CN102857105A - Switch power source circuit and corresponding switch power source device - Google Patents
Switch power source circuit and corresponding switch power source device Download PDFInfo
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- CN102857105A CN102857105A CN2011101813161A CN201110181316A CN102857105A CN 102857105 A CN102857105 A CN 102857105A CN 2011101813161 A CN2011101813161 A CN 2011101813161A CN 201110181316 A CN201110181316 A CN 201110181316A CN 102857105 A CN102857105 A CN 102857105A
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Abstract
The invention relates to a switch power source circuit comprising an input module, a control module and an output module. The control module comprises a microprocessor and a protection circuit, wherein the microprocessor is used for controlling the input module via a switch tube Q1, and the protection circuit is used for transmitting protection signals to the microprocessor, comprises an overvoltage protection circuit, an undervoltage protection circuit and an overheating protection circuit and is connected with the microprocessor. The switch tube is connected with the input module and the outer module, and a control end of the switch tube is connected with the microprocessor. The invention further relates to a switch power source device. The upper limit and the lower limit input to a power source is limited by the switch power source, the switch power source is provided with the overheating protection circuit, reliability and safety of the switch power source device can be improved, and the defect that the service lives of an existing switch power source circuit and a corresponding switch power source device thereof are too short due to overvoltage, undervoltage and overheating of a line incoming power source is overcome.
Description
Technical field
The present invention relates to circuit design field, more particularly, relate to a kind of switching power circuit and corresponding switching power unit with general protective circuit.
Background technology
The quality index of Switching Power Supply at first should be as the first principle take safety and reliability.Satisfy in the electrical technology index under the condition of normal instructions for use, we know incoming power overvoltage and the under-voltage harm that Switching Power Supply is caused, the main manifestations scope that to be device exceed normal use because of the voltage that bears and current stress is damaged, and can not meet the demands because electricity function index is destroyed simultaneously.
Secondly, temperature is the most important factor that affects the power-supply device reliability.The analysis showed that according to interrelated data; when 2 ℃ of the every risings of electronic devices and components temperature, reliability decrease 10%, the working life during 50 ℃ of temperature rises only have 25 ℃ of temperature rises 1/6; cause damage for fear of power device is overheated, in Switching Power Supply, also need to arrange overheating protection circuit.
Therefore, be necessary to provide a kind of switching power circuit and corresponding switching power unit, to solve the existing problem of prior art.
Summary of the invention
The technical problem to be solved in the present invention is;, provide a kind of bound to input power to limit to some extent and have the reliability of improved Switching Power Supply of overheating protection circuit and switching power circuit and the corresponding switching power unit of fail safe because the incoming power overvoltage, incoming power is under-voltage and the overheated excessively low defective of Switching Power Supply life-span that causes for existing switching power circuit and corresponding switching power unit.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of switching power circuit, comprise: for the input module that obtains input voltage, for the control module of controlling described input module output and for the output module of the Voltage-output that described input module is exported to load, described control module comprises: be used for controlling by described switching tube Q1 the microprocessor of described input module output, and the protective circuit that is used for sending guard signal to described microprocessor; Described protective circuit is connected with the guard signal input of described microprocessor, the conducting two ends for the treatment of of described switching tube Q1 are connected in the input side current supply circuit of described output module, the control end of described switching tube Q1 is connected with described microprocessor, described microprocessor produces the control signal of the described switching tube Q1 break-make of control by receiving guard signal;
Described protective circuit comprises: overvoltage comparator AR2; under-voltage comparator AR1; overheated comparator AR3; input voltage sample circuit and thermistor R9; the input of described input voltage sample circuit connects the output of input module; the two-way output of described input voltage sample circuit connects respectively the input of described overvoltage comparator AR2 and under-voltage comparator AR1; described overvoltage comparator AR2; another input of under-voltage comparator AR1 be connected the input of comparator AR3 and be connected with the output of described reference voltage; another input of described overheated comparator AR3 is connected with the input of the dividing potential drop of thermistor R9; described under-voltage comparator AR1; the output of described overvoltage comparator AR2 and described overheated comparator AR3 is connected with the same port of described microprocessor simultaneously; as described under-voltage comparator AR1; the input voltage of arbitrary comparator changes when making its comparator output voltage generation redirect among described overvoltage comparator AR2 and the described overheated comparator AR3, and described protective circuit sends guard signal for described microprocessor.
