WO2016047964A1 - Circuit d'attaque de del à courant alternatif - Google Patents

Circuit d'attaque de del à courant alternatif Download PDF

Info

Publication number
WO2016047964A1
WO2016047964A1 PCT/KR2015/009759 KR2015009759W WO2016047964A1 WO 2016047964 A1 WO2016047964 A1 WO 2016047964A1 KR 2015009759 W KR2015009759 W KR 2015009759W WO 2016047964 A1 WO2016047964 A1 WO 2016047964A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
mos fet
resistor
unit
output terminal
Prior art date
Application number
PCT/KR2015/009759
Other languages
English (en)
Korean (ko)
Inventor
조홍수
신소봉
Original Assignee
메를로랩 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 메를로랩 주식회사 filed Critical 메를로랩 주식회사
Publication of WO2016047964A1 publication Critical patent/WO2016047964A1/fr

Links

Images

Classifications

    • 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
    • H05B45/31—Phase-control circuits
    • 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

Definitions

  • An embodiment of the present invention relates to an AC LED driving circuit. For example, flicker free characteristics are greatly improved and a high power factor is realized, while stable dimming function is always possible through normal operation of the dimmer.
  • the present invention relates to an AC LED driving circuit.
  • AC LED driving circuit proposed to drive LED under AC power has advantages of simple manufacturing process, low defect rate and long life compared with Switched mode power supply (SMPS) method.
  • SMPS Switched mode power supply
  • Figure 1 is a view showing a conventional general AC LED driving circuit
  • the AC LED driving circuit is a basic principle to sequentially control the current source, high efficiency and long life and reliability and reduction of the size of LED lighting, etc. It has several advantages.
  • the AC LED driving circuit has a weak point in terms of flicker generation, and the present applicant has proposed Korean Patent No. 1414902 (name: “AC LED Driving Circuit”).
  • FIG. 2 conceptually shows such an “AC LED driving circuit”. As shown in FIG. 2, when the LED is insufficient when the LED is driven, an insufficient voltage is supplied from the voltage charger to eliminate the light off phenomenon and thereby flicker. Improve properties. Power factor characteristics are also improved by the switch control function, which allows the voltage charger to maintain a fixed current value even beyond the peak of the supply voltage.
  • the AC LED driving circuit according to FIG. 2 eliminates the flicker phenomenon and improves the power factor as described above.
  • Another function of LED lighting is dimming (hereinafter, the term “dimming”) is used. It was relatively weak in terms of
  • Applicant has applied for an additional independent current path (I_HOLD) for driving a dimmer for dimming in a typical AC LED driving circuit through Korean Patent No. 1357916 (name of the invention: “Dimming system of lighting device using light emitting element”). We propose a method of forming).
  • Figure 3 shows the AC LED driving circuit of the dimming system of the lighting device using such a light emitting device.
  • the general AC LED driving circuit is a method of controlling the current source according to the magnitude of the voltage by simply driving the dimmer by the conventional dimming method. Therefore, the brightness of the light naturally occurs according to the waveform of the input voltage changed through the dimmer. This allows for instant dimming.
  • An embodiment of the present invention provides an AC LED driving circuit capable of implementing a stable dimming function through the normal operation of the dimmer while the flicker free characteristic is greatly improved and a high power factor is realized.
  • An AC LED driving circuit includes a power supply including a dimmer receiving an AC voltage of an AC power source and a rectifying circuit for the output voltage of the dimmer, an LED lighting unit connected to an output terminal of the rectifying circuit; And a current channel switching unit connected to an output terminal of the LED lighting unit to form a current supply channel of the LED lighting unit, and connected in parallel to a connection line between the power supply unit and the LED lighting unit to charge voltage from the power supply unit and to the LED lighting unit.
  • a voltage driver configured to selectively supply a charging voltage to the LED lighting unit having a switching function for the LED lighting unit, and a LED driving unit including a charging voltage switching control unit to control a switching function of the voltage charging unit, between the rectifying circuit and an input terminal of the LED lighting unit.
  • An input terminal at a connection line between a connection line and an output end of the LED lighting unit and the rectifier circuit A voltage controlled current source (VCCS) to which the output terminals are respectively connected, a common resistor commonly connected to an output line of the voltage controlled current source and a connection line between the output terminal of the LED lighting unit and the rectifier circuit, and the voltage controlled current source
  • VCCS voltage controlled current source
  • a reference voltage supply unit connected in parallel on a connection line including the common resistor between the output terminal of the output terminal and the rectifier circuit and applying a positive reference voltage to the voltage controlled current source, the voltage controlled current source connected in series with the common resistor.
  • An output voltage is input to a negative voltage of the voltage controlled current source, and a current supplied to the LED driver from the rectifier circuit is included in a negative feedback path, and a connection line between the output terminal of the rectifier circuit and the dimmer driver.
  • the reference voltage phase converter may convert an input signal from the rectifier circuit phase-cut in the dimmer into a pulse type signal and then convert the converted pulse into a reference voltage.
