CN101488716B - Driver circuit and power source converter comprising the driver circuit - Google Patents
Driver circuit and power source converter comprising the driver circuit Download PDFInfo
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- CN101488716B CN101488716B CN2008100010756A CN200810001075A CN101488716B CN 101488716 B CN101488716 B CN 101488716B CN 2008100010756 A CN2008100010756 A CN 2008100010756A CN 200810001075 A CN200810001075 A CN 200810001075A CN 101488716 B CN101488716 B CN 101488716B
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Abstract
The invention relates to a drive circuit and a power converter containing the drive circuit. The power converter comprises a main switch controlled by a driving signal, a main transformer receiving an input power supply in a switching way by the main switch, and a switching circuit which outputs a synchronizing signal and comprises a switch used for determining the receive status of an external connection load power supply; the drive circuit includes a dead pole time controller and an opposite phase generator; wherein, the dead pole time controller is provided with a second switch and a fourth switch, and the fourth switch is controlled by the synchronizing signal to control the conducting state of the second switch; the opposite phase generator is provided with a first switch and a fifth switch which are controlled by the driving signal, and the fifth switch is controlled by the first and the second switches to output a switching signal that has the opposite phase to the driving signal, and the switching circuit is controlled; furthermore, dead pole time spacing is kept between the synchronizing signal and the switching signal. The invention can actively modify the switching signal, ensures the phenomenon of reverse current not to occur, leads the circuit to be synchronous and improves the drive capability by using the drive circuit.
Description
Technical field
The present invention relates to a kind of drive circuit and comprise the power supply changeover device of this drive circuit; Particularly relate to and a kind ofly increase driving force, prevent adverse current and improve the circuit synchronism, also can reduce simultaneously circuit cost the active correction formula drive circuit and comprise the power supply changeover device of this drive circuit.
Background technology
Seeing also shown in Figure 1ly, is the circuit diagram of the synchronous rectified power transducer that drives of an existing oneself.The synchronous rectified power transducer that existing oneself drives; Comprise a main transformer 71, a driving switch 72, a rectifier switch 73, a circulation switch 74, an inductor 75 and a capacitor 76, and this main transformer 71 comprises one first coil 711 and one second coil 712.
One first termination of this first coil 711 is received an input power supply 77, and a control end of this driving switch 72 receives a drive signal, and an external load 78 is parallelly connected with this capacitor.
Control and conducting when this driving switch 72 receives this drive signal, first end of this second coil 712 can should be imported power supply 77 through these first coil, 711 inductions, and makes this rectifier switch 73 present conducting state.At this moment, this circulation switch 74 ends, and the direction of a switching current from one first end of this second coil 712 toward this inductor 75 flows, and with to these inductor 75 energy storage, and and then transfers energy to this external load 78 through this capacitor 76.
Then, when this driving switch 72 receives the control of this drive signal and ends, this rectifier switch 73 receives first end control of this second coil 712 to present cut-off state.At this moment, these circulation switch 74 conductings, the sense of current of this switching current is to flow to this inductor 75 and this circulation switch 74 from this capacitor 76, and this inductor 75 releases energy.
Receive this drive signal control once more and conducting up to this driving switch 72; This rectifier switch 73 presents conducting state; And when this circulation switch 74 was kept conducting, this switching current still flowed to this inductor 75 from this capacitor 76, and the absolute value of this switching current reduces gradually.At this moment, the part switching current flows to this second coil 712 through this circulation switch 74 with this rectifier switch 73 from this inductor 75, and this first coil 711 will be responded to the backward current of sending this input power supply 77 back to, promptly so-called adverse current phenomenon.
And reduce to zero when the electric current absolute value that flows to this inductor 75 from this capacitor 76, this circulation switch 74 ends, and the sense of current just can transmit energy to this external load 78 when changing into from this second coil 712 toward this inductor 75 once more.
In the synchronous rectified power transducer that existing oneself drives; When this driving switch 72 switches to conducting state by cut-off state; This circulation switch 74 can't switch to cut-off state immediately synchronously, and causes the adverse current phenomenon, also thereby cause power loss to make power conversion efficiency reduce.
See also shown in Figure 2; It is the circuit diagram of an existing synchronous rectified power transducer with current transformer control; Please refer to the TaiWan, China patent certificate No. 220084; Existing synchronous rectified power transducer with current transformer control is applicable to discontinuous current working mode, comprises a switch crystal 82, and speeds to return (flyback) transformer 81, a current transformer 87, a control circuit 84, a switch drive unit 85, one a synchronous rectifier switch 83 and a capacitor 86.And this reciprocating transformer 81 comprises one first coil 811 and one second coil 812; This current transformer 87 comprises a tertiary coil 871 and one the 4th coil 872.
One first termination of this first coil 811 is received an input power supply 88, and a control end of this switch crystal 82 receives a drive signal, and these capacitor 86 parallelly connected external loads 89.
When a control end of this switch crystal 82 received a drive signal, through this reciprocating transformer 81, the 4th coil 872 of this current transformer 87 can be sensed the induced voltage of corresponding this input power supply 88.This control circuit 84 receives this induced voltage via the two ends of the 4th coil 872, to control this switch drive unit 85, decides the conducting state of this synchronous rectification switch 83, and then whether decision transmits energy to this external load 89.
The sense of current of sensing when this second coil 812 is reversed to when this capacitor 86 flows to this second coil 812 and this switch crystal 82 for conducting state; Existing synchronous rectified power transducer with current transformer control can guarantee that this synchronous rectification switch 83 is in cut-off state, does not make current reflux cause the adverse current phenomenon to this input power supply 88.And its control end of Synchronization Control can't be brought in according to first of this synchronous rectification switch 83 in this switch drive unit 85, so the circuit synchronization scenario is not good.
And above-mentioned power supply changeover device can solve through general driving wafer in the problem about aspect such as driving force, switch adverse current and circuit be synchronous.But it is too high to drive cost that wafer takes, and causes the overall price of power supply changeover device to improve relatively simultaneously.
This shows that above-mentioned existing power supply changeover device obviously still has inconvenience and defective, and demands urgently further improving in structure and use.In order to solve the problem of above-mentioned existence; Relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; But do not see always that for a long time suitable design is developed completion, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore, how to provide a kind of and have high driving ability, avoiding adverse current and circuit synchronously down, the power supply changeover device that still has low manufacturing cost, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved important goal.
