WO2021120561A1 - Alimentation en puissance de pilotage de del connectable sous tension et procédé de commande associé - Google Patents

Alimentation en puissance de pilotage de del connectable sous tension et procédé de commande associé Download PDF

Info

Publication number
WO2021120561A1
WO2021120561A1 PCT/CN2020/096928 CN2020096928W WO2021120561A1 WO 2021120561 A1 WO2021120561 A1 WO 2021120561A1 CN 2020096928 W CN2020096928 W CN 2020096928W WO 2021120561 A1 WO2021120561 A1 WO 2021120561A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
circuit
terminal
voltage
output
Prior art date
Application number
PCT/CN2020/096928
Other languages
English (en)
Chinese (zh)
Inventor
毛昭祺
王纪周
柯乃泉
Original Assignee
毛昭祺
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 毛昭祺 filed Critical 毛昭祺
Publication of WO2021120561A1 publication Critical patent/WO2021120561A1/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

Definitions

  • the invention relates to the technical field of power supplies, in particular to a hot-swappable LED driving power supply and a control method thereof.
  • the output of the driving power supply usually carries an LED lamp load.
  • the no-load voltage of the driving power supply is greater than the voltage of the LED lamp, thereby lighting the LED lamp.
  • the marketization of LED lights has successfully lighted every bridge, every avenue, every building, and even every household. As a result, the visual effect of LED lights will be paid more and more attention. In actual use, there will be loads of LED lights. Unplug it when it is charged and plug it in when it is charged. Since the voltage of the drive power control circuit is greater than the voltage of the LED lamp, the problem of flashing lights will affect the visual effect in an instant. Therefore, there is an urgent need for an LED drive power supply, so that the LED lamp is unplugged when it is charged, and the problem of lamp flicker will not occur.
  • a kind of "a split-type LED lamp and its driving power plug-in protection circuit" disclosed in Chinese patent documents, its publication number CN103037585B, its publication date December 17, 2014, includes the rectification and filtering of the driving power supply
  • the circuit, the voltage dividing resistor R1, the voltage dividing resistor R2, the voltage dividing resistor R3, the resistor R4, and the voltage comparison circuit are connected, and the voltage dividing resistor R1 is connected to the output terminal of the rectifier filter circuit and the first voltage dividing resistor R2.
  • the voltage dividing resistor R2 and the voltage dividing resistor R3 are commonly connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the non-inverting input end of the current comparing circuit.
  • the output level of the voltage comparison circuit and the output level of the current comparison circuit jointly control the feedback current output by the feedback circuit of the driving power supply, so that the PWM control circuit of the driving power supply adjusts the feedback current according to the feedback current.
  • the output voltage of the transformer T1 of the drive power supply; the drive power plug-in protection circuit includes: a voltage divider module, the input terminal and the output terminal are respectively connected to the output terminal of the rectification filter circuit and the inverting input terminal of the voltage comparison circuit , Used to divide the DC power output by the rectification filter circuit to reduce the voltage of the DC power, and output a divided DC power; the voltage detection module, the input terminal is connected to the first end of the resistor R4 for The voltage at the first end of the resistor R4 is detected, and a control level signal is output correspondingly according to the detection result; the voltage division control module, the control end and the voltage division adjustment end are respectively connected to the output end of the voltage detection module and the The output terminal of the voltage dividing module is used to adjust the voltage of the divided DC power according to the control level signal so that the output level of the voltage comparison circuit is adjusted accordingly; the voltage detection module includes: a resistor R13, A resistor R14, a comparator, a resistor R15, and a capacitor
  • the voltage delivered by the LED driving power supply to the LED is detected and controlled, but it still does not solve the problem.
  • the output no-load voltage of the driving power supply is greater than the LED lamp voltage. Flashing problem
  • the invention mainly solves the problem that the existing technology cannot solve the problem that the LED lamp is unplugged and then plugged in when the LED lamp is charged; it provides a hot-swappable LED driving power supply and a control method thereof, and solves the problem that the LED lamp is charged If it is unplugged and reconnected under live condition, the light flickering problem occurs because the output no-load voltage of the drive power supply is greater than the voltage of the LED light.
  • a hot-swappable LED drive power supply including a main circuit, a switch tube S2, a main control circuit, a sub-control circuit and a resistor R1, the main The circuit includes a switch S1.
