 215 etc..Integrated circuit 5 include driver 210, comparator 211, adjustment unit 212,
Switch controller 213, main control circuit 216, PFC drivers 217 and determining device 218 etc..Preferably, integrated circuit 5 also includes
The switch element Q1 of electric power converter 20.
Driver 210 applies driving voltage via resistor R6 to switch element Q1 control terminal (gate terminal), by
This ON switch element Q1.Pay attention to, resistor R6 is electrically connected with diode D3 and resistor R7 series circuit with parallel way.
In the case of no longer from the application driving voltage of driver 210, the series circuit discharges the electricity of the grid from switch element Q1
Lotus, thus quick break switch element Q1.
Comparator 211 will be inputted to the detection voltage Vs of the reversed input terminal (negative terminal) of comparator 211 and input
Threshold voltage vt h to the non-inverting input terminal (positive terminal) of comparator 211 is compared.It is less than threshold in detection voltage Vs
In the case of threshold voltage Vth, comparator 211, which is output it, is arranged to high level.It is more than or equal to threshold value electricity in detection voltage Vs
In the case of pressing Vth, comparator 211, which is output it, is arranged to low level, and exports trigger signal (electricity to switch controller 213
Pressure signal is in low level).
Adjustment unit 212 according to for example come the instruction of dimmer 7 come adjusting threshold voltage Vth.The output of light modulator 7 has
The dim signal (pulse width modulating signal) of the dimming level associated with dutycycle.Pay attention to, dimming level passes through following hundred
Ratio is divided to represent：Light quantity when rated electrical is supplied from from electric power converter 20 to LED module 30 is 100%.Adjustment unit 212 is wrapped
Include signal adapter 2120, operational amplifier 2121 and two voltage grading resistors R10 and R11.
The dim signal inputted from light modulator 7 is converted into DC voltage by signal adapter 2120, after being changed
DC voltage (hereinafter referred to as dims output voltage), and will dim output voltage export it is noninverting defeated to operational amplifier 2121
Enter terminal.Operational amplifier 2121 has reversed input terminal and non-inverting input terminal, wherein capacitor C13 and feedback electricity
Resistance device R12 and capacitor C12 series circuit is electrically connected to the non-inverting input terminal with parallel way.Operational amplifier 2121
To inputting to the light modulation output voltage of non-inverting input terminal and inputting to the inspection of reversed input terminal from signal adapter 2120
The difference surveyed between voltage Vs is amplified, with the difference after amplify, and by this amplify after poor export to voltage grading resistor R10
With R11 series circuit.Voltage grading resistor R10 and R11 series circuit have to be connected with the lead-out terminal of operational amplifier 2121
The one end connect and the other end electrically connected with the earth polar (anode of smoothing capacity device 13) of circuit.Then, partial pressure electricity will be passed through
The voltage that resistance device R10 and R11 obtained after partial pressure is inputted to the non-inverting input of comparator 211 as threshold voltage vt h
Terminal.That is, adjustment unit 212 with the increase (with the increase of light quantity) of the dimming level indicated by light modulator 7 and
Increase threshold voltage vt h.Control signal is increased to high level by switch controller 213 in fixed time period, so that driving
The dynamic ON switch element Q1 of device 210.In addition, receive the situation of the trigger signal from comparator 211 in switch controller 213
Under, control signal is reduced to low level by switch controller 213, driver 210 is disconnected switch element Q1.
By the peak value of the pulse voltage exported from rectifier 11 compared with lower limit, thus judgement is determining device 218
It is no to have supplied AC voltages from external power source 6.In the case where the peak value of pulse voltage exceedes lower limit, determining device 218 is judged as
AC voltages have been supplied, have thus judged signal output to main control circuit 216 high level.On the other hand, at the peak of pulse voltage
In the case that value is less than lower limit, determining device 218 is judged as not supplying AC voltages, thus judges signal output to master low level
Control circuit 216.Pay attention to, lower limit is preferably configured to 80 [%'s] of the peak value under the normal condition as pulse voltage
Value.For example, in the case where having supplied the AC voltages with virtual value 100 [V] from external power source 6, lower limit is AC voltages
80 [%] of peak value (about 141 [V]), thus be about 113 [V].