Because the defective that above-mentioned existing power supply changeover device exists; The inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge; And cooperate the utilization of studying the science, actively study innovation, in the hope of the drive circuit of founding a kind of new structure and the power supply changeover device that comprises this drive circuit; Can improve general existing power supply changeover device, make it have more practicality.Through constantly research, design, and, found out the present invention of true tool practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to; Overcome the defective that existing power supply changeover device exists; And a kind of drive circuit of new structure is provided and comprises the power supply changeover device of this drive circuit; Technical problem to be solved is to make it except increasing driving force, prevent adverse current and improving the circuit synchronism, can also reduce circuit cost simultaneously, is very suitable for practicality.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.A kind of power supply changeover device according to the present invention's proposition; Be applicable to and receive an input power supply and a drive signal with two stable state positions standards; And being electrically connected an external load, this power supply changeover device comprises: a main switch receives this drive signal control to change conducting state; A main transformer has first coil and second coil that is positioned at secondary side that is positioned at primary side, and this first coil is electrically connected with this main switch and switches ground through this main switch and receives this input power supply; And commutation circuit; Be electrically connected between second coil and this external load of this main transformer; And comprise a switch; This switch switchably changes conducting state changing the power supply accepting state of this external load, and synchronizing signal of output on the loop that forms of this second coil and this commutation circuit; Wherein, this power supply changeover device also comprises a drive circuit, and this drive circuit comprises: a dead utmost point time controller, have a second switch and one the 4th switch, and the 4th switch is controlled by this synchronizing signal, to control the conducting state of this second switch; And anti-phase generator; Have one first switch and one the 5th switch; This first switch is controlled by this drive signal; And the 5th switch receives the control of this first switch and this second switch, controls the conducting state of the switch of this commutation circuit to export a switching signal that is anti-phase with this drive signal; When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time; When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends; Make this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
Aforesaid power supply changeover device, wherein said drive circuit also comprise an accelerator module with one the 3rd switch, and when this switching signal converted electronegative potential into, the 3rd switch conduction can be accelerated the speed that the switch of this commutation circuit ends.
Aforesaid power supply changeover device, wherein said drive circuit also comprise an isolator that makes this drive signal isolate noise.
Aforesaid power supply changeover device; Wherein said drive circuit also comprises an accurate adjuster in position; Can carry out Dc bias to this drive signal and isolate the processing of controlling with voltage quasi position; Have one first capacitor, second capacitor, first resistor, second resistor and one first diode; And this first capacitor, this first resistor are connected with this second resistor in regular turn, and this second capacitor, this first diode are parallelly connected with this second resistor, and the cathodic electricity of this first diode is connected between this first resistor and this second resistor.
Aforesaid power supply changeover device, this power supply changeover device also comprise an output circuit that is electrically connected between this commutation circuit and this external load, and this output circuit can store energy that this commutation circuit transmits or energy is discharged to this external load.
The object of the invention and solve its technical problem and also adopt following technical scheme to realize.A kind of drive circuit according to the present invention's proposition; Be applicable to a switch of control and receive a synchronizing signal and a drive signal; Wherein this drive circuit comprises: a dead utmost point time controller; Have a second switch and one the 4th switch, the 4th switch is controlled by this synchronizing signal, to control the conducting state of this second switch; An and anti-phase generator; Have one first switch and one the 5th switch; This first switch is controlled by this drive signal; And the 5th switch receives the control of this first switch and this second switch, controls the conducting state of this switch to export a switching signal that is anti-phase with this drive signal; When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time; When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends; Make this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
Aforesaid power supply changeover device, wherein said drive circuit also comprise an accelerator module with one the 3rd switch, and when switching signal converted electronegative potential into, the 3rd switch conduction can be accelerated the speed that this switch ends.
Aforesaid power supply changeover device, wherein said drive circuit also comprise an isolator that makes this drive signal isolate noise.
Aforesaid power supply changeover device; Wherein said drive circuit also comprises an accurate adjuster in position; Can carry out Dc bias to this drive signal and isolate the processing of controlling with voltage quasi position; Have one first capacitor, second capacitor, first resistor, second resistor and one first diode; And this first capacitor, this first resistor are connected with this second resistor in regular turn, and this second capacitor, this first diode are parallelly connected with this second resistor, and the cathodic electricity of this first diode is connected between this first resistor and this second resistor.
The present invention compared with prior art has tangible advantage and beneficial effect.Can know that by above technical scheme major technique of the present invention thes contents are as follows:
In order to achieve the above object; According to power supply changeover device of the present invention; Be applicable to that receiving an input power supply and has the accurate drive signal in two stable state positions, and be electrically connected an external load, this power supply changeover device comprises a main switch, a main transformer, switches circuit and one drive circuit.This main switch receives this drive signal control to change conducting state.This main transformer, have one be positioned at primary side first coil and be positioned at second coil of secondary side, this first coil is electrically connected with this main switch and switches ground through this main switch and receives this input power supply.This commutation circuit; Be electrically connected between second coil and this external load of this main transformer; And comprise a switch, this switch switchably changes conducting state changing the power supply accepting state of this external load, and output one synchronous signal on the loop that forms of this second coil and this commutation circuit.This drive circuit comprises: a dead utmost point time controller, have a second switch and one the 4th switch, and the 4th switch is controlled by this synchronizing signal, to control the conducting state of this second switch; An and anti-phase generator; Have one first switch and one the 5th switch; This first switch receives the control of this drive signal; And the 5th switch receives the control of this first switch and this second switch, with export one be anti-phase with this drive signal switching signal control the conducting state of the switch of this commutation circuit.When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends, and makes this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
In addition; In order to achieve the above object, according to drive circuit of the present invention, be applicable to control one switch and receive a synchronous signal and a drive signal; Comprise: a dead utmost point time controller; Have a second switch and one the 4th switch, the 4th switch is controlled by this synchronizing signal, to control the conducting state of this second switch; An and anti-phase generator; Have one first switch and one the 5th switch; This first switch is controlled by this drive signal, and the 5th switch receives the control of this first switch and this second switch, with export one be anti-phase with this drive signal switching signal control the conducting state of this switch.When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends, and makes this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
By technique scheme; Drive circuit of the present invention and the power supply changeover device that comprises this drive circuit have advantage and beneficial effect at least: the present invention can this switching signal of active correction; Make this synchronizing signal and this switching signal keep the spacing of a dead utmost point time; Can guarantee the adverse current phenomenon does not take place, and cooperate this synchronizing signal to make circuit synchronous, and promote driving force with this drive circuit.
