CN1728491A - Power source protector - Google Patents
Power source protector Download PDFInfo
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- CN1728491A CN1728491A CNA2005100876420A CN200510087642A CN1728491A CN 1728491 A CN1728491 A CN 1728491A CN A2005100876420 A CNA2005100876420 A CN A2005100876420A CN 200510087642 A CN200510087642 A CN 200510087642A CN 1728491 A CN1728491 A CN 1728491A
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- power supply
- winding
- switch
- excessive voltage
- voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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Abstract
The invention provides a power supply protector. A flyback switch power supply comprises: a control part (2) which controls a switch; an oversize voltage detection part (6) which detects the output voltage of an auxiliary winding (4a) of a switch transformer (4) and enables the control part (2) to stop continuously when a certain level is exceeded; and a feedback part which feeds back the secondary side output of the switch transformer (4) to the control part (2). The switch transformer (4) comprises a forward winding oversize voltage detection winding (4b). When an oversize voltage is applied, a control power supply is stopped continuously and a switch element (3) is protected. Thus, when a voltage exceeding the guaranteed range is supplied to the power supply, the invention can stop the action of the power supply stably with low cost, thereby surely protecting internal elements like the switch element.
Description
Technical field
The present invention relates to obtain the protective device (after, abbreviate [power protecting circuit] as) of the Switching Power Supply of electrical power by HF switch.
Background technology
The withstand voltage protection hypothesis of main switch element is in the past implemented in the country that has as power supply as the Japan of the source power supply of 100V, 200V.The formation of the withstand voltage protection of such main switch element as the 1st configuration example, is by by applying certain above voltage, becomes that the electric current fuse of the surge absorber of short-circuit mode and the failure of current circuit when becoming short-circuit mode constitutes.As the 2nd configuration example, employing is set in large-scale wide input standard with input voltage range and constitutes.As the 3rd configuration example, detect and apply excessive voltage, cut off the formation (for example, with reference to patent documentation 1 to 3) of circuit by switch element.In the following description, certain above voltage or excessive voltage are meant that the input that is higher than power supply guarantees the voltage of scope.
Fig. 6 is the circuit diagram of the protective device of general inverse-excitation type switch power-supply in the past, and Fig. 7 is the action waveforms of its representative.Fig. 7 (a) expression is to the input switch action of the primary side winding of switch transformer, and (b) expression provides the time to the anti-electrical power that swashs winding of primary side.
The anti-typical example that swashs the protective device of (flyback) formula Switching Power Supply in the past describes for its formation and action with reference to Fig. 6 and Fig. 7.In the formation shown in this figure, will carry out HF switch control by 2 pairs of switch elements of control part 3 by the dc voltage of rectifier 1 rectification as power supply, instead swash the winding power supply to the primary side of switch transformer 4.
In power initiation, provide certain electric current from start-up circuit.Just, surpass certain value by making primary side DC input, switch element 3 beginning switch motions constitute like this.Behind the power initiation, the voltage Vds that will be obtained by the input current Id from the auxiliary winding of switch transformer 4 continues switch motion as control power supply.In inverse-excitation type DC transducer, during the ON of the main switch element of in the Ton1 of Fig. 7, representing 3, stored energy in switch transformer 4, during OFF, shown in the output current Id shown in Fig. 7 (b), carry out providing the action of electrical power to discharge by repeat electrical power in HF switch to primary side.Further, make primary side output stable by making the primary side output voltage by control part 2 feedbacks of feedback section 5 to primary side.
Herein, use and the Switching Power Supply of design as exchanging 100V for the source power supply that uses, when because construction wrong etc. has applied exchanges under the situation of 200V, direct voltage after the rectification is to have applied 2 times voltage just often, surpassed the withstand voltage of switch element, perhaps load is under the situation of the such machine of frequency conversion type independence air-conditioning, and the off-premises station of using to interchange 100V has applied interchange 200V, and the withstand voltage of exterior product will become problem.