  • the main circuit processes the energy conversion of the power stage and supplies the LED load under the control of the main control circuit; the input end of the main control circuit is connected to the output end of the main circuit for Sampling the output voltage of the main circuit, the control end of the main control circuit is connected to the sub-control circuit, the output end of the main control circuit is connected to the control end of the switch tube S1; the switch tube S2 is connected in series Between the main circuit and the LED load, the control terminal of the switch tube S2 is connected to the sub-control circuit; the resistor R1 is connected in parallel to the switch tube S2; the sub-control circuit includes a first sampling terminal , A second sampling terminal, a first output terminal and a second output terminal, the first sampling terminal samples the output voltage of the main circuit, the second sampling terminal samples the voltage of the resistor R1, the first output Terminal is connected to the main control circuit, and the second output terminal is connected to the switch S2.
  • the control switch S2 When the sub-control circuit detects that the output voltage of the main circuit exceeds a third preset value, the control switch S2 is turned off When it is detected that the voltage of the resistor R1 exceeds the fourth preset value, and at the same time it is detected that the output voltage of the main circuit exceeds the third preset value, the output voltage of the main circuit is controlled by controlling the main control circuit Lower, and control the switch tube S2 to close.
  • the output voltage V0 of the main circuit is detected by the sub-control circuit, and the switching tube S2 is controlled to be turned off.
  • the switching tube S2 By detecting the voltage of the resistor R1, the switching tube S2 is controlled to close, and the switching tube S2 is controlled to turn on and off to make the main circuit and the LED load.
  • the sub-control circuit controls the main control circuit , Through the main control circuit to control the main circuit to first reduce the no-load voltage output by the main circuit, then close the connection between the output of the main circuit and the LED load, and then adjust the no-load voltage output by the main circuit, thereby avoiding LED lights
  • the main control circuit controls the main control circuit to first reduce the no-load voltage output by the main circuit, then close the connection between the output of the main circuit and the LED load, and then adjust the no-load voltage output by the main circuit, thereby avoiding LED lights
  • the impedance of the resistor R1 is several or several tens of times the impedance of the LED load.
  • the sub-control circuit can better detect the LED load when detecting the voltage of resistor R1, and it is convenient to adjust the no-load output of the main circuit. Voltage.
  • the main control circuit includes a drive circuit, a photoelectric coupling circuit, and a voltage loop.
  • the input end of the voltage loop is connected to the output end of the main circuit, and the output end of the voltage loop is connected to the input end of the drive circuit.
  • the output terminal of the driving circuit is connected to the switch tube S1 via the photoelectric coupling circuit.
  • the rated value of the output voltage V0 of the main circuit is set through the voltage loop, the output voltage V0 of the main circuit is adjusted, and the drive circuit and the main circuit are electrically isolated through the photoelectric coupling circuit to effectively protect the circuit.
  • the voltage loop includes an operational amplifier US1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, and a switch tube S3.
  • the non-inverting input terminal of the operational amplifier US1 inputs the first voltage reference signal Vref1, so One end of the resistor R3 is connected to the output positive end of the main circuit, the other end of the resistor R3 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the negative phase input end of the operational amplifier US1 ,
  • the first end of the capacitor C1 and one end of the resistor R5 are connected, the second end of the capacitor C1 is connected to one end of the resistor R2, and the output end of the operational amplifier US1 is respectively connected to the other end of the resistor R2 and the driver
  • the input end of the circuit is connected, the other end of the R5 is grounded, the switch S3 is connected in parallel to the resistor R3, and the control end of the switch S3 is connected to the
  • the input signal of the negative phase end of the operational amplifier US1 is divided by the resistor R3, the resistor R4 and the resistor R5 to the output voltage Vo of the main circuit.
  • the input signal of the phase end and the first voltage reference signal Vref1 of the positive phase end are differentially amplified and output a feedback signal for transmission to the drive circuit.
  • the drive circuit outputs a drive signal through the photoelectric coupling circuit to control the switch tube S1 of the main circuit. On and off, the output voltage of the main circuit is controlled by the on and off of the switch tube S1.
  • the rated value of the output voltage V0 of the main circuit is set by the first voltage reference signal Vref1, the resistor R3, the resistor R4, and the resistor R5.