In sum, the invention relates to a kind of drive circuit and comprise the power supply changeover device of this drive circuit.This power supply changeover device comprises: a main switch is controlled by a drive signal; One main transformer switches ground through main switch and receives an input power supply; One switches circuit, exports a synchronous signal and comprises that one determines the switch of the power supply accepting state of external load; And one drive circuit, comprising: a dead utmost point time controller, have a second switch and one the 4th switch, the 4th switch receives the conducting state of synchronizing signal control with the control second switch; An and anti-phase generator; Have one receive drive signal control first switch and one the 5th switch; And the 5th switch receives the control of first switch and second switch; With export one be anti-phase with drive signal switching signal control commutation circuit, and make the spacing that keeps the dead utmost point time between synchronizing signal and switching signal.In addition, a kind of drive circuit is also disclosed.The present invention is very suitable for practicality except increasing driving force, preventing can also reduce circuit cost simultaneously adverse current and the raising circuit synchronism.The present invention has above-mentioned plurality of advantages and practical value; No matter it all has bigger improvement on product structure or function; Obvious improvement is arranged technically, and produced handy and practical effect, and more existing power supply changeover device has the outstanding effect of enhancement; Thereby being suitable for practicality more, really is the new design of a novelty, progress, practicality.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let of the present invention above-mentioned with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the circuit diagram of the synchronous rectified power transducer of existing oneself's driving.
Fig. 2 is the circuit diagram of an existing synchronous rectified power transducer with current transformer control.
Fig. 3 is the circuit diagram of power supply changeover device first preferred embodiment of the present invention.
Fig. 4 is the circuit diagram of the drive circuit of power supply changeover device first preferred embodiment of the present invention.
Fig. 5 is a sequential chart, and the relativeness of the main signal of power supply changeover device first preferred embodiment of the present invention is described.
Fig. 6 is the circuit diagram of power supply changeover device second preferred embodiment of the present invention.
Fig. 7 is the circuit diagram of power supply changeover device the 3rd preferred embodiment of the present invention.
Fig. 8 is the circuit diagram of power supply changeover device the 4th preferred embodiment of the present invention.
Fig. 9 is the circuit diagram of power supply changeover device the 5th preferred embodiment of the present invention.
Figure 10 is the circuit diagram of power supply changeover device the 6th preferred embodiment of the present invention.
Figure 11 is the circuit diagram of power supply changeover device the 7th preferred embodiment of the present invention.
Figure 12 is the circuit diagram of power supply changeover device the 8th preferred embodiment of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To drive circuit that proposes according to the present invention and its embodiment of power supply changeover device, structure, characteristic and the effect thereof that comprises this drive circuit, specify as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to appear in the following detailed description that cooperates with reference to graphic preferred embodiment.Through the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet the appended graphic usefulness that only provides reference and explanation be not to be used for the present invention is limited.
First preferred embodiment
Seeing also shown in Figure 3ly, is the circuit diagram of power supply changeover device first preferred embodiment of the present invention.First preferred embodiment of power supply changeover device of the present invention is applicable to that receiving an input power supply 61 and has the first accurate drive signal drive1 of two stable state positions; And be electrically connected an external load 62; And in this preferred embodiment; This signal is pulse wave width modulation (pulse width modulation is called for short a PWM) signal, but not as limit.The power supply changeover device of the present invention's first preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41 and one first output circuit 51.And this drive circuit 3 receives this first a drive signal drive1 and a synchronous signal sync, and sees a switching signal off.In the present embodiment, this switching signal is one the 3rd drive signal drive3.
Above-mentioned input circuit 1 receives and output should be imported power supply 61, and exports a master control voltage according to this first drive signal drive1.This input circuit 1 comprises a main switch 11 and a magnetic reset cell 12, and this main switch 11 comprises one first end, one second end and a control end.The second end ground connection of this main switch 11, and the control end of this main switch 11 can receive this first drive signal drive1 is with the voltage of first end that determines this main switch 11, i.e. master control voltage.When the first drive signal drive1 is a low-potential state, master control voltage presents high potential state.When the first drive signal drive1 is a high potential state, master control voltage presents low-potential state.And this magnetic reset cell 12 is electrically connected between first end of this input power supply 61 and this main switch 11.
Above-mentioned main transformer 21 is according to this master control voltage decision mode of operation.This main transformer 21 is (forward) transformers forward, comprise one be positioned at primary side first coil 211 and be positioned at second coil 212 of secondary side.First termination of this first coil 211 is received and should be imported power supply 61, and second termination of this first coil 211 is received this master control voltage.When master control voltage is low-potential state, first end of this second coil 212 can be sensed a pair of coupled signal that should import power supply 61.When master control voltage is high potential state, then can't respond to.
Whether the first above-mentioned commutation circuit 41, decision transmit energy to this external load 62, comprise a wave detector 411 and a phase-veversal switch 412.This wave detector 411 has an anode and a negative electrode, and this phase-veversal switch 412 has one first end, one second end and a control end.The anode of this wave detector 411 is electrically connected first end of this second coil 212, and the cathodic electricity of this wave detector 411 connects first end of phase-veversal switch 412, and this synchronizing signal sync is exported in electrical connection place thus.And the second end ground connection of this phase-veversal switch 412.That is to say that this synchronizing signal sync is equivalent to first end of this phase-veversal switch 412 and the cross-pressure between second end.And the control end of this phase-veversal switch 412 receives the 3rd drive signal drive3 from this drive circuit 3.In this preferred embodiment, this wave detector 411 is diodes, and not as limit.
The first above-mentioned output circuit 51 comprises an output inductor 511, an output resistor 513 and an output capacitor 512.This output inductor 511 and this output resistor 513 are series between first end and second end of this phase-veversal switch 412, and this output capacitor 512, this output resistor 513 and an external load 62 are connected in parallel to each other.
