CN103178697B - Export the power-supply system of generating positive and negative voltage - Google Patents
Export the power-supply system of generating positive and negative voltage Download PDFInfo
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- CN103178697B CN103178697B CN201310066320.2A CN201310066320A CN103178697B CN 103178697 B CN103178697 B CN 103178697B CN 201310066320 A CN201310066320 A CN 201310066320A CN 103178697 B CN103178697 B CN 103178697B
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Abstract
The invention provides a kind of power-supply system exporting generating positive and negative voltage.The power-supply system of this output generating positive and negative voltage comprises: reverse voltage transducer, for inputting positive supply upset for negative supply; Voltage reverse circuit, is connected with reverse voltage transducer, for negative supply is converted to upset positive supply; Positive voltage pressurizer, is connected with voltage reverse circuit, for upset positive supply is converted to the first out-put supply, and exports; Negative voltage pressurizer, is connected with reverse voltage transducer, for negative supply is converted to the second out-put supply, and exports; Wherein, being the positive supply of first object voltage sized by the first out-put supply, is the negative supply of the second target voltage sized by the second out-put supply.Power-supply system of the present invention is not subject to the restriction of input and output voltage, input voltage and requirement output voltage close to time can normally use, do not need to consider the buck relation between constrained input, structure is simple, circuit cost is low.
Description
Technical field
The present invention relates to electronic applications, in particular to a kind of power-supply system exporting generating positive and negative voltage.
Background technology
Power supply is part important in electronic product.Less power supply is used to be current technological trend to simplify power reguirements in electronic product.But under the electronic applications that some are special, also need to use multiple power supply to power, particularly under some application, positive-negative power must be used to power simultaneously.
The electronic application of the existing positive-negative power simultaneously used comprises: the local side interface circuit of black phone, liquid crystal display, OLED(Organic Light-Emitting Diode) display, CCD(Charge Coupled Device, charge coupled device) fore-end of biased, power amplification circuit and instrument and meter analog input.Except the front end analogue part of instrument and meter, other is all large-scale application of power, and the commercial prod of existing special in a large number maturation occurs.For the particular/special requirement of front end analogue part owing to testing of instrument and meter, the general discrete power electrical combination that uses realizes positive-negative power.
The existing power supply chip of positive-negative power and the power circuit of providing adopts the dc-dc of booster type to export positive supply and negative supply.Employing boosting type converter necessarily requires, certain Negative Pressure Difference is there is between input voltage and output voltage, namely for positive voltage part, output voltage must be less than by input voltage, this be due to current duplicate supply output circuit structure input and output voltage height relation indefinite time cannot use, such as when input be possible change within the scope of 4.5V ~ 5.5V, export and will aspire for stability 5V directly cannot use booster type power supply changeover device of the prior art.
The output voltage noise of booster type power supply changeover device of the prior art strengthens in addition, in the electronic product requiring low noise, voltage stabilization, uses this transducer to be also need additional configurations power purification circuit, improves the complexity of circuit.
For the booster type power supply changeover device exporting positive-negative power in prior art to input voltage and output voltage cannot be applied to close to the problem of occasion, at present effective solution is not yet proposed.
Summary of the invention
The present invention aims to provide a kind of power-supply system exporting generating positive and negative voltage, to solve in prior art the booster type power supply changeover device that exports positive-negative power to being applied to input voltage and the output voltage problem close to occasion.
To achieve these goals, according to an aspect of the present invention, a kind of power-supply system exporting generating positive and negative voltage is provided.The power-supply system of this output generating positive and negative voltage comprises: reverse voltage transducer, for inputting positive supply upset for negative supply; Voltage reverse circuit, is connected with reverse voltage transducer, for negative supply is converted to upset positive supply; Positive voltage pressurizer, is connected with voltage reverse circuit, for upset positive supply is converted to the first out-put supply, and exports; Negative voltage pressurizer, is connected with reverse voltage transducer, for negative supply is converted to the second out-put supply, and exports; Wherein, being the positive supply of first object voltage sized by the first out-put supply, is the negative supply of the second target voltage sized by the second out-put supply.
Further, the power-supply system of output generating positive and negative voltage provided by the invention also comprises: feedback circuit.This feedback circuit, is connected respectively with positive voltage pressurizer and negative voltage pressurizer, for exporting the 3rd feedback signal according to the first pressure reduction and the second pressure reduction to reverse voltage transducer; Reverse voltage transducer is also for controlling the voltage of negative supply and upset positive supply according to the 3rd feedback signal, wherein, the first pressure reduction is the voltage difference of upset positive supply and the first out-put supply, and the second pressure reduction is the voltage difference of negative supply and the second out-put supply.