  • the switch tube S3 When the switch tube S3 receives When the output signal of the sub-control circuit closes, the set value of the output voltage V0 of the main circuit becomes smaller, and the first voltage reference signal Vref1 of the positive-phase input terminal of the operational amplifier US1 is combined with the input signal of the negative-phase input terminal. After the differential operation, the first feedback signal is output to the driving circuit, and the driving circuit outputs the driving signal to the main circuit, so that the output voltage V0 of the main circuit becomes smaller.
  • the switch S3 When the switch S3 receives the output signal of the sub-control circuit, it turns off When it is turned on, the set value of the output voltage V0 of the main circuit returns to the rated value, and the first feedback signal is output to the drive circuit after the differential operation of the first voltage reference signal Vref1 at the positive input terminal of the operational amplifier US1 and the input signal at the negative input terminal. , The drive circuit outputs the drive signal to the main circuit, so that the output voltage V0 of the main circuit returns to the rated value.
  • the voltage loop includes an operational amplifier US2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C2, and a switch tube S4, and one end of the resistor R7 is connected to the output terminal of the main circuit ,
  • the other end of the resistor R7 is connected to the negative input end of the operational amplifier US2, the first end of the capacitor C2, and one end of the resistor R8, and the second end of the capacitor C2 is connected to one end of the resistor R6, so
  • the output end of the operational amplifier US2 is respectively connected to the other end of the resistor R6 and the input end of the drive circuit, the other end of the resistor R8 is connected to the ground; one end of the resistor R9 inputs the second voltage reference signal Vref2, so The other end of the resistor R9 is connected to the non-inverting input end of the operational amplifier US2 as a common end, the common end is connected to one end of the
  • the other end of the resistor R10 is connected to one end of the switch tube S4, the other end of the switch tube S4 is connected to ground, and the control end of the switch tube S4 is connected to the sub-control circuit.
  • the input signal of the negative input terminal of the operational amplifier US2 is obtained by dividing the output voltage V0 of the main circuit by resistor R7 and resistor R8, and the input signal of the positive input terminal of the operational amplifier US2 is second
  • the voltage reference signal Vref2 is voltage-divided.
  • the operational amplifier US2 differentially amplifies the input signal at the negative phase terminal and the input signal at the positive phase terminal and outputs a second feedback signal to the drive circuit.
  • the driving circuit is made to output a driving signal to the main circuit, so that the output voltage V0 of the main circuit becomes smaller and returns to the rated value.
  • the sub-control circuit includes a comparator US3, a comparator US4, an RS flip-flop A1, an RS flip-flop A2, an RS flip-flop A3, an AND circuit AND, a first delay circuit and a second delay circuit.
  • the positive phase input terminal of the US3 is connected to the output terminal of the main circuit, the negative phase input terminal of the comparator US3 inputs the third voltage reference signal Vref3, and the output terminal of the comparator US3 is connected to the S of the RS flip-flop A1.
  • the Q terminal of the RS flip-flop A1 is connected to the input terminal of the first delay circuit and the R terminal of the RS flip-flop A3, respectively, the output terminal of the first delay circuit and the first input terminal of the AND circuit AND Connected, the positive phase input terminal of the comparator US4 inputs the voltage sampling value of the resistor R1, the negative phase input terminal of the comparator US4 inputs the fourth voltage reference signal Vref4, the output terminal of the comparator US4 and the AND circuit
  • the second input terminal of the AND is connected, the output terminal of the AND circuit AND is connected to the S terminal of the RS flip-flop A2, and the Q terminal of the RS flip-flop A3 is respectively connected to the R terminal of the RS flip-flop A1 and the RS flip-flop A2.
  • the R terminal of the RS flip-flop A3 is connected to the control terminal of the switch S2, the S terminal of the RS flip-flop A3 is connected to the output terminal of the second delay circuit, and the Q terminal of the RS flip-flop A2 is connected to the input terminal of the second delay circuit and The control terminal of the main control circuit is connected.
  • the output Q terminal When the R terminal of RS flip-flop A1, RS flip-flop A2, and RS flip-flop A3 receives a trigger, the output Q terminal is set low, when the S terminal receives a trigger, the output Q terminal is set high, and the first delay circuit and the second delay circuit pair the input The signal is delayed; when the LED load is disconnected when the LED driver is working normally, the voltage at the positive phase terminal of the comparator US3 is higher than the voltage at the negative phase terminal, and a high level is output to the R terminal of the trigger A1.
  • the Q terminal of A1 outputs a high level to the first delay circuit and the flip-flop A3.
