CN204856368U - Singlechip supply circuit - Google Patents
Singlechip supply circuit Download PDFInfo
- Publication number
- CN204856368U CN204856368U CN201520354322.6U CN201520354322U CN204856368U CN 204856368 U CN204856368 U CN 204856368U CN 201520354322 U CN201520354322 U CN 201520354322U CN 204856368 U CN204856368 U CN 204856368U
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- electric capacity
- rectifier bridge
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- transformer
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Abstract
The utility model discloses a singlechip supply circuit, including rectifier bridge T, transformer W, electric capacity C1 and resistance R1, the both ends of 220V alternating current are connected respectively at transformer W's winding N1's both ends, and rectifier bridge T's port 1 and rectifier bridge T's port 3 are connected respectively to transformer W's winding N2's both ends, and electric capacity C1, electric capacity C3, diode D1's negative pole and chip IC1's pin 1 are connected to rectifier bridge T's port 2. The utility model discloses singlechip supply circuit has ensured the stability behind the voltage input through setting up threshold voltage, has avoided commercial power voltage fluctuation to cause the unstable phenomenon of output voltage, has improved the last electric reliability of singlechip, and circuit structure is simple simultaneously, components and parts are few, and the cost of manufacture is low.
Description
Technical field
The utility model relates to a kind of feed circuit, specifically a kind of single-chip microcomputer feed circuit.
Background technology
Single-chip microcomputer is the modal control chip of electronic industry, and it has with low cost, stable performance, the compatible plurality of advantages such as good, is therefore widely used.The power supply of single-chip microcomputer, generally selects switch power module and designed, designed power supply.But due to the instability of line voltage and the fluctuation of voltage, cause single-chip microcomputer reliability in the process of electrification reset to decrease, and then cause its properties of product to decline to some extent.
Summary of the invention
The purpose of this utility model is to provide a kind of single-chip microcomputer feed circuit, 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 single-chip microcomputer feed circuit, comprise rectifier bridge T, transformer W, electric capacity C1 and resistance R1, the two ends of the winding N1 of described transformer W connect the two ends of 220V alternating current respectively, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects electric capacity C1, electric capacity C3, the negative electrode of diode D1 and the pin 1 of chip IC 1, the port 4 of rectifier bridge T connects the other end of electric capacity C1, electric capacity C2, resistance R2, the anode of diode D2, the emitter of triode Q1 and the pin 3 of chip IC 1, the anode contact resistance R1 of diode D1, the other end of other end contact resistance R2 of resistance R1 and the base stage of triode Q1, the other end contact resistance R3 of electric capacity C3 and the pin 5 of chip IC 1, the collector of the other end connecting triode Q1 of resistance R3, the pin 2 of chip IC 1 connects the negative electrode of inductance L 1 and diode D2, the other end of inductance L 1 connects the other end of electric capacity C2, the pin 4 of chip IC 1 and single-chip microcomputer.
As preferred version of the present utility model: the model of described chip IC 1 is LM7525.
Compared with prior art, the beneficial effects of the utility model are: the utility model single-chip microcomputer feed circuit are by arranging threshold voltage, ensure that the stability after voltage input, avoid the phenomenon that mains fluctuation causes output voltage instability, improve the reliability that powers on of single-chip microcomputer, circuit structure is simple simultaneously, components and parts are few, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of single-chip microcomputer feed circuit.
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, a kind of single-chip microcomputer feed circuit, comprise rectifier bridge T, transformer W, electric capacity C1 and resistance R1, the two ends of the winding N1 of described transformer W connect the two ends of 220V alternating current respectively, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects electric capacity C1, electric capacity C3, the negative electrode of diode D1 and the pin 1 of chip IC 1, the port 4 of rectifier bridge T connects the other end of electric capacity C1, electric capacity C2, resistance R2, the anode of diode D2, the emitter of triode Q1 and the pin 3 of chip IC 1, the anode contact resistance R1 of diode D1, the other end of other end contact resistance R2 of resistance R1 and the base stage of triode Q1, the other end contact resistance R3 of electric capacity C3 and the pin 5 of chip IC 1, the collector of the other end connecting triode Q1 of resistance R3, the pin 2 of chip IC 1 connects the negative electrode of inductance L 1 and diode D2, the other end of inductance L 1 connects the other end of electric capacity C2, the pin 4 of chip IC 1 and single-chip microcomputer.
The model of chip IC 1 is LM7525.
