WO2005076447A1 - スイッチング電源装置 - Google Patents
スイッチング電源装置 Download PDFInfo
- Publication number
- WO2005076447A1 WO2005076447A1 PCT/JP2004/016529 JP2004016529W WO2005076447A1 WO 2005076447 A1 WO2005076447 A1 WO 2005076447A1 JP 2004016529 W JP2004016529 W JP 2004016529W WO 2005076447 A1 WO2005076447 A1 WO 2005076447A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- switch element
- switching
- power supply
- transformer
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 13
- 230000001960 triggered effect Effects 0.000 abstract description 5
- 101000821827 Homo sapiens Sodium/nucleoside cotransporter 2 Proteins 0.000 description 20
- 102100021541 Sodium/nucleoside cotransporter 2 Human genes 0.000 description 20
- 238000010586 diagram Methods 0.000 description 20
- 238000004804 winding Methods 0.000 description 20
- 101000685663 Homo sapiens Sodium/nucleoside cotransporter 1 Proteins 0.000 description 19
- 102100023116 Sodium/nucleoside cotransporter 1 Human genes 0.000 description 19
- 239000003990 capacitor Substances 0.000 description 16
- 238000009499 grossing Methods 0.000 description 15
- 230000010355 oscillation Effects 0.000 description 8
- 101000822028 Homo sapiens Solute carrier family 28 member 3 Proteins 0.000 description 7
- 102100021470 Solute carrier family 28 member 3 Human genes 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
-
- 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
- H02M3/01—Resonant DC/DC converters
Definitions
- the present invention relates to a control method for a switching power supply including a plurality of switching elements, and more particularly to a control method that does not require an oscillation circuit.
- a control method of a switching element in a switching power supply generally, a PWM (
- PW Pulse Wide Modulation
- PFM Pulse Frequency Modulation
- the PWM method is a method of controlling an on-period ratio of a switch element to a switching cycle, and the switching cycle is generally constant.
- the relation of the on-time ratio in each switch element is the same or an inverse number.
- the PFM method is a method for controlling a switching frequency, and generally, the ON period ratio of a switch element is constant.
- the relation between the on-time ratio and the switching frequency in each switch element is the same.
- Non-Patent Document 1 Electrical Engineering Handbook (6th edition) Published by The Institute of Electrical Engineers of Japan, February 20, 2001, Volume 20, Chapter 9, Section 2 Switching Regulator, p851-852
- the control to stabilize the output voltage by changing the on-period of the reference switch element has been performed.
- the condition of the force control is that one output voltage is maintained at a constant voltage. , T, and only one condition.
- An object of the present invention is to solve the problem of inconvenience caused by simultaneous turning on of a plurality of switch elements, to enable a plurality of conditions to be controlled to satisfy a predetermined condition, and to eliminate the need for a reference oscillation circuit. And a switching power supply device.
- the switching power supply of the present invention includes an inductor or a transformer, and a plurality of switch elements for switching a current flowing through the inductor or the transformer, and power is supplied by turning on and off these switch elements.
- the next switch element is turned on in response to a change in voltage or current generated when the on-state switch element is turned off, and the switch elements are sequentially turned on and off in a chain.
- a switching control circuit that periodically repeats the series of ON / OFF operations of the switch elements, determines the ON period of each switch element under independent conditions for each switch element, and controls the ON period of each switch element. It is characterized by having.
- the switching power supply of the present invention is characterized in that, during the on-period of two continuous switch elements among the plurality of switch elements in (1), the two switch elements are both turned off. A dead time is formed, and the dead time is formed by a delay time from when an on-state switch element is turned off to when a next-order switch element is turned on.
- the switching power supply according to the present invention is characterized in that, in (2), the power supply at both ends of the switch element is provided.
- the dead time is set so that the switch element is turned on after the voltage has decreased to or near zero voltage.
- the switching power supply device of the present invention is characterized in that, in (1)-(3), using a voltage generated in the inductor or the transformer by turning off a switch element in an on state among a plurality of switch elements, It is characterized in that the next switch element is turned on.
- the switching power supply of the present invention is characterized in that in (1) to (4), the switching control circuit detects an output voltage to a load and determines the ON period according to the output voltage.