  • the Q terminal When the R terminal of the flip-flop A3 receives a high level, the Q terminal outputs a low level VX2 to the switching tube S2, and the switching tube S2 is turned off. On, the main circuit is disconnected from the LED load; the first terminal of the AND gate is input with a high level.
  • the comparator US4 Since the LED load is unplugged, there is no voltage between the resistor R1 and the LED load, and the positive phase terminal of the comparator US4 is lower than the negative At the phase end, the comparator US4 outputs a low level, and the AND gate does not work; when the LED load is reconnected when the LED driver is working normally, the voltage rises to fourth because the LED load is reconnected to the resistor R1 Voltage reference signal Vref4, the positive phase terminal of the comparator US4 is higher than the negative phase terminal, the comparator US4 outputs a high level, and the AND gate AND operation outputs a high level to the S terminal of the flip-flop A2, and the Q terminal of the flip-flop A2 outputs The high level is applied to the second delay circuit and the switching tube S3 or the switching tube S4 of the voltage loop in the main control circuit.
  • the second delay circuit transmits the high level output by the flip-flop A2 to the S terminal of the flip-flop A3 after a delay, and the Q terminal of the flip-flop A3 outputs a high level to the R of the flip-flop A1 Terminal and the switching tube S2, the switching tube S2 is turned on, and at the same time the flip-flop A1 outputs a low level so that the AND gate outputs a low level, then the Q terminal of the flip-flop A2 outputs a low level, turning off the The switch tube S3 or the switch tube S4 of the voltage loop in the main control circuit, the output voltage V0 is restored to the rated value; it prevents the lamp flicker problem when the LED is plugged in under live conditions, and the no-load voltage of the driving power supply is greater than the LED load voltage. .
  • the present invention also provides a hot-pluggable LED drive power control method, including the following steps: S01: sampling the output voltage of the main circuit; S02: sampling the voltage of the resistor R1; S03: judging the output voltage of the main circuit Whether it exceeds the third voltage reference signal Vref3, if the judgment is yes, go to step S04, if the judgment is no, then go back to step S03; S04: turn off the switch S2; S05: judge whether the voltage of the resistor R1 exceeds the fourth voltage reference signal Vref4, when the judgment is yes, go to step S06, if the judgment is no, then go back to step S03; S06: reduce the output voltage of the main circuit; S07: close the switch S2; S08: increase the output voltage of the main circuit to the rated value.
  • the calculation formula of the rated value of the output voltage of the main circuit is:
  • V1 is the rated value of the output voltage of the main circuit.
  • the output voltage V0 of the main circuit decreases.
  • the output voltage V0 of the main circuit returns to the rated value.
  • the calculation formula of the rated value of the output voltage of the main circuit is:
  • Z1 is the parallel resistance value of the resistor R10 and the resistor R11
  • V3 is the voltage value input by the non-inverting input terminal of the operational amplifier US2
  • V1 is the rated output voltage of the main circuit.
  • the beneficial effects of the present invention are: by adding a switch tube S2, a resistor R1 and a sub-control circuit at the output end of the driving power supply, the switch tube S2 is first disconnected after the LED load is unplugged, so that the output of the driving power supply is disconnected from the LED load ;
  • reconnecting the LED load first reduce the output voltage of the drive power supply, and then close the switch S2, and then make the output voltage of the drive power return to the original output voltage after the switch S2 is closed, so as to realize the reconnection of the LED load
  • the LED lamp current starts to rise from a small value to the rated value, it is avoided that the LED lamp load is unplugged and reconnected when it is charged. Since the no-load voltage of the drive power supply is greater than the voltage of the LED lamp, in an instant There will be a problem of flashing lights.
  • Fig. 1 is a circuit block diagram of the LED driving power supply of the first embodiment.
  • Fig. 2 is a schematic diagram of the circuit connection of the voltage loop of the first embodiment.
  • Fig. 3 is a schematic diagram of the circuit connection of the voltage loop of the second embodiment.
  • Fig. 4 is a schematic diagram of the circuit connection of the sub-control circuit of the first embodiment.
  • Fig. 5 is a flowchart of a method for controlling an LED driving power supply of the present invention.
  • Main circuit In the figure 1. Main circuit, 2. Main control circuit, 3. Sub control circuit, 4. Drive circuit, 5. Voltage loop, 6. First delay circuit, 7. Second delay circuit, 8. LED load.
  • Embodiment 1 A hot-swappable LED drive power supply, as shown in Figure 1, includes a main circuit 1, a switch tube S2, a main control circuit 2, a sub-control circuit 3, and a resistor R1.
  • the main circuit 1 includes a switch tube S1 ,
  • the main circuit 1 processes the energy conversion of the power stage and supplies it to the LED load 8 under the control of the main control circuit 2; the input end of the main control circuit 2 is connected to the output end of the main circuit 1 for sampling the output voltage of the main circuit 1,