In the described switching power circuit, wherein, the inverting input of described overvoltage comparator AR2 is connected with the output of reference voltage, and the in-phase input end of described overvoltage comparator AR2 links to each other with one tunnel output of described input voltage sample circuit; The in-phase input end of described under-voltage comparator AR1 is connected with the output of reference voltage, and the inverting input of described under-voltage comparator AR1 links to each other with another road output of described input voltage sample circuit; The in-phase input end of described overheated comparator AR3 is connected with the output of reference voltage, and the inverting input of described overheated comparator AR3 is connected with the dividing potential drop input of thermistor R9.
In the described switching power circuit, wherein, described input voltage sample circuit comprises rheostat R5, resistance R 7 and resistance R 8, connect successively between the output of described input module and the ground rheostat R5, resistance R 7 and resistance R 8, dividing potential drop output on the resistance R 8 connects the input of described overvoltage comparator AR2 as one tunnel output of described input voltage sample circuit, resistance R 7 is exported an input that connects described under-voltage comparator AR1 with the dividing potential drop output on resistance R is connected as another road of described input voltage sample circuit.
In the described switching power circuit, wherein, described thermistor R9 is the thermistor of being close to switching tube Q1 surface.
In the described switching power circuit; wherein; described protective circuit also comprises emergent comparator AR4; the inverting input of described emergent comparator AR4 is connected with the output of reference voltage; the in-phase input end access one emergent control signal of described emergent comparator AR4, the output of described emergent comparator AR4 is connected with the emergency signal sampling end of described microprocessor.
In the described switching power circuit, wherein, described reference voltage is made of resistance R 1, voltage-stabiliser tube D1 and DC power supply VCC, series resistance R1 and voltage-stabiliser tube D1 between the output of DC power supply VCC and the ground, the negative pole of voltage-stabiliser tube D1 is as the output of described reference voltage, the plus earth of voltage-stabiliser tube D1.
In the described switching power circuit, wherein, described input module comprises rectification circuit and filter circuit, described rectification circuit is full-wave bridge rectifier circuit, described filter circuit comprises capacitor C 1, and an end of described capacitor C 1 connects the output of described rectification circuit, the other end ground connection of described capacitor C 1.
In the described switching power circuit, wherein, described output module comprises a transformer, diode D21 and filter capacitor C4, the primary side of described transformer connects the output of described input module, and the conducting two ends for the treatment of of described switching tube Q1 are connected in the primary coil current supply circuit of described transformer, one end ground connection of described transformer secondary output coil, the other end of described transformer secondary output coil is ground connection behind the negative pole of the positive pole by diode D21, diode D21 and the filter capacitor C4 successively.
In the described switching power circuit, wherein, described output module also comprises: the cascaded structure of parallel filtering capacitor C 2 and diode D1 between the two ends of described transformer, one end of described transformer connects the output of described input module and the end of filter capacitor C2, the one end other end of described transformer connects the end of described switching tube Q1 and the positive pole of diode D1, and between the negative pole of an end of described transformer and diode D1 serial connection current-limiting resistance R3.
The invention still further relates to a kind of switching power unit, switching power unit of the present invention adopts above-mentioned switching power circuit to carry out energy supply.
Implement switching power circuit of the present invention and corresponding switching power unit; has following beneficial effect: the bound of input power is limited to some extent and has an overheating protection circuit; reliability and the fail safe of Switching Power Supply be can improve, existing switching power circuit and corresponding Switching Power Supply avoided because the incoming power overvoltage, incoming power is under-voltage and the overheated excessively low defective of Switching Power Supply life-span that causes.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the electrical block diagram of the preferred embodiment of switching power circuit of the present invention;
Fig. 2 is the electrical block diagram of protective circuit of the preferred embodiment of switching power circuit of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In the electrical block diagram of the preferred embodiment of switching power circuit of the present invention shown in Figure 1; described switching power circuit comprises: the input module 1 that is used for obtaining input voltage; the Voltage-output that is used for controlling the control module 2 of described input module output and is used for described input module is exported is to the output module 3 of load; wherein control module 2 comprises microprocessor 21 and protective circuit 22; microprocessor 21 is used for controlling by described switching tube Q1 the output of described input module 1; protective circuit 22 is used for sending guard signal to described microprocessor 21; guard signal input (the P1.2 of described protective circuit 22 and described microprocessor 21; P1.3) connect; the conducting two ends for the treatment of of described switching tube Q1 are connected in the input side current supply circuit of described output module 3; the control end of described switching tube Q1 is connected with the pin P1.1 of described microprocessor 21; described microprocessor 21 produces the control signal of the described switching tube Q1 break-make of control by receiving guard signal.In the foregoing circuit, as shown in Figure 1, if switching tube Q1 adopts the positive-negative-positive triode, then the conducting two ends for the treatment of of described switching tube Q1 are respectively collector electrode and emission collection, its control end is base stage, certainly the invention is not restricted to adopt this type of triode, can also adopt metal-oxide-semiconductor etc. to have the semiconductor device of gate-controlled switch effect.