- the switching control circuit detects a change or polarity of a voltage generated in the inductor or the transformer to determine the ON period. It is characterized by:
- the switching power supply device of the present invention is characterized in that in (1) to (4), the switching control circuit detects a current flowing through the inductor or the transformer to determine the ON period. .
- the switching power supply of the present invention is characterized in that in (1) to (4), the switching control circuit determines the on-period by detecting a voltage between both ends of the switch element. I have.
- the switching power supply of the present invention is characterized in that, in (1) to (4), the switching control circuit detects the current flowing through the switch element to determine the ON period.
- the switching control circuit may be configured so that a current flowing through the switch element becomes zero or near zero and the switch element is turned off so that the switch element is turned off. It is characterized in that the ON period is determined.
- the next switch element is turned on when the switch element in the on state is turned off. Therefore, in principle, a problem occurs in which two switch elements are simultaneously turned on. Therefore, the reliability of the switching power supply device is improved.
- the output is stabilized by changing the ON period of the reference switching element.
- two or more conditions can be satisfied by the number of switch elements at the maximum.
- the switching frequency is determined by the accumulation of the ON pulses of the switch elements, and setting the ON period of each switch element eliminates the need for an oscillation circuit.
- a dead time due to the on / off delay time of the switching element is formed between the on-periods of two consecutive switching elements among the plurality of switching elements, and the plurality of switching elements are Simultaneously turning on improves the reliability of the switching power supply.
- the dead time is set by the delay time before turning on, it is easy to appropriately set the dead time, and the on-period of each switch element changes to change the switching frequency and the on-time ratio.
- the power conversion efficiency can be maintained high because the dead time does not become longer or shorter than necessary.
- the switch element is turned on after the voltage across the switch element drops to or near zero voltage, so that the switching is performed by the zero voltage switching operation of turning on at zero voltage. Loss can be greatly reduced and high efficiency can be achieved.
- a switching control circuit for turning on the next switch element by using a voltage generated in an inductor or a transformer by turning off one of the plurality of switch elements that is on is used.
- a voltage signal generated from the inductor or the transformer can be easily extracted as a trigger signal, and can be used as a voltage for driving the switch element, so that the circuit configuration can be simplified.
- the constant voltage power supply device can be easily configured by detecting the output voltage to the load and determining the ON period according to the voltage.
- a change in voltage (falling or rising) or polarity generated in the transformer is detected to determine the ON period of the switch element, so that a transformer power is also generated.
- Voltage signal can be easily used as a trigger signal, and the circuit configuration can be simplified.
- the ON period is determined by detecting a current flowing through the transformer.
- the conduction time of the rectifier diode can be made equal to the ON period of the switch element, and the peak value and the effective current of the current flowing through the rectifier diode and the transformer can be reduced to reduce conduction loss.
- the ON state and the OFF state of the switch element can be reliably determined. It can be easily used as a trigger signal.
- the switching control circuit can control the switch element by reliably determining the state of the switch element by detecting the current flowing through the switch element and determining the ON period. , A necessary and sufficient dead time can be formed.
- the switching control circuit is configured so that the current flowing through the switch element becomes zero or near zero, and the switch element is turned off. By the operation, the switching loss can be significantly reduced and high efficiency can be achieved.
- FIG. 1 is a circuit diagram and a waveform diagram of a switching power supply device according to a first embodiment.
- FIG. 2 is a circuit diagram and a waveform diagram of a switching power supply device according to a second embodiment.
- FIG. 3 is a circuit diagram and a waveform diagram of a switching power supply device according to a third embodiment.
- FIG. 4 is a circuit diagram and a waveform diagram of a switching power supply device according to a fourth embodiment.
- FIG. 5 is a circuit diagram and a waveform diagram of a switching power supply device according to a fifth embodiment. Explanation of symbols
- FIG. 1 (A) is a circuit diagram of a switching power supply device
- FIG. 1 (B) is a diagram showing waveforms and timing relationships of respective parts.
- Vi is an input power supply
- T is a transformer
- the first switch element Q 1 is connected to the primary winding Lp.
- a first rectifying / smoothing circuit including a rectifying diode Ds1 and a smoothing capacitor C1 is provided on the secondary winding Ls of the transformer.
- a second rectifying / smoothing circuit including the rectifying diode Ds2, the second switch element Q2, and the second smoothing capacitor C2 is configured.
