CN202306373U - Direct current voltage-reducing and voltage-stabilizing circuit - Google Patents
Direct current voltage-reducing and voltage-stabilizing circuit Download PDFInfo
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- CN202306373U CN202306373U CN2011203539203U CN201120353920U CN202306373U CN 202306373 U CN202306373 U CN 202306373U CN 2011203539203 U CN2011203539203 U CN 2011203539203U CN 201120353920 U CN201120353920 U CN 201120353920U CN 202306373 U CN202306373 U CN 202306373U
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Abstract
The embodiment of the utility model discloses a direct current voltage-reducing and voltage-stabilizing circuit. The direct current voltage-reducing and voltage-stabilizing circuit comprises a direct current input end, a direct current output end and a triode, wherein a collector of the triode is connected with the direct current input end, an emitter of the triode is connected with the direct current output end, and a base of the triode is grounded through a voltage-stabilizing tube; and a first resistor is bridged between the collector and the base of the triode, and is connected with the voltage-stabilizing tube in series. According to the embodiment of the utility model, the direct current voltage-reducing and the voltage-stabilizing circuit can realize a voltage-reducing and voltage-stabilizing function, and has the advantages of simple circuit structure, low production cost and the like.
Description
Technical field
The utility model relates to the electrical and electronic technology field, relates in particular to a kind of DC decompression mu balanced circuit.
Background technology
Along with making rapid progress of electronic product, various electronic products are also increasingly high to the requirement of direct supply, and low input dc power presses to main flow, and therefore, DC voltage step-down conversion is essential.
DC decompression voltage stabilizing scheme is very many, and main flow is LDO (low pressure difference linear voltage regulator) and these two kinds of lowering and stabilizing blood pressure schemes of DC/DC (DC-to-dc converter) at present.But most LDO and DC/DC step-down scenario-frame are very complicated.Shown in Figure 1 is the internal circuit configuration synoptic diagram of existing LDO, and it not only can realize step-down and voltage stabilizing, and has functions such as linear voltage stabilization and limit control at zero point, and its application is very extensive, and function is very powerful.And, only need simple lowering and stabilizing blood pressure function to get final product in some application scenarios, and if still just certainly will cause unnecessary waste wherein, and can cause very high cost with such circuit, make the production cost of electronic product be difficult to be effectively controlled.
The utility model content
The utility model embodiment technical matters to be solved is, a kind of DC decompression mu balanced circuit is provided, and can simplify circuit structure, effectively reduces production costs.
In order to solve the problems of the technologies described above; The utility model embodiment provides a kind of DC decompression mu balanced circuit; It comprises direct-flow input end, dc output end and a triode, and the collector of said triode is connected with said direct-flow input end; Emitter is connected with said dc output end, and base stage is through a stabilivolt ground connection; Between the collector of said triode and base stage, also be provided with first resistance, the one of which end is connected with said collector, and the other end is connected with said base stage, and said first resistance is connected with said stabilivolt.
Wherein, between the emitter of said dc output end and said triode, also be provided with filtering circuit.
Wherein, in the said filtering circuit, comprise an electrochemical capacitor at least, its positive pole is connected minus earth with said dc output end.
Wherein, said filtering circuit also comprises first electric capacity, the parallelly connected setting with said electrochemical capacitor of said first electric capacity.
Wherein, the two ends parallel connection of said stabilivolt is provided with second electric capacity.
Wherein, said DC decompression mu balanced circuit also comprises the control circuit that is used to control its break-make, and said control circuit comprises a switching tube; Said switching tube comprises an input end, an output terminal and a control end, and said input end is connected with the base stage of said triode; Said output head grounding, said control end is used for input control signal, when said control signal is high level; Said input end and output terminal conducting, when said control signal was low level, said input end and output terminal broke off.
Wherein, said switching tube is triode or controllable silicon.
Wherein, be provided with second resistance between said control end and the said output terminal, the one of which end is connected with said control end, and the other end is connected with said output terminal.
Wherein, said control end also consecutive be connected to the 3rd resistance.
Implement the utility model embodiment, have following beneficial effect:
The utility model embodiment adopts triode as voltage drop element, and cooperates stabilivolt, makes the voltage of triode output keep stable.When load power consumption changes; The electric current that changes can be synchronized to the base stage of triode and the electric current on the stabilivolt; Because triode is operated in the amplification region; So the current change quantity that the load power consumption variation is produced can make the voltage of output keep constant, realization step-down and voltage regulation result after triode is regulated.Each element of the utility model all adopts general electronic devices and components, so production cost is very low.
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; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the internal circuit configuration synoptic diagram of LDO in the prior art.
Fig. 2 is a DC decompression mu balanced circuit structural representation among the utility model embodiment.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, 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 is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of DC decompression mu balanced circuit, more particularly, is a kind of dc-dc boost mu balanced circuit of low pressure drop, is mainly used in the DC voltage conversion of low pressure, and the output low-voltage DC is so that be power electronic equipment.