Patent documentation 1: the spy opens clear 62-225165 communique;
Patent documentation 2: the spy opens flat 11-83116 communique;
Patent documentation 3: the spy opens the 2000-346427 communique.
In the 1st configuration example of above-mentioned conventional art, along with the reparation of damage of product, machine needs replacement of products.In the 2nd configuration example, when high withstand voltageization of main switch element was necessary, on a large scale, in order to satisfy adjustment criteria, it is complicated that the winding standard of switch transformer etc. becomes, and any situation all is the main cause that product cost is risen.
In the patent documentation 1 of the 3rd configuration example, put down in writing and designed excessive voltage and detect with winding and excessive voltage and detect special-purpose circuit, when the voltage input surpasses certain value when above, according to the detection voltage of its correspondence, make excessive voltage and detect special circuit, main switch element is stopped.In addition, in the configuration example of patent documentation 2 and patent documentation 3, put down in writing by effect, when the voltage that applies more than certain at the excessive voltage testing circuit of power supply primary side design, by cutting off the part of secondary-side circuitry, prevent the influence of excessive voltage.The configuration example of these patent documentations 1～3 is by detecting applying of excessive voltage, making power supply stop to come the formation of protection switch element.In such formation, stop by the action that makes switch element, the output that makes primary side and excessive voltage detect winding descends.Therefore, become the excessive voltage testing result is reset, Switching Power Supply begins to move such repetitive operation once more, that is, provide by the electrical power of excessive voltage to load, continuously continues.
In addition, any one of patent documentation 2 and 3 configuration example all is by cutting off the power supply secondary-side circuitry after the excessive voltage testing circuit, prevents because the technology to the destruction of secondary-side circuitry of applying of excessive voltage.But, in such formation, to the state that is still continuation that applies of the excessive voltage of primary side input.In addition, in the formation of patent documentation 1～3,, the action of not determining the machine of stop reason is stopped owing to only finished protection to excessive voltage at the power supply periphery.Therefore, as the user, having very difficult resolution stop reason is unusual such problem that excessive voltage applies.
Summary of the invention
The present invention is in order to solve the invention of above-mentioned problem in the past; its purpose is; provide a kind of when power supply has been applied excessive voltage; with low-cost, stably stop the action of power supply, when preventing the damage of parts of switch element etc., also prevented power protecting circuit to the influence of secondary-side circuitry.Further, its purpose be to provide a kind of expression be excessive voltage apply unusual, make the user understand the power protecting circuit of stop reason easily.
In order to solve above-mentioned problem in the past, the invention is characterized in, by merging, detect excessive voltage accurately to normal shock (forword) winding of the variation sensitivity of primary side input voltage with to the anti-output that swashs (flyback) winding of the variation sensitivity of primary side output voltage.Specifically, the apparatus for protecting power supply according to the 1st mode of the present invention is the protective device that load is provided the inverse-excitation type switch power-supply of electrical power.With direct current energy as power supply, comprising the switch element that carries out the HF switch action, control the control part of the HF switch action of described switch element, the electrical power that HF switch action by described switch element obtains is as the input to the primary side winding, obtain the switch transformer of electrical power that the primary side winding is provided, the primary side of described switch transformer being exported the output of winding feeds back to described control part, make in the Switching Power Supply of the stable feedback section of this primary side output, the primary side winding of switch transformer comprises: output provides at least 1 output winding of the low pressure that electrical power uses to described load, instead the swashing of power supply that provides described control part to use assisted winding, for the excessive voltage that detects excessive voltage detects winding.It is the winding that twines with described anti-sharp normal shock of assisting winding to import side by side that this excessive voltage detects winding.
Be further characterized in that, comprise the excessive voltage test section, when it detects the composite value of the output voltage of excessive voltage detection winding and the output voltage that instead swashs auxiliary winding, judge whether this composite value is greater than certain above level, described control part will instead swash the output voltage of auxiliary winding as power supply, switch element is carried out HF switch control, the excessive voltage test section, when the composite value of judging output voltage is level more than certain, latch its state, make the action of described control part continue to stop.