Main control circuit 216 from low level from the judgement signal of determining device 218 to being increased to high-tension time point (hereinafter referred to as
For " connection time point ") start elapsed time counted.When reaching the operation time started in elapsed time, main control
Circuit 216 operates commencing signal to PFC drivers 217 and the output of switch controller 213.Receive to come in switch controller 213
During the operation commencing signal of autonomous control circuit 216, switch controller 213 raises control signal in fixed time period paramount
Level.When PFC drivers 217 receive the operation commencing signal from main control circuit 216, PFC drivers 217 make power
Factor correction circuit 12 is operated.Paying attention to, PFC drivers 217 carry out the feedback control to power factor correction circuit 12, with
So that the voltage at the both ends of smoothing capacity device 13 is fixed voltage.
In addition, determining device 218 judgement signal from high level drop to it is low level in the case of, main control circuit 216
Operation stop signal is exported to PFC drivers 217 and switch controller 213.Received in switch controller 213 from master control
During the operation stop signal of circuit 216 processed, control signal is maintained low level by switch controller 213.In PFC drivers 217
When receiving the operation stop signal from control circuit 216, PFC drivers 217 stop power factor correction circuit 12.Note
Meaning, if controlling power supply unit 22 to be no longer able to supply control power supply supply after the power supply of external power source 6 stopped
Voltage vcc, then supply unit 2 stop completely.
Low pass filter 215 is the integrated circuit for including capacitor C3 and resistor R5.Resistor R5 has and low potential
The first terminal that the lead-out terminal 24 of side electrically connects, and there is resistor R5 the reversed input terminal with comparator 211 to be electrically connected
The Second terminal connect.Capacitor C3 has first electrically connected with resistor R2 Second terminal and the anode of sustained diode 1
Terminal.Capacitor C3 has the second end electrically connected with resistor R5 Second terminal and the reversed input terminal of comparator 211
Son.That is, low pass filter 215 reduces the harmonic noise that be superimposed upon on detection voltage Vs.
Drive voltage supply unit 214 supplies the driving voltage needed for ON switch element Q1 to driver 210.Driving electricity
Pressure feed unit 214 includes series circuit.The series circuit includes bootstrapping (bootstrap) diode D2, boottrap capacitor C2
With current limiting element (resistor R4).Bootstrap diode D2 has the negative electrode electrically connected with boottrap capacitor C2 the first terminal.From
Lifting capacitor C2 has the Second terminal electrically connected with resistor R4 the first terminal.Resistor R4 Second terminal is (in other words
Say, the Second terminal of drive voltage supply unit 214) with switch element Q1 source terminal and the negative electrode of sustained diode 1
Tie point electrically connects.Bootstrap diode D2 anode (in other words, the first terminal of drive voltage supply unit 214) and control
The lead-out terminal electrical connection of the hot side of power supply unit 22.Drive voltage supply unit 214 exports using from control power supply unit 22
Control power supply service voltage Vcc boottrap capacitor C2 is charged via bootstrap diode D2.Then, driving voltage supplies
Boottrap capacitor C2 charging voltage is added to control power supply service voltage Vcc, the control after then will add up to unit 214
Power supply service voltage Vcc is supplied to driver 210.Pay attention to, the resistor R4 as current limiting element can be only fitted to control power supply
Between the lead-out terminal of the hot side in portion 22 and bootstrap diode D2 anode, or configuration is in bootstrap diode D2 negative electrode
Between boottrap capacitor C2 the first terminal.In addition, drive voltage supply unit 214 can be configured as including except bootstrapping
Circuit element beyond diode D2, boottrap capacitor C2 and resistor R4.