See also shown in Figure 2; The DC decompression mu balanced circuit 1000 of present embodiment comprises the direct-flow input end IN that is used to import high voltage direct current; Be used to export dc output end OUT and a triode 100 of low-voltage DC, wherein, 100 collectors 2 of triode are connected with direct-flow input end IN; Emitter 3 is connected with dc output end OUT, and 1 of base stage is passed through a stabilivolt 200 back ground connection.Cross-over connection has first resistance 300 between the collector 2 of triode 100 and base stage 1, that is, the one of which end is connected with collector 2, and the other end is connected with base stage 1, and this first resistance 300 forms series relationship with stabilivolt 200.
High voltage direct current through first resistance, 300 dividing potential drops after, flow into the base stage 1 of triode 100 ground connection afterwards because base stage 1 is connected with stabilivolt 200, therefore, the current potential of base stage 1 by stabilivolt 200 clampers in a fixed value.Base stage 1 keeps high level, triode 100 conductings, and high voltage direct current is through the dc output end OUT output of triode 100.For the DC decompression mu balanced circuit 1000 that makes present embodiment can be realized antihypertensive effect; Must make triode 100 be operated in the amplification region; And this is easy to realize; Only need select the sizeable stabilivolt of burning voltage for use, the current potential of base stage 1 remained on triode 100 is operated in the scope of amplification region.
The DC decompression mu balanced circuit 1000 of present embodiment also has voltage stabilizing function preferably, and this function is achieved in that
Between the emitter 3 of dc output end OUT and triode 100, filtering circuit is set, this filtering circuit comprises an electrochemical capacitor 400 at least, and the positive pole of this electrochemical capacitor 400 is connected minus earth with dc output end OUT.As everyone knows, desirable electric capacity can not suddenly change at the transient voltage of connecting, thereby power attenuation can not take place, phenomenon that yet just can the emergent power vibration in the circuit.But in fact, because make the material of electric capacity resistance is arranged, the insulating medium of electric capacity is lossy, and a variety of causes causes electric capacity become not " ideal ".This loss externally shows as just as a resistance and follows capacitances in series together, and power all consumes on this resistance, and this resistance is called ESR (equivalent series resistance).Less ESR can make circuit can not produce self-sustained oscillation in the moment of connecting, and has good filtering voltage regulation effect.Therefore, generally, for electric capacity, ESR is more little good more, and electrochemical capacitor is the smaller electric capacity of ESR commonly used at present.Present embodiment also can be set up one first electric capacity 500 in order to strengthen filter effect, makes this first electric capacity 500 and electrochemical capacitor 400 parallelly connected settings, and this first electric capacity 500 can be electrochemical capacitor or ceramic disc capacitor etc.
Simultaneously, present embodiment at the two ends of stabilivolt 200 also parallel connection be provided with second electric capacity 600, this second electric capacity 600 can play the effect of buffering.Direct-flow input end IN connects moment, and second electric capacity 600 gets into charged state, and the voltage of triode 100 base stages progressively raises, and after 600 chargings of second electric capacity were accomplished, the current potential of base stage 1 reached the highest, just the stable voltage of stabilivolt 200.So second electric capacity 600 becomes a buffer capacitor, make dc output end OUT place can not produce vibration, thereby reach voltage regulation result because of current break.
Now, a lot of electronic equipments all have idle function, and when electronic equipment standby or shutdown, main feed circuit are cut off.Therefore, the DC decompression mu balanced circuit 1000 of the utility model embodiment also can be provided with the control circuit that is used to control its break-make, with standby or the shutdown of controlling electronic equipment easily during as main feed circuit.This control circuit comprises a switching tube, and the switching tube of present embodiment can be selected components and parts such as triode, controllable silicon for use.Below specify its circuit structure and principle of work.
Switching tube comprises an input end, an output terminal and a control end.For triode, input end is a collector, and output terminal is an emitter, and control end is a base stage; For controllable silicon, input end is an anode, and output terminal is a negative electrode, and control end is the control utmost point.Present embodiment adopts triode 700 as switching tube, with stabilivolt 200 parallelly connected settings, particularly; Its collector 5 is connected with the base stage 1 of triode 100, emitter 6 ground connection, and base stage 4 is used to import outside control signal; When control signal is high level; Input end and output terminal conducting, when control signal was low level, input end and output terminal turn-offed.
When control signal was low level, triode 700 ended, and the base stage 1 of triode 100 is in noble potential, is conducting state, the utility model DC decompression mu balanced circuit 1000 operate as normal.When control signal becomes high level, triode 700 conductings, the base stage 1 of triode 100 is pulled to low level, and triode 100 ends, and the utility model DC decompression mu balanced circuit 1000 quits work, thereby realizes standby or shutdown function.
When preventing that control signal is unstable; When control signal is low level with triode 700 conductings; Present embodiment one second resistance 800 of on 700 control end, connecting, simultaneously, one the 3rd resistance 900 of cross-over connection between this base stage 4 and emitter 6; Be that the one of which end is connected with base stage 4, the other end is connected with emitter 6.Above-mentioned second resistance 800 is mainly used in dividing potential drop, and the 3rd resistance 900 is used for excessive electric current is introduced earth terminal, as bleed-off circuit, makes the base stage 4 of triode 700 keep low level, keeps the cut-off state of triode 700.
