CN203225657U - A voltage-reducing circuit - Google Patents
A voltage-reducing circuit Download PDFInfo
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- CN203225657U CN203225657U CN 201320126992 CN201320126992U CN203225657U CN 203225657 U CN203225657 U CN 203225657U CN 201320126992 CN201320126992 CN 201320126992 CN 201320126992 U CN201320126992 U CN 201320126992U CN 203225657 U CN203225657 U CN 203225657U
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- voltage
- divider resistance
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Abstract
The embodiment of the utility model discloses a voltage-reducing circuit comprising a filtering module, an oscillating module, and an inducing module. The filtering module is used for performing filtering on input voltage and then outputting the input voltage. The oscillating module is used for receiving the filtered voltage to form oscillating voltage. The inducing module is connected with the oscillating module and is used for receiving the oscillating voltage generated by the oscillating module and generating corresponding induced electromotive force. When the polarity of the induced electromotive force is opposite to that of the input voltage, output voltage is reduced. By using the voltage-reducing circuit, cost can be reduced and voltage reduction can be achieved highly efficiently. In addition, the voltage-reducing circuit has a small size.
Description
Technical field
The utility model relates to electronic applications, relates in particular to a kind of reduction voltage circuit.
Background technology
Present existing reduction voltage circuit mostly uses Switching Power Supply to realize, must use fixing simulation integrated chip to design like this.Cost height not only, efficient is low, and the volume of circuit is bigger.
The utility model content
The utility model embodiment technical problem to be solved is, a kind of reduction voltage circuit is provided.Can low-cost, high efficiency realization step-down, and the volume of circuit is less.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of reduction voltage circuit, comprising:
Filtration module is used for that input voltage is carried out filtering and handles back output;
Oscillation module is used for receiving described filtered voltage, forms oscillating voltage;
The module of inducting links to each other with described oscillation module, is used for receiving the oscillating voltage that described oscillation module produces, and generates corresponding induced electromotive force, when described induced electromotive force is opposite with described input voltage polarity, and the reduction output voltage.
Wherein, described filtration module comprises first filter capacitor, and the positive pole of described filter capacitor connects voltage input end, minus earth.
Wherein, described oscillation module comprises first triode, second triode, three-terminal voltage regulator, diode, first divider resistance, second divider resistance, the 3rd divider resistance, the 4th divider resistance, the 5th divider resistance and first charging capacitor, the emitter of described first triode connects described voltage input end, collector electrode connects the anode of described three-terminal voltage regulator by the 5th divider resistance, base stage connects the collector electrode of described second triode, the base stage of described second triode connects the negative electrode of described three-terminal voltage regulator, emitter is by the described second divider resistance ground connection, the negative pole of described diode connects the collector electrode of described first triode, plus earth, described first divider resistance is connected between the emitter of the base stage of described first triode and described second triode, described the 3rd divider resistance is connected between the base stage of the base stage of described second triode and described first triode, the anode of the described three-terminal voltage regulator of described the 4th divider resistance one termination, other end ground connection, the control utmost point of described three-terminal voltage regulator connects the described module of inducting, the anode of described first charging capacitor connects the common node of described first divider resistance and described second divider resistance, minus earth.
Wherein, the described module of inducting comprises inductance, adjustable resistance and second charging capacitor, the collector electrode of described first triode of one termination of described inductance, another termination voltage output end, described adjustable resistance is connected between described voltage output end and the ground, and described second charging capacitor is in parallel with described adjustable resistance, and positive pole connects described voltage output end, minus earth, the common node of described second charging capacitor and described adjustable resistance connect the control utmost point of described three-terminal voltage regulator.
Wherein, the described module of inducting also comprises the 6th divider resistance, and described the 6th divider resistance is connected between described adjustable resistance and the ground.
Wherein, described circuit also comprises the 7th divider resistance, and described the 7th divider resistance is connected between the base stage and described first divider resistance of described first triode.
Wherein, described circuit also comprises second filter capacitor, and the positive pole of described second filter capacitor connects described voltage output end, minus earth.
Wherein, the model of described first triode is TIP115, and the model of described second triode is MPSA20.
Wherein, the model of described three-terminal voltage regulator is TL431.
Wherein, the model of described diode is IN5823.