Then, the operation of supply unit 2 will be illustrated.It is electric to supply AC to a pair of input terminals 23 connecting external power source 6
In the case of pressure, the control generation control power supply of power supply unit 22, and control power supply is supplied to controller 21.When from power on
When point beginning elapsed time reaches the operation time started, main control circuit 216 will operate commencing signal and export to PFC drivings
Device 217, then, main control circuit 216 also export operation commencing signal to switch controller 213.Receive operation and start letter
Number PFC drivers 217 cause power factor correction circuit 12 be operated.In the output voltage of power factor correction circuit 12
After stable, the switch controller 213 for receiving operation commencing signal exports control signal to driver 210, so that electric power
Converter 20 is operated.Then, due to the operation of electric power converter 20 so that from a pair of output 24 to as load
LED module 30 supplies DC electric power, thus lights LED module 30.
Here, it will be explained in operation during 210 ON switch element Q1 of driver.In the control of switch controller 213
When signal is increased to high level, driver 210 applies from drive voltage supply unit 214 to switch element Q1 gate terminal to be supplied
The driving voltage given, thereby turn on switch element Q1.When switch element Q1 is connected, electric current is from smoothing capacity device 13 via switch
Element Q1 and flow to inductor L1.Now, before the reverse recovery time section by bootstrap diode D2, via switch element
Q1 electric current may flow to drive voltage supply unit 214 without flowing to inductor L1.In supply unit 2, via opening
In the case that pass element Q1 electric current flows through drive voltage supply unit 214, in the reversed input terminal of input to comparator 211
Detection voltage Vs on may superimposed noise.Especially, it is the situation of low (light modulation is deep) in the dimming level indicated from light modulator 7
Under, threshold voltage vt h is adjusted to low value, therefore compared with dimming level is the situation of high (light modulation is shallow), the influence of noise
It is probably significant.
However, the drive voltage supply unit 214 of supply unit 2 includes the resistor R4 as current limiting element.Thus,
In supply unit 2, resistor R4 makes it possible to the limitation flow direction driving electricity during bootstrap diode D2 reverse recovery time section
Press the electric current of feed unit 214.As a result, supply unit 2 makes it possible to reduce the noise being superimposed upon on detection voltage Vs.
Here, supply unit 2 preferably carries out so-called soft start, wherein, it is outer connecting in the case where light source is load
When portion's power supply 6 and/or instantaneous voltage decline generation, load current gradually increases to desired value, to improve comfortableness.Pay attention to, wink
When voltage decline be from external power source 6 supply AC power supplies within the time less than one second moment decline phenomenon.
Then, with reference to the timing diagram of figure 2, the operation of the soft start of supply unit 2 will be illustrated.When transverse axis in Fig. 2 represents
Between t.In addition, six waveforms in Fig. 2 are the judgement letter for controlling power supply service voltage Vcc, determining device 218 successively from the top down
Number, the driving voltage of the mode of operation of power factor correction circuit 12, threshold voltage vt h, driver 210 and flow through LED moulds
The load current of block 30.Pay attention to, the timing diagram shown in Fig. 2 represents what the AC voltages of external power source 6 declined there occurs instantaneous voltage
Situation.
Low level (time t=is dropped in the AC voltages reduction of external power source 6 thus the judgement signal of determining device 218
When t1), main control circuit 216 exports operation stop signal to PFC drivers 217 and switch controller 213.In switch controller
213 when receiving the operation stop signal from main control circuit 216, and control signal is arranged to low electricity by switch controller 213
Flat (time t=t2).When PFC drivers 217 receive the operation stop signal from control circuit 216, PFC drivers
217 make power factor correction circuit 12 stop (time t=t2).