Further, above-mentioned feedback circuit comprises: the first amplifier, the second amplifier, the 3rd amplifier, wherein, first amplifier, for gathering the first pressure reduction, and send the first feedback signal according to the first pressure reduction to the 3rd amplifier, second amplifier, for gathering the second pressure reduction, and send the second feedback signal according to the second pressure reduction to the 3rd amplifier, 3rd amplifier, for gathering the first feedback signal and the second feedback signal, and exports the 3rd feedback signal according to the first feedback signal and the second feedback signal to reverse voltage transducer.
Further, the first amplifier and the second amplifier are differential amplifier, and the forward differential input end of this first amplifier connects the output of positive voltage pressurizer, and the backward difference input of the first amplifier connects the input of positive voltage pressurizer; The backward difference input of the second amplifier connects the output of negative voltage pressurizer, and the forward differential input end of the second amplifier connects the input of negative voltage pressurizer.
Further, the first amplifier and the second amplifier export and are amplitude limit output, wherein, when the first pressure reduction is more than or equal to the first default pressure reduction, the output saturation of the first amplifier, when the second pressure reduction is more than or equal to the second default pressure reduction, the output saturation of the second amplifier.
Further, the first input end of the 3rd amplifier is connected with the output of the first amplifier, for receiving the first feedback signal; Second input of the 3rd amplifier is connected with the output of the second amplifier, for receiving the second feedback signal; 3rd amplifier is also cumulative to obtain feedback signal cumulative sum for carrying out the first feedback signal and the second feedback signal, and exports the 3rd feedback signal according to feedback signal cumulative sum to reverse voltage transducer.
Further, above-mentioned reverse voltage transducer comprises positive voltage input, output voltage feedback end, compensates input and output switching terminal, wherein, compensates input and is connected with feedback circuit, for receiving the 3rd feedback signal; Positive voltage input connects input positive supply; Output voltage feedback end, is connected with the input of negative voltage pressurizer, for exporting negative supply; Output switching terminal, connect first node by the first inductor, for exporting the switching signal of reverse voltage transducer, wherein, first node is the connected node of the common port of positive voltage pressurizer and the common port of negative voltage pressurizer.
Further, voltage reverse circuit is the switching power circuit of charge pump construction, wherein, and the input connecting valve output of this voltage reverse circuit, the output of this voltage reverse circuit connects positive voltage pressurizer, and the common port of this voltage reverse circuit connects first node.
Further, voltage reverse circuit comprises the first electric capacity, the first diode, the second diode, wherein the first end of the first electric capacity is the input of this voltage reverse circuit, the cathode terminal of the first diode is the output of this voltage reverse circuit, the anode tap of the second diode is the common port of this voltage reverse circuit, and the cathode terminal of the second end of the first electric capacity, the anode tap of the first diode and the second diode is connected to Section Point.
Further, positive voltage pressurizer and negative voltage pressurizer all use three terminal integrated voltage stabilizer.
Apply technical scheme of the present invention, technical scheme of the present invention adopts and input power is first turned to negative voltage, then overturns back the structure of positive voltage.And this circuit for reversing structure is not subject to the restriction of input and output voltage, input voltage and requirement output voltage close to time can normally use, do not need to consider the buck relation between constrained input, structure is simple, circuit cost is low.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the power-supply system of output generating positive and negative voltage according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the feedback circuit of the power-supply system of output generating positive and negative voltage according to the embodiment of the present invention;
Fig. 3 is the schematic diagram of the voltage reverse circuit of output generating positive and negative voltage power-supply system according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of a kind of physical circuit of the power-supply system of output generating positive and negative voltage according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiments provide a kind of power-supply system exporting generating positive and negative voltage, Fig. 1 is the schematic diagram of the power-supply system of output generating positive and negative voltage according to the embodiment of the present invention, as shown in Figure 1, the power-supply system of this output generating positive and negative voltage comprises: reverse voltage transducer 11, voltage reverse circuit 12, positive voltage pressurizer 13 and negative voltage pressurizer 14, the input of voltage reverse circuit 12 is connected with the output of reverse voltage transducer 11, the input of positive voltage pressurizer 13 is connected with the output of voltage reverse circuit 12, the input of negative voltage pressurizer 14 is connected with the output of reverse voltage transducer 11, wherein, reverse voltage transducer 11 will be for inputting positive supply upset for negative supply, voltage reverse circuit 12 is for being converted to upset positive supply by negative supply, positive voltage pressurizer 13 is for being converted to the first out-put supply by upset positive supply, and export, negative voltage pressurizer 14 for negative supply is converted to the second out-put supply, and exports.Wherein, being the positive supply of first object voltage sized by the first out-put supply, is the negative supply of the second target voltage sized by the second out-put supply.
