CN205195540U - Switching mode voltage stabilizer convenient to heat dissipation - Google Patents
Switching mode voltage stabilizer convenient to heat dissipation Download PDFInfo
- Publication number
- CN205195540U CN205195540U CN201520892656.9U CN201520892656U CN205195540U CN 205195540 U CN205195540 U CN 205195540U CN 201520892656 U CN201520892656 U CN 201520892656U CN 205195540 U CN205195540 U CN 205195540U
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- type triode
- resistance
- pnp type
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- power supply
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Abstract
The utility model discloses a switching mode voltage stabilizer that dispels the heat of being convenient for, its casing backplate sets up the fin, the both sides plate -type becomes the installation folding, fixed mounting terminal box on the bottom plate, its functional module includes PNP type triode T1, T2, T3, diode D1 and stabilivolt D2, T1 projecting pole and T2 projecting pole connect the constant voltage power supply input jointly, the T1 collecting electrode is through resistance R1 ground connection, the T1 base is passed through resistance R3 and is connected with the T3 collecting electrode, the T2 base is connected with the T1 projecting pole, meet D1 between T2 collecting electrode and the ground, and the T2 collecting electrode meets stabilized power supply output end through inductance L1, set up establish ties the in proper order first branch road and by resistance R5 by resistance R4 and D2 between stabilized power supply output end and the ground, potentiometre rw and the resistance R6 second branch road of establishing ties in proper order, the T3 projecting pole connects between resistance R4 and D2 node, the T3 base is connected with the rw movable contact, connect behind resistance C1 and the series resistance between T1 base and T1 projecting pole, electric capacity C2 connects between stabilized power supply output end and ground. The utility model discloses can regulated output voltage.
Description
Technical field
The utility model relates to power circuit, particularly a kind of switching mode voltage stabilizer being convenient to dispel the heat.
Background technology
The switching mode voltage stabilizer being convenient to dispel the heat utilizes transistor at cut-off and the power circuit under saturated shape body and switch working state.The Correctional tube being convenient to the switching mode voltage stabilizer dispelled the heat is operated on off state, and it is interrupted by the electric current of Correctional tube, causes the stability of output voltage curve not ideal enough thus, is thus necessary to be improved.For the heat produced during stabilized voltage power supply operating state, prior art often uses fan to dispel the heat, shortcoming be price compared with high, noise is large.For the defect of prior art, be necessary to this be that the stabilized voltage power supply of core gives optimal design with three terminal regulator.
Utility model content
In view of this, the purpose of this utility model is that a kind of structure is simply convenient to the switching mode voltage stabilizer dispelled the heat, can regulated output voltage.
For solving the problems of the technologies described above, the utility model provides a kind of switching mode voltage stabilizer being convenient to dispel the heat, comprise housing and be installed on the functional module of enclosure interior by printed circuit board (PCB), the backboard of housing arranges fin to dispel the heat, the biside plate of housing forms installation folding, and the base plate of housing fixedly mounts terminal box, functional module comprises PNP type triode T1, PNP type triode T2, NPN type triode T3, diode D1 and voltage-stabiliser tube D2, the emitter of PNP type triode T1 and the emitter of PNP type triode T2 connect electric stabilized voltage power supply input jointly, the collector electrode of PNP type triode T1 is through resistance R1 ground connection, the base stage of PNP type triode T1 is connected with the collector electrode of NPN type triode T3 by resistance R3, the base stage of PNP type triode T2 is connected with the emitter of PNP type triode T1, the collector electrode of PNP type triode T2 and the indirect diode D1 on ground, and the collector electrode of PNP type triode T2 connects output end of stabilized voltage supply through inductance L 1, first branch road of being connected successively by resistance R4 and voltage-stabiliser tube D2 is set between output end of stabilized voltage supply with ground and by resistance R5, the second branch road that potentiometer Rw and resistance R6 connects successively, the emitter of NPN type triode T3 is connected between the node of resistance R4 and voltage-stabiliser tube D2, the base stage of NPN type triode T3 is connected with the moving contact of potentiometer Rw, be connected between the base stage of PNP type triode T1 and the emitter of PNP type triode T1 after resistance C1 and resistant series, electric capacity C2 is connected between output end of stabilized voltage supply and ground.
More preferably, PNP type triode T2 is the multiple tube be made up of two triodes.