  • the control terminal of the main control circuit 2 is connected to the sub-control circuit 3, and the output terminal of the main control circuit 2 is connected to the control terminal of the switch tube S1; the switch tube S2 is connected in series between the main circuit 1 and the LED load 8, and the switch tube S2 is controlled
  • the terminal is connected to the sub-control circuit 3;
  • the resistor R1 is connected in parallel to the switch S2;
  • the sub-control circuit 3 includes a first sampling terminal, a second sampling terminal,
  • the first sampling terminal samples the main circuit 1
  • the second sampling terminal samples the voltage of the resistor R1, the first output terminal is connected to the main control circuit 2, the second output terminal is connected to the switch S2, the sub-control circuit detects that the output voltage of the main circuit exceeds the third preset value When it is detected that the voltage of the resistor R1 exceeds the fourth preset value and at the same time it is detected that the output voltage of the main circuit exceeds the third preset value, the output voltage of the main circuit is controlled by controlling the main control circuit Reduce and control the switch tube S2 to close.
  • the impedance of the resistor R1 is several or tens of times the LED load impedance.
  • the main control circuit 2 includes the drive circuit 4, the photoelectric coupling circuit and the voltage loop 5.
  • the input terminal of the voltage loop 5 and the main The output end of the circuit 1 is connected, the output end of the voltage loop 5 is connected to the input end of the drive circuit 4, and the output end of the drive circuit 4 is connected to the switch tube S1 via the photoelectric coupling circuit.
  • the voltage loop 5 includes an operational amplifier US1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, and a switch tube S3.
  • the non-inverting input terminal of the operational amplifier US1 inputs the first voltage reference signal Vref1, and the resistor
  • One end of R3 is connected to the output positive end of the main circuit 1
  • the other end of the resistor R3 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the negative input end of the operational amplifier US1, the first end of the capacitor C1 and the resistor R5.
  • the second end of the capacitor C1 is connected to one end of the resistor R2, the output end of the operational amplifier US1 is respectively connected to the other end of the resistor R2 and the input end of the driving circuit 4, the other end of R5 is grounded, and the switch S3 is connected in parallel to the resistor On R3, the control terminal of the switch S3 is connected to the sub-control circuit 3 as the control terminal of the main control circuit 2.
  • the sub-control circuit 3 includes a comparator US3, a comparator US4, an RS flip-flop A1, an RS flip-flop A2, an RS flip-flop A3, an AND circuit AND, a first delay circuit 6 and a second delay circuit 7.
  • the positive phase input terminal of the comparator US3 is connected to the output terminal of the main circuit 1, the negative phase input terminal of the comparator US3 inputs the third voltage reference signal Vref3, and the output terminal of the comparator US3 is connected to the S terminal of the RS flip-flop A1,
  • the Q terminal of the RS flip-flop A1 is connected to the input terminal of the first delay circuit 6 and the R terminal of the RS flip-flop A3, the output terminal of the first delay circuit 6 is connected to the first input terminal of the AND circuit AND, and the comparator US4
  • the positive phase input terminal of the comparator US4 receives the voltage sampling value of the resistor R1, the negative phase input terminal of the comparator US4 inputs the fourth voltage reference signal Vref4, the output terminal of the comparator US4 is connected with the second input terminal of the AND circuit AND, and the circuit
  • the output terminal of AND is connected to the S terminal of the RS flip-flop A2, the Q terminal of the RS flip-flop A3 is connected to the R terminal of the RS flip-
  • the voltage at the positive phase terminal of the comparator US3 is higher than the voltage at the negative phase terminal, and the high level is output to the R terminal of the trigger A1.
  • the Q terminal of A1 outputs a high level to the first delay circuit 6 and the trigger A3.
  • the Q terminal When the R terminal of the trigger A3 receives a high level, the Q terminal outputs a low level to the switching tube S2, the switching tube S2 is disconnected, and the main circuit 1 is disconnected from the LED load 8; the first terminal of the AND gate inputs a high level, because the LED load 8 is unplugged, and there is no voltage between the resistor R1 and the LED load 8, the positive phase terminal of the comparator US4 is lower than the negative phase terminal , The comparator US4 outputs a low level, and the AND gate does not work; when the LED load 8 is reconnected when the LED driver is working normally, because the LED load 8 is reconnected to the resistor R1, the voltage rises to the fourth The voltage reference signal Vref4, the positive phase terminal of the comparator US4 is higher than the negative phase terminal, the comparator US4 outputs a high level, and the AND gate AND works, and outputs a high level to the S terminal of the flip-flop A2 and the Q terminal of the flip-flop A2 Output high level to the second delay
