CN103887973A - Method and system controlling reverse current to generate power tube voltage stress - Google Patents
Method and system controlling reverse current to generate power tube voltage stress Download PDFInfo
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- CN103887973A CN103887973A CN201210566919.8A CN201210566919A CN103887973A CN 103887973 A CN103887973 A CN 103887973A CN 201210566919 A CN201210566919 A CN 201210566919A CN 103887973 A CN103887973 A CN 103887973A
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Abstract
The invention discloses a method and a system controlling reverse current to generate power tube voltage stress. The system comprises a reverse threshold detection device which is arranged on the secondary side of a DC-DC power supply, and is used for generating a first driving signal to control a reverse control driving device under the condition that reverse current exceeds a predetermined current threshold, and the reverse control driving device which is used for controlling a first power tube and a second power tube no to be in an open or closed state at the same time to control the magnitude of the power tube voltage stress generated by the reverse current. According to the invention, the problems that when the system generates the reverse current, great energy caused by the reverse current generates extreme high voltage spike stress on the closed power tubes; the power tubes are damaged due to avalanche breakdown; and the system reliability is seriously affected are solved; the first power tube and the second power tube alternately in the open or closed state, which prevents the power tubes from damage; and the system reliability is ensured.
Description
Technical field
The present invention relates to communication and field of power electronics, in particular to a kind of method and system of controlling reverse irrigated current generation power tube voltage stress.
Background technology
Shown in Fig. 1 is DC-to-DC (Direct Current-Direct Current, referred to as DC-DC) power supply, and wherein, diagram left side is the former limit input of this power supply, the secondary output that illustrated right side is this power supply.In the situation that input voltage falls rapidly, the energy of secondary output can pour in down a chimney to former limit, and because voltage falls, the driving of control chip is turn-offed, and secondary synchronous rectifier is not opened, and inductive current afterflow path disappears.Because inductive current can not suddenly change, the due to voltage spikes stress on the power conversion success rate pipe of the energy of storing on inductance and output capacitance storage dissipates.Particularly under no-load condition, huge pour in down a chimney energy and can on power tube, produce high spike stress, when serious, cause power tube generation avalanche breakdown and damage, greatly affect the reliability of system.
Summary of the invention
The invention provides a kind of method and system of controlling reverse irrigated current generation power tube voltage stress, at least to solve in correlation technique, when the secondary output of DC-DC power supply produces reverse irrigated current, reverse irrigated current brings huge energy can on power tube, produce high due to voltage spikes stress, cause power tube generation avalanche breakdown and damage, having a strong impact on the problem of the reliability of system.
According to an aspect of the present invention, a kind of system of controlling reverse irrigated current generation power tube voltage stress is provided, comprise: pour in down a chimney threshold test device, be arranged on the secondary of DC-DC power supply, for in the situation that reverse irrigated current exceedes predetermined current threshold value, produce first and drive signal to go driving to pour in down a chimney accessory drive; The described accessory drive that pours in down a chimney, be connected with the first power transistor driver and second power transistor driver of the secondary of described DC-DC power supply, for control the first power tube and the second power tube when different in opening or closing the size of state with the power tube voltage stress controlling described reverse irrigated current and produce.
Preferably, described system also comprises: described in pour in down a chimney threshold test device, also in the situation that described reverse irrigated current exceedes described predetermined current threshold value, produce two driving signal and go to drive and pour in down a chimney energy bleeder; The described energy bleeder that pours in down a chimney, for releasing to described reverse irrigated current according to described two driving signal.
Preferably, it is one of following that described annexation of pouring in down a chimney energy bleeder at least comprises: described in pour in down a chimney energy bleeder and be connected with the reverse irrigated current output of the first inductance and the low level end of outlet side electric capacity, wherein, described the first inductance is arranged on the high level end of described outlet side electric capacity; The described energy bleeder that pours in down a chimney is connected with the reverse irrigated current input of described the first inductance and the high level end of described outlet side electric capacity, and wherein, described and the first inductance is arranged on the low level end of described outlet side electric capacity; The described energy bleeder that pours in down a chimney is connected with the two ends of the second inductance, and wherein, described the second inductance is and the inductance of described the first inductance mutual inductance.
