CN204794691U - Switching power supply and electronic equipment - Google Patents
Switching power supply and electronic equipment Download PDFInfo
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- CN204794691U CN204794691U CN201520440075.1U CN201520440075U CN204794691U CN 204794691 U CN204794691 U CN 204794691U CN 201520440075 U CN201520440075 U CN 201520440075U CN 204794691 U CN204794691 U CN 204794691U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a switching power supply and electronic equipment, wherein, this electronic equipment includes this switching power supply, this switching power supply includes power input end, a power module, the 2nd power module, power output end, is used for detecting a power module's output voltage's a detection module, and be used for detecting the 2nd power module's output voltage's the 2nd detection module, a detection module or the 2nd detection module feedback detected signal is given a power module with the 2nd power module is in order to adjust simultaneously a power module with the 2nd power module's output voltage makes it equal. The utility model discloses the parallel operation of two the same powers can be realized, the big power output's of switching power supply purpose is reached.
Description
Technical field
The utility model relates to a kind of Switching Power Supply and has the electronic equipment of this Switching Power Supply.
Background technology
Switching Power Supply is widely used in industrial automation control appliance, military industry equipment, research equipment, lighting apparatus, industrial control equipment, communication apparatus, power equipment, instrument and meter, Medical Devices, air purifier, refrigerator, liquid crystal display, communication apparatus, the electronic equipments such as audio-visual products, security device, computer housing, digital product.
LED television also uses Switching Power Supply to power, and usually uses a Switching Power Supply just can complete the power supply of LED television, but for the large-scale tv machine of more than 50 cun, comparatively greatly, if only powered with a power supply, the difficulty of Power Management Design is large for its power dissipation ratio, if powered with two power sources in parallel, the power supply to large-scale tv machine can be realized, also Power Management Design difficulty is reduced, but general Switching Power Supply can not in parallel use, even if because the Switching Power Supply of same design, due to the difference of material, also error can be there is in its output voltage, can not be completely equal, if two power sources in parallel use in this case, the power supply that so output voltage is high will bear all output, the power supply that output voltage is low will not work, do not reach two power sources in parallel work, respectively share the object of a half-power, thus, the direct parallel connection of two same power supplies uses and can not realize high-power output.
Utility model content
Main purpose of the present utility model is to provide a kind of Switching Power Supply, is intended to the parallel operation realizing two same power supplies, reaches the object of the high-power output of Switching Power Supply.
In order to achieve the above object, the Switching Power Supply that the utility model provides comprise power input, the first power module, second source module, power output end, for detecting the first detection module of the output voltage of described first power module, and for the second detection module of the output voltage that detects described second source module; Described first detection module or described second detection module feedback detection signal give described first power module and described second source module, make it equal to regulate the output voltage of described first power module and described second source module simultaneously;
The input of described first power module is all connected with described power input with the input of described second source module, the output of described first power module is connected with the input of described power output end and described first detection module respectively, and the output of described second source module is connected with the input of described power output end and described second detection module respectively; The output of described first detection module, the output of described second detection module are all connected with the feedback test side of described first power module and the feedback test side of described second source module.
Preferably, described first power module comprises the first controller, the first switching tube, the first transformer, the first diode, the second diode, the first electric capacity and the second electric capacity;
The Voltage Feedback pin of described first controller is connected with the anode of described first diode, and via described first capacity earth, the control signal output pin of described first controller is connected with the grid of described first switching tube; The negative electrode of described first diode is connected with the output of described first detection module and the output of described second detection module respectively; Primary coil one end of described first transformer is connected with described power input, and the other end is connected with the drain electrode of described first switching tube, the source ground of described first switching tube; Secondary coil one end of described first transformer is connected with the anode of described second diode, other end ground connection; The negative electrode of described second diode is via described second capacity earth, and the negative electrode of described second diode is connected with the input of described power output end and described first detection module respectively with the points of common connection of described second electric capacity.