In above-mentioned the 1st mode, also can be used as the excessive voltage test section is arranged on formation in the control part.
Apparatus for protecting power supply according to the 2nd mode of the present invention is characterised in that; in the 1st mode of the present invention; the excessive voltage test section is independent with control part; be arranged on the primary side of described switch transformer; outlet side at described excessive voltage test section has connected microcomputer; when this microcomputer detects unusual that excessive voltage applies, stop the action of described control part, become holding state.
In above-mentioned the 2nd mode, also can be that the outlet side at microcomputer has connected display part, this display part is as unusual the constituting that shows that the excessive voltage that detected by microcomputer applies.
Apparatus for protecting power supply according to the 3rd mode of the present invention is characterised in that; in the 2nd mode of the present invention; comprise connecting when having the input part of certain dc resistance that have the bypass section of the handoff functionality that is connected side by side with described input part, this bypass section is controlled by microcomputer.
(effect of invention)
According to the apparatus for protecting power supply of the 1st mode of the present invention, under the situation that has applied excessive voltage, stop constantly by the switch motion that makes power supply, in the protection main switch element, can eliminate influence to the later circuit of primary side.
According to the apparatus for protecting power supply of the 2nd mode of the present invention, transmit by excessive voltage being detected to microcomputer as the main control unit of machine, for example prevent that the excessive voltage to air-conditioner outdoor unit from applying the infringement expansion of the machine that waits.In addition, by showing its result, can inform which type of problem has taken place the user of machine.
Apparatus for protecting power supply according to the 3rd mode of the present invention; the input part and the bypass section that makes its input part biasing that have necessarily above dc resistance by setting; when excessive voltage applies; the input voltage that will reduce because will be descended by the voltage of its D.C. resistance is applied to power supply, so can also comprise the withstand voltage protection of the Switching Power Supply primary side product of rectification circuit product.
Description of drawings
Fig. 1 is the pie graph of the apparatus for protecting power supply in the embodiments of the present invention 1.
Fig. 2 is the representative oscillogram that the normal shock of the formation of Fig. 1 moves.
Fig. 3 is the voltage oscillogram that the excessive voltage test section to the formation of Fig. 1 applies.
Fig. 4 is the pie graph of the apparatus for protecting power supply in the embodiments of the present invention 2.
Fig. 5 is the pie graph of the apparatus for protecting power supply in the embodiments of the present invention 3.
Fig. 6 is the pie graph of apparatus for protecting power supply in the past.
Fig. 7 is the anti-exciting representative oscillogram of doing of the formation of Fig. 6.
Among the figure: the 1-rectifier, the 2-control part, the 3-switch element, the 4-switch transformer, 4a-assists winding, the 4b-excessive voltage detects winding, and 4c-exports winding, 5-feedback section, 6-excessive voltage test section, the 7-microcomputer, 8-display part, 9-input part, 10-bypass section.
Embodiment
Below, describe for embodiments of the present invention with reference to accompanying drawing.To also have, element common in each figure is adopted prosign, for the explanation that repeats, in order simply omitting.
(execution mode 1)
Fig. 1 is the pie graph of the apparatus for protecting power supply in embodiments of the present invention 1, and Fig. 2 is that it represents movement oscillogram, and Fig. 3 is the oscillogram of an example of the variation of the voltage that applies to the excessive voltage test section of expression.Below, describe referring to figs. 1 through Fig. 3 for the formation and the action of the apparatus for protecting power supply of execution mode 1.
About the basic comprising of the apparatus for protecting power supply of present embodiment 1 as shown in Figure 1; the rising that comprises the dc voltage of importing by primary side starts; according to starting the voltage Vds that the output current Id1 of back by the auxiliary winding 4a of the switch transformer 4 of primary side feedback generates, the inverse-excitation type switch power-supply that switch motion is continued.
In present embodiment 1, above-mentioned inverse-excitation type switch power-supply is characterised in that, with as offer control power supply that control part uses anti-swash the auxiliary winding 4a that twines side by side, be connected the excessive voltage that normal shock twines and detected winding 4b.