- a third rectifying / smoothing circuit including a rectifying diode Ds3, a third switch element Q3, and a third smoothing capacitor C3 is configured.
- the first switching control circuit CNT1 is an ON / OFF control of the first switch element Q1
- the second switching control circuit CNT2 is an ON / OFF control of the second switch element Q2
- the third switching control circuit CNT3 is a third switching control circuit CNT3.
- the on / off control of the switching element Q3 is performed.
- the broken lines entering the switching control circuits CNT1, CNT2, and CNT3 indicate the trigger path, The lines schematically represent the feedback paths! /, Respectively.
- the first switching control circuit CNT1 inputs the voltage of the transformer T (transformer voltage Vt) as a trigger and turns on Q1 at the falling timing of the drain voltage of Q1. . Also, the output voltage Vol of the first output terminal OUT1 is detected, and the ON period of the first switch element Q1 is determined so that Vol becomes a predetermined voltage. That is, Q1 is turned off at the timing when the ON period of Q1 is a necessary time.
- the second switching control circuit CNT2 inputs the voltage of the transformer T (transformer voltage) Vt as a trigger, and turns on the second switch element Q2 at the inversion timing of the voltage of the transformer T (transformer voltage Vt). Let it. Then, the voltage Vo2 of the second output terminal OUT2 is detected, and the ON period of the second switch element Q2 is determined so that Vo2 becomes a predetermined voltage. That is, Q2 is turned off at the timing when the ON period of Q2 is a necessary time.
- the third switching control circuit CNT3 inputs the drain voltage of the second switch element Q2 as a trigger, and turns on Q3 at the rising timing of the drain voltage of Q2. Then, the voltage Vo3 of the third output terminal OUT3 is detected, and the ON period of the third switch element Q3 is determined so that Vo3 becomes a predetermined voltage. That is, Q3 is turned off at the timing when the ON period of Q3 is the required time.
- Vt is the voltage of the transformer T (transformer voltage)
- Ql, Q2, Q3, and Ds are the first to third switch elements Q1 to Q3 and the first rectifier, respectively.
- the state of the diode Dsl is shown. Here, the noise level is in the ON state, and the low level is in the OFF state.
- the gate voltage of the first switch element Q1 becomes high level by the first switching control circuit CNT1 after a delay time Atdl from that timing. , Q1 turns on.
- This delay time Atdl is set according to the resonance period determined by the inductance on the primary side of the transformer T, the parasitic capacitance between the drain and source of Q1, and the time when the drain-source voltage of Q1 becomes zero. It is set to turn on by switching, which causes zero voltage switching operation of Q1 and greatly reduces switching loss.
- the first switching control circuit CNT1 outputs the voltage Vol of the first output terminal OUT1.
- the on-period tonl of Ql is determined so that the voltage of Vl becomes a predetermined value. That is, the gate voltage of Ql is set to the low level at time tl at which Atdl + tonl has elapsed from time to. This turns off Q1.
- the excitation energy of the transformer T is determined by the ON period tonl of Q1, and consequently, the voltage of Vol.
- the second switching control circuit CNT2 receives the voltage of the secondary winding Ls of the transformer T as a trigger signal, and sets the gate voltage of the second switch element Q2 to a low level at the inversion timing tl of the transformer voltage Vt. Therefore, Q2 turns on after this timing tl force also delay time Atd2.
- the delay time Atd2 is set according to the resonance period determined by the secondary inductance of the transformer T and the parasitic capacitance between the drain and source of Q2, and is turned on when the drain-source voltage of Q2 becomes zero. This causes the zero voltage switching operation of Q2.
- the second switching control circuit CNT2 determines the ON period ton2 of Q2 so that the voltage Vo2 at the second output terminal OUT2 has a predetermined value. That is, the gate voltage of Q2 is set to the low level at time t2 when Atd2 + ton 2 has elapsed from time tl.
- the third switching control circuit CNT3 receives the drain voltage of Q2 as a trigger signal, when Q2 is turned off at t2, the third switch element Q3 is turned on after the timing force delay time Atd3.
- This delay time Atd3 is set according to the resonance period determined by the inductance on the secondary side of the transformer T, the parasitic capacitance between the drain and source of Q3, and the timing at which the drain-source voltage of Q3 becomes zero. It is set to turn on, which causes zero voltage switching of Q3.