The power-supply system of the output generating positive and negative voltage of the embodiment of the present invention adopts and input power is first turned to negative voltage, then overturns back the structure of positive voltage.And this circuit for reversing structure utilizes reverse voltage transducer 11 to regulate its output voltage, thus make the power-supply system of output generating positive and negative voltage not be subject to the restriction of input and output voltage, input voltage and requirement output voltage close to time can normally use, do not need to consider the buck relation between constrained input, structure is simple, circuit cost is low.
In order to ensure the condition of work of above-mentioned positive voltage pressurizer 13 and negative voltage pressurizer 14, the power-supply system of the output generating positive and negative voltage of the present embodiment can also comprise: feedback circuit.Input and the output of this feedback circuit and positive voltage pressurizer 13 and negative voltage pressurizer 14 are connected respectively.This feedback circuit is according to the circuit signal of positive voltage pressurizer 13 and negative voltage pressurizer 14, feedback signal is sent to reverse voltage transducer 11, so that reverse voltage transducer 11 can regulate the voltage of negative supply, ensure that the power-supply system of the output generating positive and negative voltage of embodiment exports satisfactory power supply.
This feedback circuit is used for exporting the 3rd feedback signal according to the first pressure reduction and the second pressure reduction to reverse voltage transducer; Reverse voltage transducer is also for controlling the voltage of negative supply and upset positive supply according to the 3rd feedback signal, wherein, the first pressure reduction is the voltage difference of upset positive supply and the first out-put supply, and the second pressure reduction is the voltage difference of negative supply and the second out-put supply.
Fig. 2 shows a kind of concrete form of the feedback circuit of the power-supply system of the output generating positive and negative voltage according to the embodiment of the present invention, and this feedback circuit comprises: the first amplifier A1, the second amplifier A2, the 3rd amplifier A3.In the middle of circuit, first amplifier A1, for gathering the first pressure reduction V1, and send the first feedback signal according to the first pressure reduction V1 to the 3rd amplifier A3, the second amplifier A2, for gathering the second pressure reduction V2, and send the second feedback signal according to the second pressure reduction V2 to the 3rd amplifier A3,3rd amplifier A3, for gathering the first feedback signal and the second feedback signal, and exports the 3rd feedback signal according to the first feedback signal and the second feedback signal to reverse voltage transducer 11.
Above-mentioned first amplifier A1 and the second amplifier A2 can concrete choice for use differential amplifier, the forward differential input end of this first amplifier A1 connects the output of positive voltage pressurizer 13, and the backward difference input of the first amplifier A1 connects the input of positive voltage pressurizer 13; The backward difference input of the second amplifier A2 connects the output of negative voltage pressurizer 14, and the forward differential input end of the second amplifier A2 connects the input of negative voltage pressurizer 14.
Particularly, general positive voltage pressurizer and negative voltage pressurizer need input and the general pressure reduction relation of output demand fulfillment, and namely positive voltage pressurizer and negative voltage pressurizer are buck regulator.In this case, the operation principle of above-mentioned feedback circuit is: be that the first amplifier A1 and the second discharger A2 arrange default operting differential pressure in advance, is the first amplifier and arranges the first default pressure reduction VD1, is that the second amplifier arranges the second default pressure reduction VD2.When the first pressure reduction V1 be less than first preset pressure reduction VD1 time, the first feedback signal be one with the signal of the value linear correlation of VD1-V1, the i.e. amplitude of the first feedback signal and VD1-V1 linear correlation.Similarly, when the second pressure reduction V2 be less than second preset pressure reduction VD2 time, the second feedback signal be one with the signal of the value linear correlation of VD2-V2, the i.e. amplitude of the second feedback signal and VD2-V2 linear correlation.