Then, the AC voltages of external power source 6 are extensive during control power supply unit 22 continues supply control power supply service voltage Vcc
When multiple, the judgement signal of determining device 218 is increased to high level (time t=t3) from low level.From judge signal rise it is paramount
When time point (connection time point) the beginning elapsed time of level reaches operation time started (time t=t4), main control circuit
216 each export operation commencing signal to PFC drivers 217 and switch controller 213.Then, operation commencing signal is received
PFC drivers 217 be operated power factor correction circuit 12.Exported in main control circuit 216 to PFC drivers 217
It has passed through the time point (time t=t5) of predetermined waiting period after operation commencing signal, main control circuit 216 is to regulation
(signal adapter 2120) output soft start commencing signal of unit 212.Since signal adapter 2120 receives soft start
For the time point (time t=t4) of signal untill the time point that have passed through the scheduled time, signal adapter 2120 ties up threshold voltage vt h
Hold 0, and have passed through the time point (time t=t5) of the scheduled time, threshold voltage vt h is arranged to by signal adapter 2120
First value Vth1.In the case where threshold voltage vt h is 0, the output from comparator 211 is converted into high level, and does not have
Trigger signal (low level output signal) is exported to switch controller 213.In addition, only in predetermined duration section, letter
Threshold voltage vt h is maintained the first value Vth1 by number converter 2120, and then (time t=t6), signal adapter 2120 makes threshold
Threshold voltage Vth gradually increases from the first value Vth1 to second value Vth2.Pay attention to, second value Vth2 be with time point (time t=
T6) from the corresponding value of the dim signal of the input of light modulator 7.
Switch controller 213 receives the operation commencing signal from main control circuit 216, but from time t=t4 to
During time t=t5 period, comparator 211 is without output trigger signal, therefore switch controller 213 is not to driver
210 output control signals.Because switch controller 213 is not to the output control signal of driver 210, therefore electric power converter 20
Without work, and no load current flows through.However, during from time t=t5 to time t=t6 period, than
Trigger signal is exported to switch controller 213 compared with device 211, therefore switch controller 213 is to the output control signal of driver 210.
Thus, electric power converter 20 is operated, and load current flows through.Pay attention to, the time in time t=t5 to time t=t6
The load current flowed through during section is very small amount of.After time t=t6, the further control driving of switch controller 213
Device 210, make it that the period (on-time) that switch element Q1 is connected gradually extends as threshold voltage vt h increases.
This load current for making to supply to LED module 30 from electric power converter 20 gradually increases.As a result, supply unit 2 carries out soft start,
Thus the light quantity of LED module 30 is made gradually to increase, this makes it possible to the comfortableness for improving lighting environment.
However, deterioration year in year out may make engagement LED 300 negative pole or the solder crack of positive pole, this may increase LED moulds
The apparent impedance of block 30.In this case, it is intended to current value is filled equal to the electric current of the current value under normal condition from power supply
Put 2 and flow to LED module 30 and increase the output voltage of supply unit 2, and also increase the input electric power of supply unit 2.This
Circuit element (switch element Q1, the power factor correction circuit of electric power converter 20 included in supply unit 2 may be caused
12 switch element etc.) caloric value increase, the shortcomings that so as to cause lost of life of supply unit 2 etc..
In order to reduce the generation of the shortcomings that as described above, the opening for electric power converter 20 of controller 21 of supply unit 2
The dutycycle for closing element Q1 PWM controls sets higher limit.Fig. 3 solid line α shows the input electric power and output electricity of supply unit 2
Relation between pressure, and the dotted line β in Fig. 3 shows the relation between dutycycle and output voltage.In the specified of supply unit 2
In the case that output voltage is 290 [V], if LED module 30 is in normal condition, controller 21 is signified according to light modulator 7
The dimming level shown makes the switch element Q1 dutycycle change in the range of 28 [%]~43 [%] (referring to dotted line β).This
When, the output voltage of supply unit 2 changes in the range of about 220 [V]~290 [V], and input electric power 22.5 [W]~
Change is (referring to solid line α) in the range of 28.9 [W].
Supplied because the impedance of LED module 30 increases because deteriorating year in year out, therefore from supply unit 2 to LED module 30
Electric power increases.In this case, when the value that controller 21 attempts to make to flow to switch element Q1 electric current is equal to target etc., account for
Sky thereby increases the output voltage of supply unit 2 than increasing.In the case that even if the deterioration year in year out of LED module 30 continues, control
Device 21 processed also continues to control untill dutycycle reaches higher limit switch element Q1 PWM.Will however, controller 21 is no
Dutycycle increases into more than higher limit (for example, 45 [%]), so if impedance further increases, then load current most stops at last
Fluid stopping, LED module 30 is thereby turned off, and input electric power is reduced into approximate 0 (referring to solid line α).