Preferably, described in pour in down a chimney energy bleeder and comprise: driver, the switch of releasing, resistance, wherein, described driver with described in the switch of releasing be connected, described resistance is for the protection of the described energy bleeder that pours in down a chimney.
Preferably, it is one of following that the described switch of releasing at least comprises: metal-oxide layer-semiconductor-field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as MOSFET, or metal-oxide-semiconductor), triode, electric-controlled switch.
Preferably, described in pour in down a chimney energy bleeder and comprise: power transistor driver, metal-oxide-semiconductor, resistance, wherein, described power transistor driver is connected with the grid of described metal-oxide-semiconductor, described resistance is connected with source electrode or the drain electrode of described the 3rd power tube.
Preferably, described in, pouring in down a chimney accessory drive comprises one of following: the pulse generator of two-way misphase, single-chip microcomputer, digital power controller, integrated circuit.
Preferably, the described threshold test device that pours in down a chimney, also for returning at described reverse irrigated current be less than or equal to described predetermined current threshold value in the situation that, produce stop signal pour in down a chimney described in going to drive accessory drive and/or described in pour in down a chimney energy bleeder and quit work.
Preferably, described system applies adopts in the DC-DC power supply of synchronous rectification mode at secondary.
According to an aspect of the present invention, provide a kind of method of controlling reverse irrigated current generation power tube voltage stress, having comprised: detect reverse irrigated current and whether exceed predetermined current threshold value; If so, send drive signal with control the first power tube and the second power tube when different in opening or closing state to control the size of power tube voltage stress of described reverse irrigated current generation.
Preferably, send and drive signal to comprise with the size of the power tube voltage stress of controlling described reverse irrigated current generation in opening or closing state when different to control the first power tube and the second power tube: in the situation that described reverse irrigated current exceedes described predetermined current threshold value, produce described driving signal, wherein, described driving signal is used for controlling the first power transistor driver and the second power transistor driver; Replace according to the first power tube described in described driving signal controlling and described the second power tube in opening or closing the size of the power tube voltage stress that state produces with reverse irrigated current stress and the described reverse irrigated current of the first power tube described in balance and described the second power tube.
Preferably, after whether detection reverse irrigated current exceedes predetermined current threshold value, also comprise: in the situation that described reverse irrigated current exceedes described predetermined current threshold value, discharge described reverse irrigated current by pouring in down a chimney energy bleeder, wherein, described in, pour in down a chimney energy bleeder for described reverse irrigated current is released.
Preferably, described method also comprises: return to be less than or equal to described predetermined current threshold value in the situation that at described reverse irrigated current, produce the size of the power tube voltage stress that stop signal produces with the described reverse irrigated current of removing controls.
Preferably, described method is applied in the DC-DC power supply of secondary employing synchronous rectification mode.
