CN205375089U - Take power supply switching circuit of isolation control function - Google Patents
Take power supply switching circuit of isolation control function Download PDFInfo
- Publication number
- CN205375089U CN205375089U CN201620029799.1U CN201620029799U CN205375089U CN 205375089 U CN205375089 U CN 205375089U CN 201620029799 U CN201620029799 U CN 201620029799U CN 205375089 U CN205375089 U CN 205375089U
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- circuit
- control chip
- power supply
- power source
- external power
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Abstract
The utility model relates to a take power supply switching circuit of isolation control function, including a switch circuit, a MCU controller, a detection circuitry, still include an on -off control chip and an external power source, the MCU controller connect in detection circuitry reaches between the on -off control chip, and this on -off control chip and this external power source meet, under circuit overload condition, detection circuitry produces the high level and feeds back to the MCU controller, this MCU controller producing signals reaches on -off control chip, this on -off control chip pass through external power source control switch's shutoff, carry out overload protection. The utility model discloses an operating condition that the power supply switching circuit utilized detection circuitry to judge supply circuit when supply circuit transships, adds external power source through the on -off control chip and closes switch circuit, carries out the automatic protection, has guaranteed circuit overload protection's stability and security.
Description
Technical field
This utility model relates to a kind of on-off circuit, particularly relates to a kind of switching circuit of power supply controlling function with isolation.
Background technology
Electric energy is a kind of energy easily, and its extensive use defines the second technical revolution in mankind's modern history.Effectively promote the development of human society, created great riches to the mankind, improve the life of the mankind.In producing and living, people be unable to do without electricity at present.
Along with the constantly progressive development with science and technology of society, people become more concerned with the earth that we depend on for existence, so low-carbon environment-friendly becomes megatrend already.Meanwhile, along with the raising of people's living standard, being continuously increased of household electrical appliance, with in electric process, the person caused due to the carelessness of people gets an electric shock and fire incident, causes very big threat to the life of the people and property.Making great efforts to carry out so saves energy and safety utilization of electric power are people, therefore power switch circuit has application in the middle of people live always.In the design of existing on-off circuit, control to switch on-off by the internal electric source of MCU control unit so that it is the teaching display stand protection when overload；But this design easily causes the instability of MCU in complicated power supply applied environment, brings potential safety hazard.
Utility model content
This utility model aims to provide a kind of switching circuit of power supply controlling function with isolation, the problem unstable to solve existing power supply on-off circuit overload protection.
nullThis utility model discloses the on-off circuit of a kind of power supply controlling function with isolation，It is connected between power supply and load，Including an on-off circuit、One MCU controller、One testing circuit，Also include a switch control chip and an external power source，Described on-off circuit includes a control end、One first link、One second link、One the 3rd link and one the 4th link，Described control end connects described switch control chip，Described first link connects power supply，Described second link connects voltage output end，Described 3rd link connects described testing circuit，Described 4th link connects described external power source，Described MCU controller is connected between described testing circuit and described switch control chip，And this switch control chip connects with this external power source，Under circuit overloads state，Described testing circuit produces high level and feeds back to described MCU controller，This MCU controller produces signal and reaches described switch control chip，This switch control chip controls switch-off by external power source，Carry out overload protection.
As further improvement of the utility model, the microprocessor of MCU control circuit is 90CAN32-16U single-chip microcomputer.
As further improvement of the utility model, described switch control chip is ULN2803AFWG chip.
As further improvement of the utility model, also including by LED indicating circuit, described LED indicating circuit is connected with MCU control circuit.
Switching circuit of power supply of the present utility model utilizes testing circuit to judge the duty of power supply circuits; when power supply circuits transship; add external power source by switch control chip to be closed by on-off circuit, automatically protect, it is ensured that the stability of circuit overloads protection and safety.
Accompanying drawing explanation
Fig. 1 is the theory diagram of a kind of power supply circuits switch controlling function with isolation of the present utility model；
Fig. 2 is the circuit diagram of on-off circuit of the present utility model and testing circuit；
Fig. 3 is the schematic diagram of switch control chip of the present utility model；
Fig. 4 is the schematic diagram of MCU controller of the present utility model.
Detailed description of the invention
For further illustrating each embodiment, this utility model is provided with accompanying drawing.These accompanying drawings are a part for this utility model disclosure, and it is mainly in order to illustrate embodiment, and the associated description of description can be coordinated to explain the operation principles of embodiment.Coordinating with reference to these contents, those of ordinary skill in the art will be understood that other possible embodiments and advantage of the present utility model.Assembly in figure is not necessarily to scale, and similar element numbers is conventionally used to indicate similar assembly.
In conjunction with the drawings and specific embodiments, this utility model is further illustrated.