As described above, by controller 21 for for carrying out the PWM controls to the switch element Q1 of electric power converter 20
Dutycycle the shortcomings that setting higher limit to make it possible to reduce lost of life etc. of supply unit 2 generation.Pay attention to, duty
The higher limit of ratio is not limited to 45 [%], and is preferably provided in the range of 40 [%]~50 [%].
The supply unit (2) of first aspect includes：Electric power converter (20)；Controller (21), it is configured as controlling institute
State electric power converter (20)；And control power supply unit (22), it is configured as supplying control power supply to the controller (21).Institute
Stating electric power converter (20) includes：The thyristor (Q1) and the string of fly-wheel diode (D1) electrically connected in a series arrangement
Join circuit；And inductor (L1), it has the moon with the thyristor (Q1) and the fly-wheel diode (D1)
The first terminal of the tie point electrical connection of pole.The electric power converter (20) includes：Output capacitor (C1), its have with it is described
The first terminal of the Second terminal electrical connection of inductor (L1)；And current detector (resistor (R2)), it is configured as defeated
Go out to flow to the current in proportion of the anode of the fly-wheel diode (D1) with the Second terminal from the output capacitor (C1)
Detect voltage (Vs).The control power supply unit (22) generates control according to input to the input voltage of the electric power converter (20)
Supply voltage (Vcc) processed, and the control supply voltage (Vcc) generated is supplied to the controller (21).The control
Device (21) processed includes driver (210), comparator (211), switch controller (213) and drive voltage supply unit (214).Drive
Dynamic device (210) is configured as applying driving voltage to the thyristor (Q1) control terminal (gate terminal), with
Connect the thyristor (Q1).Comparator (211) is configured as the detection voltage (Vs) and threshold voltage
(Vth) it is compared, and in the case where the detection voltage (Vs) reaches the threshold voltage (Vth) or described
Detection voltage (Vs) exports trigger signal in the case of exceeding the threshold voltage (Vth).Adjustment unit (212) is configured as root
The threshold voltage (Vth) is adjusted according to the instruction from external device (ED) (dimming unit (7)).Switch controller (213) by with
It is set to and is received after the switch controller (213) makes the driver (210) connect the thyristor (Q1)
In the case of the trigger signal from the comparator (211), the driver (210) is disconnected the semiconductor and open
Close element (Q1).Drive voltage supply unit (214) is configured as opening to the driver (210) the supply connection semiconductor
Close the driving voltage needed for element (Q1).The drive voltage supply unit (214) includes the bootstrapping electrically connected in a series arrangement
The series circuit of diode (D2), boottrap capacitor (C2) and current limiting element (resistor (R4)).The drive voltage supply list
First (214) have the first terminal that the lead-out terminal with the hot side of the control power supply unit (22) electrically connects.The driving
Voltage feed unit (214) has the connection with the thyristor (Q1) and the negative electrode of the fly-wheel diode (D1)
The Second terminal of point electrical connection.The bootstrap diode (D2) along electric current from the drive voltage supply unit (214) first
Terminal is set to the flow direction of the Second terminal of the drive voltage supply unit (214).
Supply unit (2) is flowed by resistor (R4) during being limited in the reverse recovery time section of bootstrap diode (D2)
Electric current through drive voltage supply unit (214), thus reduce the noise being superimposed upon on detection voltage (Vs).
In addition, the supply unit (2) of second aspect can be by being combined to realize with first aspect.Second aspect
Supply unit (2) also includes low pass filter (215).The low pass filter (215) is configured as to from the resistor R2
The detection voltage (Vs) of output is filtered processing, then by detection voltage (Vs) output to the comparator (211).
In supply unit (2), low pass filter (215) is filtered to the harmonic noise being superimposed upon on detection voltage (Vs)
Ripple, thus reduce the noise being superimposed upon on detection voltage (Vs).
In addition, the supply unit (2) of the third aspect can be by being combined to realize with first or second aspect.