  • the output voltage Vo of circuit 1 is divided into voltage.
  • operational amplifier US1 performs differential operational amplification between the input signal at the negative phase terminal and the first voltage reference signal Vref1 at the positive phase terminal and outputs the feedback signal for transmission
  • the driving circuit 4 controls the on-off of the switch tube S1 of the main circuit 1 through the photoelectric coupling circuit, and controls the output voltage of the main circuit 1 through the on-off of the switch tube S1, and the output voltage of the main circuit 1 is V0.
  • the rated value is set by the first voltage reference signal Vref1, resistor R3, resistor R4 and resistor R5.
  • the switch tube S3 When the switch tube S3 receives the output signal of the sub-control circuit 3 to make it closed, the set value of the output voltage V0 of the main circuit 1 changes Small, through the differential operation of the first voltage reference signal Vref1 at the positive input terminal of the operational amplifier US1 and the input signal at the negative input terminal, the first feedback signal is output to the drive circuit 4, and the drive circuit 4 outputs the drive signal to the main circuit 1, so that the main The output voltage V0 of the circuit 1 becomes smaller, and the second delay circuit 7 transmits the high level output by the flip-flop A2 to the S terminal of the flip-flop A3 after a delay, and the Q terminal of the flip-flop A3 outputs a high level to the R of the flip-flop A1.
  • the switch tube S2 is turned on, at the same time the trigger A1 outputs a low level so that the AND gate outputs a low level, then the Q terminal of the trigger A2 outputs a low level, disconnecting the voltage loop 5 in the main control circuit 2
  • the switch tube S3 and the resistor R3 are no longer short-circuited, and the output voltage V0 of the main circuit 1 returns to the rated value.
  • the first voltage reference signal Vref1 at the positive phase input terminal of the operational amplifier US1 and the input signal at the negative phase input terminal are output after the differential operation A feedback signal is sent to the drive circuit 4, and the drive circuit 4 outputs the drive signal to the main circuit 1, so that the main power
  • the output voltage V0 of circuit 1 returns to the rated value.
  • the switch tube S3 in this embodiment can also be connected in parallel to both ends of the resistor R4.
  • the second embodiment is a hot-swappable LED driving power supply.
  • the voltage loop 5 includes an operational amplifier US2, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C2, and Switch S4, one end of the resistor R7 is connected to the output end of the main circuit 1, the other end of the resistor R7 is respectively connected to the negative input end of the operational amplifier US2, the first end of the capacitor C2, and one end of the resistor R8.
  • the first end of the capacitor C2 The two ends are connected to one end of the resistor R6, the output end of the operational amplifier US2 is respectively connected to the other end of the resistor R6 and the input end of the drive circuit 4, the other end of the resistor R8 is connected to the ground; one end of the resistor R9 inputs the second voltage reference signal Vref2, the other end of resistor R9 is connected to the non-inverting input end of operational amplifier US2 as a common end, the common end is connected to one end of resistor R10 and resistor R11, the other end of resistor R11 is connected to ground, and the other end of resistor R10 is connected to the switch tube One end of S4 is connected, the other end of the switch S4 is connected to the ground, and the control end of the switch S4 is connected to the sub-control circuit 3.
  • this embodiment adjusts the input signal of the non-inverting input terminal of the operational amplifier US2 through whether the resistor R10 and the resistor R11 are connected in parallel, and the voltage signal has a larger adjustment range.
  • the switch S4 in this embodiment can also be connected in series with the resistor R11.
  • FIG. 5 it is a hot-swappable LED drive power control method of the present invention, including the following steps: S01: sampling the output voltage of the main circuit 1; S02: sampling the voltage of the resistor R1; S03: judging the main Whether the output voltage of circuit 1 exceeds the third voltage reference signal Vref3, if the judgment is yes, go to step S04, if the judgment is no, then go back to step S03; S04: turn off the switch S2; S05: judge whether the voltage of the resistor R1 exceeds the first Four voltage reference signal Vref4, when the judgment is yes, go to step S06, if judgment is no, then go back to step S03; S06: reduce the output voltage of the main circuit 1; S07: close the switch S2; S08: increase the output voltage of the main circuit 1 To the rated value.
  • the calculation formula of the rated value of the output voltage of the main circuit 1 is:
  • V1 is the rated value of the output voltage of the main circuit 1.
  • the calculation formula of the rated value of the output voltage of the main circuit 1 is:
  • Z1 is the parallel resistance value of the resistor R10 and the resistor R11
  • V3 is the voltage value input by the non-inverting input terminal of the operational amplifier US2
  • V1 is the rated value of the output voltage of the main circuit 1.