  • the reference voltage phase conversion unit is connected to the output terminal of the rectifier circuit pulse generator for converting the phase cut (Phase cut) input signal from the dimmer in the form of a square wave (Pulse Generator), and the output terminal of the pulse generator It may include a voltage pulse converter connected to the converter for converting the pulse signal changed in the pulse generator into a reference voltage.
  • the pulse generator may also include a first resistor connected to an output terminal of the rectifier circuit, a second resistor connected in series with the first resistor, and an OP amplifier in which a positive input terminal is connected in parallel between the first resistor and the second resistor.
  • the voltage pulse converter may include a low pass filter connected to an output terminal of the OP amplifier.
  • the pulse generator may also include a first resistor connected to an output terminal of the rectifier circuit, a second resistor connected in series with the first resistor, and an OP amplifier in which a positive input terminal is connected in parallel between the first resistor and the second resistor.
  • the voltage pulse converter may include an integrator connected to an output terminal of the OP amplifier and a sample and hold circuit connected to an output terminal of the integrator.
  • the voltage pulse converter is connected to the output terminal of the rectifier circuit generates a sampling time signal based on the output voltage output through the rectifier circuit, and generates a sampling time reference signal for controlling the sample hold circuit based on the generated signal It may further include wealth.
  • the voltage charging unit of the LED driver may include a capacitor connected to a connection line between the power supply unit and the LED lighting unit, and a first MOS FET installed on the connection line between the capacitor and the LED lighting unit to perform a switching function.
  • the voltage switching controller may include a second MOS FET connected to the capacitor-side contact of the first MOS FET, a first resistor disposed on a connection line between the capacitor-side contact of the first MOS FET and the second MOS FET.
  • the current channel switching unit includes a resistor, and an output terminal is connected to the third MOS FET and the third MOS FET connected to the output terminal of the LED lighting unit, and a reference voltage is input to the input terminal.
  • a reference voltage VREF1 input to the first OP amplifier of the charging voltage switching controller, a reference voltage VREF2 input to the second OP amplifier of the current channel switching unit, and a second resistor and a third resistor are as follows.
  • the condition of may be established.
  • the voltage charging unit of the LED driver may include a capacitor connected to a connection line between the power supply unit and the LED lighting unit, and a first MOS FET installed on the connection line between the capacitor and the LED lighting unit to perform a switching function.
  • the voltage switching controller may include a second MOS FET connected to the capacitor-side contact of the first MOS FET, a first resistor disposed on a connection line between the capacitor-side contact of the first MOS FET and the second MOS FET.
  • the current channel switching unit includes a resistor, and a third MOS FET connected to an output terminal of the LED lighting unit, an output terminal is connected to the third MOS FET, and a reference voltage is input to the input terminal. And a second OP amplifier to which the output voltage of the third MOS FET is input, respectively, wherein the reference voltage VREF1 is input to the first OP amplifier of the charging voltage switching controller and the second OP amplifier is input to the second OP amplifier of the current channel switching unit.
  • the voltage charging unit of the LED driver may include a capacitor connected to a connection line between the power supply unit and the LED lighting unit, and a first MOS FET installed on the connection line between the capacitor and the LED lighting unit to perform a switching function.
  • the voltage switching controller may include a second MOS FET connected to the capacitor side contact of the first MOS FET, a first resistor disposed on a connection line between the second MOS FET and the capacitor side contact of the first MOS FET, An output terminal connected to a second MOS FET and commonly connected to a first OP amplifier to which a reference voltage and an output voltage of the second MOS FET are input, an output terminal of the second MOS FET, and an output terminal of the current channel switching unit, respectively; And a fourth resistor disposed on a connection line between a second resistor, the second resistor, and an output terminal of the second MOS FET, wherein the current channel switching unit is the LED lighting unit.
  • a second OP amplifier connected to an output terminal of the third MOS FET and an output terminal connected to the third MOS FET, wherein a reference voltage and an output voltage of the third MOS FET are respectively input to an input terminal, wherein the charging voltage switching controller
  • the reference voltage VREF1 input to the first OP amplifier of the reference voltage VREF2 input to the second OP amplifier of the current channel switching unit and the second resistor and the fourth resistor
  • the condition of may be established.
  • the dimmer driver further includes a MOS FET in which the voltage control current source is connected to a drain line between the output terminal of the rectifier circuit and the first LED part, a source is connected to the common resistor, and a gate is connected to the reference voltage supply part.
  • the reference voltage supply unit includes a resistor connected to an internal supply (Iref) and an output terminal of the MOS FET, a gate of the MOS FET is connected on a connection line of the current source and the resistor, and the resistor is the common. It may be connected in parallel on the connection line between the resistor and the rectifier circuit.