In this inverse-excitation type switch power-supply, when control part 2 comprises excessive voltage test section 6, the output Id1 of auxiliary winding 4a as power supply, is carried out HF switch control to the main switch element 3 of FET etc.Excessive voltage test section 6 detects the output voltage of auxiliary winding 4a, when this output voltage becomes level more than certain, latchs its state, makes control part 2 continue to stop.
That is, excessive voltage test section (6) can be to comprise: voltage level judging part (6a), and it judges whether the output voltage values that detects is certain above level; Latch cicuit (6b), when it is certain above level when the voltage detecting value, its output state of maintenance till the input that other is arranged; , shearing device (6c), it cuts off Switching Power Supply forcibly, makes relay that the action of control part (2) continues to stop etc.Like this, in present embodiment 1, when having applied excessive voltage, because excessive voltage test section 6 stops Switching Power Supply forcibly, and make and stop to continue, so machine is in the state that all actions are not carried out.Also have, above-mentioned voltage level is judged, is latched and shearing device also can be by being implemented by microcomputer control.
At least 1 output winding 4c that switch transformer 4 comprises output low pressure is exported and the corresponding low pressure of its winding standard in primary side by the HF switch of main switch element 3, offers load.Further, switch transformer 4 comprises the auxiliary winding 4a of the power supply that the generation control part is used and imports the excessive voltage detection winding 4b that the ground normal shock twines side by side with auxiliary winding.Feedback section 5 is fed back the output voltage of the primary side output winding 4c of switch transformer 4 to the control part 2 of primary side, make primary side output stable.
In the above-described configuration, after Switching Power Supply started, the voltage Vds that is obtained by the output current Id1 of the auxiliary winding 4a of switch transformer 4 continued switch as control power supply.Promptly during the ON of the main switch element shown in the Ton1 of Fig. 23, stored energy in switch transformer 4 during OFF, by by the action that repeats to provide to primary side electrical power in HF switch, is carried out the release of electrical power.Further, as shown in Figure 2, in Ton1 during the ON of the main switch element 3 of the time that electrical power is provided as the primary side that detects from winding 4b to the excessive voltage of normal shock winding, generate the output current Id2 that excessive voltage detects winding 4b.
In addition, excessive voltage detects the standard of winding 4b, the input of the power supply of design guarantees scope (for example less than exchanging 150) using as interchange 100V, its output voltage (Vd2 of Fig. 3) is exported below (Vd1 of Fig. 3) with auxiliary winding for power supply, when exchanging the minimum value of 200V (considering that under-15% the situation be 175V), reach excessive voltage and detect level like this.
Fig. 3 represents an example of the change in voltage that applies to excessive voltage test section 6.Shown in figure, usually, power supply is the time of ON with the anti-sharp winding output Vd1 of auxiliary winding 4a at main switch element 3, in switch transformer, keep as magnetic energy, in the time of OFF, discharge to primary side as electrical power, carry out such action, the output Vd2 of normal shock winding (excessive voltage detects winding 4b) carries out the action opposite with described Vd1.By above action, the anti-winding 4a of swashing is connected side by side with normal shock winding 4b, its synthetic output is as the primary side power supply, as the control part power supply.By with this primary side power supply output input excessive voltage test section 6, such formation is reacted in the variation of primary side input voltage sensitively.
Further, when excessive voltage detection department 6 when detecting excessive voltage, when keeping the excessive voltage testing result by latch cicuit (6b), cuts off Switching Power Supply by voltage level judging part (6a) forcibly, make the action of control part 2 continue to stop.Thus; for example; under the state that exchanges the 100V standard; applied when exchanging the source power supply of 200V; can be rapidly and shutdown switch power supply exactly; can protect the circuit after main switch element and the Switching Power Supply, make it does not doubled that the such excessive voltage of voltage applies and the damage that parts are brought that causes.Also have, in the present embodiment, as power supply, the configuration example of rectification circuit that employing is equipped with the AC power of DC power supply is illustrated, but also can be the configuration example that has adopted the DC power supply of the continuous-current plant that adds or battery etc.