- the third switching control circuit CNT3 determines the ON period ton3 of Q3 so that the voltage Vo3 at the third output terminal OUT3 has a predetermined value. That is, at time t3 when Atd3 + ton 3 has elapsed from time t2, the gate voltage of Q2 is set to low level.
- the first switching control circuit CNT1 determines the on-period tond of the rectifier diode Dsl so that the voltage Vol of the first output terminal OUT1 becomes a predetermined value, and the current of Dsl becomes 0,
- the voltage of the transformer is inverted at time to. That is, when Atd4 + tond elapses from time t3, Dsl turns off, and the first switching control circuit CNT1 sets the gate voltage of the first switch element Q1 to the high level after the time to force is also delayed by Atddl. To This timing to is the same as the first to.
- predetermined voltages Vol, Vo2, and Vo3 can be respectively obtained at the first to third output terminals OUT1 to OUT3. it can.
- the on / off state of each switching element changes in the order of lapse of time in accordance with causality because the next switch element is turned on in tandem with the turning on of the on state switch element. Then, a delay time is inevitably entered until the switch element in the ON state is turned off and the next switch element is turned on, so that the delay time is formed as a dead time.
- a problem that the two switch elements are turned on at the same time does not occur in principle, and the reliability of the switching power supply device is improved.
- the dead time By properly setting the dead time, the zero voltage switching operation can be performed, and the power conversion efficiency can be maintained at a high level without becoming longer than necessary.
- the voltages of a plurality of outputs (three outputs in the first embodiment) corresponding to the number of switch elements can be independently stabilized.
- the condition is such that the voltages of the plurality of output terminals each become a predetermined value.
- the element can be controlled by the on-period of the switch element, current control other than voltage control is also possible. That is, independent conditions corresponding to the number of switch elements can be satisfied.
- the current flowing through the force switch element that detects the turn-off of the first and second switch elements Q2 and Q3 by the drain voltage of Q2 and Q3 is detected, and the On-off may be detected.
- a force for detecting the transformer voltage from the voltage of the secondary winding Ls of the transformer T is used to detect a change in the transformer voltage based on the voltage of the primary winding Lp. It may be.
- a change in the polarity of the transformer voltage may be detected.
- FIG. 2A is a circuit diagram of the switching power supply device
- FIG. 2B is a diagram showing waveforms and timing relationships of respective parts.
- an inductor Lr is connected to a primary winding Lp of a transformer T.
- a second switch element Q2 and a capacitor Cr are provided so as to form a closed loop with the inductor Lr and the primary winding Lp of the transformer T.
- a rectifying and smoothing circuit consisting of a rectifying diode Ds and a smoothing capacitor Co is connected to the secondary winding Ls of the transformer T.
- the first switching control circuit CNT1 performs on / off control of the first switch element Q1
- the second switching control circuit CNT2 performs on / off control of the second switch element Q2.
- a broken line entering the switching control circuits CNT1 and CNT2 schematically shows a trigger path
- a solid line schematically shows a feedback path.
- the first switching control circuit CNT1 inputs the rising and reversing timing of the voltage of the transformer T (transformer voltage) as a trigger. Further, it detects the output voltage Vo and controls the ON period of the first switch element Q1 so that Vo becomes a predetermined voltage.
- the second switching control circuit CNT2 receives a trigger at the falling inversion timing of the transformer voltage of the transformer T as a trigger. Also, the voltage vc across the capacitor Cr is detected, and the ON period of Q2 is controlled so that vc becomes a predetermined voltage or does not exceed the predetermined voltage.
- Vt indicates the waveform of the transformer voltage
- Q1 and Q2 indicate the states of the first and second switch elements Ql and Q2, respectively.
- the high level is in the on state
- the low level is in the off state.
- the gate voltage of Q1 is set to a high level after a predetermined delay time Atl. This turns on Q1. Since the output voltage Vo changes according to the ON period tonl of the first switch element Q1, tonl is determined so as to obtain a predetermined output voltage Vo. That is, when At 1 + tonl has elapsed from time to, the gate voltage of the first switch element Ql is set to the low level to turn on Q1.