The present invention has adopted the relation of pouring in down a chimney threshold test device and go to detect reverse irrigated current and predetermined current threshold value, and in the situation that reverse irrigated current exceedes predetermined current threshold value, described in driving, pour in down a chimney accessory drive go to control the first power tube and the second power tube when different in opening or closing state, to control the release of described reverse irrigated current, alleviate release strength.By using the present embodiment, while having solved the secondary output generation reverse irrigated current of DC-DC power supply, reverse irrigated current brings huge energy can on power tube, produce high due to voltage spikes stress, cause power tube generation avalanche breakdown and damage, have a strong impact on the problem of the reliability of system, by making the first power tube and the second power tube alternately in opening or closing state, and then avoid power tube to be damaged, guaranteed the reliability of system.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the circuit of the DC-DC power supply of correlation technique and the reverse irrigated current flow direction;
Fig. 2 is the structured flowchart one that produces the system of power tube voltage stress according to the control reverse irrigated current of the embodiment of the present invention;
Fig. 3 is the structured flowchart two that produces the system of power tube voltage stress according to the control reverse irrigated current of the embodiment of the present invention;
Fig. 4 is the flow chart one that produces the method for power tube voltage stress according to the control reverse irrigated current of the embodiment of the present invention;
Fig. 5 is the flowchart 2 that produces the method for power tube voltage stress according to the control reverse irrigated current of the embodiment of the present invention;
Fig. 6 is the circuit diagram that suppresses according to the preferred embodiment of the invention the system of reverse irrigated current generation power tube voltage stress;
Fig. 7 is that the signal that pours in down a chimney according to the preferred embodiment of the invention threshold test device flows to schematic diagram;
Fig. 8 is that the signal that pours in down a chimney according to the preferred embodiment of the invention energy bleeder flows to and structural representation;
Fig. 9 is that the signal that pours in down a chimney according to the preferred embodiment of the invention accessory drive flows to schematic diagram;
Figure 10 pours in down a chimney the intention one that energy bleeder connected node shows according to the preferred embodiment of the invention;
Figure 11 is the schematic diagram two that pours in down a chimney according to the preferred embodiment of the invention energy bleeder connected node;
Figure 12 is two signal graphs that driver is alternately opened according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
When secondary output based on DC-DC power supply in correlation technique produces reverse irrigated current, reverse irrigated current brings huge energy can on power tube, produce high due to voltage spikes stress, cause power tube generation avalanche breakdown and damage, have a strong impact on the problem of the reliability of system, the present embodiment provides a kind of system of controlling reverse irrigated current generation power tube voltage stress, the structured flowchart of this system as shown in Figure 2, comprising:
Pour in down a chimney threshold test device 10, be arranged on the secondary of DC-DC circuit, for exceed predetermined current threshold value at reverse irrigated current in the situation that, produce first and drive signal to go to drive to pour in down a chimney accessory drive;
Pour in down a chimney accessory drive 20, be connected with the first power transistor driver 1 and second power transistor driver 2 of the secondary of DC-DC circuit, for control the first power tube 3 and the second power tube 4 when different in opening or closing the size of state with the power tube voltage stress controlling reverse irrigated current and produce.
The present embodiment has adopted the relation of pouring in down a chimney threshold test device 10 and go to detect reverse irrigated current and predetermined current threshold value, and in the situation that reverse irrigated current exceedes predetermined current threshold value, driving pour in down a chimney accessory drive 20 go to control the first power tube 3 when different with the second power tube 4 in opening or closing state, the intensity of the power tube voltage stress producing with control reverse irrigated current, alleviates release strength.By using the present embodiment, while having solved the secondary output generation reverse irrigated current of DC-DC power supply, if close by force power tube, reverse irrigated current brings huge energy can on power tube, produce high due to voltage spikes stress, causes power tube generation avalanche breakdown and damages; If keep power tube often to open, power tube will bear larger current stress, and these two kinds of measures all can have a strong impact on the problem of system reliability.By making the first power tube 3 and the second power tube 4 alternately in opening or closing state, and then avoid power tube to be damaged, guaranteed the reliability of system.
In the time arranging, above-mentioned pour in down a chimney accessory drive 20 and can realize in many ways, for example, the pulse generator of two-way misphase, single-chip microcomputer, digital power controller, integrated circuit etc.
As shown in Figure 1, may also be referred to as the first synchronous rectifier by controlling the first power tube 3() and the second power tube 4(may also be referred to as the second synchronous rectifier) be to prevent that power tube generation avalanche breakdown from damaging a kind of mode of realization, in order further to reduce the impaired risk of power tube, in a preferred embodiment, said apparatus can also be as shown in Figure 3, also comprise and pour in down a chimney energy bleeder 30, wherein, pour in down a chimney threshold test device 20, also in the situation that reverse irrigated current exceedes predetermined threshold value, producing two driving signal goes driving to pour in down a chimney energy bleeder, pour in down a chimney energy bleeder 30, for reverse irrigated current being released according to two driving signal.