Preferably, described second source module comprises second controller, second switch pipe, the second transformer, the 3rd diode, the 4th diode, the 3rd electric capacity and the 4th electric capacity;
The Voltage Feedback pin of described second controller is connected with the anode of described 3rd diode, and via described 3rd capacity earth, the control signal output pin of described second controller is connected with the grid of described second switch pipe; The negative electrode of described 3rd diode is connected with the output of described first detection module and the output of described second detection module respectively; Primary coil one end of described second transformer is connected with described power input, and the other end is connected with the drain electrode of described second switch pipe, the source ground of described second switch pipe; Secondary coil one end of described second transformer is connected with the anode of described 4th diode, other end ground connection; The negative electrode of described 4th diode is via described 4th capacity earth, and the negative electrode of described second tetrode is connected with the input of described power output end and described second detection module respectively with the points of common connection of described 4th electric capacity.
Preferably, described first detection module comprises the first resistance, the second resistance, the first three terminal regulator, the first photoelectrical coupler and the 5th electric capacity; Described first photoelectrical coupler comprises the first luminous tube and the first phototriode;
One end of described first resistance is connected with the output of described first power module, the other end of described first resistance is via described second grounding through resistance, described first resistance is connected with the control pole of described first three terminal regulator with the points of common connection of described second resistance, and is connected with the negative electrode of described first luminous tube and the negative electrode of described first three terminal regulator respectively via described 5th electric capacity; The plus earth of described first three terminal regulator, the anode of described first luminous tube is connected with the output of described first power module; The collector electrode of described first phototriode is connected with the feedback test side of described first power module and the feedback test side of described second source module respectively.
Preferably, described first detection module also comprises the 3rd resistance; One end of described 3rd resistance is connected with the output of described first power module, and the other end of described 3rd resistance is connected with the anode of described first luminous tube.
Preferably, described second detection module comprises the 4th resistance, the 5th resistance, the second three terminal regulator, the second photoelectrical coupler and the 6th electric capacity; Described second photoelectrical coupler comprises the second luminous tube and the second phototriode;
One end of described 4th resistance is connected with the output of described second source module, the other end of described 4th resistance is via described 5th grounding through resistance, described 4th resistance is connected with the control pole of described second three terminal regulator with the points of common connection of described 5th resistance, and is connected with the negative electrode of described second luminous tube and the negative electrode of described second three terminal regulator respectively via described 6th electric capacity; The plus earth of described second three terminal regulator, the anode of described second luminous tube is connected with the output of described second source module; The collector electrode of described second phototriode is connected with the feedback test side of described first power module and the feedback test side of described second source module respectively.
Preferably, described second detection module also comprises the 6th resistance; One end of described 6th resistance is connected with the output of described second source module, and the other end of described 6th resistance is connected with the anode of described second luminous tube.
The utility model also provides a kind of electronic equipment, this electronic equipment comprises Switching Power Supply, this Switching Power Supply comprise power input, the first power module, second source module, power output end, for detecting the first detection module of the output voltage of described first power module, and for the second detection module of the output voltage that detects described second source module; Described first detection module or described second detection module feedback detection signal give described first power module and described second source module, make it equal to regulate the output voltage of described first power module and described second source module simultaneously;
The input of described first power module is all connected with described power input with the input of described second source module, the output of described first power module is connected with the input of described power output end and described first detection module respectively, and the output of described second source module is connected with the input of described power output end and described second detection module respectively; The output of described first detection module, the output of described second detection module are all connected with the feedback test side of described first power module and the feedback test side of described second source module.
Technical solutions of the utility model increase first detection module by the output at the first power module, to detect the output voltage of described first power module, increase by the second detection module at the output of second source module, to detect the output voltage of described second source module, and, first detection module or the second detection module feedback detection signal give the first power module and second source module, to regulate the output voltage of the first power module and second source module simultaneously, make the output voltage of the first power module and second source module equal, thus the first power module and the work of second source wired in parallel can be realized, namely the parallel operation of two same power supplies is realized, and then reach the object of the high-power output of Switching Power Supply.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model Switching Power Supply preferred embodiment;
Fig. 2 is the electrical block diagram of the embodiment of Switching Power Supply one shown in Fig. 1.
Drawing reference numeral illustrates:
The realization of the purpose of this utility model, functional characteristics and advantage, will in conjunction with the embodiments, and be described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of Switching Power Supply, can be applicable to the electronic equipments such as LED television.