When the first pressure reduction V1 and the second pressure reduction V2 has met the condition of work of positive voltage pressurizer 13 and negative voltage pressurizer 14, can the output amplitude of limit value first amplifier A1 and the second amplifier A2, namely limit the amplitude of the first feedback signal and the second feedback signal, now, first amplifier A1, second amplifier A2 exports and is amplitude limit output, wherein, when the first pressure reduction V1 is more than or equal to the first default pressure reduction VD1, the output saturation of the first amplifier A1, when the second pressure reduction V2 is more than or equal to the second default pressure reduction VD2, the output saturation of the second amplifier A2.
The effect of the 3rd amplifier A3 is processed the first feedback signal and the second feedback signal, adjust it to make reverse voltage transducer 11 to export, namely the voltage of negative supply is adjusted, and the voltage overturning positive supply is directly related with the voltage of negative supply, therefore, reverse voltage transducer 11 controls the voltage of negative supply to ensure the condition of work of positive voltage pressurizer 13 and negative voltage pressurizer 14.The concrete structure of the 3rd amplifier A3 can be: the first input end of the 3rd amplifier A3 is connected with the output of the first amplifier A1, for receiving the first feedback signal; Second input of the 3rd amplifier A3 is connected with the output of the second amplifier A2, for receiving the second feedback signal.The circuit characteristic of the 3rd amplifier A3 is: carry out cumulative to obtain feedback signal cumulative sum V1+V2 to the first feedback signal and the second feedback signal, and export the 3rd feedback signal according to feedback signal cumulative sum to reverse voltage transducer 11, thus the 3rd feedback signal directly reflects the first pressure reduction V1 and the second pressure reduction V2, the feedback control loop of feedback circuit can meet the condition of work of positive voltage pressurizer 13 and negative voltage pressurizer 14.
First amplifier A1 and the second amplifier A2 exports and can be amplitude limit output, wherein, when the first pressure reduction V1 is more than or equal to the first default pressure reduction VD1, the output saturation of the first amplifier A1, when the second pressure reduction V2 is more than or equal to the second default pressure reduction VD2, the output saturation of the second amplifier A2.3rd amplifier A3 is at the output saturation as the first amplifier A1 or any road of the second amplifier A2, and when another road keeps normal range (NR) to export, the 3rd amplifier A3 keeps ratio to export.When the output of the first amplifier A1 and the second amplifier A2 two-way is all saturated, the 3rd amplifier A3 also can be set to output saturation.
Above first amplifier A1, the second amplifier A2, the 3rd amplifier A3 all can use existing computing discharge circuit to realize, as long as its input-output characteristic meets above function.Wherein the default pressure reduction VD2 of the first default pressure reduction VD1 and second can be arranged according to the running parameter of positive voltage pressurizer 13 and negative voltage pressurizer 14.
Reverse voltage transducer 11 can use integrated power supply flip-chip, also discrete circuit can be used to build, particularly, this reverse voltage transducer 11 can comprise positive voltage input Vi+, output voltage feedback end Vout, compensate input CC and output switching terminal LX, wherein, compensating input CC to be connected with feedback circuit, being specially the output compensating input CC and connect the 3rd amplifier A3, for receiving the 3rd feedback signal; Positive voltage input Vi+ connects input positive supply; Output voltage feedback end Vout is connected with the input of negative voltage pressurizer 14, for exporting negative supply; Output switching terminal LX, connect first node by the first inductor, for exporting the switching signal of reverse voltage transducer 11, wherein, first node is the connected node of the common port of positive voltage pressurizer 13 and the common port of negative voltage pressurizer 14.
The power-supply system of the output generating positive and negative voltage of the embodiment of the present invention preferably adopts a kind of switching power circuit of charge pump construction as voltage reverse circuit 12, is again overturn by negative voltage power supply as positive voltage source, to export positive voltage.Fig. 3 is the schematic diagram of the voltage reverse circuit of the output generating positive and negative voltage power-supply system of the embodiment of the present invention, this voltage reverse circuit comprises the first electric capacity C1, first diode D1, second diode D2, wherein the first end of the first electric capacity C1 is the input of this voltage reverse circuit 12, the cathode terminal of the first diode D1 is the output of this voltage reverse circuit 12, the anode tap of the second diode D2 is the common port of this voltage reverse circuit 12, second end of the first electric capacity C1, the anode tap of the first diode D1 and the cathode terminal of the second diode D2 are connected to Section Point, the input connecting valve output LX of voltage reverse circuit 12, the output of this voltage reverse circuit 12 connects positive voltage pressurizer 13, the common port of this voltage reverse circuit 12 connects first node.