(execution mode 2)
Fig. 4 is the pie graph about the apparatus for protecting power supply of embodiments of the present invention 2.Below, describe with reference to Fig. 4 for the formation and the action of the apparatus for protecting power supply of execution mode 2.
In Fig. 4, the apparatus for protecting power supply of execution mode 2 is provided with and control part 2 excessive voltage test section 6 independently, and the testing result of its output voltage is by microcomputer 7 monitoring of the control of carrying out machine.For example, when detecting the excessive voltage of voltage when doubling voltage and applying etc., stop whole control, become holding state.In addition, as with display part 8 that microcomputer 7 links to each other on, the sudden strain of a muscle of the carrying out specific supervision LED formation of such abnormal show of going out.
In execution mode 1, applied under the situation of excessive voltage, excessive voltage test section 6 stops Switching Power Supply forcibly, and stops to continue in order to make, and machine is in the state that all actions are not carried out.That is,, also be in the state that to judge the machine stop reason even the user of machine has for example applied such the applying not at that time of 200V on the machine of 100V standard.
In present embodiment 2, by making machine be in holding state, unusual output to the power supply secondary-side circuitry applies, frequency conversion type independence air-conditioning such further with source power supply in system that subordinate provides etc., can prevent to enlarge owing to the excessive voltage that doubles voltage etc. applies the infringement that brings.
In addition, by display abnormality, the user can judge immediately owing to double voltage and apply and make machine be in halted state, can be early construction wrong etc. be taken some countermeasures.
In addition, because excessive voltage detects when normal input and also works usually, so detect in the formation of excessive voltage in primary side, electric power loss is big, the standby electrical power increases, but, can make because the electric power consumption that testing circuit brings reduces by adopting the formation of carrying out the detection of excessive voltage at the circuit of primary side.
(execution mode 3)
Fig. 5 is the pie graph about the apparatus for protecting power supply of embodiments of the present invention 3.Below, describe with reference to Fig. 5 for the formation and the action of the apparatus for protecting power supply of execution mode 3.
In Fig. 5, the apparatus for protecting power supply of execution mode 3 is characterised in that, comprising: input part 9 it make the rectification circuit 1 that produces circuit as direct voltage have certain dc resistance R; Bypass section 10, it has translation function with described 9 arranged side by side connections of input part.This bypass section 10 is by microcomputer 7 controls.According to such formation, when doubling the such excessive voltage of voltage and apply, the D.C. resistance part R that is had by input part 9 produces voltage and descends, because voltage descends, descends to the input of rectification circuit 1.That is, become below the maximum of input assurance to the voltage that Switching Power Supply applies.
In the formation of such execution mode 3, there is no need to consider that product is withstand voltage in the situation that applies the excessive voltage when doubling voltage status, can make cost decreases.
In addition, when applying normal input voltage (exchanging 100V),, make input part 9 short circuits, make Switching Power Supply work as normal input by making bypass section 10 actions.
(in the possibility of industrial application)
Can be applicable to by HF switch generative circuit voltage about apparatus for protecting power supply of the present invention In the time of Switching Power Supply, also can be applicable in the applied for machines of using as the power supply of controlling its power supply.
Claims (5)
1, a kind of apparatus for protecting power supply provides the inverse-excitation type switch power-supply of electrical power to load,
It comprises: switch element, its with direct current as power supply, carry out HF switch action;
Control part, it controls the HF switch action of described switch element;
Switch transformer, its electrical power that will obtain by the HF switch action of described switch element obtains supplying with electrical power as the input to the primary side winding at the primary side winding;
Feedback section, its output with the primary side output winding of described switch transformer is fed back to described control part, makes this primary side output stable,
It is characterized in that,
The primary side winding of described switch transformer comprises that output provides at least 1 output winding of the low pressure that electrical power uses, the excessive voltage that instead swashs auxiliary winding, is used to detect excessive voltage that power supply that described control part uses is provided to detect winding to described load, it is the winding that twines according to the mode normal shock with the input arranged side by side of described anti-sharp auxiliary winding that this excessive voltage detects winding
Possess the excessive voltage test section, it detects output voltage and the described anti-composite value that swashs the output voltage of auxiliary winding that described excessive voltage detects winding, and judges whether this composite value is certain above level,
Described control part, instead swash the output voltage of auxiliary winding as power supply with described, described switch element is carried out HF switch control, when composite value that described excessive voltage test section is judged described output voltage during for the level more than certain, latch its state, make the action of described control part continue to stop.