As shown in Figure 2; switching power circuit of the present invention is provided with has overvoltage comparator AR2; under-voltage comparator AR1 and overheated comparator AR3; the protective circuit 22 of input voltage sample circuit and thermistor R9; the input of described input voltage sample circuit connects the output (node P1.4 as shown in Figure 1) of input module 1; the two-way output of described input voltage sample circuit connects respectively the input of described overvoltage comparator AR2 and under-voltage comparator AR1; described overvoltage comparator AR2; another input of under-voltage comparator AR1 be connected the input of comparator AR3 and be connected with the output of described reference voltage; another input of described overheated comparator AR3 is connected with the input of the dividing potential drop of thermistor R9; described under-voltage comparator AR1; the output of described overvoltage comparator AR2 and described overheated comparator AR3 is connected with the same port P1.2 (being the guard signal input of described microprocessor 21) of described microprocessor 21 simultaneously; as described under-voltage comparator AR1; the input voltage of arbitrary comparator changes when making its comparator output voltage generation redirect among described overvoltage comparator AR2 and the described overheated comparator AR3, and described protective circuit 22 sends guard signal for described microprocessor 21.
Fig. 2 has provided an optimum embodiment protective circuit that is applied in the switching power circuit of the present invention, describes below in conjunction with optimum embodiment.
On the basis of foregoing circuit structure, the inverting input of described overvoltage comparator AR2 is connected with the output of reference voltage, and the in-phase input end of described overvoltage comparator AR2 links to each other with one tunnel output of described input voltage sample circuit; The in-phase input end of described under-voltage comparator AR1 is connected with the output of reference voltage, and the inverting input of described under-voltage comparator AR1 links to each other with another road output of described input voltage sample circuit; The in-phase input end of described overheated comparator AR3 is connected with the output of reference voltage, and the inverting input of described overheated comparator AR3 is connected with the dividing potential drop input of thermistor R9; Described overvoltage comparator AR2, under-voltage comparator AR1 be connected the output of comparator AR3 and connect simultaneously the same port P1.2 (being the guard signal input of described microprocessor 21) of described microprocessor 21.
On the basis of foregoing circuit structure, described input voltage sample circuit comprises rheostat R5, resistance R 7 and resistance R 8, connect successively between the output of described input module 1 (node P1.4 as shown in Figure 1) and the ground rheostat R5, resistance R 7 and resistance R 8, dividing potential drop output on the resistance R 8 connects the input of described overvoltage comparator AR2 as one tunnel output of described input voltage sample circuit, resistance R 7 is exported an input that connects described under-voltage comparator AR1 with the dividing potential drop output on resistance R is connected as another road of described input voltage sample circuit.
On the basis of foregoing circuit structure, described reference voltage is made of resistance R 1, voltage-stabiliser tube D1 and DC power supply VCC, series resistance R1 and voltage-stabiliser tube D1 between the output of DC power supply VCC and the ground, the negative pole of voltage-stabiliser tube D1 be as the output of described reference voltage, the plus earth of voltage-stabiliser tube D1.In this structure, guarantee the stability of reference voltage by arranging of voltage stabilizing didoe D1, thereby guaranteed stability and the reliability of protective circuit 22 work.
In the above circuit structure; when output (the node P1.4 as shown in Figure 1) overtension of input module 1; the in-phase input end input high level that causes overvoltage comparator AR2; so that the output output low level of overvoltage comparator AR2 is to the P1.2 pin of microprocessor 21; at this moment can control the P1.1 pin of microprocessor 21 stops power supply; thereby switching tube Q1 cut-off; switching power circuit quits work; namely realized the protection to device in the switching power circuit; can certainly only send over voltage alarm, allow the staff judge next step operation (can directly start emergency button closing switch power circuit etc.).Can control the voltage threshold that overvoltage comparator AR2 sends the overvoltage signal by the size of regulating adjustable resistance R5, the resistance of adjustable resistance R5 is larger, and the voltage threshold that overvoltage comparator AR2 sends the overvoltage signal is just higher.