In the supply unit (2) of three aspects, the controller (21) and the thyristor (Q1) are formed as being contained in one
Integrated circuit (5) in packaging body.
Supply unit (2) can be minimized by the quantity for the component for reducing supply unit (2).
Then, the lighting device of the present embodiment will be illustrated.The lighting device of the present embodiment is light source cell 3.Lighting device
Ligthing paraphernalia 1 is formed with apparatus body 4.
As shown in figure 4, light source cell 3 includes supply unit 2 and the LED module 30 of two loads for being used as supply unit 2.
Preferably, light source cell 3 also includes installation component 31 and covering member 32.Each LED module 30 includes multiple LED 300, substrate
301st, Relay linker 302 and input connector 303.Substrate 301 is formed as with elongate rectangular tabular.Multiple LED 300 with
At equal intervals, the mode that the line extended along the length direction of substrate 301 aligns is arranged on the surface (lower surface) of substrate 301
Transverse direction on central portion.Repeater 302 is arranged on the end of the substrate 301 of two LED modules 30, and the end is along substrate
301 length direction is adjacent to each other.Input connector 303 is arranged on the end of the substrate 301 of LED module 30, the end and peace
The end for filling Relay linker 302 is relative.
Installation component 31 is made up of metallic plate, and has elongated square channel-shaped.Installation component 31 includes having elongate rectangular
The bottom plate 310 of tabular and a pair of side plates 311 holded up upwards along the length direction of bottom plate 310 since both ends.In two LED
In the state of the Relay linker 302 of module 30 is electrically connected to each other, cutting rising portion that two LED modules 30 pass through bottom plate 310
Multiple pawls for being formed and installed in the lower surface of bottom plate 310.Pay attention to, the input connector 303 of two LED modules 30 is via electricity
The out connector of line and supply unit 2 is electrically connected to each other.
Covering member 32 with acrylic resin or polycarbonate resin etc. of the light through characteristic by synthesizing tree
Fat is made, and with semicircle.In addition, covering member 32 include along covering member 32 length direction it is upward one
To wall 320 of dashing forward.Covering member 32 accommodates installation component 31 between a pair of prominent walls 320, and passes through a pair of installation component 31
The end (upper end) of side plate 311 and catch the hook formed in the end (upper end) of a pair of prominent walls 320, thus by covering member 32
It is attached to installation component 31.
Supply unit 2 includes the printed wiring board for accommodating the various types of electronic building bricks for being mounted with to include integrated circuit 5
26 housing 25.Housing 25 is made up of metallic plate, and with the elongate rectangular box-like being open on a surface.Housing 25 accommodates
The printed wiring board 26 of electronic building brick is mounted with, and housing 25 is fixed to installation component 31 (for example, threadably), its
In, it is open towards the upper surface of bottom plate 310.
Apparatus body 4 includes the housing 40 with the rectangular box that is open on the lower surface, from opening edge genesis along shell
A pair of reflecting plates 41 of the oblique upper process of length direction of body 40 and the length for being separately positioned on housing 40 and a pair of reflecting plates 41
Two end plates 42 of the pairing at the both ends spent on direction.Institute on bottom surface by the way that each hanger bolt of ceiling to be inserted to housing 40
Formed multiple mounting holes 400 at least any two in corresponding mounting hole and nut is tightened on hanger bolt,
Apparatus body 4 is ceiling mounted.In addition, the multiple power supplys formed on bottom surface via the housing 40 of apparatus body 4
Power line is inserted at least one of hole 401.Then, filled via the power line that power hole 401 is inserted via terminal block and power supply
2 a pair of input terminals 23 is put to electrically connect.
Light source cell 3 is attached to apparatus body 4 (housing 40), is mounted so as to the He of a pair of side plates 311 of component 31
The prominent wall 320 of a pair of covering member 32 is contained in housing 40 (referring to Fig. 5).
As described above, the lighting device (light source cell (3)) of fourth aspect includes any according to first~third aspect
The supply unit (2) of aspect and the DC electric power by being supplied from supply unit (2) are come the light source (LED module (30)) lighted.