With reference to the theory diagram that Fig. 1, Fig. 1 are the preferred embodiment of the utility model Switching Power Supply.
In the utility model preferred embodiment, as shown in Figure 1, Switching Power Supply of the present utility model comprises power input VI, the first power module 10, second source module 20, power output end VO, first detection module 30 and the second detection module 40.Wherein, first detection module 30 is for detecting the output voltage of described first power module 10, second detection module 40 is for detecting the output voltage of described second source module 20, described first detection module 30 or described second detection module 40 feed back detection signal to described first power module 10 and described second source module 20, make it equal to regulate the output voltage of described first power module 10 and described second source module 20 simultaneously.
As shown in Figure 1, the input of described first power module 10 is all connected with described power input VI with the input of described second source module 20, the output of described first power module 10 is connected with the input of described power output end VO and described first detection module 30 respectively, and the output of described second source module 20 is connected with the input of described power output end VO and described second detection module 40 respectively; The output of described first detection module 30, the output of described second detection module 40 are all connected with the feedback test side of described first power module 10 and the feedback test side of described second source module 20.
In the present embodiment, first power module 10 and second source module 20 are two power supplys of same design, i.e. two identical power supplys, when power input VI accesses direct current, first power module 10 and second source module 20 all have output voltage, and export to the electricity consumption load supplying of electronic equipment by power output end VO.In the Switching Power Supply course of work, first detection module 30 detects the output voltage of the first power module 10, namely samples the output voltage of the first power module 10, obtains the first sampling voltage; Second detection module 40 detects the output voltage of second source module 20, namely samples the output voltage of second source module 20, obtains the second sampling voltage.
Those skilled in the art should be understood that, although the first power module 10 and second source module 20 are two power supplys of same design, device parameters is identical, but due to the difference of device material, can there is error between the first power module 10 and the output voltage of second source module 20.Thus, the present embodiment is when the first sampling voltage reaches default reference voltage (as 2.5V), the feedback test side of first detection module 30 output detection signal to the first power module 10 and the feedback test side of second source module 20, now, first power module 10 regulates its output voltage, second source module 20 regulates its output voltage simultaneously, because the detection signal feeding back to the first power module 10 and second source module 20 is same detection signal, therefore, ensure that the output voltage of the first power module 10 and second source module 20 after regulating is equal.Or, when the second sampling voltage reaches said reference voltage, the feedback test side of the second detection module 40 output detection signal to the first power module 10 and the feedback test side of second source module 20, now, first power module 10 regulates its output voltage, second source module 20 regulates its output voltage simultaneously, in like manner, because the detection signal feeding back to the first power module 10 and second source module 20 is same detection signal, therefore, ensure that the output voltage of the first power module 10 and second source module 20 after regulating is equal.Because the output voltage of the first power module 10 and second source module 20 is equal, therefore the first power module 10 and second source module 20 can parallel operations, thus, from the superposition that the supply voltage of power output end VO output is the output voltage of the first power module 10 and second source module 20, achieve the high-power output of Switching Power Supply.
Relative to prior art, Switching Power Supply of the present utility model can guarantee that the output voltage of the first power module 10 and second source module 20 is equal, thus the first power module 10 and second source module 20 parallel operation can be realized, namely realize the parallel operation of two same power supplies, and then reach the object of the high-power output of Switching Power Supply.
Refer again to Fig. 2, Fig. 2 is the electrical block diagram of the embodiment of Switching Power Supply one shown in Fig. 1.
As shown in Figure 2, described first power module 10 comprises the first controller IC 1, first switching tube M1, the first transformer TR1, the first diode D1, the second diode D2, the first electric capacity C1 and the second electric capacity C2.Wherein, the first switching tube M1 is NMOS tube, and the first diode D1 is as isolating diode, make the first power module 10 and second source module 20 can be in parallel, first electric capacity C1 is as filter capacitor, and the second diode D2 is as output rectifier diode, and the second electric capacity C2 is as output capacitance.