- the second switching control circuit CNT2 sets the gate voltage of Q2 to the high level after the delay time At2, triggered by the inversion timing of the transformer voltage Vt. This turns on the second switch element Q2.
- ton2 Since the voltage vc across the capacitor Cr changes according to the ON period ton2 of Q2, ton2 is determined so that vc becomes a predetermined voltage. That is, when At2 + ton2 has elapsed from time tl, the second switching control circuit CNT2 sets the gate voltage of Q2 to low level. This turns off Q2.
- the cycle T shown in FIG. 2B is repeated as one cycle, thereby acting as a voltage clamp type flyback converter.
- the output voltage Vo to the load is kept constant.
- the voltage vc across the capacitor Cr is controlled to be a stable voltage.
- the forces Vo and Vc that were used when operating as a constant-voltage power supply device are detected to determine the on-periods tonl and ton2 of the two switch elements Ql and Q2, respectively.
- the two voltages Vo and vc can be controlled so as to satisfy predetermined conditions.
- the first and second switching control circuits CNTl and CNT2 are turned off for Ql and Q2.
- the voltage generated in the inductor Lr may be detected more.
- FIG. 3 (A) is a circuit diagram of the switching power supply device
- FIG. 3 (B) is a diagram showing a waveform and timing relationship of each part.
- a tertiary winding Lt of the transformer T is provided, and a rectifying and smoothing circuit including a rectifying diode Ds2 and a smoothing capacitor C2 is connected to the tertiary winding Lt.
- the second switching control circuit CNT2 detects the output voltage Vo2 of the second output terminal OUT2 and performs feedback control.
- Other configurations are the same as those of the second embodiment, and this switching power supply device operates as a voltage clamp type flyback converter.
- the first and second switching control circuits CNT1 and CNT2 control the ON and ton periods tonl and ton2 of the first and second switch elements Ql and Q2.
- Output voltages Vol and Vo2 can be maintained at predetermined voltages.
- FIG. 4 (A) is a circuit diagram of the switching power supply device
- FIG. 4 (B) is a diagram showing a waveform and timing relationship of each part.
- the first switch element Q1 and the capacitor Crl are connected so as to form a closed loop together with the inductor Lr and the primary winding Lp of the transformer T.
- the first and second switch elements Ql and Q2 are connected in series, and the second switch element Q2 and the capacitor Cr2 are connected so as to form another closed loop together with Lr and Lp.
- Rectifier diodes Dsl and Ds2 are connected to the secondary windings Lsl and Ls2 of the transformer T, respectively, to form a rectifier / smoothing circuit together with the smoothing capacitor Co.
- the first switching control circuit CNT1 inputs the rising timing of the voltage of the transformer T (transformer voltage) as a trigger. Further, it detects the output voltage Vo and controls the ON period of the first switch element Q1 so that Vo becomes a predetermined voltage.
- the second switching control circuit CNT2 inputs the falling timing of the transformer voltage of the transformer T as a trigger. Further, the transformer voltage Vt of the transformer T is detected, and when Vt becomes 0, Q2 is turned on. In FIG. 4B, Vt is the waveform of the transformer voltage, and it is the waveform of the current flowing through the primary winding Lp of the transformer T. Ql and Q2 indicate the states of the first and second switch elements Ql and Q2, respectively. Here, the noise level is in the ON state, and the low level is in the OFF state.
- the first switching control circuit CNT1 sets the gate voltage of Q1 to the noy level, and Q1 turns on. I do.
- the ON period tonl of Q1 is determined so that the output voltage Vo becomes a predetermined voltage. That is, the gate voltage of Q1 is set to the low level when Atl + tonl has elapsed from time to. This turns off Q1.
- the second switching control circuit CNT2 sets the gate voltage of Q2 to the high level after the delay time At2 triggered by the fall timing of the transformer voltage Vt. This turns on the second switch element Q2
- the second switching control circuit CNT2 sets the gate voltage of Q2 to low level. From this, Q2 turns off.
- the cycle T shown in FIG. 4B is repeated as one cycle, thereby acting as a current resonance type half-bridge converter.
- FIG. 5 (A) is a circuit diagram of a switching power supply device
- FIG. 5 (B) is a diagram showing a waveform and timing relationship of each part thereof.