Seeing also shown in Figure 4ly, is the circuit diagram of the drive circuit of power supply changeover device first preferred embodiment of the present invention.Above-mentioned drive circuit 3 receives this first drive signal drive1, and sees one according to this off and keep the 3rd drive signal drive3 (like Fig. 5) of a dead utmost point time (dead time) with this synchronizing signal sync.This drive circuit 3 comprises the accurate adjuster of an isolator 31,32, an anti-phase generator 33, one a dead utmost point time controller 34 and an accelerator module 35.
This isolator 31 makes this first drive signal drive1 isolate output one second drive signal drive2 behind the noise.This accurate adjuster 32 can carry out Dc bias to this second drive signal drive2 and isolate the processing of controlling with voltage quasi position, to export back, position signal adj_v surely.This anti-phase generator 33 receives should accurate position back signal adj_v, with export one with this standard position after signal adj_v be the inversion signal inv of anti-phase.And this accelerator module 35 is exported the 3rd drive signal drive3 according to this inversion signal inv, and accelerates the velocity of discharge of this first commutation circuit 41.Damned utmost point time controller 34 can guarantee to exist between this synchronizing signal sync and the 3rd drive signal drive3 the dead utmost point time; Reach zero voltage switching (Zero Voltage Switch; Be called for short ZVS) and zero current switching (Zero CurrentSwitch is called for short ZCS).
This isolator 31 is in order to avoiding noise, and has one first retarder 311 and one second retarder 312.First termination of this first retarder 311 is received this first drive signal drive1, and this second drive signal of first end of this second retarder 312 output drive2.And second end of this first and second retarder 311,312 is ground connection respectively.In this preferred embodiment, this isolator 31 is a transformer, but also can be an optical coupler, and not as limit.
This accurate adjuster 32 can carry out Dc bias to this second drive signal drive2 and isolate the processing of controlling with voltage quasi position.This accurate adjuster 32 has one first capacitor C1, one second capacitor C2, one first resistor R 1, one second resistor R 2 and one first diode D1.This first capacitor C1 receives this second drive signal drive2, and this first capacitor C1, this first resistor R 1 and this second resistor R 2 are series between first end and second end of second retarder 312 in regular turn.This second capacitor C2 is parallelly connected with this second resistor R 2, and the plus earth of this first diode D1, and the cathodic electricity of this first diode D1 is connected in 2 of this first resistor R 1 and this second resistor R, and output should accurate position back signal adj_v thus.
This anti-phase generator 33 receives a direct current power supply DC and this standard position back signal adj_v, is the inversion signal inv of anti-phase with output and this standard position back signal adj_v.This anti-phase generator 33 has one first switch Q1, one the 5th switch Q5, one the 3rd resistor R 3, one the 4th resistor R 4, one second diode D2 and one the 3rd diode D3.The control end of this first switch Q1 receives and is somebody's turn to do accurate position back signal adj_v, and the second end ground connection of the first switch Q1.First end of this first switch Q1 is electrically connected the negative electrode of the 3rd diode D3 and the control end of the 5th switch Q5.And the 3rd resistor R 3 and the 4th resistor R 4 are series between the control end and first end of the 5th switch Q5 in regular turn.And the cathodic electricity of this second diode D2 is connected in 4 of the 3rd resistor R 3 and the 4th resistor R; The anode of this second diode D2 receives this DC power supply DC, and by the anode of the 3rd diode D3 and this inversion signal of the place's of electrical connection output inv of second end of the 5th switch Q5.And in this preferred embodiment, this DC power supply DC is the voltage that is sent to this external load 62, but an also extraneous power supply.
Damned utmost point time controller 34; Can make the rising edge (rising edge) of the 3rd drive signal drive3 and falling edge (falling edge) all keep the dead utmost point time according to synchronizing signal sync, not make this binary signal be in high potential state simultaneously and the adverse current phenomenon takes place with synchronizing signal sync.Damned utmost point time controller 34 has a second switch Q2, one the 4th switch Q4, one the 5th resistor R 5, one the 6th resistor R 6, one the 7th resistor R 7, one the 8th resistor R 8, one the 4th diode D4 and one the 5th diode D5.
The 5th resistor R 5, the 6th resistor R 6, the 4th diode D4 and the 7th resistor R 7 are connected in regular turn.First end of this second switch Q2 is electrically connected first end of the first switch Q1,6 of control end electrical connection the 5th resistor R 5 of this second switch Q2 and the 6th resistor R, and the second end ground connection of this second switch Q2.The control end of the 4th switch Q4 is electrically connected the anode of the 4th diode D4; First end of the 4th switch Q4 is electrically connected the negative electrode of the 4th diode D4, and second end of the 4th switch Q4 is electrically connected on the 5th resistor R 5 and 7 of the 7th resistor R and ground connection.The 8th resistor R 8 is electrically connected between the negative electrode of control end and the 5th diode D5 of the 4th switch Q4.And the anode of the 5th diode D5 receives the synchronizing signal sync from this first commutation circuit 41.
This accelerator module 35 can be accelerated the velocity of discharge of this first commutation circuit 41, has one the 3rd switch Q3, one the 9th resistor R 9 and one the 6th diode D6.The 9th resistor R 9 is electrically connected between the control end and one second end of the 3rd switch Q3, and the cathodic electricity of the 6th diode D6 connects one first end of the 3rd switch Q3.And the anode by the 6th diode D6 receives this inversion signal inv with the place of electrical connection of the control end of the 3rd switch Q3.And first end of the 3rd switch Q3 output the 3rd drive signal drive3, the second end ground connection of the 3rd switch Q3.
When the 3rd drive signal drive3 switches to electronegative potential, the 3rd switch Q3 conducting, this moment, one capacitor parasitics of phase-veversal switch 412 can get into cut-off state to accelerate phase-veversal switch 412 via the 3rd switch Q3 discharge.
Below, the start situation of drive circuit 3 is described to four kinds of current potential transition statuses of this first drive signal drive1.Just, high potential, transfer electronegative potential, electronegative potential to and transfer high potential to by high potential by electronegative potential.