The DC decompression mu balanced circuit 1000 of supposing need to adopt the utility model embodiment converts the direct supply of 24V the direct current output of 4.3V into, below comprehensive foregoing circuit structure, it at length is described realizes principle.
The 24V direct supply is connected to direct-flow input end IN, after first resistance, 300 dividing potential drops, is loaded into the two ends of stabilivolt 200, makes the current potential of base stage 1 on the triode 100 be fixed on the stable voltage of stabilivolt 200.In order to obtain the low-voltage DC of 4.3V; The voltage of base stage 1 should be the BE knot pressure drop that the voltage at dc output end OUT place adds triode 100, i.e. 4.3+0.7=5V, wherein; 0.7V be the BE knot pressure drop (the BE knot pressure drop of germanium tube is about 0.3V) of silicone tube; Therefore, should select stable voltage for use is the stabilivolt DV07 of 5V, and the resistance of first resistance 300 only need be chosen as and guarantee that its power consumption gets final product less than its rated power.
Quit work when needs make the DC decompression mu balanced circuit 1000 of the utility model embodiment, when making electronic equipment standby or shutdown, can high-level control signal be input to control end.Present embodiment can adopt following mode to realize: control end is connected on the universaling I/O port of certain chip of electronic equipment; Output a control signal to control end through this chip; Make triode 700 conductings, thereby the base stage 1 of triode 100 is pulled to low level, triode 100 is ended; Thereby the utility model DC decompression mu balanced circuit 1000 is cut off, electronic equipment is quit work.
In sum, the DC decompression mu balanced circuit 1000 of the utility model embodiment adopts triode and stabilivolt etc. to connect and compose; Make entire circuit simple in structure; With low cost, can realize equally the function of step-down and voltage stabilizing making the production cost of electronic equipment be effectively controlled.
Above disclosedly be merely a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, the equivalent variations of therefore being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (9)
1. DC decompression mu balanced circuit; It is characterized in that: comprise direct-flow input end, dc output end and a triode, the collector of said triode is connected with said direct-flow input end; Emitter is connected with said dc output end, and base stage is through a stabilivolt ground connection; Between the collector of said triode and base stage, also be provided with first resistance, the one of which end is connected with said collector, and the other end is connected with said base stage, and said first resistance is connected with said stabilivolt.
2. DC decompression mu balanced circuit as claimed in claim 1 is characterized in that: between the emitter of said dc output end and said triode, also be provided with filtering circuit.
3. DC decompression mu balanced circuit as claimed in claim 2 is characterized in that: in the said filtering circuit, comprise an electrochemical capacitor at least, its positive pole is connected minus earth with said dc output end.
4. DC decompression mu balanced circuit as claimed in claim 3 is characterized in that: said filtering circuit also comprises first electric capacity, the parallelly connected setting with said electrochemical capacitor of said first electric capacity.
5. DC decompression mu balanced circuit as claimed in claim 1 is characterized in that: the two ends parallel connection of said stabilivolt is provided with second electric capacity.
6. like the DC decompression mu balanced circuit of claim 1 ~ 5 described in each, it is characterized in that: said DC decompression mu balanced circuit also comprises the control circuit that is used to control its break-make, and said control circuit comprises a switching tube; Said switching tube comprises an input end, an output terminal and a control end, and said input end is connected with the base stage of said triode; Said output head grounding; Said control end is used for input control signal, when said control signal is high level, and said input end and output terminal conducting; When said control signal was low level, said input end and output terminal broke off.
7. DC decompression mu balanced circuit as claimed in claim 6 is characterized in that: said switching tube is triode or controllable silicon.
8. DC decompression mu balanced circuit as claimed in claim 6 is characterized in that: be provided with second resistance between said control end and the said output terminal, the one of which end is connected with said control end, and the other end is connected with said output terminal.
9. DC decompression mu balanced circuit as claimed in claim 6 is characterized in that: said control end also is serially connected with the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203539203U CN202306373U (en) | 2011-09-21 | 2011-09-21 | Direct current voltage-reducing and voltage-stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203539203U CN202306373U (en) | 2011-09-21 | 2011-09-21 | Direct current voltage-reducing and voltage-stabilizing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202306373U true CN202306373U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203539203U Expired - Fee Related CN202306373U (en) | 2011-09-21 | 2011-09-21 | Direct current voltage-reducing and voltage-stabilizing circuit |
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| CN (1) | CN202306373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526267A (en) * | 2016-12-21 | 2017-03-22 | 武汉阿迪克电子股份有限公司 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
| CN109410868A (en) * | 2018-12-06 | 2019-03-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel drive device |
-
2011
- 2011-09-21 CN CN2011203539203U patent/CN202306373U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526267A (en) * | 2016-12-21 | 2017-03-22 | 武汉阿迪克电子股份有限公司 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
| CN109410868A (en) * | 2018-12-06 | 2019-03-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel drive device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SKY-WORTH DIGITAL TECHNOLOGY CO., LTD.;SHENZHEN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee after: Shenzhen Skyworth Digital Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee before: Shenzhen Skyworth Digital Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20170921 |