CN205039703U - Intelligence step -down formula switching power supply - Google Patents
Intelligence step -down formula switching power supply Download PDFInfo
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- CN205039703U CN205039703U CN201520847237.3U CN201520847237U CN205039703U CN 205039703 U CN205039703 U CN 205039703U CN 201520847237 U CN201520847237 U CN 201520847237U CN 205039703 U CN205039703 U CN 205039703U
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Abstract
The utility model discloses an intelligence step -down formula switching power supply, including resistance R1, inductance L1, electric capacity C1, diode D1, three terminal regulator U1, triode VT1 and diode D1, the resistance R1 one end VCC that connects, electric capacity C1 is connected respectively to the resistance R1 other end, triode VT1 projecting pole, diode D1 negative pole and MOS pipe Q1's the S utmost point, diode D1 positive pole is connected respectively to MOS pipe Q1's the G utmost point, triode VT1 collecting electrode and resistance R2, electric capacity C2 is connected respectively to MOS pipe Q1's the D utmost point, diode D2 negative pole and inductance L1, triode VT1 base is connected respectively to the electric capacity C2 other end, electric capacity C5 and resistance R3, the electric capacity C5 other end and triode VT2 collecting electrode are connected respectively to the resistance R3 other end. The utility model discloses intelligence step -down formula switching power supply adopts triode and MOS pipe cooperation control, and circuit structure is simple, and is with low costs, small, especially adapted using widely.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, specifically a kind of intelligent step down switching regulator.
Background technology
Switching Power Supply is described as energy-efficient power supply, it is the more satisfactory product under modern promotion environmental protection, it represents the developing direction of stabilized voltage power supply, now become the main product of stabilized voltage power supply, the inner key components of Switching Power Supply is operated in HF switch state, consumed energy own is very low, and power-efficient can reach 70% ~ 90%, improves nearly one times than normal linear stabilized voltage power supply.Switching Power Supply is also known as the power supply of no industrial frequency transformer, it be utilize the very little high frequency transformer of volume to realize voltage transformation and electrical network isolation, heavy Industrial Frequency Transformer can not only be removed, also can adopt filter element and the radiator of small volume, little, the lightweight Switching Power Supply of research and development high efficiency, high density, high reliability, volume becomes the direction of people's research.
Utility model content
The purpose of this utility model is to provide a kind of intelligent step down switching regulator, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of intelligent step down switching regulator, comprises resistance R1, inductance L 1, electric capacity C1, diode D1, three terminal regulator U1, triode VT1 and diode D1, described resistance R1 one end connects power supply VCC, the resistance R1 other end connects electric capacity C1 respectively, triode VT1 emitter, the S pole of diode D1 negative pole and metal-oxide-semiconductor Q1, the G pole of metal-oxide-semiconductor Q1 connects diode D1 positive pole respectively, triode VT1 collector electrode and resistance R2, the D pole of metal-oxide-semiconductor Q1 connects electric capacity C2 respectively, diode D2 negative pole and inductance L 1, the electric capacity C2 other end is connecting triode VT1 base stage respectively, electric capacity C5 and resistance R3, the resistance R3 other end connects the electric capacity C5 other end and triode VT2 collector electrode respectively, and triode VT2 emitter connects the electric capacity C1 other end respectively, the resistance R2 other end, diode D2 positive pole, resistance R4, resistance R6, electric capacity C3, three terminal regulator U1 earth terminal and electric capacity C4 ground connection, the triode VT2 base stage respectively contact resistance R6 other end and resistance R5, the resistance R5 other end connects inductance L 1 other end respectively, the resistance R4 other end, the input of the electric capacity C3 other end and three terminal regulator U1, the output of three terminal regulator U1 connects output end vo and the electric capacity C4 other end respectively.
As further program of the utility model: described three terminal regulator U1 adopts 7805.
As further program of the utility model: described diode D1 is voltage stabilizing didoe.
As the utility model further scheme: described power supply VCC voltage is 12V.
Compared with prior art, the beneficial effects of the utility model are: the utility model intelligence step down switching regulator adopts triode and metal-oxide-semiconductor to coordinate and controls, and circuit structure is simple, and cost is low, and volume is little, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of intelligent step down switching regulator.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of intelligent step down switching regulator, comprises resistance R1, inductance L 1, electric capacity C1, diode D1, three terminal regulator U1, triode VT1 and diode D1, resistance R1 one end connects power supply VCC, the resistance R1 other end connects electric capacity C1 respectively, triode VT1 emitter, the S pole of diode D1 negative pole and metal-oxide-semiconductor Q1, the G pole of metal-oxide-semiconductor Q1 connects diode D1 positive pole respectively, triode VT1 collector electrode and resistance R2, the D pole of metal-oxide-semiconductor Q1 connects electric capacity C2 respectively, diode D2 negative pole and inductance L 1, the electric capacity C2 other end is connecting triode VT1 base stage respectively, electric capacity C5 and resistance R3, the resistance R3 other end connects the electric capacity C5 other end and triode VT2 collector electrode respectively, and triode VT2 emitter connects the electric capacity C1 other end respectively, the resistance R2 other end, diode D2 positive pole, resistance R4, resistance R6, electric capacity C3, three terminal regulator U1 earth terminal and electric capacity C4 ground connection, the triode VT2 base stage respectively contact resistance R6 other end and resistance R5, the resistance R5 other end connects inductance L 1 other end respectively, the resistance R4 other end, the input of the electric capacity C3 other end and three terminal regulator U1, the output of three terminal regulator U1 connects output end vo and the electric capacity C4 other end respectively.