See also Fig. 4 and shown in Figure 5, Fig. 5 is a sequential chart, and the relativeness of the main signal of power supply changeover device first preferred embodiment of the present invention is described.When this first drive signal drive1 is in high potential; The high potential of this synchronizing signal sync can make this second switch Q2 conducting, and the high potential of accurate position back signal adj_v makes the first switch Q1 conducting, at this moment; The 4th switch Q4 ends; And the 3rd diode D 3 and the 3rd switch Q3 conducting, and the 5th switch Q5 ends, and makes the 3rd drive signal drive3 be positioned at electronegative potential.
Drive1 transfers electronegative potential to by high potential when this first drive signal; And synchronizing signal sync is depressured to the electronegative potential that (being falling edge) can't make this second switch Q2 conducting; And an accurate position back signal adj_v is when also dropping to the electronegative potential that can't make the first switch Q1 conducting, the 4th switch Q4 conducting, the 5th switch Q5 and the 6th diode D6 conducting; The 3rd switch Q3 ends, and makes the 3rd drive signal drive3 transition to high potential.Therefore, the falling edge of synchronizing signal sync can and the 3rd drive signal drive3 between keep the spacing of a dead utmost point time, just can reach zero voltage switching.
When this first drive signal drive1 is in electronegative potential; The electronegative potential of this synchronizing signal sync can't make this second switch Q2 conducting, and the electronegative potential of accurate position back signal adj_v can't make the first switch Q1 conducting, at this moment; The 4th switch Q4 conducting; The 5th switch Q5 and the 6th diode D6 are conducted, and the 3rd switch Q3 ends, and makes the 3rd drive signal drive3 be positioned at high potential.
Drive1 transfers high potential to by electronegative potential when this first drive signal; And synchronizing signal sync boosts to the high potential that (being rising edge) is enough to make this second switch Q2 conducting; And an accurate position back signal adj_v is when rising to the high potential that can make the first switch Q1 conducting, and the 4th switch Q4 ends, and the 3rd diode D3 and the 3rd switch Q3 conducting; And the 5th switch Q5 ends, and makes the 3rd drive signal drive3 transition to electronegative potential.Therefore; After this first drive signal drive1 begins a bit of time of transition (rising edge); This synchronizing signal sync just carries out transition (rising edge); So the rising edge of this synchronizing signal sync can and the 3rd drive signal drive3 between keep the spacing of a dead utmost point time, just can reach the zero current switching.
By the analysis of above four kinds of current potential transition statuses, can learn to have only when this synchronizing signal sync is in electronegative potential that the 3rd drive signal drive3 just can be in high potential.Just, binary signal can not be in high potential state simultaneously, can reach zero voltage switching and zero current really and switch.
See also Fig. 3 and shown in Figure 5,, the start situation of this preferred embodiment is described with following four time intervals at this.
In time t1, this first drive signal drive1 is a high potential state at time t0, these main switch 11 conductings, and this drive circuit 3 produces the 3rd drive signal drive3 of electronegative potential.This phase-veversal switch 412 receives the 3rd drive signal drive3 control and ends.At this moment, this switching current flows to this output inductor 511 by first end of this second coil 212, and to these output inductor 511 energy storage, to transmit energy to this external load 62.
In time t2, this first drive signal drive1 transfers low-potential state to from high potential state at time t1, and synchronizing signal sync also goes to electronegative potential, and keeps the dead utmost point time (zero voltage switching) with the 3rd drive signal drive3 that will transfer high potential to.At this moment, this main switch 11 ends, and this first coil 211 begins this magnetic reset cell 12 is released energy.And this phase-veversal switch 412 ends, and this switching current continuation is to these output inductor 511 energy storage, to transmit energy to this external load 62.
In time t3, this first drive signal drive1 is a low-potential state at time t2, and this main switch 11 ends, and this drive circuit 3 produces the 3rd drive signal drive3 of high potential.This phase-veversal switch 412 receives the 3rd drive signal drive3 control and conducting.At this moment, 211 pairs of these magnetic reset cells 12 of this first coil release energy, and 511 pairs of these phase-veversal switches 412 of this output inductor release energy.
At time t3 in time t4; After this first drive signal drive1 begins a bit of time of transition (rising edge); This synchronizing signal sync also carries out transition (rising edge), and keeps the dead utmost point time (zero current switching) with the 3rd drive signal drive3 that will transfer electronegative potential to.At this moment, this main switch 11 gets into conducting states, and the 3rd drive signal drive3 switches to electronegative potential soon, and this phase-veversal switch 412 thereby end rapidly makes this switching current once more to these output inductor 511 energy storage, and transmits energy to this external load 62.
Second preferred embodiment
Seeing also shown in Figure 6ly, is the circuit diagram of power supply changeover device second preferred embodiment of the present invention.The power supply changeover device of the present invention's second preferred embodiment comprises an input circuit 1, a main transformer 22, one drive circuit 3, one first commutation circuit 41 and one first output circuit 51.And this drive circuit 3 receives this first a drive signal drive1 and a synchronous signal sync, and sees a switching signal off.In the present embodiment, this switching signal is one the 3rd drive signal drive3.And this drive circuit 3 is similar with this first preferred embodiment, does not repeat them here.
Above-mentioned input circuit 1 omits this magnetic reset switch 12 than first preferred embodiment, and all the other elements and start situation all similar are so will not give unnecessary details.
Above-mentioned main transformer 22 is according to this master control voltage decision mode of operation.This main transformer 22 is reciprocating transformers, comprises one first coil 221 and one second coil 222.First termination of this first coil 221 is received and should be imported power supply 61, and second termination of this first coil 221 is received this master control voltage.When master control voltage is low-potential state, second end of this second coil 222 can be sensed a pair of coupled signal that should import power supply 61.When master control voltage is high potential state, then can't respond to.
Whether the first above-mentioned commutation circuit 41, decision transmit energy to this external load 62.This first commutation circuit 41 comprises a homophase switch 413, and this homophase switch 413 has one first end, one second end and a control end.The second end ground connection of this homophase switch 413, first end of this homophase switch 413 is electrically connected second end of this second coil 222, and see off from here one be equal to this coupled signal synchronizing signal sync.That is to say that this synchronizing signal sync is equivalent to first end of this homophase switch 413 and the cross-pressure between second end.And the control end of this homophase switch 413 receives the 3rd drive signal drive3 from this drive circuit 3.