Compared with prior art, the utility model devises the switching mode voltage stabilizer that a kind of circuit structure is simply convenient to dispel the heat, wherein PNP type triode T2 is switching tube, inductance L 1, electric capacity C2 and diode D1 forms accumulator, voltage-stabiliser tube D2, resistance R5, R4, potentiometer Rw, resistance R6 and NPN type triode T3 forms reference voltage, sample and compare amplifying circuit, by the conducting of control switch pipe with can output voltage be controlled deadline, and under the effect of accumulator, the direct voltage of continuous and stable is obtained at output, realize the object of stabilized output characteristic curve thus.In addition, the housing backboard of stabilized voltage power supply arranges fin, plays good radiating effect at lower cost, is conducive to the competitiveness improving product.
Accompanying drawing explanation
Fig. 1 is the body diagram that the utility model is convenient to the switching mode voltage stabilizer dispelled the heat;
Fig. 2 is the function module circuit figure that the utility model is convenient to the switching mode voltage stabilizer dispelled the heat.
Embodiment
In order to make those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
See Fig. 1, for the utility model is convenient to the body diagram of the switching mode voltage stabilizer (hereinafter referred to as stabilized voltage power supply) dispelled the heat.The functional module of this stabilized voltage power supply is installed on the inside of housing 101 by printed circuit board (PCB) (scheming not shown), housing 101 is formed (or obtaining so that plastic cement is one-body molded) with screw encapsulation by multi-sheets, wherein: the backboard of housing 101 arranges fin 103 and dispels the heat, and ensures great heat radiation effect at lower cost; The biside plate of housing 101 forms installation folding 102, and installation folding 102 offers bolt hole, wherein can wear butterfly bolt by housing 101 location and installation on pedestal (as wall, pedestal etc.); The panel of housing 101 can be arranged display screen 107 and action button 106, so that the operation conditions of operation and observation stabilized voltage power supply; The base plate of housing 101 fixedly mounts terminal box 105, this terminal box 105 arranges some binding posts 104, to access line.In the present embodiment, functional module wire laying mode on a printed circuit, the mounting structure of printed circuit board (PCB) in housing all can adopt known known technology, do not repeat them here.
See Fig. 2, for the utility model is convenient to the function module circuit figure of the switching mode voltage stabilizer dispelled the heat.This stabilized voltage power supply comprises PNP type triode T1, PNP type triode T2 (multiple tube be made up of two triodes), NPN type triode T3, diode D1 and voltage-stabiliser tube D2, concrete circuit structure is: the emitter of PNP type triode T1 and the emitter of PNP type triode T2 meet the switching mode voltage stabilizer input Ui (as 18V) that electricity is convenient to dispel the heat jointly, the collector electrode of PNP type triode T1 is through resistance R1 ground connection, the base stage of PNP type triode T1 is connected with the collector electrode of NPN type triode T3 by resistance R3, the base stage of PNP type triode T2 is connected with the emitter of PNP type triode T1, the collector electrode of PNP type triode T2 and the indirect diode D1 on ground, and the collector electrode of PNP type triode T2 meets the switching mode voltage stabilizer output Uo of being convenient to dispel the heat through inductance L 1, be convenient to the switching mode voltage stabilizer output that dispels the heat and first branch road of being connected successively by resistance R4 and voltage-stabiliser tube D2 is set between ground and by resistance R5, the second branch road that potentiometer Rw and resistance R6 connects successively, the emitter of NPN type triode T3 is connected between the node of resistance R4 and voltage-stabiliser tube D2, the base stage of NPN type triode T3 is connected with the moving contact of potentiometer Rw, resistance C1 and resistance R2 is connected between the base stage of PNP type triode T1 and the emitter of PNP type triode T1 after connecting, electric capacity C2 be connected to be convenient to dispel the heat switching mode voltage stabilizer output and ground between.
This is convenient in the switching mode voltage stabilizer dispelled the heat, when the base stage of PNP type triode T2 inputs negative pulse, it is for saturation conduction state, its current collection very 18V, diode D1 is in reverse-biased and ends, the linear rising of electric current of inductance L 1, charges to electric capacity C2, power to the load, now inductance L 1 also stores certain energy simultaneously.End when the base stage input positive pulse of PNP type triode T2, the electric current in inductance L 1 can not suddenly change, and will induce left negative right positive voltage.The negative terminal of this induced voltage is added to diode D1, makes diode D1 conducting, and such inductance L 1, electric capacity C2 and diode D1 form conducting loop, and inductance L 1 starts to release energy, and its electric current linearly declines.