2, apparatus for protecting power supply according to claim 1 is characterized in that,
Described excessive voltage test section is arranged in the described control part.
3, apparatus for protecting power supply according to claim 1 is characterized in that,
Described excessive voltage test section and described control part are independent, be arranged on the primary side of described switch transformer, outlet side at described excessive voltage test section is connected with microcomputer, when this microcomputer detects unusual that excessive voltage applies, stop the action of described control part, become holding state.
4, apparatus for protecting power supply according to claim 3 is characterized in that,
Outlet side at described microcomputer is connected with display part, this display part show by the detected excessive voltage of described microcomputer apply unusual.
5, apparatus for protecting power supply according to claim 3 is characterized in that, comprising:
Be connected with input part with certain dc resistance, and the bypass section with handoff functionality that is connected side by side with described input part;
This bypass section is controlled by described microcomputer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004223170A JP3897035B2 (en) | 2004-07-30 | 2004-07-30 | Power protection device |
| JP2004223170 | 2004-07-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728491A true CN1728491A (en) | 2006-02-01 |
| CN100524996C CN100524996C (en) | 2009-08-05 |
Family
ID=35906937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100876420A Expired - Fee Related CN100524996C (en) | 2004-07-30 | 2005-07-27 | Power source protector |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3897035B2 (en) |
| KR (1) | KR100724829B1 (en) |
| CN (1) | CN100524996C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909315B (en) * | 2005-08-02 | 2011-06-15 | 艾默生网络能源系统北美公司 | Multiple-output electric power and its overcurrent detecting and protecting method |
| CN102496906A (en) * | 2011-12-28 | 2012-06-13 | 福建捷联电子有限公司 | Method of overvoltage protection of PFC output filter capacitor of display device and overvoltage protection circuit thereof |
| CN102882380A (en) * | 2012-10-22 | 2013-01-16 | 广州三晶电气有限公司 | Multi-path output flyback power supply with output short-circuit protection function and protection method |
| CN103219891A (en) * | 2007-04-06 | 2013-07-24 | 电力集成公司 | Method and apparatus for sensing input and output voltages from a single terminal of a d.c. converter controller |
| CN103607110A (en) * | 2013-11-01 | 2014-02-26 | 东南大学 | Rapid opening switch power supply assisting winding to carry out power supply |
| US20140247628A1 (en) * | 2007-04-06 | 2014-09-04 | Power Integrations, Inc. | Method and apparatus for power converter fault condition detection |
| CN109412421A (en) * | 2018-11-13 | 2019-03-01 | 广州金升阳科技有限公司 | A kind of parallel operation circuit |
| CN110417270A (en) * | 2019-07-19 | 2019-11-05 | 广州金升阳科技有限公司 | A kind of simplex winding Forward- flyback auxiliary power supply circuit |
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|---|---|---|---|---|
| KR100951823B1 (en) * | 2007-01-19 | 2010-04-12 | 삼성전자주식회사 | Apparatus and method for dc converting in wireless communication system |
| KR100905835B1 (en) * | 2007-04-11 | 2009-07-02 | 삼성전기주식회사 | Pdp power supply |
| KR100959661B1 (en) * | 2008-04-14 | 2010-05-26 | 숭실대학교산학협력단 | Superconducting fault current limiter using magnetic coupling for protection coordination with protective device of power system |