  • the LED lighting unit may include an n-th LED lighting unit located at a longest distance from the output terminal of the rectifying circuit, starting with a first LED lighting unit located at a shortest distance from the output terminal of the rectifying circuit, and the current channel switching unit may be configured to be the first LED lighting unit To n-th LED lighting units may be individually connected to form a current supply channel for the corresponding LED lighting unit.
  • the AC LED driving circuit enables a significant improvement in flicker free characteristics and a high power factor while at the same time allowing the normal operation of the dimmer at all times.
  • FIG. 1 is a view showing a conventional general AC LED driving circuit
  • FIG. 3 conceptually illustrates a form different from FIG. 2 of a conventional AC LED driving circuit.
  • FIG. 5 is a diagram illustrating an AC LED driving circuit to which each embodiment of the LED driving unit, the dimmer driving unit, and the reference voltage phase conversion unit is applied in the AC LED driving circuit according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an embodiment of a reference voltage phase shifter in FIG. 5;
  • FIG. 7 is a view illustrating generation of a duty signal according to a dimming angle in the AC LED driving circuit of FIG. 6;
  • FIG. 10 is a view illustrating another embodiment of a pulse generator and a voltage pulse converter of a reference voltage phase shift unit in an AC LED driving circuit according to FIG. 5;
  • FIG. 10 is a view illustrating another embodiment of a pulse generator and a voltage pulse converter of a reference voltage phase shift unit in an AC LED driving circuit according to FIG. 5;
  • 11 and 12 illustrate another embodiment of the LED driver in the AC LED driver circuit according to FIG. 5.
  • ... unit means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. Can be.
  • FIG. 4 is a view conceptually illustrating an AC LED driving circuit according to an embodiment of the present invention.
  • the AC LED driving circuit 100 includes a power supply 110, LED driver 120, dimmer driver 130, reference voltage phase conversion unit 140 It is composed.
  • the power supply unit 110 includes a dimmer 111 that receives an AC voltage from an external AC power source and a rectifier circuit 112 for an output voltage of the dimmer 111.
  • a dimmer 111 that receives an AC voltage from an external AC power source
  • a rectifier circuit 112 for an output voltage of the dimmer 111.
  • any one kind of a conventional phase-cut scheme may be selected and used as the dimmer 111, and thus, a detailed description and illustration of the dimmer 111 will be omitted in the present embodiment.
  • the rectifier circuit 112 may be a conventional bridge circuit, so the detailed description and illustration of the rectifier circuit 112 in the present embodiment is omitted.
  • the LED driver 120 includes an LED lighting unit 121, a current channel switching unit 122, a voltage charging unit 123, and a charging voltage switching control unit 124.
  • the LED lighting unit 121 is connected to the output terminal of the rectifier circuit 112 of the power supply unit 110, but the figure illustrates the form in which the LED lighting unit 121 is formed of one LED, but this is for convenience of illustration.
  • the LED lighting unit 121 may be formed to include a plurality of LEDs.
  • the LED lighting unit 121 may include an n-th LED unit located at the longest distance from the first LED unit located at the shortest distance with respect to the output terminal of the rectifier circuit 112.
  • the plurality of LED units included in the LED lighting unit 121 may be sequentially connected in series from the first LED unit to the nth LED unit, and individual LEDs included in each LED unit may be sequentially connected in series.
  • each LED unit may be formed of one LED or two or more LEDs may be formed in a group unit.
  • the current channel switching unit 122 is connected to the output terminal of the LED lighting unit 121 to form a current supply channel for the LED lighting unit 121.
  • the current channel switching unit 122 since the LED lighting unit 121 has a single configuration, the current channel switching unit 122 has a single configuration, but as described above, since the LED lighting unit 121 may be formed in plural, the current The channel switching unit 122 may also be formed in plural and individually connected to the output terminal of each LED lighting unit to form a current supply channel for the corresponding LED lighting unit.
  • a detailed configuration of the current channel switching unit 122 will be described later with reference to FIG. 5.
  • the voltage charging unit 123 is connected in parallel to the connection line between the power supply unit 110 and the LED lighting unit 121 to charge the voltage from the power supply unit 110, and the voltage charging unit 123 is switched to the LED lighting unit 121. It has a function to selectively supply the charging voltage to the LED lighting unit 121.
  • the charging voltage switching controller 124 controls the switching function of the voltage charging unit 123.
  • the dimmer driver 130 may include a voltage control current source 131, a common resistor 132, and a reference voltage supply unit 133.
  • the voltage controlled current source VCCS is connected to an input line between the rectifier circuit 112 of the power supply 110 and the input terminal of the LED lighting unit 121, and the output terminal of the LED lighting unit 121. An output terminal is connected to the connection line between the rectifier circuits 112.
  • the common resistor 132 is commonly connected to the output line of the voltage control current source 131 and the connection line between the output terminal of the LED lighting unit 121 and the rectifier circuit 112.