In the time that energy bleeder 30 is poured in down a chimney in setting, can be connected pouring in down a chimney the reverse irrigated current output (C point) of energy bleeder 30 with the first inductance 5 and the low level end (D point) of outlet side electric capacity 6, the energy bleeder 30 that pours in down a chimney connecting by which can be from the secondary circuit reverse irrigated current of releasing, and then reduce the powerful energy that reverse irrigated current produces, and then reduce the power tube voltage stress that reverse irrigated current produces.Preferably, can also be connected with the two ends of the second inductance pouring in down a chimney energy bleeder 30, wherein, the second inductance is and the inductance of the first inductance 5 mutual inductances, connect and then the reverse irrigated current of releasing by this kind of mode, can reduce the powerful energy that reverse irrigated current produces by the mode of mutual inductance.
Pouring in down a chimney energy bleeder 30 can realize by the mode of circuit; for example; this pours in down a chimney energy bleeder 30 can comprise conversion driver; the switch of releasing; resistance; wherein, this conversion driver is for controlled discharge switch, and to pour in down a chimney energy bleeder in a safe condition for the protection of described for described resistance.Wherein, the switch of releasing can comprise multiple, for example, metal-oxide-semiconductor, triode, electric-controlled switch etc., but be not limited to this.
In the time that the above-mentioned switch of releasing is metal-oxide-semiconductor, driver is power transistor driver, and this power transistor driver is connected with the grid of metal-oxide-semiconductor, and resistance can arbitrarily be arranged on high level output side or the low level output side of power tube.
After the adjusting of the system by above-mentioned control reverse irrigated current, reverse irrigated current returns to while being less than or equal to predetermined threshold value, pours in down a chimney threshold test device 10 and produces stop signal and go to drive to pour in down a chimney accessory drive 20 and/or pour in down a chimney energy bleeder 30 to quit work.
The present embodiment also provides a kind of method of controlling reverse irrigated current generation power tube voltage stress, and the method goes for the system of above-mentioned control reverse irrigated current, and the flow process of the method can be as shown in Figure 4, comprises that step S402 is to step S404.
Step S402, detects reverse irrigated current and whether exceedes predetermined current threshold value;
Step S404, if so, send drive signal with control the first power tube and the second power tube when different in opening or closing state to control the size of power tube voltage stress of reverse irrigated current generation.
In implementation process, step S404 may further include following process: in the situation that reverse irrigated current exceedes predetermined current threshold value, produce and drive signal, wherein, drive signal to be used for controlling the first power transistor driver and the second power transistor driver; According to drive that signal controlling the first power tube and the second power tube replace in opening or closing current stress and the due to voltage spikes stress of state with balance the first power tube and the second power tube.In a preferred embodiment, said process can also as shown in Figure 5, also comprise step S406,, in the situation that reverse irrigated current exceedes predetermined current threshold value, can also discharge reverse irrigated current by pouring in down a chimney energy bleeder.
Through the adjustment of said method, when reverse irrigated current returns to while being less than or equal to predetermined current threshold value, produce the release of stop signal with the reverse irrigated current of removing controls, the power tube of secondary output has not now had breakdown and danger that damage.
The diagram of the secondary of mentioning in above-described embodiment is full-wave rectification diagram, certainly can also comprise full-bridge rectification, doubly flow the form such as rectification, mixed-rectification, as long as its secondary be synchronous rectification can adopt said method, those skilled in the art can design according to actual conditions.Below in conjunction with preferred embodiment, the present invention will be described.
Preferred embodiment
This preferred embodiment relates to the method and system that suppresses reverse irrigated current generation power tube voltage stress, and the method is controlled and releases by system is produced to reverse irrigated current, suppresses reverse irrigated current and produces power tube voltage stress.The method is mainly controlled the reverse irrigated current producing due to situations such as input voltage fall rapidly in DC-DC power supply, suppresses the due to voltage spikes stress that reverse irrigated current produces on power tube.