Implement the utility model embodiment, have following beneficial effect:
By using oscillation module 2 to form oscillating voltages, induct in utilization that module generates with the opposite polarity induced electromotive force of input voltage, thereby realize reducing the effect of output voltage, need not use the simulation integrated chip, cost is low, the efficient height, the volume of circuit is little; Use two triodes to cooperate three-terminal voltage regulator to realize the output of oscillating voltage, the recycling inductance generates and the opposite polarity induced electromotive force of input voltage, realizes reducing the purpose of output voltage, and circuit structure is simple, stable performance.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the connection diagram of first embodiment of the utility model reduction voltage circuit;
Fig. 2 is the circuit diagram of second embodiment of the utility model reduction voltage circuit.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, be the connection diagram of first embodiment of the utility model reduction voltage circuit, in the present embodiment, described circuit comprises: filtration module 1, oscillation module 2, the module 3 of inducting.
Described filtration module 1 is used for that input voltage is carried out filtering and handles back output;
Described oscillation module 2 is used for receiving described filtered voltage, forms oscillating voltage;
The described module 3 of inducting links to each other with described oscillation module 2, is used for receiving the oscillating voltage that described oscillation module 2 produces, and generates corresponding induced electromotive force, when described induced electromotive force is opposite with described input voltage polarity, reduces output voltage.
By using oscillation module 2 to form oscillating voltages, induct in utilization that module generates with the opposite polarity induced electromotive force of input voltage, thereby realize reducing the effect of output voltage, need not use the simulation integrated chip, cost is low, the efficient height, the volume of circuit is little.
Please refer to Fig. 2, be the circuit diagram of second embodiment of reduction voltage circuit, in the present embodiment, described circuit comprises: filtration module, oscillation module, the module of inducting.
Preferably, described filtration module comprises the first filter capacitor C0, and the positive pole of described filter capacitor C0 connects voltage input end, minus earth.
Described oscillation module comprises the first triode Q1, the second triode Q2, three-terminal voltage regulator Z, diode D, the first divider resistance R1, the second divider resistance R2, the 3rd divider resistance R3, the 4th divider resistance R4, the 5th divider resistance R5 and the first charging capacitor C1, the emitter of the described first triode Q1 connects described voltage input end, collector electrode connects the anode of described three-terminal voltage regulator Z by the 5th divider resistance R5, base stage connects the collector electrode of the described second triode Q2, the base stage of the described second triode Q2 connects the negative electrode of described three-terminal voltage regulator Z, emitter is by the described second divider resistance R2 ground connection, the negative pole of described diode D1 connects the collector electrode of the described first triode Q1, plus earth, the described first divider resistance R1 is connected between the emitter of the base stage of the described first triode Q1 and the described second triode Q2, described the 3rd divider resistance R3 is connected between the base stage of the base stage of the described second triode Q2 and the described first triode Q1, the anode of the described three-terminal voltage regulator Z of described the 4th divider resistance R4 one termination, other end ground connection, the control utmost point of described three-terminal voltage regulator Z connects the described module of inducting, the anode of the described first charging capacitor C1 connects the common node of the described first divider resistance R1 and the described second divider resistance R2, minus earth.
The described module of inducting comprises inductance L, adjustable resistance R0 and the second charging capacitor C2, the collector electrode of the described first triode Q1 of one termination of described inductance L, another termination voltage output end, described adjustable resistance R0 is connected between described voltage output end and the ground, the described second charging capacitor C2 is in parallel with described adjustable resistance R0, positive pole connects described voltage output end, minus earth, and the common node of the described second charging capacitor C2 and described adjustable resistance R0 connects the control utmost point of described three-terminal voltage regulator Z.
More preferably, the described module of inducting also comprises the 6th divider resistance R6, and described the 6th divider resistance R6 is connected between described adjustable resistance R0 and the ground.
Described circuit also comprises the 7th divider resistance R7, and described the 7th divider resistance R7 is connected between the base stage and the described first divider resistance R1 of the described first triode Q1.
Described circuit also comprises the second filter capacitor C3, and the positive pole of the described second filter capacitor C3 connects described voltage output end, minus earth.
The model of the described first triode Q1 is TIP115, and the model of the described second triode Q2 is MPSA20.
The model of described three-terminal voltage regulator Z is TL431.
The model of described diode D1 is IN5823.