  • the reference voltage supply 133 is connected in parallel on a connection line including a common resistor 132 between the output terminal of the voltage controlled current source 131 and the rectifier circuit 112, and the reference voltage supply 133 is a voltage controlled current source 131. Apply a positive reference voltage to).
  • the reference voltage supply unit 133, the common resistor 132, and the voltage control current source 131 form the dimmer driver 130 in the form of negative feedback, that is, connected in series with the common resistor 132.
  • the output voltage of the voltage controlled current source 131 is input to the negative voltage of the voltage controlled current source 131 so that the current supplied from the rectifier circuit 112 to the LED driver 120 is supplied to the negative feedback path of the dimmer driver 130. Therefore, the current supplied to the LED driver 120 is included in the inferior path of the dimmer driver 130, and the current value flowing through the voltage control current source 131 is included in the current value supplied to the LED driver 120. Interlocked.
  • the voltage difference between the positive input terminal and the negative input terminal of the reference voltage supply unit 133 with respect to the voltage controlled current source 131 directly affects the output current value of the voltage controlled current source 131. .
  • the output current of the voltage controlled current source 131 and the common resistor 132 R connected in series thereto are applied to the negative input terminal of the voltage controlled current source 131, and between the input voltage and the output current of the voltage controlled current source 131.
  • a negative feedback path is formed at.
  • the path of the current supplied to the LED driver 120 is connected in parallel to the negative feedback path, the current supplied to the LED driver 120 is applied to the common resistor 132 R to input the voltage controlled current source 131. It has a direct effect on the voltage and also on the negative feedback circuit. And this is explained by the following three cases.
  • the voltage controlled current source 131 is turned off. Accordingly, the output current of the voltage control current source 131 becomes 0 so that the current output from the rectifier circuit 112 of the power supply 110 and the current supplied to the LED driver 120 become the same value. This corresponds to a condition in which the dimmer 111 is driven by a supply current for the LED driver 120.
  • the negative part for driving the dimmer 111 depends entirely on the value of the positive input voltage V REF1 of the voltage control current source 131 and the value of the common resistor 132 R.
  • a feedback circuit is formed, whereby the value of the output current of the voltage controlled current source 131 is also set by the positive input voltage V REF1 and the value of the common resistor 132 R of the voltage controlled current source 131.
  • the current output from the rectifier circuit 112 of the power supply unit 110 and the output current of the voltage control current source 131 is the same value, which corresponds to the condition that the dimmer 111 is driven by the dimmer driver 130. .
  • the third case may be represented by the following equation, and the following equation theorem may be derived using general circuit theory in the circuit of FIG. 4.
  • the output current of the voltage controlled current source g m
  • the output current of the voltage controlled current source 131 is supplemented with the value of the above equation.
  • the value of the current supplied to the LED driver 120 becomes 0, it indicates that the output current of the voltage controlled current source 131 is determined entirely through V REF1 and the common resistor 132 R.
  • the dimmer 111 is driven by the current supplied to the LED driver 120, and the current supplied to the LED driver 120 drives the dimmer 111. If it is insufficient in the supplement is made through the output current of the voltage control current source 131.
  • the reference voltage phase shifter 140 is connected to a connection line between the output terminal of the rectifier circuit 112 and the dimmer driver 130, and the reference voltage phase shifter 140 dimmes the voltage input to the dimmer driver 130. After detecting a dimming angle, a control voltage for varying the driving current of the LED lighting unit 121 included in the LED driving unit 120 is generated based on the detected dimming angle value.
  • the dimming angle of the input voltage with respect to the dimmer driver detected through the reference voltage phase converter is equal to the dimming angle of the input voltage with respect to the LED driver connected in parallel with the dimmer driver with respect to the power supply.
  • the amount of current supplied to the LED lighting unit of the LED driving unit varies according to the dimming angle of the input voltage to the dimmer driving unit detected through the reference voltage phase shifting unit, and thus the flicker free characteristic of the LED driving circuit is changed. Improvements and high power factors can be realized while the dimming function of the dimmer can always be kept stable.
  • FIG. 5 is a diagram illustrating an example in which each embodiment of the LED driver, the dimmer driver, and the reference voltage phase shifter is applied to an AC LED driver circuit according to an exemplary embodiment of the present invention.
  • the AC LED driving circuit 200 includes a power supply unit 110, an LED driver 120, a dimmer driver 130, and a reference voltage phase shifter 140, and the LED driver except for the power supply unit 110.
  • a power supply unit 110 an LED driver 120, a dimmer driver 130, and a reference voltage phase shifter 140, and the LED driver except for the power supply unit 110.
  • a detailed configuration of the 120, the dimmer driver 130, and the reference voltage phase converter 140 will be described.
  • the power supply unit 110 includes a dimmer 111 and a rectifier circuit 112, and the dimmer 111 and the rectifier circuit 112 may be referred to with reference to FIG. 4.