Abstract

La présente invention concerne une alimentation en puissance de pilotage de DEL connectable sous tension et un procédé de commande associé. Ladite alimentation en puissance de pilotage comprend : un circuit principal, un transistor de commutation S2, un circuit de commande principal, un sous-circuit de commande et une résistance R1 ; le circuit principal comprend un transistor de commutation S1, et le circuit principal traite une conversion d'énergie de niveau de puissance sous la commande du circuit de commande principal 2 et la fournit à une charge de DEL 8 ; une extrémité d'entrée du circuit de commande principal 2 est connectée à une extrémité de sortie du circuit principal 1, une extrémité de commande du circuit de commande principal 2 est connectée au sous-circuit de commande 3, et une extrémité de sortie du circuit de commande principal 2 est connectée à une extrémité de commande du transistor de commutation S1 ; le transistor de commutation S2 est connecté en série entre le circuit principal 1 et la charge de DEL 8, et une extrémité de commande du transistor de commutation S2 est connectée au sous-circuit de commande 3 ; et la résistance R1 est connectée en parallèle au transistor de commutation S2. Selon la présente invention, le transistor de commutation S2, la résistance R1 et le sous-circuit de commande sont ajoutés à l'extrémité de sortie de l'alimentation en puissance de pilotage, ce qui permet d'éviter le problème de clignotement provoqué par la tension sans charge délivrée par l'alimentation en puissance de pilotage ayant un niveau supérieur à celui de la tension d'une lampe à DEL dans des cas dans lesquels la charge de lampe à DEL est débranchée tout en étant alimentée et est rebranchée tout en étant alimentée.
PCT/CN2020/096928 2019-12-16 2020-06-19 Alimentation en puissance de pilotage de del connectable sous tension et procédé de commande associé WO2021120561A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911294645.X 2019-12-16
CN201911294645.XA CN111065184B (zh) 2019-12-16 2019-12-16 一种可热插拔的led驱动电源及其控制方法

Publications (1)

Publication Number Publication Date
WO2021120561A1 true WO2021120561A1 (fr) 2021-06-24

Family

ID=70301115

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/096928 WO2021120561A1 (fr) 2019-12-16 2020-06-19 Alimentation en puissance de pilotage de del connectable sous tension et procédé de commande associé

Country Status (2)

Country Link
CN (1) CN111065184B (fr)
WO (1) WO2021120561A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111065184B (zh) * 2019-12-16 2021-12-28 杭州优特电源有限公司 一种可热插拔的led驱动电源及其控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103037585A (zh) * 2012-12-21 2013-04-10 深圳桑达百利电器有限公司 一种分体式led灯具及其驱动电源插拔保护电路
CN104254167A (zh) * 2013-06-28 2014-12-31 欧普照明股份有限公司 一种led照明电路
CN105633911A (zh) * 2015-12-30 2016-06-01 生迪智慧科技有限公司 Led装置的保护电路及方法
US20170265287A1 (en) * 2015-01-06 2017-09-14 Cmoo Systems Ltd. Method and Apparatus for Power Extraction in a Pre-Existing AC Wiring Infrastructure
CN111065184A (zh) * 2019-12-16 2020-04-24 毛昭祺 一种可热插拔的led驱动电源及其控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6771478B2 (en) * 2000-12-22 2004-08-03 Ixys Corporation Hot-swap protection circuit
CN102752912B (zh) * 2012-06-01 2015-11-25 台达电子企业管理（上海）有限公司 一种led驱动电路
CN105960055B (zh) * 2014-01-28 2017-08-08 杰华特微电子（杭州）有限公司 一种用于led照明器的热插拔保护电路
CN105356735B (zh) * 2015-10-15 2018-01-16 无锡华润矽科微电子有限公司 一种减小输出电压过冲的开路保护电路
CN105680679B (zh) * 2016-01-25 2018-10-02 浙江凯耀照明股份有限公司 驱动器输出过流保护电路及其保护方法
CN106877278B (zh) * 2016-12-28 2019-04-09 武汉智能控制工业技术研究院有限公司 一种基于负载检测的电路过载保护系统及保护方法
CN206674257U (zh) * 2017-04-07 2017-11-24 深圳迈睿智能科技有限公司 一种支持热插拔的led电源及led灯具