Particularly, as shown in Figure 2, when prime had the voltage input to begin to power, the B point voltage rose, and the A point voltage reduces, the Q1 conducting, and energy level transmission backward powers to the load.Output voltage rises to set point from 0.At this moment Z begins action, and the B point voltage begins to reduce, and when the B point voltage was reduced to certain value, Q2 ended, and the A point voltage rises, and Q1 ends, and at this moment the energy by the inductance L storage powers to the load, and D1 provides current circuit.After inductance L was powered a period of time, output voltage began to reduce, and when output voltage was reduced to certain set point, Q2 is conducting again, and Q1 is conducting thereupon also, powers to the load by inductance L again.Circulation so repeatedly.Whole process specifically comprises two states, and first kind: Q1 enters conducting state.This moment, A1 was upgraded to high potential, and the current potential that makes A2 order by R5 and R4 dividing potential drop rises, and relative D point current potential descends, and the B point rises, and the A point descends, and offers Q1 conducting electric current, keeps A1 point high potential.This positive feedback forms by R5 and R4, does not have electric capacity in the feedback, and directly effect causes D point current potential to descend relatively.Also have one tunnel negative feedback in the circuit,---C---D by node A1 makes D point current potential rise, but therefore this negative feedback path has time-delay through inductance L, can put aside at the initial stage of Q1 conducting.Raise because of A2 point current potential this moment, and the decline of D point or no change substantially cause voltage between D and the A2 less than the reference voltage of Z1, make Z1 end.R3 makes the Q2 conducting, provides base current to Q1 on the one hand, also charges to C1 through emitter in addition, and the magnitude of voltage that fills is determined by multiplication factor and the R2 of Vin, R3, Q2 basically.The voltage of A1 is through after of short duration stabilization time, because the electric current gradual change by inductance L, make the C point voltage progressively raise, cause the D point voltage to raise, voltage progressively approaches or when reaching the reference voltage of Z1, other next state conversion beginning: D point rises between D and A2------rising of A point---the A1 point decline that descends of B point, and Q1 ends at this moment,---decline of A2 point---relative D point just rises via R5 and R4 dividing potential drop, enters second kind of state.Second kind: the Q1 cut-off state.This moment, Q1 ended, because the B point voltage descends rapidly in transfer process, and the E point causes Q2 base stage, emitter-base bandgap grading anti-inclined to one side because of the reason of C1, and Q2 also ends, the Z conducting.Load current keeps continuously by D1 and L.The E point voltage is that the voltage on the C1 reduces gradually, up to the value of the dividing point of R1 and R2.Zhuan Huan condition is that the C point voltage descends and drives the D point voltage and descends again, thereby and the emitter forward that therefore makes the B point voltage be increased to Q2 make the Q2 conducting, and make the Q1 conducting again.Enter next state.If there is not C1, just can't enter second kind of state, because Q2 can not end.The feedback network that A is ordered to D has 2, and one is A---R5---A2---D; To also have one be A---inductance L---C---D.These two feedback network directions are opposite, time is different, the oscillatory work that has just caused circuit to go round and begin again thus, produce a switching frequency, the Push And Release that this switching frequency will make Q1 not stop, thereby make and generate an induced electromotive force on the inductance L, this polarity of voltage direction changes with the closure of Q1, when Q1 is closed, produce one and the rightabout induced electromotive force of input voltage, thereby play hypotensive effect, when Q1 opens, produce an induced electromotive force with the input voltage equidirectional, powering load.Wherein, one of key point is the voltage that E is ordered, because this directly influences the operating frequency in loop, the E point voltage is more low, and circuit work frequency is more high.Certainly, energy storage inductor L also influences operating frequency, and the energy that can store is more few, and frequency is also more high.Load is more heavy in addition, and frequency also can be more high.
Use two triodes to cooperate three-terminal voltage regulator to realize the output of oscillating voltage, the recycling inductance generates and the opposite polarity induced electromotive force of input voltage, realizes reducing the purpose of output voltage, and circuit structure is simple, stable performance.
Need to prove that each embodiment in this specification all adopts the mode of going forward one by one to describe, what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For device embodiment, because it is similar substantially to method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
By the description of above-described embodiment, the utlity model has following advantage:
By using oscillation module 2 to form oscillating voltages, induct in utilization that module generates with the opposite polarity induced electromotive force of input voltage, thereby realize reducing the effect of output voltage, need not use the simulation integrated chip, cost is low, the efficient height, the volume of circuit is little; Use two triodes to cooperate three-terminal voltage regulator to realize the output of oscillating voltage, the recycling inductance generates and the opposite polarity induced electromotive force of input voltage, realizes reducing the purpose of output voltage, and circuit structure is simple, stable performance.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory is called for short ROM) or stores memory body (Random Access Memory is called for short RAM) etc. at random.