Positive voltage pressurizer in the present embodiment and described negative voltage pressurizer can select three terminal integrated voltage stabilizer, and the operation strategies of this integrated regulator is comparatively wide, and cost is lower.Concrete model can be selected according to output voltage, such as, during output ± 3V, can select 78L03 and 79L03, when output ± 5V, can select 78L05 and 79L05.
Below in conjunction with the circuit diagram of a kind of physical circuit of the present embodiment, the work process of the power-supply system of the output generating positive and negative voltage of the present embodiment is described.Fig. 4 is the schematic diagram of a kind of physical circuit of the power-supply system of the output generating positive and negative voltage of the embodiment of the present invention, this circuit use MAX735 chip as reverse voltage transducer 11 realize ± power supply of 3V exports.In Fig. 4, MAX735 is the upset power supply of inductive energy storage, the control of the 3rd feedback signal that its output voltage exports by the 3rd amplifier A3; 78L03 and 79L03 is the three terminal integrated voltage stabilizer of positive voltage and negative voltage respectively, and resistance R1 and resistance R2 is used for arranging the output voltage of positive voltage pressurizer 13, and resistance R3 and resistance R4 is used for arranging the output voltage of negative voltage pressurizer 14.First amplifier A1 and the second amplifier A2 is used for checking the difference of pressure reduction on 78L03 and 79L03 input/output terminal and preset operting differential pressure VD respectively.First amplifier A1, second amplifier A2, 3rd amplifier A3 is all the amplifier of output violent change, its characteristics design is for when the first amplifier A1 and the second amplifier A2 detects that pressure reduction is greater than default pressure reduction VD, its output saturation, when pressure reduction is close with when being less than VD, export a feedback signal proportional with the difference of pressure reduction and VD, 3rd amplifier A3 then adds with rear output the output of the first amplifier A1 and the second amplifier A2 with the output voltage of control MAX735, wherein the 3rd amplifier A3 when the first amplifier A1 or any road of the second amplifier A2 saturated, another road keeps ratio to export when keeping normal range (NR) to export.Above control loop ensure that the output voltage of MAX735 can meet the minimum differential pressure requirements of 78L03 and 79L03, and the output that 78L03 and 79L03 draws oneself up separately.In figure, the implication of other pin of MAX735 is: Vref is that reference voltage exports, and export the reference voltage of a 1.23V, SS is soft start end.
The negative supply that the present invention adopts the Switching Power Supply of an inductive energy storage structure to realize polarity upset exports, and then utilize charge pump construction Switching Power Supply that negative supply is turned to positive polarity and export, circuit structure is simpler than prior art.Simultaneously due to this overturn structure, when inputting, output voltage close to time do not need to consider to use buck.In addition, in conjunction with the feature of instrument and meter application, can purge segment be inserted inside circuit, further simplify the design of whole power-supply system.Above circuit is only a kind of specific implementation form of the present embodiment in addition, and the circuit that the chip device in fact used in circuit all can use the circuit chip of other function or discrete device to build realizes.
Apply technical scheme of the present invention, technical scheme of the present invention adopts and input power is first turned to negative voltage, then overturns back the structure of positive voltage.And this circuit for reversing structure is not subject to the restriction of input and output voltage, input voltage and requirement output voltage close to time can normally use, do not need to consider the buck relation between constrained input, structure is simple, circuit cost is low.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. export a power-supply system for generating positive and negative voltage, it is characterized in that, comprising:
Reverse voltage transducer, for inputting positive supply upset for negative supply;
Voltage reverse circuit, is connected with described reverse voltage transducer, for described negative supply is converted to upset positive supply;
Positive voltage pressurizer, is connected with described voltage reverse circuit, for described upset positive supply is converted to the first out-put supply, and exports;
Negative voltage pressurizer, is connected with described reverse voltage transducer, for described negative supply is converted to the second out-put supply, and exports;
Wherein, being the positive supply of first object voltage sized by described first out-put supply, is the negative supply of the second target voltage sized by described second out-put supply;
Wherein, also comprise: feedback circuit, described feedback circuit, be connected respectively with described positive voltage pressurizer and described negative voltage pressurizer, for according to the first pressure reduction and the second pressure reduction to described reverse voltage transducer output feedback signal; Described reverse voltage transducer is also for controlling the voltage of described negative supply and described upset positive supply according to described feedback signal, wherein, described first pressure reduction is the voltage difference of described upset positive supply and described first out-put supply, and described second pressure reduction is the voltage difference of described negative supply and described second out-put supply.