- the second switching control circuit CNT2 detects the current is flowing in the secondary winding Ls of the torus T and determines the ON period ton2 of the second switch element Q2.
- Vt is the waveform of the transformer voltage, and is is the waveform of the current flowing through the secondary winding Ls of the transformer T.
- Ql and Q2 indicate the states of the first and second switch elements Ql and Q2, respectively.
- the noise level is in the ON state, and the low level is in the OFF state.
- the first switching control circuit CNT1 sets the gate voltage of the first switch element Q1 to a high level, and turns on Q1 after a delay time of ⁇ tl from the time when the current is becomes 0.
- the first switching control circuit CNT1 determines the ON period tonl of Q1 so that the output voltage Vo becomes a predetermined voltage, and turns off Q1 at time tl.
- the transformer voltage Vt is inverted, and the second switching control circuit CNT2 triggers it to delay At2, and thereafter, sets the gate voltage of the second switch element Q2 to the low level. This turns on Q2.
- the second switching control circuit CNT2 sets the gate voltage of Q2 to a low level by using the trigger as a trigger to turn off Q2. This determines the ON period ton2 of Q2. This timing is the first timing to described above.
- the second switch element Q2 when the secondary winding current is becomes 0, the second switch element Q2 is turned off, so that the conduction time of the rectifier diode Ds is equal to the on period of Q2.
- the transistor can be turned off when the current flowing through Q2 is 0, the zero current switching operation is performed, and the switching loss can be greatly reduced.
- the peak value and the effective current of the current is flowing through the switch element Q2, the rectifier diode Ds and the transformer T can be reduced, and the conduction loss can be reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800026044A CN1742423B (zh) | 2004-02-03 | 2004-11-08 | 开关电源单元 |
JP2005517620A JP4238872B2 (ja) | 2004-02-03 | 2004-11-08 | スイッチング電源装置 |
GB0515435A GB2428142B (en) | 2004-02-03 | 2004-11-08 | Switching power supply |
US10/541,374 US7821239B2 (en) | 2004-02-03 | 2004-11-08 | Switching power supply |
TW093136722A TWI248625B (en) | 2004-02-03 | 2004-11-29 | Switching power supply |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004027036 | 2004-02-03 | ||
JP2004-027036 | 2004-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005076447A1 true WO2005076447A1 (ja) | 2005-08-18 |
Family
ID=34835876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016529 WO2005076447A1 (ja) | 2004-02-03 | 2004-11-08 | スイッチング電源装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7821239B2 (ja) |
JP (1) | JP4238872B2 (ja) |
KR (1) | KR100632687B1 (ja) |
CN (1) | CN1742423B (ja) |
GB (1) | GB2428142B (ja) |
TW (1) | TWI248625B (ja) |
WO (1) | WO2005076447A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010119761A1 (ja) | 2009-04-14 | 2010-10-21 | 株式会社村田製作所 | スイッチング電源装置 |
WO2010119760A1 (ja) | 2009-04-14 | 2010-10-21 | 株式会社村田製作所 | スイッチング電源装置 |
JP2013510543A (ja) * | 2009-11-06 | 2013-03-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 零電圧スイッチングコンバータのためのフィードバック回路 |
US9548662B2 (en) | 2010-12-02 | 2017-01-17 | Murata Manufacturing Co., Ltd. | Switching power-supply circuit |
US9621048B2 (en) | 2010-12-02 | 2017-04-11 | Murata Manufacturing Co., Ltd. | Switching power-supply circuit |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8064229B2 (en) * | 2008-11-11 | 2011-11-22 | Semiconductor Components Industries, Llc | Method of forming a series resonant switching power supply control circuit and structure therefor |