The circuit diagram that the inhibition reverse irrigated current that the present embodiment proposes produces the system of power tube voltage stress can as shown in Figure 6, can comprise following components: pour in down a chimney threshold test device, pour in down a chimney accessory drive and pour in down a chimney energy bleeder.Wherein, pouring in down a chimney threshold test device detection system reverse irrigated current triggers to pour in down a chimney energy bleeder and pour in down a chimney accessory drive and starts and the threshold condition of power cut-off; Pour in down a chimney energy bleeder and comprise a driver, a resistance and a power tube; Pour in down a chimney accessory drive and produce pulsed drive, carry out opening and turn-offing of power ratio control pipe.
The circuit that the present embodiment provides is simple, and effectively, and cost is low.Next the said system in connection with accompanying drawing, this preferred embodiment being provided is set forth, and describes for the implementation method of this system.
The operation principle of the present embodiment is: in the time that system is poured in down a chimney generation, now former secondary drives signal to disappear.The threshold test device that pours in down a chimney shown in Fig. 7 detects that system pours in down a chimney the electric current of generation and exceed default threshold condition, from this right side and left side output signal respectively of pouring in down a chimney threshold test device, send the accessory drive that pours in down a chimney shown in energy bleeder and Fig. 9 that pours in down a chimney shown in Fig. 8 to by pouring in down a chimney commencing signal.
Pouring in down a chimney commencing signal arrives when pouring in down a chimney energy bleeder, can release by several different methods, for example, as shown in Figure 8, pour in down a chimney energy bleeder and receive and pour in down a chimney commencing signal, export high level by inner drive, power tube is opened, a part is poured in down a chimney to energy and release by resistance and power tube, when resistance plays metering function, also dissipate with the form of heat by resistance gradually pouring in down a chimney energy.Can being connected to outputting inductance front end C point and D point (as shown in figure 10) or being connected to E point and the F point (as shown in figure 11) of coupling inductance by inductance coupling high of the A that pours in down a chimney energy bleeder shown in Fig. 8 and two terminals of B.Certainly, above-mentioned implementation be all one preferred embodiment, can carry out different settings according to actual conditions.
Meanwhile, pouring in down a chimney commencing signal arrives when pouring in down a chimney accessory drive, as shown in Figure 9, concerning driver Driver5, the Driver6 of secondary power tube, now the driven of driving governor is turn-offed, and pours in down a chimney accessory drive output two-way misphase formula pulsed drive, two-way power tube is alternately opened, help pours in down a chimney that energy that energy bleeder do not release is completely logical is sent to input, and wherein, the signal graph that Driver5 and Driver6 alternately open can be as shown in figure 12.The implementation method of output two-way misphase formula pulsed drive can produce by the pulse generator of two-way misphase, single-chip microcomputer, digital power control signal or application-specific integrated circuit (ASIC).The frequency of misphase formula pulsed drive and duty ratio can regulate by circuit setting.The power tube of alternately opening, has shared current stress, and if now power tube often open, power tube will bear larger current stress; Power tube often closes, and larger due to voltage spikes stress can bring impact to power tube.Pulsed drive balance current stress and the due to voltage spikes stress of power tube.
Detect that when pouring in down a chimney threshold test device system pours in down a chimney energy to certain threshold value, think to pour in down a chimney and disappear or be relieved to a certain degree, when pouring in down a chimney energy and can not reproducing success rate tip peak stress and exceed standard and produce the risk of damage, send cut-off signals to pouring in down a chimney energy bleeder and pouring in down a chimney accessory drive, its work is stopped, and system is recovered normal condition.
The energy bleeder part of can releasing of pouring in down a chimney of the present embodiment is poured in down a chimney energy, and the energy that makes to flow through power tube is less, can suppress like this to pour in down a chimney the due to voltage spikes stress that energy produces on power tube.Meanwhile, misphase formula pulsed drive is dredged between stifled and replace switching at energy, has also produced the effect of inhibition voltage stress in the power down stream energy of releasing.