In the above circuit structure; when output (the node P1.4 as shown in Figure 1) brownout of input module 1; the inverting input input low level that causes under-voltage comparator AR1; so that the output output low level of under-voltage comparator AR1 is to the P1.2 pin of microprocessor 21; at this moment can control the P1.1 pin of microprocessor 21 stops power supply; thereby switching tube Q1 cut-off; switching power circuit quits work; namely realized the protection to device in the switching power circuit; can certainly only send undervoltage warning, allow the staff judge next step operation (can directly start emergency button closing switch power circuit etc.).Can control the voltage threshold that under-voltage comparator AR1 sends under-voltage signal by the size of regulating adjustable resistance R5, the resistance of adjustable resistance R5 is larger, and the voltage threshold that under-voltage comparator AR1 sends under-voltage signal is just higher.
In the above circuit structure, above-mentioned thermistor R9 is the thermistor of being close to switching tube Q1 surface.If thermistor R9 adopts negative temperature coefficient type; then when temperature rises; the resistance of thermistor R9 descends; the input low level that causes the inverting input of overheated comparator AR3; the output output low level of overheated comparator AR3 is to the P1.2 pin of microprocessor 21; at this moment can control the P1.1 pin of microprocessor 21 stops power supply; thereby switching tube Q1 cut-off; switching power circuit quits work; namely realized the overtemperature protection to device in the switching power circuit; can certainly only send temperature alarm, allow the staff judge next step operation (can directly start emergency button closing switch power circuit etc.).Size by suitable selection current-limiting resistance R3 can be controlled the voltage threshold that overheated comparator AR3 sends heat alarm; the resistance of current-limiting resistance R3 is larger; the temperature threshold that overheated comparator AR3 sends heat alarm is just lower, can certainly adopt different connected modes to use the thermistor of positive temperature coefficient to realize protective circuit of the present invention.
On the basis of above-mentioned circuit structure shown in Figure 2; described protective circuit 22 also comprises emergent comparator AR4; the inverting input of described emergent comparator AR4 is connected with the output of reference voltage; the in-phase input end access one emergent control signal of described emergent comparator AR4, the output of described emergent comparator AR4 is connected with the emergency signal sampling end of described microprocessor 21.The emergent control signal here realizes by an external emergency button, when starting emergency button, the in-phase input end input low level of emergent comparator AR4, so that the output output low level of emergent comparator AR4 is to the P1.3 pin of microprocessor 21, the P1.1 pin of control microprocessor 21 is stopped power supply, thereby switching tube Q1 cut-off, switching power circuit quits work, thereby has realized the emergent control that stops of switching power circuit.
On the basis of foregoing circuit structure, as shown in Figure 1, described input module 1 comprises rectification circuit and filter circuit, described rectification circuit is full-wave bridge rectifier circuit, described filter circuit comprises capacitor C 1, one end of described capacitor C 1 connects the output of described rectification circuit, the other end ground connection of described capacitor C 1.
On the basis of foregoing circuit structure, as shown in Figure 1, described output module 3 comprises a transformer, diode D21 and filter capacitor C4, the primary side of described transformer connects the output of described input module 1, and the conducting two ends for the treatment of of described switching tube Q1 are connected in the primary coil current supply circuit of described transformer, one end ground connection of described transformer secondary output coil, the other end of described transformer secondary output coil is ground connection behind the negative pole of the positive pole by diode D21, diode D21 and the filter capacitor C4 successively.
On the basis of foregoing circuit structure, as shown in Figure 1, described output module 3 also comprises: the cascaded structure of parallel filtering capacitor C 2 and diode D1 between the two ends of described transformer, one end of described transformer connects the output (node P1.4 as shown in Figure 1) of described input module 1 and the end of filter capacitor C2, the one end other end of described transformer connects the end of described switching tube Q1 and the positive pole of diode D1, and between the negative pole of an end of described transformer and diode D1 serial connection current-limiting resistance R3.The input of input module 1 is carried out rectifying and wave-filtering so that the voltage waveform of input is more smoothly stable, and convenience is further processed it, can obtain the stabilized voltage power supply of user's needs by the processing of transformation filter unit.After outage, current-limiting resistance R3 and diode D1 form the loop that discharges can for the energy storage of primary inductance.
It is the principles illustrated of carrying out for the concrete annexation of Fig. 2 in the foregoing circuit structure, but the invention is not restricted to the concrete connection connected mode of comparator among Fig. 2, by the resistance of a resistance and the performance of comparator in the selection input voltage sample circuit, adjust homophase and the anti-phase input of comparator and can realize the function shown in the invention described above equally.