The first above-mentioned output circuit 51 comprises an output resistor 513 and an output capacitor 512.This output resistor 513 is electrically connected between second end of first end and this homophase switch 413 of this second coil 222, and this output capacitor 512, this output resistor 513 and an external load 62 are connected in parallel to each other.
See also Fig. 5 and shown in Figure 6,, the start situation of this preferred embodiment is described with following four time intervals at this.
In time t1, this first drive signal drive1 is a high potential state at time t0, and this drive circuit 3 produces the 3rd drive signal drive3 of electronegative potential.These main switch 11 conductings, this homophase switch 413 receive the 3rd drive signal drive3 control and end.At this moment, this second coil 222 carries out energy storage.
In time t2, this first drive signal drive1 transfers low-potential state to from high potential state at time t1, and synchronizing signal sync also goes to electronegative potential, and keeps the dead utmost point time (zero voltage switching) with the 3rd drive signal drive3 that will transfer high potential to.At this moment, this main switch 11 ends, and this homophase switch 413 ends, and this second coil 222 is proceeded energy storage.
In time t3, this first drive signal drive1 is a low-potential state at time t2, and this main switch 11 ends, and this drive circuit 3 produces the 3rd drive signal drive3 of high potential.This homophase switch 413 receives the 3rd drive signal drive3 control and conducting.At this moment, the NE BY ENERGY TRANSFER of this second coil 222 is to this external load 62.
At time t3 in time t4; After this first drive signal drive1 begins a bit of time of transition (rising edge); This synchronizing signal sync just carries out transition (rising edge), and will transfer the 3rd drive signal drive3 one dead utmost point time (zero current switching) of maintenance of electronegative potential to influenced by the first switch Q1 conducting.At this moment, this main switch 11 gets into conducting states, and the 3rd drive signal drive3 switches to electronegative potential soon, this homophase switch 413 thereby end rapidly, and this second coil 222 carries out energy storage once more.
The 3rd preferred embodiment
Seeing also shown in Figure 7ly, is the circuit diagram of power supply changeover device the 3rd preferred embodiment of the present invention.The power supply changeover device of the present invention's the 3rd preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41 and one first output circuit 51.And this drive circuit 3 receives this first a drive signal drive1 and a synchronous signal sync, sees one off and switches signal.In the present embodiment, this switching signal has one second drive signal drive2 and one the 3rd drive signal drive3.Except this first commutation circuit 41, all the other elements are similar with this first preferred embodiment, do not repeat them here.
Whether the first above-mentioned commutation circuit 41, decision transmit energy to this external load 62.This first commutation circuit 41 comprises a homophase switch 413 and a phase-veversal switch 412, and this homophase switch 413 has one first end, one second end and a control end respectively with this phase-veversal switch 412.First end of this homophase switch 413 is electrically connected second end of this second coil 212; And second end of this homophase switch 413 and second end of this phase-veversal switch 412 be ground connection respectively; And first end of this phase-veversal switch 412 is electrically connected first end of this second coil 212, and electrical connection place output one is equal to the synchronizing signal sync of this coupled signal thus.That is to say that this synchronizing signal sync is equivalent to first end of this phase-veversal switch 412 and the cross-pressure between second end.And the control end of this homophase switch 413 receives this second drive signal drive2, and the control end of this phase-veversal switch 412 receives the 3rd drive signal drive3.
See also Fig. 5 and shown in Figure 7,, the start situation of this preferred embodiment is described with following four time intervals at this.
In time t1, this first drive signal drive1 is a high potential state at time t0, these main switch 11 conductings, and this drive circuit 3 produces second drive signal drive2 of high potential and the 3rd drive signal drive3 of electronegative potential.At this moment; This homophase switch 413 conductings and this phase-veversal switch 412 ends; This switching current flows to this output inductor 511 by first end of this second coil 212, and to these output inductor 511 energy storage, to transmit energy to this output capacitor 512 and this external load 62.
At time t1 in time t2; This first drive signal drive1 transfers low-potential state to from high potential state; The synchronizing signal sync and the second drive signal drive2 also go to electronegative potential, and keep the dead utmost point time (zero voltage switching) with the 3rd drive signal drive3 that will transfer high potential to.At this moment, this main switch 11 ends, and this first coil 211 begins this magnetic reset cell 12 is released energy, and this homophase switch 413 ends with this phase-veversal switch 412, provides energy to this external load 62 by this output capacitor 512.
In time t3, this first drive signal drive1 is a low-potential state at time t2, and this main transformer 21 can't be responded to, and this drive circuit 3 produces second drive signal drive2 of electronegative potential and the 3rd drive signal drive3 of high potential.This homophase switch 413 receives this second drive signal drive2 control and ends, and this phase-veversal switch 412 receives the 3rd drive signal drive3 control and conducting.At this moment, this main switch 11 ends, and 211 pairs of these magnetic reset cells 12 of this first coil release energy, and 511 pairs of these phase-veversal switches 412 of this output inductor release energy.
At time t3 in time t4; After this first drive signal drive1 begins a bit of time of transition (rising edge); This synchronizing signal sync also carries out transition (rising edge), and keeps the dead utmost point time (zero current switching) with the 3rd drive signal drive3 that will transfer electronegative potential to.At this moment, main switch 11 gets into conducting states with homophase switch 413, and this phase-veversal switch 412 ends rapidly, and this switching current is once more to these output inductor 511 energy storage, and transmits energy to this output capacitor 512 and this external load 62.
The 4th preferred embodiment
Seeing also shown in Figure 8ly, is the circuit diagram of power supply changeover device the 4th preferred embodiment of the present invention.The power supply changeover device of the present invention's the 4th preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41, one second commutation circuit 42, one first output circuit 51 and one second output circuit 52.
This input circuit 1, this drive circuit 3, this first commutation circuit 41 and this first output circuit 51; Similar with first preferred embodiment; And this second commutation circuit 42 is similar with this first commutation circuit 41, and this second output circuit 52 is similar with this first output circuit 51, does not repeat them here.
This main transformer 21 is transformers forward, comprises one first coil 211, one second coil 212 and a tertiary coil 213.The two ends of this second coil 212 are electrically connected with this first commutation circuit 41, and the two ends of this tertiary coil 213 are electrically connected with this second commutation circuit 42.
The start situation of this preferred embodiment is similar with first preferred embodiment, and have the technical staff of common knowledge under the present invention in the technical field can inference and get, so do not repeat them here.