Lighting device (light source cell (3)) makes it possible to reduce the noise being superimposed upon on detection voltage Vs.
Pay attention to, lighting device is configured such that multiple LED on the surface of the installation component with rectangular plate-like
Module 30 and covering member align on short width.
Claims (4)
1. a kind of supply unit, including：
Electric power converter；
Controller, it is configured as controlling the electric power converter；And
Power supply unit is controlled, it is configured as supplying control power supply to the controller,
The electric power converter includes：
The thyristor and the series circuit of fly-wheel diode electrically connected in a series arrangement,
Inductor, it has the electrically connected with the tie point of the thyristor and the negative electrode of the fly-wheel diode
One terminal,
Output capacitor, it has the first terminal electrically connected with the Second terminal of the inductor, and
Current detector, it is configured as output and flows to the fly-wheel diode with the Second terminal from the output capacitor
The detection voltage of the current in proportion of anode,
The control power supply unit generates control supply voltage according to input to the input voltage of the electric power converter, and to
The control supply voltage that the controller supply is generated,
The controller includes：
Driver, it is configured as applying driving voltage to the control terminal of the thyristor, to connect described half
Conductor switch element,
Comparator, it is configured as by the detection voltage compared with threshold voltage, and is reached in the detection voltage
Trigger signal is exported in the case of the threshold voltage or in the case where the detection voltage exceedes the threshold voltage,
Adjustment unit, it is configured as adjusting the threshold voltage according to outside instruction,
Switch controller, its be configured as the switch controller make the driver connect the thyristor it
In the case of receiving the trigger signal from the comparator afterwards, the driver is set to disconnect the semiconductor switch member
Part, and
Drive voltage supply unit, it is configured as connecting the drive needed for the thyristor to driver supply
Dynamic voltage,
Wherein, the drive voltage supply unit includes bootstrap diode, boottrap capacitor and the limit electrically connected in a series arrangement
The series circuit of fluid element,
The drive voltage supply unit has first that the lead-out terminal with the hot side of the control power supply unit electrically connects
Terminal,
The drive voltage supply unit has the connection with the thyristor and the negative electrode of the fly-wheel diode
The Second terminal of point electrical connection,
The first terminal of the bootstrap diode along electric current from the drive voltage supply unit is to the drive voltage supply list
The flow direction of the Second terminal of member is set.
2. supply unit according to claim 1, in addition to low pass filter, wherein, the low pass filter is configured
To be filtered processing to the detection voltage exported from the current detector, then by the detection voltage output to the ratio
Compared with device.
3. supply unit according to claim 1 or 2, wherein,
The controller and the thyristor are formed as accommodating integrated circuit in a package.
4. a kind of lighting device, including：
Supply unit according to any one of claim 1 to 3；And
Light source, its direct current power supplied by the supply unit are lit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016089700A JP6692069B2 (en) | 2016-04-27 | 2016-04-27 | Power supply and lighting device |
| JP2016-089700 | 2016-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107371293A true CN107371293A (en) | 2017-11-21 |
Family
ID=60081433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710288553.5A Pending CN107371293A (en) | 2016-04-27 | 2017-04-27 | Supply unit and lighting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6692069B2 (en) |
| CN (1) | CN107371293A (en) |
| DE (1) | DE102017107993A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112005498A (en) * | 2018-04-02 | 2020-11-27 | 罗姆股份有限公司 | Switch driving device |