Principle of work of the present utility model is: circuit comprises reduction voltage circuit, rectification circuit, filtering circuit and mu balanced circuit, and described reduction voltage circuit is made up of transformer W; Described rectification circuit is made up of rectifier bridge T; Described filtered electrical routing capacitance C1 and C2 forms; Described mu balanced circuit is made up of switch voltage-stabilizing integrated circuit (IC) 1.Described single-chip microcomputer feed circuit include voltage threshold circuit and delay circuit; Voltage threshold circuit is made up of diode D1 and resistance R1, R2; Delay circuit is made up of polypropylene capactive C3 and resistance R3, in work, after line voltage input, after transformer W step-down, rectifier bridge T rectification and an electric capacity C1 filtering, carry out the detection of voltage threshold by voltage threshold circuit, guarantee that its voltage can reach on voltage stabilizing diode D2 burning voltage 12V.The function of after this delay circuit time delay 10 milliseconds of starting switch integrated regulator IC1, thus realize the Spline smoothing of electric power output voltage 0 to 5V.Through the voltage of voltage stabilizing after C2 secondary filtering, can for single-chip microcomputer.Threshold circuit is set in circuit, threshold detection can be carried out for input voltage, guarantee that input voltage can arrive voltage stabilizing diode setting voltage, ensure that the stability after voltage input simultaneously, avoid the voltage fluctuation of line voltage and the unstable phenomenon of the electric power output voltage that causes, improve the reliability of single-chip microcomputer electrification reset.Delay circuit is set in circuit, the function of starting switch integrated regulator LM2575 after circuit delay 10 milliseconds can be made, realize the Spline smoothing of electric power output voltage 0 to 5V, simultaneously by avoiding the voltage fluctuation time thus avoiding the instability that voltage fluctuation formed, guarantee the complete success of single-chip microcomputer electrification reset process.
Claims (2)
1. single-chip microcomputer feed circuit, comprise rectifier bridge T, transformer W, electric capacity C1 and resistance R1, it is characterized in that, the two ends of the winding N1 of described transformer W connect the two ends of 220V alternating current respectively, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects electric capacity C1, electric capacity C3, the negative electrode of diode D1 and the pin 1 of chip IC 1, the port 4 of rectifier bridge T connects the other end of electric capacity C1, electric capacity C2, resistance R2, the anode of diode D2, the emitter of triode Q1 and the pin 3 of chip IC 1, the anode contact resistance R1 of diode D1, the other end of other end contact resistance R2 of resistance R1 and the base stage of triode Q1, the other end contact resistance R3 of electric capacity C3 and the pin 5 of chip IC 1, the collector of the other end connecting triode Q1 of resistance R3, the pin 2 of chip IC 1 connects the negative electrode of inductance L 1 and diode D2, the other end of inductance L 1 connects the other end of electric capacity C2, the pin 4 of chip IC 1 and single-chip microcomputer.
2. a kind of single-chip microcomputer feed circuit according to claim 1, is characterized in that, the model of described chip IC 1 is LM7525.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520354322.6U CN204856368U (en) | 2015-05-28 | 2015-05-28 | Singlechip supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520354322.6U CN204856368U (en) | 2015-05-28 | 2015-05-28 | Singlechip supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204856368U true CN204856368U (en) | 2015-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520354322.6U Expired - Fee Related CN204856368U (en) | 2015-05-28 | 2015-05-28 | Singlechip supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204856368U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557052A (en) * | 2016-11-20 | 2017-04-05 | 广西大学 | A kind of smart electronicses information system based on shadow casting technique |
| CN106770999A (en) * | 2016-12-06 | 2017-05-31 | 百奥森（江苏）食品安全科技有限公司 | A kind of cloud detection system for mycotoxin |
| CN109708795A (en) * | 2019-01-10 | 2019-05-03 | 宁波天远五金有限公司 | A kind of omnipotent dynamometer |
| CN110160868A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of textile toughness stretching force detecting apparatus |
-
2015
- 2015-05-28 CN CN201520354322.6U patent/CN204856368U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557052A (en) * | 2016-11-20 | 2017-04-05 | 广西大学 | A kind of smart electronicses information system based on shadow casting technique |
| CN106770999A (en) * | 2016-12-06 | 2017-05-31 | 百奥森（江苏）食品安全科技有限公司 | A kind of cloud detection system for mycotoxin |
| CN110160868A (en) * | 2018-03-29 | 2019-08-23 | 浙江中越检测技术服务有限公司 | A kind of textile toughness stretching force detecting apparatus |
| CN109708795A (en) * | 2019-01-10 | 2019-05-03 | 宁波天远五金有限公司 | A kind of omnipotent dynamometer |
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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: 20151209 Termination date: 20160528 |