  • the LED driver 120 includes a charge voltage switching controller 124 including a second MOS FET 124a, a first resistor 124b, a first OP amplifier 124c, and a second resistor 124d.
  • the second MOS FET 124a is connected to the capacitor 123a side contact of the first MOS FET 123b of the switch function included in the voltage charging unit 123.
  • the first resistor 124b is provided on a connection line between the capacitor 123a side contact of the first MOS FET 123b and the second MOS FET 124a.
  • An output terminal of the first OP amplifier 124c is connected to the second MOS FET 124a, and a reference voltage and an output voltage of the second MOS FET 124a are respectively input to the input terminal of the first OP amplifier 124c.
  • the second resistor 124d is commonly connected to the output terminal of the second MOS FET 124a and the current channel switching unit 122.
  • the current channel switching unit 122 has a third MOS FET 122a connected to the output terminal of the LED lighting unit 120 and an output terminal is connected to the third MOS FET 122a of the current channel switching unit 122. And a second OP amplifier 122b to which a reference voltage and an output voltage of the third MOS FET 122a are respectively input.
  • a diode is installed on the connection line between the power supply unit 110 and the capacitor 123a and the connection line between the power supply unit 110 and the LED lighting unit 120, respectively.
  • the second OP amplifier 122b and the third MOS FET 122a of the current channel switching unit 122 form a main current source.
  • the first resistor 124b and the first OP amplifier 124c of the charging voltage switching control unit 124 are charged by the charging voltage of the voltage V2.
  • An auxiliary current source formed of the second MOS FET 124a and the second resistor 124d is driven to generate a voltage difference value between the source-gate of the third MOS FET 122a of the current channel switching unit 122. .
  • the condition of VREF1 < VREF2 must be established.
  • the voltage control current source 131 includes a fourth MOS FET 131a and a third OP amplifier 131b. That is, the third OP amplifier 131b is installed on the connection line between the gate of the fourth MOS FET 131a and the reference voltage supply unit 133, and a positive voltage is applied from the reference voltage supply unit 133 and the fourth MOS is applied. A negative voltage is applied from a parallel connection point between a connection line between the output terminal of the FET 131a and the common resistor 132 and a connection line between the LED lighting unit 121 and the rectifier circuit 112.
  • the g m value of the equation in the description of the AC LED drive circuit 100 with reference to FIG. 4 can be greatly increased.
  • the reference voltage supply unit 133 includes an internal source (133a) and a resistor (133b) connected to an output terminal of the current source (133a).
  • the voltage value of the current source 133a is input to the (+) input terminal of the third OP amplifier 131b, and the resistor 133b is connected in parallel on the connection line between the common resistor 132 and the rectifier circuit 112. do.
  • the reference voltage phase conversion unit 140 converts the input signal from the rectified circuit 112 phase-cut in the dimmer 111 into a pulse type signal and then converts the converted pulse into a reference voltage.
  • the reference voltage phase converter 140 may include a pulse generator 141 and a voltage pulse converter 142.
  • the pulse generator 141 is connected to the output terminal of the rectifier circuit 112, and the pulse generator 141 converts the input signal phase cut in the dimmer 111 into a square wave shape.
  • the voltage pulse converter 142 is connected to the output terminal of the pulse generator 141 to convert the pulse signal changed by the pulse generator 141 into a reference voltage.
  • FIG. 6 is a diagram illustrating a specific form of the pulse generator and the voltage pulse converter.
  • the pulse generator 341 of the reference voltage phase shifter 340 includes a first resistor 341a connected to the output terminal of the rectifier circuit 112 and a second resistor connected in series with the first resistor 341a. And an op amp 341c in which a positive input terminal is connected in parallel between the resistor 341b and the first resistor 341a and the second resistor 341b.
  • the voltage pulse converter includes a low pass filter 342 connected to an output terminal of the OP amplifier 341c included in the pulse generator 341.
  • the rest of the configuration except for the reference voltage phase shifter 340 of FIG. 6 is the same as those of the AC LED driving circuit 200 according to the embodiment of FIG. 5, and accordingly, the reference voltage phase shifter 340 of FIG. 6. Only the reference numerals of) and the rest of the configuration of the AC LED driving circuit 300 and reference numerals and detailed description of each configuration will be omitted.
  • phase cut dimmed waveform is scaled down to a low voltage, and then input to a comparator with a specific reference voltage.
  • a pulse signal is generated as shown in FIG. 7.
  • a signal having a different magnitude may be generated according to the duty value. That is, as shown in FIGS. 8 and 9, a high voltage when the dimming angle is high, and a low voltage signal may be generated when the dimming angle is low. It can be used as the reference voltage of and can implement dimming function.
  • the pulse generator 441 of the reference voltage phase shifter 400 includes a first resistor 441a connected to an output terminal of the rectifier circuit 112 and a second resistor connected in series with the first resistor 441a. And an op amp 441c in which a positive input terminal is connected in parallel between the resistor 441b and the first resistor 441a and the second resistor 441b.
  • the voltage pulse converter 442 includes an integrator 442a connected to the output terminal of the OP amplifier 441c included in the pulse generator 441 and a sample hold circuit 442b connected to the output terminal of the integrator 442a. Hold Circuit).