Above disclosed only is the utility model preferred embodiment, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (10)
1. a reduction voltage circuit is characterized in that, comprising:
Filtration module is used for that input voltage is carried out filtering and handles back output;
Oscillation module is used for receiving described filtered voltage, forms oscillating voltage;
The module of inducting links to each other with described oscillation module, is used for receiving the oscillating voltage that described oscillation module produces, and generates corresponding induced electromotive force, when described induced electromotive force is opposite with described input voltage polarity, and the reduction output voltage.
2. circuit as claimed in claim 1 is characterized in that, described filtration module comprises first filter capacitor, and the positive pole of described filter capacitor connects voltage input end, minus earth.
3. circuit as claimed in claim 2, it is characterized in that, described oscillation module comprises first triode, second triode, three-terminal voltage regulator, diode, first divider resistance, second divider resistance, the 3rd divider resistance, the 4th divider resistance, the 5th divider resistance and first charging capacitor, the emitter of described first triode connects described voltage input end, collector electrode connects the anode of described three-terminal voltage regulator by the 5th divider resistance, base stage connects the collector electrode of described second triode, the base stage of described second triode connects the negative electrode of described three-terminal voltage regulator, emitter is by the described second divider resistance ground connection, the negative pole of described diode connects the collector electrode of described first triode, plus earth, described first divider resistance is connected between the emitter of the base stage of described first triode and described second triode, described the 3rd divider resistance is connected between the base stage of the base stage of described second triode and described first triode, the anode of the described three-terminal voltage regulator of described the 4th divider resistance one termination, other end ground connection, the control utmost point of described three-terminal voltage regulator connects the described module of inducting, the anode of described first charging capacitor connects the common node of described first divider resistance and described second divider resistance, minus earth.
4. circuit as claimed in claim 3, it is characterized in that, the described module of inducting comprises inductance, adjustable resistance and second charging capacitor, the collector electrode of described first triode of one termination of described inductance, another termination voltage output end, described adjustable resistance is connected between described voltage output end and the ground, described second charging capacitor is in parallel with described adjustable resistance, positive pole connects described voltage output end, minus earth, the common node of described second charging capacitor and described adjustable resistance connect the control utmost point of described three-terminal voltage regulator.
5. circuit as claimed in claim 4 is characterized in that, the described module of inducting also comprises the 6th divider resistance, and described the 6th divider resistance is connected between described adjustable resistance and the ground.
6. circuit as claimed in claim 5 is characterized in that, described circuit also comprises the 7th divider resistance, and described the 7th divider resistance is connected between the base stage and described first divider resistance of described first triode.
7. circuit as claimed in claim 6 is characterized in that, described circuit also comprises second filter capacitor, and the positive pole of described second filter capacitor connects described voltage output end, minus earth.
8. circuit as claimed in claim 7 is characterized in that, the model of described first triode is TIP115, and the model of described second triode is MPSA20.
9. circuit as claimed in claim 8 is characterized in that, the model of described three-terminal voltage regulator is TL431.
10. circuit as claimed in claim 9 is characterized in that, the model of described diode is IN5823.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320126992 CN203225657U (en) | 2013-03-19 | 2013-03-19 | A voltage-reducing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320126992 CN203225657U (en) | 2013-03-19 | 2013-03-19 | A voltage-reducing circuit |
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| CN203225657U true CN203225657U (en) | 2013-10-02 |
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| CN 201320126992 Expired - Fee Related CN203225657U (en) | 2013-03-19 | 2013-03-19 | A voltage-reducing circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541295A (en) * | 2018-10-16 | 2019-03-29 | 深圳壹账通智能科技有限公司 | The system and method for measuring mobile device power consumption |
| CN113190072A (en) * | 2021-03-30 | 2021-07-30 | 深圳市崧盛电子股份有限公司 | Negative voltage regulator |
-
2013
- 2013-03-19 CN CN 201320126992 patent/CN203225657U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541295A (en) * | 2018-10-16 | 2019-03-29 | 深圳壹账通智能科技有限公司 | The system and method for measuring mobile device power consumption |
| CN113190072A (en) * | 2021-03-30 | 2021-07-30 | 深圳市崧盛电子股份有限公司 | Negative voltage regulator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20190319 |
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| CF01 | Termination of patent right due to non-payment of annual fee |