US8451628B2 (en) * | 2010-04-01 | 2013-05-28 | Analog Devices, Inc. | Switching converter systems with isolating digital feedback loops |
US20120086426A1 (en) * | 2010-10-12 | 2012-04-12 | Apple Inc. | Single-inductor multiple-output power supply with default path |
DE102010062685A1 (de) * | 2010-12-09 | 2012-06-14 | Siemens Aktiengesellschaft | Resonanzwandler |
DE102012000683B4 (de) * | 2012-01-17 | 2013-08-14 | Phoenix Contact Gmbh & Co. Kg | Mehrkanalig geregelter DC/DC-Wandler zur redundanten Spannungsversorgung in der Sicherheitstechnik |
DE102012219365A1 (de) * | 2012-10-23 | 2014-04-24 | Schmidhauser Ag | Gleichspannungswandler |
CN103701332A (zh) * | 2013-12-23 | 2014-04-02 | 南宁广开电气有限责任公司 | 一种基于pwm的智能电力变压器 |
US9954447B2 (en) * | 2016-01-13 | 2018-04-24 | Lite-On Electronics (Guangzhou) Limited | Power supply apparatus |
JP2020018037A (ja) * | 2018-07-23 | 2020-01-30 | 株式会社デンソー | パワー素子駆動装置 |
US11616449B2 (en) | 2020-04-03 | 2023-03-28 | Delta Electronics (Shanghai) Co., Ltd | Power adapter |
CN211579860U (zh) | 2020-04-03 | 2020-09-25 | 台达电子企业管理(上海)有限公司 | 电源适配器 |
CN113497564B (zh) | 2020-04-03 | 2023-08-18 | 台达电子企业管理(上海)有限公司 | 电源适配器及其控制方法 |
US11863084B2 (en) * | 2021-09-22 | 2024-01-02 | Apple Inc. | Multiplex control for multi-port AC/DC adapter with chopper |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02262825A (ja) * | 1988-09-21 | 1990-10-25 | Fuji Electric Co Ltd | 半導体チョッパ装置の制御回路 |
WO2001003277A2 (en) * | 1999-07-07 | 2001-01-11 | Synqor, Inc. | Control of dc/dc converters having synchronous rectifiers |
JP2002262570A (ja) * | 2000-12-28 | 2002-09-13 | Murata Mfg Co Ltd | スイッチング電源装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4034232A (en) * | 1976-06-01 | 1977-07-05 | Burroughs Corporation | System for synchronizing and phase shifting switching regulators |
US5570278A (en) * | 1994-02-25 | 1996-10-29 | Astec International, Ltd. | Clamped continuous flyback power converter |
JPH09285120A (ja) | 1996-04-19 | 1997-10-31 | Oki Electric Ind Co Ltd | 電源装置の主スイッチ制御回路 |
JP3201324B2 (ja) * | 1997-12-22 | 2001-08-20 | 株式会社村田製作所 | スイッチング電源装置 |
US6265855B1 (en) * | 1999-11-10 | 2001-07-24 | Hewlett-Packard Company | Coordinated switching in a multiple switching regulator system to lower peak current load |
JP3475925B2 (ja) * | 2000-09-27 | 2003-12-10 | 株式会社村田製作所 | スイッチング電源装置 |
JP3707409B2 (ja) * | 2001-09-10 | 2005-10-19 | 株式会社村田製作所 | スイッチング電源装置 |
JP2004023987A (ja) | 2002-06-20 | 2004-01-22 | Lg Electronics Inc | スイッチング回路 |
US7518263B2 (en) * | 2004-04-12 | 2009-04-14 | Delta Electronics, Inc. | Time delay control scheme for a power supply with multiple outputs |
-
2004
- 2004-11-08 GB GB0515435A patent/GB2428142B/en not_active Expired - Fee Related
- 2004-11-08 US US10/541,374 patent/US7821239B2/en not_active Expired - Fee Related
- 2004-11-08 KR KR1020057013437A patent/KR100632687B1/ko active IP Right Grant
- 2004-11-08 JP JP2005517620A patent/JP4238872B2/ja not_active Expired - Fee Related
- 2004-11-08 CN CN2004800026044A patent/CN1742423B/zh not_active Expired - Fee Related
- 2004-11-08 WO PCT/JP2004/016529 patent/WO2005076447A1/ja active Application Filing
- 2004-11-29 TW TW093136722A patent/TWI248625B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02262825A (ja) * | 1988-09-21 | 1990-10-25 | Fuji Electric Co Ltd | 半導体チョッパ装置の制御回路 |
WO2001003277A2 (en) * | 1999-07-07 | 2001-01-11 | Synqor, Inc. | Control of dc/dc converters having synchronous rectifiers |
JP2002262570A (ja) * | 2000-12-28 | 2002-09-13 | Murata Mfg Co Ltd | スイッチング電源装置 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010119761A1 (ja) | 2009-04-14 | 2010-10-21 | 株式会社村田製作所 | スイッチング電源装置 |
WO2010119760A1 (ja) | 2009-04-14 | 2010-10-21 | 株式会社村田製作所 | スイッチング電源装置 |