As can be seen from the above description, the present invention has realized following technique effect:
The embodiment of the present invention can be shunted pouring in down a chimney energy, make to flow through power tube to pour in down a chimney energy less, suppressed the voltage stress on power tube; Voltage stress and the current stress that can also take into account by misphase formula pulsed drive balanced power pipe, make system works safe and reliable, and circuit is realized simple, with low cost.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (14)
1. control the system that reverse irrigated current produces power tube voltage stress, it is characterized in that, comprising:
Pour in down a chimney threshold test device, be arranged on the secondary of DC-to-DC DC-DC power supply, for exceed predetermined current threshold value at reverse irrigated current in the situation that, produce first and drive signal to go to drive to pour in down a chimney accessory drive;
The described accessory drive that pours in down a chimney, be connected with the first power transistor driver and second power transistor driver of the secondary of described DC-DC power supply, for control the first power tube and the second power tube when different in opening or closing the size of state with the power tube voltage stress controlling described reverse irrigated current and produce.
2. system according to claim 1, is characterized in that, also comprises:
The described threshold test device that pours in down a chimney, also in the situation that described reverse irrigated current exceedes described predetermined current threshold value, produces two driving signal and goes driving to pour in down a chimney energy bleeder;
The described energy bleeder that pours in down a chimney, for releasing to described reverse irrigated current according to described two driving signal.
3. system according to claim 2, is characterized in that, described in pour in down a chimney energy bleeder annexation at least comprise one of following:
The described energy bleeder that pours in down a chimney is connected with the reverse irrigated current output of the first inductance and the low level end of outlet side electric capacity, and wherein, described and the first inductance is arranged on the high level end of described outlet side electric capacity;
The described energy bleeder that pours in down a chimney is connected with the reverse irrigated current input of described the first inductance and the high level end of described outlet side electric capacity, and wherein, described and the first inductance is arranged on the low level end of described outlet side electric capacity;
The described energy bleeder that pours in down a chimney is connected with the two ends of the second inductance, and wherein, described the second inductance is and the inductance of described the first inductance mutual inductance.
4. system according to claim 2, is characterized in that, described in pour in down a chimney energy bleeder and comprise: driver, the switch of releasing, resistance, wherein, described driver with described in the switch of releasing be connected, described resistance is for the protection of the described energy bleeder that pours in down a chimney.
5. system according to claim 4, is characterized in that, described in the switch of releasing at least comprise one of following: metal-oxide layer-semiconductor-field effect transistor M OS pipe, triode, electric-controlled switch.
6. system according to claim 5, is characterized in that, described in pour in down a chimney energy bleeder and comprise: power transistor driver, described metal-oxide-semiconductor, resistance, wherein, described power transistor driver is connected with the grid of described metal-oxide-semiconductor, and described resistance is connected with source electrode or the drain electrode of described metal-oxide-semiconductor.
7. system according to claim 1, is characterized in that, described in pour in down a chimney accessory drive and comprise one of following:
The pulse generator of two-way misphase, single-chip microcomputer, digital power controller, integrated circuit.
8. according to the system described in any one in claim 1 to 7, it is characterized in that,
The described threshold test device that pours in down a chimney, also for returning at described reverse irrigated current be less than or equal to described predetermined current threshold value in the situation that, produce stop signal pour in down a chimney described in going to drive accessory drive and/or described in pour in down a chimney energy bleeder and quit work.
9. according to the system described in any one in claim 1 to 7, it is characterized in that, described system applies adopts in the DC-DC power supply of synchronous rectification mode at secondary.
10. control the method that reverse irrigated current produces power tube voltage stress, it is characterized in that, comprising:
Detect reverse irrigated current and whether exceed predetermined current threshold value;
If so, send drive signal with control the first power tube and the second power tube when different in opening or closing state to control the size of power tube voltage stress of described reverse irrigated current generation.