  • the voltage pulse converter 442 is connected to the output terminal of the rectifier circuit 112 to generate a signal of the sampling time based on the output voltage output through the rectifier circuit 112, and the sample hold based on the generated signal
  • the apparatus may further include a sampling time reference signal generator 442c for controlling the circuit 442b.
  • the rest of the configuration except for the reference voltage phase shifter 440 of FIG. 10 is the same as those of the AC LED driving circuit 200 according to the embodiment of FIG. 5, and accordingly, the reference voltage phase shifter 440 of FIG. 10. Only the reference numerals of) and the rest of the configuration of the AC LED driving circuit 400 and reference numerals and detailed description of each configuration is omitted.
  • the reference voltage phase shifter of the present invention is not limited to the embodiment of FIGS. 5, 6, and 10, and the output terminal and the dimmer driver of the rectifier circuit 112 ( A condition for generating a control voltage for varying the driving current of the LED driver 120 based on the detected dimming angle after detecting the dimming angle of the voltage input to the dimmer driver 130 by being connected to the connection line between the 130 lines. More modifications can be made within the range to be satisfied.
  • 11 and 12 illustrate another embodiment of the LED driver in the AC LED driver circuit of FIG. 5.
  • the current channel switching unit 122 further includes a third resistor 122c as compared to the AC LED driving circuit 200 of FIG. 5. There is.
  • the current channel switching unit 122 has a third MOS FET 122a connected to the output terminal of the LED lighting unit 120, and an output terminal is connected to the third MOS FET 122a of the current channel switching unit 122.
  • a third resistor 122c provided on the connection line with the second resistor 124d of 124.
  • the AC LED driving circuit 500 includes the third resistor 122c in the current channel switching unit 122 as compared with the AC LED driving circuit 200 of FIG. 5, FIG. 5.
  • the same reference numerals are used for parts common to and the detailed description thereof is omitted.
  • the AC LED driving circuit 500 has the reference voltage VREF1 input to the first OP amplifier 124c of the charging voltage switching controller 124 and the second OP amplifier 122b of the current channel switching unit 122 according to this configuration. Between the reference voltage VREF2 input to the second resistor 124d of the charging voltage switching control unit 124 and the third resistor 122c of the current channel switching unit 122.
  • the second OP amplifier 122b, the third MOS FET 122a and the third resistor 122c of the current channel switching unit 122 form a main current source.
  • the first resistor 124b and the first OP amplifier 124c of the charging voltage switching control unit 124 are charged by the charging voltage of the voltage V2.
  • An auxiliary current source formed of the second MOS FET 124a and the common resistor 132 is driven to generate a voltage difference value between the source-gate of the third MOS FET 122a of the current channel switching unit 122.
  • the second resistor 124d R2 of the charging voltage switching controller 124 and the third resistor 122c of the current channel switching unit 122 are connected to the second resistor 124d R2 of the charging voltage switching controller 124 and the third resistor 122c of the current channel switching unit 122.
  • the condition must be established.
  • the AC LED driving circuit 600 according to FIG. 12 is different from the AC LED driving circuit 200 according to FIG. 5 in that the charging voltage switching controller 124 further includes a fourth resistor 124e. .
  • the charging voltage switching controller includes a second MOS FET 124a, a first resistor 124b, a first OP amplifier 124c, a second resistor 124d, and a fourth resistor 124e.
  • the second MOS FET 124a is connected to the capacitor 123a side contact of the first MOS FET 123b of the switch function included in the voltage charging unit 123.
  • the first resistor 124b is provided on a connection line between the capacitor 123a side contact of the first MOS FET 123b and the second MOS FET 124a.
  • An output terminal of the first OP amplifier 124c is connected to the second MOS FET 124a, and a reference voltage and an output voltage of the second MOS FET 124a are respectively input to the input terminal of the first OP amplifier 124c.
  • the second resistor 124d is commonly connected to the output terminal of the second MOS FET 124a and the current channel switching unit 122.
  • the fourth resistor 124e is on the connection line between the output terminal of the third MOS FET 122a of the current channel switching unit 122 and the negative voltage input terminal of the first MOS FET 124a of the charging voltage switching controller 124. At the same time, the output terminal of the third MOS FET 122a of the current channel switching unit 122 is connected in parallel with the second resistor 124d of the charging voltage switching control unit 124.
  • the AC LED driving circuit according to the present invention, it is possible to significantly improve the flicker free characteristics and to implement a high power factor (power factor) At the same time, the dimmer always operates normally.
  • the present invention can be widely used in the LED drive circuit.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne un circuit d'attaque de DEL à courant alternatif qui peut améliorer de façon significative des caractéristiques sans scintillement et en même temps mettre en œuvre un facteur de puissance élevé et une fonction de gradation stable au moyen du fonctionnement normal constant d'un gradateur.
PCT/KR2015/009759 2014-09-24 2015-09-17 Circuit d'attaque de del à courant alternatif WO2016047964A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0127515 2014-09-24
KR1020140127515A KR101626360B1 (ko) 2014-09-24 2014-09-24 교류 led 구동회로