US8582326B2 (en) | 2009-04-14 | 2013-11-12 | Murata Manufacturing Co., Ltd. | Switching power supply apparatus |
US8625311B2 (en) | 2009-04-14 | 2014-01-07 | Murata Manufacturing Co., Ltd. | Switching power supply apparatus including a plurality of switching elements |
JP2013510543A (ja) * | 2009-11-06 | 2013-03-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 零電圧スイッチングコンバータのためのフィードバック回路 |
KR101768430B1 (ko) | 2009-11-06 | 2017-08-16 | 필립스 라이팅 홀딩 비.브이. | 영전압 스위칭 컨버터를 위한 피드백 회로 |
US9548662B2 (en) | 2010-12-02 | 2017-01-17 | Murata Manufacturing Co., Ltd. | Switching power-supply circuit |
US9621048B2 (en) | 2010-12-02 | 2017-04-11 | Murata Manufacturing Co., Ltd. | Switching power-supply circuit |
Also Published As
Publication number | Publication date |
---|---|
JP4238872B2 (ja) | 2009-03-18 |
JPWO2005076447A1 (ja) | 2007-08-02 |
KR100632687B1 (ko) | 2006-10-11 |
KR20060029204A (ko) | 2006-04-05 |
GB0515435D0 (en) | 2005-08-31 |
US7821239B2 (en) | 2010-10-26 |
GB2428142A (en) | 2007-01-17 |
GB2428142B (en) | 2007-08-08 |
US20060181230A1 (en) | 2006-08-17 |
CN1742423B (zh) | 2010-12-01 |
TW200527465A (en) | 2005-08-16 |
TWI248625B (en) | 2006-02-01 |
CN1742423A (zh) | 2006-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20210067045A1 (en) | Three-level modulation for wide output voltage range isolated dc/dc converters | |
EP3198710B1 (en) | Control method for buck-boost power converters | |
US9614447B2 (en) | Control circuits and methods for active-clamp flyback power converters | |
TWI578675B (zh) | 功率轉換器及其控制方法 | |
WO2005076447A1 (ja) | スイッチング電源装置 | |
US7596007B2 (en) | Multiphase DC to DC converter | |
US6995987B2 (en) | DC—DC converters providing reduced deadtime | |
JP5447507B2 (ja) | スイッチング電源装置 | |
US6765810B2 (en) | Full-wave coupled inductor power converter having synchronous rectifiers and two input switches that are simultaneously off for a time period of each switching cycle | |
US6958592B2 (en) | Adaptive delay control circuit for switched mode power supply | |
US7272020B2 (en) | Isolated, current-fed, pulse width modulation, DC-DC converter | |
US7706153B2 (en) | DC-DC Converter | |
US9570992B2 (en) | Regulated multiple output isolated DC to DC converter | |
EP2421136A1 (en) | Switching power supply unit | |
US9397579B2 (en) | Full-bridge switching DC/DC converters and controllers thereof | |
CN108336908B (zh) | 开关模式dc-dc电源 | |
JP3451419B2 (ja) | スイッチング電源装置 | |
JP5849599B2 (ja) | フォワード形直流−直流変換装置 | |
US20210408918A1 (en) | Controlling reverse current in switched mode power supplies to achieve zero voltage switching | |
Xiao et al. | Soft switched PWM DC/DC converter with synchronous rectifiers | |
EP3599712B1 (en) | Power converter with low drain voltage overshoot in discontinuous conduction mode | |
JPH07337006A (ja) | 同期整流回路 | |
Vangala et al. | Transformer design to achieve soft switching in low power Flyback converters |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2005517620 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006181230 Country of ref document: US Ref document number: 10541374 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020057013437 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20048026044 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 0515435.6 Country of ref document: GB Ref document number: 0515435 Country of ref document: GB |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWP | Wipo information: published in national office |
Ref document number: 1020057013437 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 10541374 Country of ref document: US |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020057013437 Country of ref document: KR |
|
122 | Ep: pct application non-entry in european phase |