2. the power-supply system of output generating positive and negative voltage according to claim 1, is characterized in that, described feedback circuit comprises: the first amplifier, the second amplifier, the 3rd amplifier, wherein,
Described first amplifier, for gathering the first pressure reduction, and sends the first feedback signal according to described first pressure reduction to described 3rd amplifier,
Described second amplifier, for gathering the second pressure reduction, and sends the second feedback signal according to described second pressure reduction to described 3rd amplifier,
Described 3rd amplifier, for gathering described first feedback signal and described second feedback signal, and exports described feedback signal according to described first feedback signal and described second feedback signal to described reverse voltage transducer.
3. the power-supply system of output generating positive and negative voltage according to claim 2, it is characterized in that, described first amplifier and described second amplifier are differential amplifier, the forward differential input end of this first amplifier connects the output of described positive voltage pressurizer, and the backward difference input of described first amplifier connects the input of described positive voltage pressurizer; The backward difference input of described second amplifier connects the output of described negative voltage pressurizer, and the forward differential input end of described second amplifier connects the input of described negative voltage pressurizer.
4. the power-supply system of output generating positive and negative voltage according to claim 3, it is characterized in that, described first amplifier and described second amplifier export and are amplitude limit output, wherein, when described first pressure reduction is more than or equal to the first default pressure reduction, the output saturation of described first amplifier, when described second pressure reduction is more than or equal to the second default pressure reduction, the output saturation of described second amplifier.
5. the power-supply system of output generating positive and negative voltage according to claim 2, is characterized in that,
The first input end of described 3rd amplifier is connected with the output of described first amplifier, for receiving described first feedback signal;
Second input of described 3rd amplifier is connected with the output of described second amplifier, for receiving described second feedback signal;
Described 3rd amplifier is also cumulative to obtain feedback signal cumulative sum for carrying out described first feedback signal and described second feedback signal, and exports described feedback signal according to described feedback signal cumulative sum to described reverse voltage transducer.
6. the power-supply system of output generating positive and negative voltage according to claim 1, is characterized in that, described reverse voltage transducer comprises positive voltage input, output voltage feedback end, compensates input and output switching terminal, wherein,
Described compensation input is connected with described feedback circuit, for receiving described feedback signal;
Described positive voltage input connects described input positive supply;
Described output voltage feedback end, is connected with the input of described negative voltage pressurizer, for exporting described negative supply;
Described output switching terminal, first node is connected by the first inductor, for exporting the switching signal of described reverse voltage transducer, wherein, described first node is the connected node of the common port of described positive voltage pressurizer and the common port of described negative voltage pressurizer.
7. the power-supply system of output generating positive and negative voltage according to claim 6, it is characterized in that, described voltage reverse circuit is the switching power circuit of charge pump construction, wherein, the input of this voltage reverse circuit connects described output switching terminal, the output of this voltage reverse circuit connects described positive voltage pressurizer, and the common port of this voltage reverse circuit connects described first node.
8. the power-supply system of output generating positive and negative voltage according to claim 7, it is characterized in that, described voltage reverse circuit comprises the first electric capacity, the first diode, the second diode, the first end of wherein said first electric capacity is the input of this voltage reverse circuit, the cathode terminal of described first diode is the output of this voltage reverse circuit, the anode tap of described second diode is the common port of this voltage reverse circuit, and the cathode terminal of the second end of described first electric capacity, the anode tap of described first diode and described second diode is connected to Section Point.
9. the power-supply system of output generating positive and negative voltage according to claim 1, is characterized in that, described positive voltage pressurizer and described negative voltage pressurizer all use three terminal integrated voltage stabilizer.
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| CN104967306A (en) * | 2015-06-10 | 2015-10-07 | 上海鼎讯电子有限公司 | Voltage conversion circuit |
| CN107918435A (en) * | 2017-12-28 | 2018-04-17 | 苏州广林达电子科技有限公司 | Booster circuit |
| CN109600041A (en) * | 2019-01-14 | 2019-04-09 | 武汉精立电子技术有限公司 | A kind of low ripple regulated power supply output circuit |
| CN113190072B (en) * | 2021-03-30 | 2022-04-26 | 深圳市崧盛电子股份有限公司 | Negative voltage regulator |
| CN113687681A (en) * | 2021-08-20 | 2021-11-23 | 京东方科技集团股份有限公司 | Power module, operational amplifier driving and dimming glass |
| CN114599186B (en) * | 2022-03-28 | 2023-10-31 | Oppo广东移动通信有限公司 | Shell assembly and electronic equipment |
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