The 5th preferred embodiment
Seeing also shown in Figure 9ly, is the circuit diagram of power supply changeover device the 5th preferred embodiment of the present invention.The power supply changeover device of the present invention's the 5th preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41, one second commutation circuit 42, one first output circuit 51 and one second output circuit 52.
Except this main transformer 21, second commutation circuit 42 and second output circuit 52, all the other elements are similar with the embodiment of front, do not repeat them here.
In this main transformer 21, the two ends of this second coil 212 are electrically connected with this first commutation circuit 41, and first end of this second coil 212 is electrically connected second end of this tertiary coil 213.And first end of this tertiary coil 213 is electrically connected the anode of the wave detector 421 of this second commutation circuit 42.
The 6th preferred embodiment
Seeing also shown in Figure 10ly, is the circuit diagram of power supply changeover device the 6th preferred embodiment of the present invention.The power supply changeover device of the present invention's the 6th preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41, one second commutation circuit 42, one first output circuit 51 and one second output circuit 52.
Except the connected mode of this main transformer 21, all the other elements are similar with the 4th preferred embodiment, do not repeat them here.
In this main transformer 21, the two ends of this second coil 212 are electrically connected with this first commutation circuit 41.First end of this tertiary coil 213 is electrically connected the anode of the wave detector 421 of this second commutation circuit 42, and second end of this tertiary coil 213 is electrically connected the negative electrode of the wave detector 411 of this first commutation circuit 41.
The start situation of this preferred embodiment is similar with the 5th preferred embodiment, except this tertiary coil 213 is that the wave detector 411 and second coil 212 through first commutation circuit 41 stacks.
The 7th preferred embodiment
Seeing also shown in Figure 11ly, is the circuit diagram of power supply changeover device the 7th preferred embodiment of the present invention.The power supply changeover device of the present invention's the 7th preferred embodiment comprises an input circuit 1, a main transformer 22, one drive circuit 3, one first commutation circuit 41, one second commutation circuit 42, one first output circuit 51 and one second output circuit 52.
This input circuit 1, this drive circuit 3, this first commutation circuit 41 and this first output circuit 51; Similar with second preferred embodiment; And this second commutation circuit 42 is similar with this first commutation circuit 41, and this second output circuit 52 is similar with this first output circuit 51, does not repeat them here.
This main transformer 22 is reciprocating transformers, comprises one first coil 221, one second coil 222 and a tertiary coil 223.The two ends of this second coil 222 are electrically connected with this first commutation circuit 41, and the two ends of this tertiary coil 223 are electrically connected with this second commutation circuit 42.And second end of second end of this second coil 222 and this tertiary coil 223 can be sensed a pair of coupled signal that should import power supply 61 respectively.
The start situation of this preferred embodiment is similar with second preferred embodiment, and have the technical staff of common knowledge under the present invention in the technical field can inference and get, so do not repeat them here.
The 8th preferred embodiment
Seeing also shown in Figure 12ly, is the circuit diagram of power supply changeover device the 8th preferred embodiment of the present invention.The power supply changeover device of the present invention's the 8th preferred embodiment comprises an input circuit 1, a main transformer 21, one drive circuit 3, one first commutation circuit 41, one second commutation circuit 42, one first output circuit 51 and one second output circuit 52.
This input circuit 1, this drive circuit 3, this first commutation circuit 41 and this first output circuit 51; Similar with the 3rd preferred embodiment; And this second commutation circuit 42 is similar with this first commutation circuit 41, and this second output circuit 52 is similar with this first output circuit 51, does not repeat them here.
This main transformer 21 is transformers forward, comprises one first coil 211, one second coil 212 and a tertiary coil 213.The two ends of this second coil 212 are electrically connected with this first commutation circuit 41, and the two ends of this tertiary coil 213 are electrically connected with this second commutation circuit 42.And first end of first end of this second coil 212 and this tertiary coil 213 can be sensed a pair of coupled signal that should import power supply 61 respectively.
The start situation of this preferred embodiment is similar with the 3rd preferred embodiment, and have the technical staff of common knowledge under the present invention in the technical field can inference and get, so do not repeat them here.
It should be noted that; In above preferred embodiment; It is 1: 1 that this first coil 211,221 is counted ratio with the coil lock of this second coil 212,222; It is 1: 1 that this first coil 211,221 is counted ratio with the coil lock of this tertiary coil 213,223, and this first retarder 311 to count ratio with the coil lock of this second retarder 312 be 1: 1, and not as limit.
And it should be noted that in above preferred embodiment this main switch 11, phase-veversal switch 412,422 and homophase switch 413,423 are N transistor npn npn (transistor are an electric crystal, below all be called transistor), and not as limit.And this first switch Q1 and this second switch Q2 of this drive circuit 3 are N transistor npn npns; The 3rd switch Q3 and the 4th switch Q4 are PNP two-carrier junction transistor (bipolar junction transistor; Be called for short BJT), the 5th switch Q5 is NPNBJT, and not as limit.
And it should be noted that the drive circuit 3 among the above embodiment can independently start from power supply changeover device of the present invention.