Publications (1)

Publication Number Publication Date
WO2016047964A1 true WO2016047964A1 (fr) 2016-03-31

Family

ID=55581432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2015/009759 WO2016047964A1 (fr) 2014-09-24 2015-09-17 Circuit d'attaque de del à courant alternatif

Country Status (2)

Country Link
KR (1) KR101626360B1 (fr)
WO (1) WO2016047964A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106533220A (zh) * 2016-12-09 2017-03-22 浙江工业大学 一种后馈式限定输入电流包络的单相桥式整流电路
CN106787858A (zh) * 2016-12-09 2017-05-31 浙江工业大学 一种前馈式限定输入电流包络的单相桥式整流电路

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002141802A (ja) * 2000-11-01 2002-05-17 Sony Corp Ａ／ｄ変換装置
KR20080034057A (ko) * 2006-10-13 2008-04-18 페어차일드코리아반도체 주식회사 스위칭 모드 파워 서플라이 및 그 구동 방법
KR101357916B1 (ko) * 2012-08-06 2014-02-03 메를로랩 주식회사 발광소자를 이용한 조명장치의 디밍 시스템
KR20140024138A (ko) * 2012-08-20 2014-02-28 메를로랩 주식회사 전류원의 시간지연 기능을 갖는 엘이디 구동회로
KR101414902B1 (ko) * 2013-11-05 2014-07-03 메를로랩 주식회사 교류 led 구동회로