The Voltage Feedback pin FB1 of described first controller IC 1 is connected with the anode of described first diode D1, and via described first electric capacity C1 ground connection, the control signal output pin PWM1 of described first controller IC 1 is connected with the grid of described first switching tube M1; The negative electrode of described first diode D1 is connected with the output of described first detection module 30 and the output of described second detection module 40 respectively; Primary coil one end of described first transformer TR1 is connected with described power input VI, and the primary coil other end of described first transformer TR1 is connected with the drain electrode of described first switching tube M1, the source ground of described first switching tube M1; Secondary coil one end of described first transformer TR1 is connected with the anode of described second diode D2, the secondary coil other end ground connection of described first transformer TR1; The negative electrode of described second diode D2 is via described second electric capacity C2 ground connection, and the negative electrode of described second diode D2 is connected with the input of described power output end VO and described first detection module 30 respectively with the points of common connection of described second electric capacity C2.
As shown in Figure 2, described second source module 20 comprises second controller IC2, second switch pipe M2, the second transformer TR2, the 3rd diode D3, the 4th diode D4, the 3rd electric capacity C3 and the 4th electric capacity C4.Wherein, second switch pipe M2 is NMOS tube, and the 3rd diode D3 is as isolating diode, make the first power module 10 and second source module 20 can be in parallel, 3rd electric capacity C3 is as filter capacitor, and the 4th diode D4 is as output rectifier diode, and the 4th electric capacity C4 is as output capacitance.
The Voltage Feedback pin FB2 of described second controller IC2 is connected with the anode of described 3rd diode D3, and via described 3rd electric capacity C3 ground connection, the control signal output pin PWM2 of described second controller IC2 is connected with the grid of described second switch pipe M2; The negative electrode of described 3rd diode D3 is connected with the output of described first detection module 30 and the output of described second detection module 40 respectively; Primary coil one end of described second transformer TR2 is connected with described power input VI, and the primary coil other end of described second transformer TR2 is connected with the drain electrode of described second switch pipe M2, the source ground of described second switch pipe M2; Secondary coil one end of described second transformer TR2 is connected with the anode of described 4th diode D4, the secondary coil other end ground connection of described second transformer TR2; The negative electrode of described 4th diode D4 is via described 4th electric capacity C4 ground connection, and the negative electrode of described second tetrode is connected with the input of described power output end VO and described second detection module 40 respectively with the points of common connection of described 4th electric capacity C4.
As shown in Figure 2, described first detection module 30 comprises the first resistance R1, the second resistance R2, the first three terminal regulator U1, the first photoelectrical coupler OP1 and the 5th electric capacity C5; Described first photoelectrical coupler OP1 comprises the first luminous tube D01 and the first phototriode Q01.Wherein, first resistance R1 and the second resistance R2 is as divider resistance, dividing potential drop sampling is carried out to the output voltage of the first power module 10,5th electric capacity C5 is used for avoiding when the first three terminal regulator U1 not conducting, the first luminous tube D01 of the first photoelectrical coupler OP1 is luminous and cause the first phototriode Q01 conducting of the first photoelectrical coupler OP1, namely avoids the first photoelectrical coupler OP1 misoperation.
One end of described first resistance R1 is connected with the output of described first power module 10, the other end of described first resistance R1 is via described second resistance R2 ground connection, described first resistance R1 is connected with the control pole of described first three terminal regulator U1 with the points of common connection of described second resistance R2, and is connected with the negative electrode of described first luminous tube D01 and the negative electrode of described first three terminal regulator U1 respectively via described 5th electric capacity C5; The plus earth of described first three terminal regulator U1, the anode of described first luminous tube D01 is connected with the output of described first power module 10; The collector electrode of described first phototriode Q01 is connected with the feedback test side of described first power module 10 and the feedback test side of described second source module 20 respectively.
Particularly, described first detection module 30 also comprises the 3rd resistance R3, and wherein, the 3rd resistance R3 is as current-limiting resistance; One end of described 3rd resistance R3 is connected with the output of described first power module 10, and the other end of described 3rd resistance R3 is connected with the anode of described first luminous tube D01.