11. methods according to claim 10, is characterized in that, send and drive signal to comprise with the size of the power tube voltage stress of controlling described reverse irrigated current generation in opening or closing state when different to control the first power tube and the second power tube:
In the situation that described reverse irrigated current exceedes described predetermined current threshold value, produce described driving signal, wherein, described driving signal is used for controlling the first power transistor driver and the second power transistor driver;
Replace according to the first power tube described in described driving signal controlling and described the second power tube in opening or closing the size of the power tube voltage stress that state produces with reverse irrigated current stress and the described reverse irrigated current of the first power tube described in balance and described the second power tube.
12. methods according to claim 11, is characterized in that, after whether detection reverse irrigated current exceedes predetermined current threshold value, also comprise:
In the situation that described reverse irrigated current exceedes described predetermined current threshold value, discharge described reverse irrigated current by pouring in down a chimney energy bleeder, wherein, described in pour in down a chimney energy bleeder for described reverse irrigated current is released.
13. according to claim 10 to the method described in any one in 12, it is characterized in that, also comprises:
Return to be less than or equal to described predetermined current threshold value in the situation that at described reverse irrigated current, produce the size of the power tube voltage stress that stop signal produces with the described reverse irrigated current of removing controls.
14. according to claim 10 to the method described in any one in 12, it is characterized in that, described method is applied in the DC-to-DC DC-DC power supply that secondary adopts synchronous rectification mode.
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| CN201210566919.8A CN103887973B (en) | 2012-12-24 | 2012-12-24 | Reverse irrigated current is controlled to generate the method and system of power tube voltage stress |
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| CN105337260A (en) * | 2014-08-13 | 2016-02-17 | 中兴通讯股份有限公司 | Backward flowing current control method, backward flowing current control circuit and power converter |
| CN106877677A (en) * | 2017-04-10 | 2017-06-20 | 深圳市永联科技股份有限公司 | A kind of converter control circuit being self-regulated with bi-directional synchronization rectification and dead band |
| CN109085412A (en) * | 2017-06-14 | 2018-12-25 | 圣邦微电子（北京）股份有限公司 | A kind of opposite current detection circuit |
| CN109217241A (en) * | 2018-10-17 | 2019-01-15 | 郑州云海信息技术有限公司 | A kind of device and method for preventing reverse current from leading to overshoot voltage |
| CN111654010A (en) * | 2019-12-17 | 2020-09-11 | 联合汽车电子有限公司 | Method for preventing back-flow current |
| CN115314451A (en) * | 2022-08-23 | 2022-11-08 | 中国电子科技集团公司第十研究所 | Method for processing insufficient power supply caused by reverse current flow of domestic SRIO (serial peripheral input output) switching chip |
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| CN105337260A (en) * | 2014-08-13 | 2016-02-17 | 中兴通讯股份有限公司 | Backward flowing current control method, backward flowing current control circuit and power converter |
| CN106877677A (en) * | 2017-04-10 | 2017-06-20 | 深圳市永联科技股份有限公司 | A kind of converter control circuit being self-regulated with bi-directional synchronization rectification and dead band |
| CN106877677B (en) * | 2017-04-10 | 2020-07-03 | 深圳市永联科技股份有限公司 | Converter control circuit with bidirectional synchronous rectification and dead-zone self-regulation |
| CN109085412A (en) * | 2017-06-14 | 2018-12-25 | 圣邦微电子（北京）股份有限公司 | A kind of opposite current detection circuit |
| CN109217241A (en) * | 2018-10-17 | 2019-01-15 | 郑州云海信息技术有限公司 | A kind of device and method for preventing reverse current from leading to overshoot voltage |
| CN111654010A (en) * | 2019-12-17 | 2020-09-11 | 联合汽车电子有限公司 | Method for preventing back-flow current |
| CN115314451A (en) * | 2022-08-23 | 2022-11-08 | 中国电子科技集团公司第十研究所 | Method for processing insufficient power supply caused by reverse current flow of domestic SRIO (serial peripheral input output) switching chip |
| CN115314451B (en) * | 2022-08-23 | 2023-06-06 | 中国电子科技集团公司第十研究所 | Method for treating insufficient power-down caused by current backflow of domestic SRIO exchange chip |
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