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002141802A (ja) * 2000-11-01 2002-05-17 Sony Corp Ａ／ｄ変換装置
KR20080034057A (ko) * 2006-10-13 2008-04-18 페어차일드코리아반도체 주식회사 스위칭 모드 파워 서플라이 및 그 구동 방법
KR101357916B1 (ko) * 2012-08-06 2014-02-03 메를로랩 주식회사 발광소자를 이용한 조명장치의 디밍 시스템
KR20140024138A (ko) * 2012-08-20 2014-02-28 메를로랩 주식회사 전류원의 시간지연 기능을 갖는 엘이디 구동회로
KR101414902B1 (ko) * 2013-11-05 2014-07-03 메를로랩 주식회사 교류 led 구동회로

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106533220A (zh) * 2016-12-09 2017-03-22 浙江工业大学 一种后馈式限定输入电流包络的单相桥式整流电路
CN106787858A (zh) * 2016-12-09 2017-05-31 浙江工业大学 一种前馈式限定输入电流包络的单相桥式整流电路
CN106533220B (zh) * 2016-12-09 2018-09-21 浙江工业大学 一种后馈式限定输入电流包络的单相桥式整流电路
CN106787858B (zh) * 2016-12-09 2018-12-18 浙江工业大学 一种前馈式限定输入电流包络的单相桥式整流电路

Also Published As

Publication number Publication date
KR101626360B1 (ko) 2016-06-01
KR20160035780A (ko) 2016-04-01

Similar Documents

Publication Publication Date Title
WO2011052834A1 (fr) Dispositif de module del à commande à courant constant
WO2014148767A1 (fr) Circuit de pilotage de del utilisant des diodes en double pont et dispositif d'éclairage à del le comprenant
WO2013089506A1 (fr) Dispositif d'attaque de diode électroluminescente (del)
WO2014189298A1 (fr) Appareil de commande de diode électroluminescente
WO2014209008A1 (fr) Dispositif d'éclairage à diodes électroluminescentes et circuit de commande pour ce dernier
WO2014058196A2 (fr) Appareil d'alimentation de diode électroluminescente et procédé d'alimentation pour l'alimentation continue d'une diode électroluminescente
WO2014209009A1 (fr) Dispositif d'éclairage à diodes électroluminescentes et circuit de commande pour celui-ci
WO2013100733A1 (fr) Appareil de commande de rétroéclairage
WO2010095813A2 (fr) Appareil d'éclairage led basse consommation
WO2010107161A1 (fr) Dispositif électroluminescent et son circuit de commande
WO2020080778A1 (fr) Appareil d'affichage et son procédé de commande
WO2015041393A1 (fr) Circuit de commande d'appareil d'éclairage à diodes électroluminescentes
WO2014126392A1 (fr) Circuit d'alimentation électrique permettant de modifier la fréquence de scintillement d'une diode électroluminescente
WO2015152548A1 (fr) Module électroluminescent
WO2014189284A1 (fr) Circuit de commande et procede pour generer une tension pour un dispositif d'eclairage a diode electroluminescente
EP2959753A1 (fr) Circuit d'attaque et de gradation d'intensité de del et procédé de configuration
WO2010058923A2 (fr) Dispositif lumineux à courant alternatif, son dispositif d'attaque et procédé d'attaque associé
WO2013133547A1 (fr) Circuit de commande de led qui présente une fonction d'amélioration du rendement
WO2015190646A1 (fr) Circuit d'attaque de diodes électroluminescentes
WO2016047964A1 (fr) Circuit d'attaque de del à courant alternatif
WO2017043756A1 (fr) Dispositif et procédé d'attaque de del du type à compensation du facteur de puissance
WO2015068978A1 (fr) Circuit excitateur de led à courant alternatif
WO2015122635A1 (fr) Module d'entraînement de del intelligentes de type connexion directe à ca
WO2014073911A1 (fr) Dispositif et procédé de commande de fonctionnement et de gradation d'une del à courant alternatif
WO2015122753A1 (fr) Dispositif de communication utilisant une ligne électrique et système d'éclairage à del utilisant celui-ci

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15845054

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15845054

Country of ref document: EP

Kind code of ref document: A1