As shown in Figure 2, described second detection module 40 comprises the 4th resistance R4, the 5th resistance R5, the second three terminal regulator U2, the second photoelectrical coupler OP2 and the 6th electric capacity C6; Described second photoelectrical coupler OP2 comprises the second luminous tube D02 and the second phototriode Q02.Wherein, 4th resistance R4 and the 5th resistance R5 is as divider resistance, dividing potential drop sampling is carried out to the output voltage of second source module 20,6th electric capacity C6 is used for avoiding when the second three terminal regulator U2 not conducting, the second luminous tube D02 of the second photoelectrical coupler OP2 is luminous and cause the second phototriode Q02 conducting of the second photoelectrical coupler OP2, namely avoids the second photoelectrical coupler OP2 misoperation.
One end of described 4th resistance R4 is connected with the output of described second source module 20, the other end of described 4th resistance R4 is via described 5th resistance R5 ground connection, described 4th resistance R4 is connected with the control pole of described second three terminal regulator U2 with the points of common connection of described 5th resistance R5, and is connected with the negative electrode of described second luminous tube D02 and the negative electrode of described second three terminal regulator U2 respectively via described 6th electric capacity C6; The plus earth of described second three terminal regulator U2, the anode of described second luminous tube D02 is connected with the output of described second source module 20; The collector electrode of described second phototriode Q02 is connected with the feedback test side of described first power module 10 and the feedback test side of described second source module 20 respectively.
Particularly, described second detection module 40 also comprises the 6th resistance R6, and wherein, the 6th resistance R6 is as current-limiting resistance; One end of described 6th resistance R6 is connected with the output of described second source module 20, and the other end of described 6th resistance R6 is connected with the anode of described second luminous tube D02.
As depicted in figs. 1 and 2, the operation principle of the utility model Switching Power Supply specifically describes as follows:
Due to the first controller IC 1, first switching tube M1 in the first power module 10, the first transformer TR1, the second diode D2, the first electric capacity C1 and the second electric capacity C2, and second controller IC2, second switch pipe M2 in second source module 20, the second transformer TR2, the 3rd diode D3, the 3rd electric capacity C3 are similar to traditional single switch power supply architecture with the 4th electric capacity C4, therefore, the process that the first power module 10 and second source module 20 produce output voltage is repeated no more herein.The operation principle of first detection module 30 and the second detection module 40 is below mainly described:
In first detection module 30, first resistance R1 and the second resistance R2 is to the output of the first power module 10, namely dividing potential drop is carried out to the output voltage at the points of common connection place of the second diode D2 and the second electric capacity C2, the first sampling voltage obtained after dividing potential drop exports the control pole of the first three terminal regulator U1 to, meanwhile, this first sampling voltage charges to the 5th electric capacity C5.When the first sampling voltage is less than internal reference voltage (as the 2.5V) of the first three terminal regulator U1, first three terminal regulator U1 turns off, now because there is voltage at the 5th electric capacity C5 two ends, the negative electrode making the first luminous tube D01 in the first photoelectrical coupler OP1 is high level, thus the first luminous tube D01 is not luminous, the first phototriode Q01 now in the first photoelectrical coupler OP1 turns off, and namely the first photoelectrical coupler OP1 turns off.When the first sampling voltage reaches the internal reference voltage of the first three terminal regulator U1, first three terminal regulator U1 conducting, now the negative electrode of the first luminous tube D01 is equivalent to receive ground and is low level, thus the first luminous tube D01 is luminous, now the first phototriode Q01 conducting, i.e. the first photoelectrical coupler OP1 ON operation.After first photoelectrical coupler OP1 conducting, first diode D1 and the equal conducting of the 3rd diode D3, now the Voltage Feedback pin FB1 of the first controller IC 1 and Voltage Feedback pin FB2 of second controller IC2 is all equivalent to receive ground, namely the first controller IC 1 and second controller IC2 all detect low level detection signal, thus the first power module 10 and second source module 20 regulate the output voltage of the first power module 10 and second source module 20 simultaneously, make the output voltage of the first power module 10 and second source module 20 equal.