When the switching mode voltage stabilizer being convenient to dispel the heat is connected, resistance R1 can regard the biasing resistor of PNP type triode T2 as, input voltage makes PNP type triode T2 conducting through resistance R1, the lifting of PNP type triode T1 base potential is made by resistance R2 electric capacity C1, PNP type triode T1 collector potential declines, cause the base potential of PNP type triode T2 to decline further, impel PNP type triode T2 conducting more.This positive feedback process will make PNP type triode T2 enter saturation conduction very soon, and PNP type triode T1 ends.PNP type triode T1 cut-off as in the previous, PNP type triode T2 conducting, then now electric capacity C1 is filled with voltage, now electric capacity C1 discharges, and discharge loop is that the ON time of resistance-C2-L1, PNP type triode T2 between C1-R2--R3-T3c-e depends on electric capacity C1 discharge time.Discharge into a certain degree, PNP type triode T1 conducting and be in magnifying state, and PNP type triode T2 is in cut-off state.After this electric capacity C1 charges, and input voltage is by the emitter junction-C1-R2-L1-C2 of T1, and the charging interval depends on the deadline with PNP type triode T2.As can be seen here, control and the conducting of PNP type triode T2 and deadline, just can reach and control output voltage, the stable object exporting output characteristic curve.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; can make possible variation and amendment, the scope that therefore protection range of the present utility model should define with the utility model claim is as the criterion.
Claims (2)
1. be convenient to the switching mode voltage stabilizer of heat radiation for one kind, comprise housing and be installed on the functional module of enclosure interior by printed circuit board (PCB), it is characterized in that, the backboard of housing arranges fin to dispel the heat, the biside plate of housing forms installation folding, and the base plate of housing fixedly mounts terminal box, functional module comprises PNP type triode T1, PNP type triode T2, NPN type triode T3, diode D1 and voltage-stabiliser tube D2, the emitter of PNP type triode T1 and the emitter of PNP type triode T2 connect electric stabilized voltage power supply input jointly, the collector electrode of PNP type triode T1 is through resistance R1 ground connection, the base stage of PNP type triode T1 is connected with the collector electrode of NPN type triode T3 by resistance R3, the base stage of PNP type triode T2 is connected with the emitter of PNP type triode T1, the collector electrode of PNP type triode T2 and the indirect diode D1 on ground, and the collector electrode of PNP type triode T2 connects output end of stabilized voltage supply through inductance L 1, first branch road of being connected successively by resistance R4 and voltage-stabiliser tube D2 is set between output end of stabilized voltage supply with ground and by resistance R5, the second branch road that potentiometer Rw and resistance R6 connects successively, the emitter of NPN type triode T3 is connected between the node of resistance R4 and voltage-stabiliser tube D2, the base stage of NPN type triode T3 is connected with the moving contact of potentiometer Rw, be connected between the base stage of PNP type triode T1 and the emitter of PNP type triode T1 after resistance C1 and resistant series, electric capacity C2 is connected between output end of stabilized voltage supply and ground.
2. stabilized voltage power supply as claimed in claim 1, it is characterized in that, PNP type triode T2 is the multiple tube be made up of two triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520892656.9U CN205195540U (en) | 2015-11-10 | 2015-11-10 | Switching mode voltage stabilizer convenient to heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520892656.9U CN205195540U (en) | 2015-11-10 | 2015-11-10 | Switching mode voltage stabilizer convenient to heat dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195540U true CN205195540U (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520892656.9U Expired - Fee Related CN205195540U (en) | 2015-11-10 | 2015-11-10 | Switching mode voltage stabilizer convenient to heat dissipation |
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| Country | Link |
|---|---|
| CN (1) | CN205195540U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452071A (en) * | 2016-11-22 | 2017-02-22 | 郑州诚合信息技术有限公司 | Power control circuit in wide frequency scale |
-
2015
- 2015-11-10 CN CN201520892656.9U patent/CN205195540U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452071A (en) * | 2016-11-22 | 2017-02-22 | 郑州诚合信息技术有限公司 | Power control circuit in wide frequency scale |
| CN106452071B (en) * | 2016-11-22 | 2019-03-22 | 惠州市沃生照明有限公司 | A kind of power control circuit of wide frequency ranges |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160427 Termination date: 20161110 |