| CN113383485A (en) * | 2019-02-07 | 2021-09-10 | 罗姆股份有限公司 | Switch driving device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7066112B2 (en) * | 2018-09-28 | 2022-05-13 | 東芝ライテック株式会社 | Lighting device and lighting equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420804A (en) * | 2008-11-13 | 2009-04-29 | 沈锦祥 | High power LED lamp driving power source and combination of matched lamp |
| US20090273290A1 (en) * | 2008-05-05 | 2009-11-05 | Micrel, Inc. | Boost LED Driver Not Using Output Capacitor and Blocking Diode |
| CN104350671A (en) * | 2012-06-11 | 2015-02-11 | 株式会社村田制作所 | Switching power source device |
| CN104717799A (en) * | 2013-12-16 | 2015-06-17 | 松下知识产权经营株式会社 | Led lighting device |
| US20160011610A1 (en) * | 2014-07-11 | 2016-01-14 | Rohm Co., Ltd. | Dc-dc converter and television receiver therewith |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015080335A (en) * | 2013-10-16 | 2015-04-23 | 株式会社東芝 | Gate drive circuit |
-
2016
- 2016-04-27 JP JP2016089700A patent/JP6692069B2/en active Active
-
2017
- 2017-04-13 DE DE102017107993.9A patent/DE102017107993A1/en not_active Withdrawn
- 2017-04-27 CN CN201710288553.5A patent/CN107371293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090273290A1 (en) * | 2008-05-05 | 2009-11-05 | Micrel, Inc. | Boost LED Driver Not Using Output Capacitor and Blocking Diode |
| CN101420804A (en) * | 2008-11-13 | 2009-04-29 | 沈锦祥 | High power LED lamp driving power source and combination of matched lamp |
| CN104350671A (en) * | 2012-06-11 | 2015-02-11 | 株式会社村田制作所 | Switching power source device |
| CN104717799A (en) * | 2013-12-16 | 2015-06-17 | 松下知识产权经营株式会社 | Led lighting device |
| US20160011610A1 (en) * | 2014-07-11 | 2016-01-14 | Rohm Co., Ltd. | Dc-dc converter and television receiver therewith |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112005498A (en) * | 2018-04-02 | 2020-11-27 | 罗姆股份有限公司 | Switch driving device |
| CN112005498B (en) * | 2018-04-02 | 2024-04-09 | 罗姆股份有限公司 | Switch driving device |
| CN113383485A (en) * | 2019-02-07 | 2021-09-10 | 罗姆股份有限公司 | Switch driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017200326A (en) | 2017-11-02 |
| JP6692069B2 (en) | 2020-05-13 |
| DE102017107993A1 (en) | 2017-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9433055B2 (en) | Lighting device and illumination apparatus including same | |
| EP2248249B1 (en) | Electronic driver circuit and method | |
| US9769887B2 (en) | Power converter for an LED assembly and lighting application | |
| US8076920B1 (en) | Switching power converter and control system | |
| CN102832836B (en) | Cascade boost and inverting buck converter with independent control | |
| EP2503846B1 (en) | Lighting device and illumination apparatus using the same | |
| US8482214B2 (en) | Apparatus and methods of operation of passive LED lighting equipment | |
| US20120146525A1 (en) | Apparatus and methods of operation of passive and active led lighting equipment | |
| CN104054226A (en) | Ripple cancellation converter with high power factor | |
| JP2010541256A (en) | Power factor correction circuit and drive circuit | |
| JP2013118133A (en) | Lighting device and luminaire having the same | |
| JP2013118134A (en) | Lighting device and luminaire having the same | |
| US10299331B2 (en) | LED retrofit driver circuit and method of operating the same | |
| CN103249220A (en) | Semiconductor light emitting element drive device and lighting fixture with the same | |
| JP2013118131A (en) | Lighting device and luminaire having the same | |
| JP2013118132A (en) | Lighting device and luminaire having the same | |
| CN109196952A (en) | Load control device for LED source | |
| US20100270930A1 (en) | Apparatus and methods of operation of passive led lighting equipment | |
| CN107371293A (en) | Supply unit and lighting device | |
| Garcia et al. | Electronic driver without electrolytic capacitor for dimming high brightness LEDs | |
| US10757782B2 (en) | AC/DC converters having power factor correction | |
| AU2010286130B2 (en) | Apparatus and methods of operation of passive and active LED lighting equipment | |
| US20100270931A1 (en) | Apparatus and methods of operation of passive led lighting equipment | |
| CN107112896A (en) | Nonisulated type supply unit | |
| JP6840997B2 (en) | Lighting equipment and lighting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20211217 |