In second detection module 40,4th resistance R4 and the 5th resistance R5 is to the output of second source module 20, namely dividing potential drop is carried out to the output voltage at the points of common connection place of the 4th diode D4 and the 4th electric capacity C4, the second sampling voltage obtained after dividing potential drop exports the control pole of the second three terminal regulator U2 to, meanwhile, this second sampling voltage charges to the 6th electric capacity C6.When the second sampling voltage is less than internal reference voltage (as the 2.5V) of the second three terminal regulator U2, second three terminal regulator U2 turns off, now because there is voltage at the 6th electric capacity C6 two ends, the negative electrode making the second luminous tube D02 in the second photoelectrical coupler OP2 is high level, thus the second luminous tube D02 is not luminous, the second phototriode Q02 now in the second photoelectrical coupler OP2 turns off, and namely the second photoelectrical coupler OP2 turns off.When the second sampling voltage reaches the internal reference voltage of the second three terminal regulator U2, second three terminal regulator U2 conducting, now the negative electrode of the second luminous tube D02 is equivalent to receive ground and is low level, thus the second luminous tube D02 is luminous, now the second phototriode Q02 conducting, i.e. the second photoelectrical coupler OP2 ON operation.After second photoelectrical coupler OP2 conducting, first diode D1 and the equal conducting of the 3rd diode D3, now the Voltage Feedback pin FB1 of the first controller IC 1 and Voltage Feedback pin FB2 of second controller IC2 is all equivalent to receive ground, namely the first controller IC 1 and second controller IC2 all detect low level detection signal, thus the first power module 10 and second source module 20 regulate the output voltage of the first power module 10 and second source module 20 simultaneously, make the output voltage of the first power module 10 and second source module 20 equal.
It should be noted that, because the first power module 10 and second source module 20 cause output voltage there are differences because of material error, thus the first photoelectrical coupler OP1 in first detection module 30 different with the second photoelectrical coupler OP2 in the second detection module 40 time work, namely detection signal is fed back when the first photoelectrical coupler OP1 is different with the second photoelectrical coupler OP2 to the first power module 10 and second source module 20, but, no matter be that the first photoelectrical coupler OP1 works or the second photoelectrical coupler OP2 works, first power module 10 and second source module 20 all detect same detection signal, thus the output voltage of the first power module 10 and second source module 20 can both be regulated simultaneously, make the output voltage of the first power module 10 and second source module 20 equal.
The utility model also provides a kind of electronic equipment, and this electronic equipment can be the equipment that LED television etc. uses Switching Power Supply to power.Electronic equipment of the present utility model comprises Switching Power Supply, and the structure of this Switching Power Supply, operation principle and the beneficial effect that brings are all with reference to above-described embodiment, and this is no longer going to repeat them.
Should be noted that; the technical scheme of each embodiment of the present utility model can be combined with each other; but must be can be embodied as basis with those skilled in the art; when technical scheme combination occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme does not exist, also not the utility model require protection range within.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a Switching Power Supply, it is characterized in that, comprise power input, the first power module, second source module, power output end, for detecting the first detection module of the output voltage of described first power module, and for the second detection module of the output voltage that detects described second source module; Described first detection module or described second detection module feedback detection signal give described first power module and described second source module, make it equal to regulate the output voltage of described first power module and described second source module simultaneously;
The input of described first power module is all connected with described power input with the input of described second source module, the output of described first power module is connected with the input of described power output end and described first detection module respectively, and the output of described second source module is connected with the input of described power output end and described second detection module respectively; The output of described first detection module, the output of described second detection module are all connected with the feedback test side of described first power module and the feedback test side of described second source module.
2. Switching Power Supply as claimed in claim 1, it is characterized in that, described first power module comprises the first controller, the first switching tube, the first transformer, the first diode, the second diode, the first electric capacity and the second electric capacity;
The Voltage Feedback pin of described first controller is connected with the anode of described first diode, and via described first capacity earth, the control signal output pin of described first controller is connected with the grid of described first switching tube; The negative electrode of described first diode is connected with the output of described first detection module and the output of described second detection module respectively; Primary coil one end of described first transformer is connected with described power input, and the other end is connected with the drain electrode of described first switching tube, the source ground of described first switching tube; Secondary coil one end of described first transformer is connected with the anode of described second diode, other end ground connection; The negative electrode of described second diode is via described second capacity earth, and the negative electrode of described second diode is connected with the input of described power output end and described first detection module respectively with the points of common connection of described second electric capacity.