In sum, this drive circuit 3 can this synchronizing signal of active correction sync and the relativeness of the 3rd drive signal drive3, guaranteeing that the adverse current phenomenon does not take place, and cooperate this synchronizing signal sync to make circuit synchronous.And the accelerator module 35 of this drive circuit 3 helps the velocity of discharge of the 3rd drive signal drive3 institute switch driven, can effectively promote driving force.In addition, do not need to drive wafer as such employing of prior art, the present invention can reach above-mentioned requirements, can significantly reduce circuit cost, so can reach the object of the invention and effect really.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (9)
1. a power supply changeover device is applicable to receive an input power supply and the drive signal with two stable state positions standards, and is electrically connected an external load, and this power supply changeover device comprises:
A main switch receives this drive signal control to change conducting state;
A main transformer has first coil and second coil that is positioned at secondary side that is positioned at primary side, and this first coil is electrically connected with this main switch and switches ground through this main switch and receives this input power supply; And
A commutation circuit; Be electrically connected between second coil and this external load of this main transformer; And comprise a switch; This switch switchably changes conducting state changing the power supply accepting state of this external load, and synchronizing signal of output on the loop that forms of this second coil and this commutation circuit;
It is characterized in that this power supply changeover device also comprises a drive circuit, this drive circuit comprises:
A dead utmost point time controller has a second switch, the 4th switch, the 5th resistor, the 6th resistor, the 7th resistor, the 8th resistor, the 4th diode and one the 5th diode; Wherein
The 5th resistor, the 6th resistor, the 4th diode and the 7th resistor are connected in regular turn, and the control end of this second switch is electrically connected between the 5th resistor and the 6th resistor, and an end ground connection of this second switch; The control end of the 4th switch is electrically connected the anode of the 4th diode; First end of the 4th switch is electrically connected the negative electrode of the 4th diode; And second end of the 4th switch is electrically connected between the 5th resistor and the 7th resistor and ground connection, and the 8th resistor is electrically connected between the negative electrode of control end and the 5th diode of the 4th switch; And the anode of the 5th diode receives this synchronizing signal from this commutation circuit; The 4th switch is controlled by this synchronizing signal; Controlling the conducting state of this second switch, and this second switch is the N transistor npn npn, and the 4th switch is a PNP two-carrier junction transistor; And
An anti-phase generator; Have one first switch and one the 5th switch; This first switch is controlled by this drive signal; And the 5th switch receives the control of this first switch and this second switch, controls the conducting state of the switch of this commutation circuit to export a switching signal that is anti-phase with this drive signal;
When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time;
When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends; Make this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
2. power supply changeover device as claimed in claim 1; It is characterized in that wherein said drive circuit also comprises an accelerator module with one the 3rd switch; When this switching signal converted electronegative potential into, the 3rd switch conduction can be accelerated the speed that the switch of this commutation circuit ends.
3. power supply changeover device as claimed in claim 1 is characterized in that wherein said drive circuit also comprises an isolator that makes this drive signal isolate noise.
4. power supply changeover device as claimed in claim 1; It is characterized in that wherein said drive circuit also comprises an accurate adjuster in position; Can carry out Dc bias to this drive signal and isolate the processing of controlling with voltage quasi position; Have one first capacitor, second capacitor, first resistor, second resistor and one first diode; And this first capacitor, this first resistor are connected with this second resistor in regular turn, and this second capacitor, this first diode are parallelly connected with this second resistor, and the cathodic electricity of this first diode is connected between this first resistor and this second resistor.
5. power supply changeover device as claimed in claim 1; It is characterized in that this power supply changeover device also comprises an output circuit that is electrically connected between this commutation circuit and this external load, this output circuit can store energy that this commutation circuit transmits or energy is discharged to this external load.
6. a drive circuit is applicable to one the 6th switch of control and receives a synchronizing signal and a drive signal, it is characterized in that this drive circuit comprises:
A dead utmost point time controller has a second switch, the 4th switch, the 5th resistor, the 6th resistor, the 7th resistor, the 8th resistor, the 4th diode and one the 5th diode; Wherein
The 5th resistor, the 6th resistor, the 4th diode and the 7th resistor are connected in regular turn, and the control end of this second switch is electrically connected between the 5th resistor and the 6th resistor, and an end ground connection of this second switch; The control end of the 4th switch is electrically connected the anode of the 4th diode; First end of the 4th switch is electrically connected the negative electrode of the 4th diode; And second end of the 4th switch is electrically connected between the 5th resistor and the 7th resistor and ground connection, and the 8th resistor is electrically connected between the negative electrode of control end and the 5th diode of the 4th switch; And the anode of the 5th diode receives this synchronizing signal from a switching circuit; The 4th switch is controlled by this synchronizing signal; Controlling the conducting state of this second switch, and this second switch is the N transistor npn npn, and the 4th switch is a PNP two-carrier junction transistor; And
One anti-phase generator; Have one first switch and one the 5th switch; This first switch is controlled by this drive signal; And the 5th switch receives the control of this first switch and this second switch, controls the conducting state of the 6th switch to export a switching signal that is anti-phase with this drive signal;
When this drive signal transfers electronegative potential to by high potential; And when this synchronizing signal is depressured to the electronegative potential that can't make this second switch conducting; The 5th switch conduction; Make this switching signal transition to high potential, and the falling edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time;
When this drive signal transfers high potential to by electronegative potential; And when this synchronizing signal rises to the high potential that makes this second switch conducting; The 5th switch ends; Make this switching signal transition to electronegative potential, and the rising edge of this synchronizing signal can and this switching signal between keep the spacing of a dead utmost point time.
7. power supply changeover device as claimed in claim 6 is characterized in that wherein said drive circuit also comprises an accelerator module with one the 3rd switch, and when switching signal converted electronegative potential into, the 3rd switch conduction can be accelerated the speed that this switch ends.
8. power supply changeover device as claimed in claim 6 is characterized in that wherein said drive circuit also comprises an isolator that makes this drive signal isolate noise.
9. power supply changeover device as claimed in claim 6; It is characterized in that wherein said drive circuit also comprises an accurate adjuster in position; Can carry out Dc bias to this drive signal and isolate the processing of controlling with voltage quasi position; Have one first capacitor, second capacitor, first resistor, second resistor and one first diode; And this first capacitor, this first resistor are connected with this second resistor in regular turn, and this second capacitor, this first diode are parallelly connected with this second resistor, and the cathodic electricity of this first diode is connected between this first resistor and this second resistor.
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| CN2008100010756A CN101488716B (en) | 2008-01-18 | 2008-01-18 | Driver circuit and power source converter comprising the driver circuit |
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| CN2008100010756A CN101488716B (en) | 2008-01-18 | 2008-01-18 | Driver circuit and power source converter comprising the driver circuit |
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| CN101488716B true CN101488716B (en) | 2012-01-11 |
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| US10630189B1 (en) * | 2018-11-09 | 2020-04-21 | Quanta Computer Inc. | System and method for extending power supply unit holdup time |
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Effective date of registration: 20170222 Address after: Wujin, Changzhou province high tech Industrial Development Zone, 88 Yang Lake Road, No. Patentee after: LITE-ON Technology (Chang Zhou) Co.,Ltd. Patentee after: Lite-On Technology Co.,Ltd. Address before: Taipei City, Taiwan, China Patentee before: Lite-On Technology Co.,Ltd. |
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