Specify the operation principle of switching power circuit of the present invention below by the electrical block diagram of Fig. 1 and Fig. 2.
Switching power circuit of the present invention is the overheated protective circuit of the Switching Power Supply overvoltage that is provided with the pilot switch power supply, under-voltage and critical power ratio element, to guarantee the normal and reliably operation of Switching Power Supply.Overvoltage, under-voltage, overheating protection circuit that switching power circuit of the present invention consists of with 4 comparators and several discrete component.When above-mentioned any one situation occurs, Switching Power Supply is quit work, improved reliability and the fail safe of Switching Power Supply.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure transformation that utilizes specification of the present invention and accompanying drawing content to do, or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. switching power circuit, comprise: for the input module (1) that obtains input voltage, for the control module (2) of controlling described input module output and for the output module (3) of the Voltage-output that described input module is exported to load, it is characterized in that, described control module (2) comprising:
Be used for controlling by described switching tube Q1 the microprocessor (21) of described input module (1) output, and the protective circuit (22) that is used for sending guard signal to described microprocessor (21); Described protective circuit (22) is connected with the guard signal input of described microprocessor (21), the conducting two ends for the treatment of of described switching tube Q1 are connected in the input side current supply circuit of described output module (3), the control end of described switching tube Q1 is connected with described microprocessor (21), described microprocessor (21) produces the control signal of the described switching tube Q1 break-make of control by receiving guard signal;
Described protective circuit (22) comprising: overvoltage comparator AR2; under-voltage comparator AR1; overheated comparator AR3; input voltage sample circuit and thermistor R9; the input of described input voltage sample circuit connects the output of input module (1); the two-way output of described input voltage sample circuit connects respectively the input of described overvoltage comparator AR2 and under-voltage comparator AR1; described overvoltage comparator AR2; another input of under-voltage comparator AR1 be connected the input of comparator AR3 and be connected with the output of described reference voltage; another input of described overheated comparator AR3 is connected with the input of the dividing potential drop of thermistor R9; described under-voltage comparator AR1; the output of described overvoltage comparator AR2 and described overheated comparator AR3 is connected with the same port of described microprocessor (21) simultaneously; as described under-voltage comparator AR1; the input voltage of arbitrary comparator changes when making its comparator output voltage generation redirect among described overvoltage comparator AR2 and the described overheated comparator AR3, and described protective circuit (22) sends guard signal for described microprocessor (21).
2. switching power circuit according to claim 1 is characterized in that,
The inverting input of described overvoltage comparator AR2 is connected with the output of reference voltage, and the in-phase input end of described overvoltage comparator AR2 links to each other with one tunnel output of described input voltage sample circuit;
The in-phase input end of described under-voltage comparator AR1 is connected with the output of reference voltage, and the inverting input of described under-voltage comparator AR1 links to each other with another road output of described input voltage sample circuit;
The in-phase input end of described overheated comparator AR3 is connected with the output of reference voltage, and the inverting input of described overheated comparator AR3 is connected with the dividing potential drop input of thermistor R9.
3. switching power circuit according to claim 1, it is characterized in that, described input voltage sample circuit comprises rheostat R5, resistance R 7 and resistance R 8, connect successively between the output of described input module (1) and the ground rheostat R5, resistance R 7 and resistance R 8, dividing potential drop output on the resistance R 8 connects the input of described overvoltage comparator AR2 as one tunnel output of described input voltage sample circuit, resistance R 7 is exported an input that connects described under-voltage comparator AR1 with the dividing potential drop output on resistance R is connected as another road of described input voltage sample circuit.
4. switching power circuit according to claim 1 is characterized in that, described thermistor R9 is the thermistor of being close to switching tube Q1 surface.
5. switching power circuit according to claim 1; it is characterized in that; described protective circuit (22) also comprises emergent comparator AR4; the inverting input of described emergent comparator AR4 is connected with the output of reference voltage; the in-phase input end access one emergent control signal of described emergent comparator AR4, the output of described emergent comparator AR4 is connected with the emergency signal sampling end of described microprocessor (21).
6. switching power circuit according to claim 1, it is characterized in that, described reference voltage is made of resistance R 1, voltage-stabiliser tube D1 and DC power supply VCC, series resistance R1 and voltage-stabiliser tube D1 between the output of DC power supply VCC and the ground, the negative pole of voltage-stabiliser tube D1 is as the output of described reference voltage, the plus earth of voltage-stabiliser tube D1.