| TWI563785B (en) * | 2014-06-19 | 2016-12-21 | Richtek Technology Corp | Flyback power supply circuit with programmable function and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002335469A (en) * | 2001-05-10 | 2002-11-22 | Funai Electric Co Ltd | Television receiver |
| JP2003259636A (en) * | 2002-02-27 | 2003-09-12 | Matsushita Electric Ind Co Ltd | Switching power supply unit |
| JP2003348836A (en) * | 2002-05-28 | 2003-12-05 | Funai Electric Co Ltd | Protector for switching power source |
| CN2586279Y (en) * | 2002-12-02 | 2003-11-12 | 深圳迈瑞生物医疗电子股份有限公司 | Overpower protective circuit of switch mode power |
-
2004
- 2004-07-30 JP JP2004223170A patent/JP3897035B2/en not_active Expired - Fee Related
-
2005
- 2005-07-19 KR KR1020050065103A patent/KR100724829B1/en not_active IP Right Cessation
- 2005-07-27 CN CNB2005100876420A patent/CN100524996C/en not_active Expired - Fee Related
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| CN1909315B (en) * | 2005-08-02 | 2011-06-15 | 艾默生网络能源系统北美公司 | Multiple-output electric power and its overcurrent detecting and protecting method |
| US9912242B2 (en) | 2007-04-06 | 2018-03-06 | Power Integrations, Inc. | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller |
| US9543840B2 (en) | 2007-04-06 | 2017-01-10 | Power Integrations, Inc. | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller |
| CN103219891A (en) * | 2007-04-06 | 2013-07-24 | 电力集成公司 | Method and apparatus for sensing input and output voltages from a single terminal of a d.c. converter controller |
| US10432095B2 (en) | 2007-04-06 | 2019-10-01 | Power Integrations, Inc. | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller |
| US10177666B2 (en) | 2007-04-06 | 2019-01-08 | Power Integrations, Inc. | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller |
| US20140247628A1 (en) * | 2007-04-06 | 2014-09-04 | Power Integrations, Inc. | Method and apparatus for power converter fault condition detection |
| US9166479B2 (en) | 2007-04-06 | 2015-10-20 | Power Integrations, Inc. | Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller |
| US9071153B2 (en) * | 2007-04-06 | 2015-06-30 | Power Integrations, Inc. | Method and apparatus for power converter fault condition detection |
| CN103219891B (en) * | 2007-04-06 | 2016-03-09 | 电力集成公司 | From the method and apparatus of the single terminal sensing multivoltage value of power converter controller |
| CN102496906A (en) * | 2011-12-28 | 2012-06-13 | 福建捷联电子有限公司 | Method of overvoltage protection of PFC output filter capacitor of display device and overvoltage protection circuit thereof |
| CN102882380B (en) * | 2012-10-22 | 2014-06-18 | 广州三晶电气有限公司 | Multi-path output flyback power supply with output short-circuit protection function and protection method |
| CN102882380A (en) * | 2012-10-22 | 2013-01-16 | 广州三晶电气有限公司 | Multi-path output flyback power supply with output short-circuit protection function and protection method |
| CN103607110B (en) * | 2013-11-01 | 2016-01-13 | 东南大学 | A kind of quick opening switch power supply of auxiliary winding power |
| CN103607110A (en) * | 2013-11-01 | 2014-02-26 | 东南大学 | Rapid opening switch power supply assisting winding to carry out power supply |
| CN109412421A (en) * | 2018-11-13 | 2019-03-01 | 广州金升阳科技有限公司 | A kind of parallel operation circuit |
| CN110417270A (en) * | 2019-07-19 | 2019-11-05 | 广州金升阳科技有限公司 | A kind of simplex winding Forward- flyback auxiliary power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100524996C (en) | 2009-08-05 |
| JP3897035B2 (en) | 2007-03-22 |
| JP2006042573A (en) | 2006-02-09 |
| KR20060053876A (en) | 2006-05-22 |
| KR100724829B1 (en) | 2007-06-04 |
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