Referring to Fig. 1-4, this utility model discloses a kind of switching circuit of power supply controlling function with isolation, this switching circuit of power supply is connected between power supply 6 and load 7, including on-off circuit 1, testing circuit 2, MCU controller 3, switch control chip 4 and an external power source 5.
Described on-off circuit 1 includes a control end, one first link, one second link, one the 3rd link and one the 4th link；In the present embodiment, described control end connects described switch control chip 4, described first link connects power supply 6, described second link connects load 7, described 3rd link connects described testing circuit 2, described 4th link connects described external power source 5, and described MCU controller 3 is connected between described testing circuit 2 and described switch control chip 4.
In the present embodiment, testing circuit 2 is over-voltage detection circuit, and when circuit voltage is beyond limit value, testing circuit pin can produce high level output to MCU controller.Of coursing, testing circuit of the present utility model can also is that over-current detection circuit or overheating detection circuit, for electric current or the power of testing circuit.
In the present embodiment, described MCU controller 3 adopts 90CAN32-16U single chip machine controlling circuit normal operation, referring to Fig. 4；
Described switch control chip 4 adopts ULN2803AFWG chip, and chip pin is connected with external power source, and chip is with crystal oscillating circuit, referring to Fig. 3.
Described external power source 5 is 12V regulated power supply.
The principle of the described switching circuit of power supply controlling function with isolation is: when overvoltage phenomenon occurs in described power supply 6, pin on described testing circuit 2 produces high level and feeds back to MCU controller 3, MCU controller 3 produces signal and sends to switch control chip 4, and switch control chip 4 controls on-off circuit 1 by external power source 5 and closes.
Switching circuit of power supply of the present utility model utilizes testing circuit to judge the duty of power supply circuits; when power supply circuits transship; add external power source 5 by switch control chip 4 to be closed by on-off circuit 1, automatically protect, it is ensured that the stability of circuit overloads protection and safety.
Although specifically showing in conjunction with preferred embodiment and describing this utility model; but those skilled in the art should be understood that; in the spirit and scope of the present utility model limited without departing from appended claims; this utility model can be made a variety of changes in the form and details, be protection domain of the present utility model.
Claims (4)
- null1. the switching circuit of power supply controlling function with isolation，It is connected between power supply and load，Including an on-off circuit、One MCU controller、One testing circuit，It is characterized in that: also include a switch control chip and an external power source，Described on-off circuit includes a control end、One first link、One second link、One the 3rd link and one the 4th link，Described control end connects described switch control chip，Described first link connects power supply，Described second link connects voltage output end，Described 3rd link connects described testing circuit，Described 4th link connects described external power source，Described MCU controller is connected between described testing circuit and described switch control chip，And this switch control chip connects with this external power source，Under circuit overloads state，Described testing circuit produces high level and feeds back to described MCU controller，This MCU controller produces signal and reaches described switch control chip，This switch control chip controls switch-off by external power source，Carry out overload protection.
- 2. the on-off circuit of the power supply controlling function with isolation according to claim 1, it is characterised in that: the microprocessor of described MCU control circuit is 90CAN32-16U single-chip microcomputer.
- 3. the switching circuit of power supply controlling function with isolation according to claim 1, it is characterised in that: described switch control chip is ULN2803AFWG chip.
- 4. the switching circuit of power supply controlling function with isolation according to claim 1, it is characterised in that: also including LED indicating circuit, described LED indicating circuit is connected with MCU control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029799.1U CN205375089U (en) | 2016-01-13 | 2016-01-13 | Take power supply switching circuit of isolation control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029799.1U CN205375089U (en) | 2016-01-13 | 2016-01-13 | Take power supply switching circuit of isolation control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205375089U true CN205375089U (en) | 2016-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620029799.1U Expired - Fee Related CN205375089U (en) | 2016-01-13 | 2016-01-13 | Take power supply switching circuit of isolation control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205375089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018201605A1 (en) * | 2017-05-05 | 2018-11-08 | 深圳市云顶信息技术有限公司 | Electric toothbrush |
-
2016
- 2016-01-13 CN CN201620029799.1U patent/CN205375089U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018201605A1 (en) * | 2017-05-05 | 2018-11-08 | 深圳市云顶信息技术有限公司 | Electric toothbrush |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 361000 406A, North Tower, Weiye building, Pioneer Park, torch high tech Zone, Xiamen, Fujian Patentee after: Xiamen herine Polytron Technologies Inc Address before: 361000 floor four, 186 Yuehua Road, Huli District, Xiamen City, Fujian province (Ma Long Agricultural Bank upstairs) Patentee before: Xiamen Herine Electronics 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: 20160706 Termination date: 20190113 |