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103037585A (zh) * 2012-12-21 2013-04-10 深圳桑达百利电器有限公司 一种分体式led灯具及其驱动电源插拔保护电路
CN104254167A (zh) * 2013-06-28 2014-12-31 欧普照明股份有限公司 一种led照明电路
US20170265287A1 (en) * 2015-01-06 2017-09-14 Cmoo Systems Ltd. Method and Apparatus for Power Extraction in a Pre-Existing AC Wiring Infrastructure
CN105633911A (zh) * 2015-12-30 2016-06-01 生迪智慧科技有限公司 Led装置的保护电路及方法
CN111065184A (zh) * 2019-12-16 2020-04-24 毛昭祺 一种可热插拔的led驱动电源及其控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DAL LAGO M.; MENEGHINI M.; TRIVELLIN N.; MURA G.; VANZI M.; MENEGHESSO G.; ZANONI E.: ""Hot-plugging" of LED modules: Electrical characterization and device deg", MICROELECTRONICS RELIABILITY : AN INTERNAT. JOURNAL & WORLD ABSTRACTING SERVICE, ELSEVIER SCIENCE LTD., GB, vol. 53, no. 9, 1 January 1900 (1900-01-01), GB, pages 1524 - 1528, XP028741711, ISSN: 0026-2714, DOI: 10.1016/j.microrel.2013.07.054 *

Also Published As

Publication number Publication date
CN111065184A (zh) 2020-04-24
CN111065184B (zh) 2021-12-28

Similar Documents

Publication Publication Date Title
KR102259113B1 (ko) 충전 회로, 단말 및 충전 시스템
CN102752912B (zh) 一种led驱动电路
CN109588779A (zh) 电子雾化设备及其防干烧控制装置
WO2018068323A1 (fr) Chargeur
CN100592237C (zh) 智能开关电源功率检测及控制装置
TWI495238B (zh) 於不同負載均能維持高轉換效率的電源供應系統
CN101226411B (zh) 音响系统开关电源的功耗测控方法及其专用装置
WO2021120561A1 (fr) Alimentation en puissance de pilotage de del connectable sous tension et procédé de commande associé
JP2013509691A (ja) ランプ用電子バラスト回路
WO2021175059A1 (fr) Appareil de commande de frein électromagnétique
JP2004312995A (ja) 負荷の電力消費の調整方法、負荷の電力消費の調整回路およびランプ用の電気点灯装置
CN106332376A (zh) 纹波消除电路及led控制电路
CN102611316B (zh) 一种反激变换器控制恒流输出电路
CN106658838A (zh) 照明装置、控制芯片、线性调光系统及线性调光方法
CN111436174A (zh) 一种高效恒流驱动电源设备
TW201424222A (zh) 供電控制裝置
CN208692306U (zh) 电子雾化设备及其防干烧控制装置
CN206481218U (zh) 一种电源电路
CN201307764Y (zh) 一种具有过压保护功能的电源电路
CN110165649A (zh) 电源输出泄放电路及电源系统
CN104253535A (zh) 无高压电解电容器的电源供应器
CN207460007U (zh) 一种反激有源钳位电路
CN109379806A (zh) 一种调光驱动电路、调光控制器和led灯具
TW202002480A (zh) 開關電源中電流感測端的短路保護系統
TW201909526A (zh) 低相位突波保護器

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: 20901686

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: 20901686

Country of ref document: EP

Kind code of ref document: A1