3. Switching Power Supply as claimed in claim 1, it is characterized in that, described second source module comprises second controller, second switch pipe, the second transformer, the 3rd diode, the 4th diode, the 3rd electric capacity and the 4th electric capacity;
The Voltage Feedback pin of described second controller is connected with the anode of described 3rd diode, and via described 3rd capacity earth, the control signal output pin of described second controller is connected with the grid of described second switch pipe; The negative electrode of described 3rd diode is connected with the output of described first detection module and the output of described second detection module respectively; Primary coil one end of described second transformer is connected with described power input, and the other end is connected with the drain electrode of described second switch pipe, the source ground of described second switch pipe; Secondary coil one end of described second transformer is connected with the anode of described 4th diode, other end ground connection; The negative electrode of described 4th diode is via described 4th capacity earth, and the negative electrode of described second tetrode is connected with the input of described power output end and described second detection module respectively with the points of common connection of described 4th electric capacity.
4. Switching Power Supply as claimed in claim 1, it is characterized in that, described first detection module comprises the first resistance, the second resistance, the first three terminal regulator, the first photoelectrical coupler and the 5th electric capacity; Described first photoelectrical coupler comprises the first luminous tube and the first phototriode;
One end of described first resistance is connected with the output of described first power module, the other end of described first resistance is via described second grounding through resistance, described first resistance is connected with the control pole of described first three terminal regulator with the points of common connection of described second resistance, and is connected with the negative electrode of described first luminous tube and the negative electrode of described first three terminal regulator respectively via described 5th electric capacity; The plus earth of described first three terminal regulator, the anode of described first luminous tube is connected with the output of described first power module; The collector electrode of described first phototriode is connected with the feedback test side of described first power module and the feedback test side of described second source module respectively.
5. Switching Power Supply as claimed in claim 4, it is characterized in that, described first detection module also comprises the 3rd resistance; One end of described 3rd resistance is connected with the output of described first power module, and the other end of described 3rd resistance is connected with the anode of described first luminous tube.
6. Switching Power Supply as claimed in claim 1, it is characterized in that, described second detection module comprises the 4th resistance, the 5th resistance, the second three terminal regulator, the second photoelectrical coupler and the 6th electric capacity; Described second photoelectrical coupler comprises the second luminous tube and the second phototriode;
One end of described 4th resistance is connected with the output of described second source module, the other end of described 4th resistance is via described 5th grounding through resistance, described 4th resistance is connected with the control pole of described second three terminal regulator with the points of common connection of described 5th resistance, and is connected with the negative electrode of described second luminous tube and the negative electrode of described second three terminal regulator respectively via described 6th electric capacity; The plus earth of described second three terminal regulator, the anode of described second luminous tube is connected with the output of described second source module; The collector electrode of described second phototriode is connected with the feedback test side of described first power module and the feedback test side of described second source module respectively.
7. Switching Power Supply as claimed in claim 6, it is characterized in that, described second detection module also comprises the 6th resistance; One end of described 6th resistance is connected with the output of described second source module, and the other end of described 6th resistance is connected with the anode of described second luminous tube.
8. an electronic equipment, is characterized in that, comprises the Switching Power Supply in claim 1 to 7 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440075.1U CN204794691U (en) | 2015-06-24 | 2015-06-24 | Switching power supply and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440075.1U CN204794691U (en) | 2015-06-24 | 2015-06-24 | Switching power supply and electronic equipment |
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| CN204794691U true CN204794691U (en) | 2015-11-18 |
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| CN201520440075.1U Expired - Fee Related CN204794691U (en) | 2015-06-24 | 2015-06-24 | Switching power supply and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111857264A (en) * | 2020-07-03 | 2020-10-30 | Oppo广东移动通信有限公司 | Power supply circuit and electronic device |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111857264A (en) * | 2020-07-03 | 2020-10-30 | Oppo广东移动通信有限公司 | Power supply circuit and electronic device |
| CN111857264B (en) * | 2020-07-03 | 2022-04-12 | Oppo广东移动通信有限公司 | Power supply circuit and electronic device |
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