Three terminal regulator U1 adopts 7805.
Diode D1 is voltage stabilizing didoe.
Power supply VCC voltage is 12V.
Operation principle of the present utility model is: refer to Fig. 1, the moment of circuit start, power supply is supplied to the enough large G electrode current of Q1 by R2, Q1 saturation conduction, Q1 can use the metal-oxide-semiconductor of P type, its D electrode current part is supplied to output end vo by L1 to C3 charging, a part is stored in L1, when the voltage at C3 two ends is more than VT2 conducting during 15V, VT1 also conducting causes the G electrode potential of Q1 to rise, electric current reduces, the current potential of the upper end of C2 declines, because the voltage at C2 two ends can not suddenly change, the current potential of VT1 base stage declines rapidly, the base potential of Q1 rises rapidly and knows quick shutoff, the energy storage that Q1 closes the L1 that has no progeny discharges to C3 and output end vo by sustained diode 2, then the circulation of next cycle is started.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (4)
1. an intelligent step down switching regulator, comprises resistance R1, inductance L 1, electric capacity C1, diode D1, three terminal regulator U1, triode VT1 and diode D1, is characterized in that, described resistance R1 one end connects power supply VCC, the resistance R1 other end connects electric capacity C1 respectively, triode VT1 emitter, the S pole of diode D1 negative pole and metal-oxide-semiconductor Q1, the G pole of metal-oxide-semiconductor Q1 connects diode D1 positive pole respectively, triode VT1 collector electrode and resistance R2, the D pole of metal-oxide-semiconductor Q1 connects electric capacity C2 respectively, diode D2 negative pole and inductance L 1, the electric capacity C2 other end is connecting triode VT1 base stage respectively, electric capacity C5 and resistance R3, the resistance R3 other end connects the electric capacity C5 other end and triode VT2 collector electrode respectively, and triode VT2 emitter connects the electric capacity C1 other end respectively, the resistance R2 other end, diode D2 positive pole, resistance R4, resistance R6, electric capacity C3, three terminal regulator U1 earth terminal and electric capacity C4 ground connection, the triode VT2 base stage respectively contact resistance R6 other end and resistance R5, the resistance R5 other end connects inductance L 1 other end respectively, the resistance R4 other end, the input of the electric capacity C3 other end and three terminal regulator U1, the output of three terminal regulator U1 connects output end vo and the electric capacity C4 other end respectively.
2. intelligent step down switching regulator according to claim 1, is characterized in that, described three terminal regulator U1 adopts 7805.
3. intelligent step down switching regulator according to claim 1, is characterized in that, described diode D1 is voltage stabilizing didoe.
4. intelligent step down switching regulator according to claim 1, is characterized in that, described power supply VCC voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520847237.3U CN205039703U (en) | 2015-10-29 | 2015-10-29 | Intelligence step -down formula switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520847237.3U CN205039703U (en) | 2015-10-29 | 2015-10-29 | Intelligence step -down formula switching power supply |
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| Publication Number | Publication Date |
|---|---|
| CN205039703U true CN205039703U (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520847237.3U Expired - Fee Related CN205039703U (en) | 2015-10-29 | 2015-10-29 | Intelligence step -down formula switching power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452072A (en) * | 2016-11-24 | 2017-02-22 | 郑州艾莫弗信息技术有限公司 | Voltage-stabilizing control circuit of direct-current power supply |
| CN111722050A (en) * | 2020-08-10 | 2020-09-29 | 西安外事学院 | Detection apparatus for electrical automation equipment |
-
2015
- 2015-10-29 CN CN201520847237.3U patent/CN205039703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452072A (en) * | 2016-11-24 | 2017-02-22 | 郑州艾莫弗信息技术有限公司 | Voltage-stabilizing control circuit of direct-current power supply |
| CN111722050A (en) * | 2020-08-10 | 2020-09-29 | 西安外事学院 | Detection apparatus for electrical automation equipment |
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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 |
Granted publication date: 20160217 Termination date: 20161029 |
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| CF01 | Termination of patent right due to non-payment of annual fee |