7. switching power circuit according to claim 1, it is characterized in that, described input module (1) comprises rectification circuit and filter circuit, described rectification circuit is full-wave bridge rectifier circuit, described filter circuit comprises capacitor C 1, one end of described capacitor C 1 connects the output of described rectification circuit, the other end ground connection of described capacitor C 1.
8. switching power circuit according to claim 1, it is characterized in that, described output module (3) comprises a transformer, diode D21 and filter capacitor C4, the primary side of described transformer connects the output of described input module (1), and the conducting two ends for the treatment of of described switching tube Q1 are connected in the primary coil current supply circuit of described transformer, one end ground connection of described transformer secondary output coil, the other end of described transformer secondary output coil is ground connection behind the negative pole of the positive pole by diode D21, diode D21 and the filter capacitor C4 successively.
9. switching power circuit according to claim 1, it is characterized in that, described output module (3) also comprises: the cascaded structure of parallel filtering capacitor C 2 and diode D1 between the two ends of described transformer, one end of described transformer connects the output of described input module (1) and the end of filter capacitor C2, the one end other end of described transformer connects the end of described switching tube Q1 and the positive pole of diode D1, and between the negative pole of an end of described transformer and diode D1 serial connection current-limiting resistance R3.
10. switching power unit that adopts switching power circuit arbitrary among the claim 1-9 to carry out energy supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101813161A CN102857105A (en) | 2011-06-30 | 2011-06-30 | Switch power source circuit and corresponding switch power source device |
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| CN2011101813161A CN102857105A (en) | 2011-06-30 | 2011-06-30 | Switch power source circuit and corresponding switch power source device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103166199A (en) * | 2013-04-09 | 2013-06-19 | 许继集团有限公司 | Switching power supply and voltage protection method thereof |
| CN104113223A (en) * | 2014-07-29 | 2014-10-22 | 深圳市华星光电技术有限公司 | Alternating current (AC)-direct current (DC) converting circuit |
| CN106253651A (en) * | 2016-09-30 | 2016-12-21 | 国网江苏省电力公司南京供电公司 | A kind of numerically controlled modularized microcomputer source over under-voltage protection circuit |
| CN107171533A (en) * | 2016-03-07 | 2017-09-15 | 精工半导体有限公司 | Switching regulaor |
| CN108879603A (en) * | 2018-07-23 | 2018-11-23 | 南京通华芯微电子有限公司 | The implementation method of temperature detection in a kind of temperature protection circuit |
| CN109546847A (en) * | 2019-01-16 | 2019-03-29 | 合肥惠科金扬科技有限公司 | Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply |
| CN113381501A (en) * | 2021-06-23 | 2021-09-10 | 广东优力普物联科技有限公司 | Device for automatically identifying insertion of PD equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166199A (en) * | 2013-04-09 | 2013-06-19 | 许继集团有限公司 | Switching power supply and voltage protection method thereof |
| CN103166199B (en) * | 2013-04-09 | 2016-04-20 | 许继集团有限公司 | A kind of Switching Power Supply and voltage protection method thereof |
| CN104113223A (en) * | 2014-07-29 | 2014-10-22 | 深圳市华星光电技术有限公司 | Alternating current (AC)-direct current (DC) converting circuit |
| CN104113223B (en) * | 2014-07-29 | 2016-07-06 | 深圳市华星光电技术有限公司 | AC-DC change-over circuit |
| US9627993B2 (en) | 2014-07-29 | 2017-04-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | AC-DC conversion circuit |
| CN107171533A (en) * | 2016-03-07 | 2017-09-15 | 精工半导体有限公司 | Switching regulaor |
| CN107171533B (en) * | 2016-03-07 | 2020-03-27 | 艾普凌科有限公司 | Switching regulator |
| CN106253651A (en) * | 2016-09-30 | 2016-12-21 | 国网江苏省电力公司南京供电公司 | A kind of numerically controlled modularized microcomputer source over under-voltage protection circuit |
| CN108879603A (en) * | 2018-07-23 | 2018-11-23 | 南京通华芯微电子有限公司 | The implementation method of temperature detection in a kind of temperature protection circuit |
| CN109546847A (en) * | 2019-01-16 | 2019-03-29 | 合肥惠科金扬科技有限公司 | Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply |
| CN113381501A (en) * | 2021-06-23 | 2021-09-10 | 广东优力普物联科技有限公司 | Device for automatically identifying insertion of PD equipment |
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Application publication date: 20130102 |