CN202206296U - Switching power supply - Google Patents
Switching power supply Download PDFInfo
- Publication number
- CN202206296U CN202206296U CN2011203424572U CN201120342457U CN202206296U CN 202206296 U CN202206296 U CN 202206296U CN 2011203424572 U CN2011203424572 U CN 2011203424572U CN 201120342457 U CN201120342457 U CN 201120342457U CN 202206296 U CN202206296 U CN 202206296U
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- CN
- China
- Prior art keywords
- circuit
- power supply
- switching power
- short
- output end
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a switching power supply which comprises a shell and a circuit module, wherein the shell is provided with a shielding cover; the circuit module is located in the shielding cover; the circuit module comprises a main switching power circuit with a positive voltage output end and a negative voltage output end; an output end of the main switching power circuit is connected to a short-circuit monitoring circuit; the output end of the short-circuit monitoring circuit is connected to a protection trigger locking circuit so as to lock the state of the main switching power circuit; an executing mechanism and a standby power supply are arranged at an input end of the main switching power circuit; one end of a control end of the executing mechanism is connected to the output end of the standby power supply; and the other end of the control end of the executing mechanism is connected to the protection trigger locking circuit through a driving circuit. In the switching power supply, the short-circuit monitoring circuit is additionally arranged at the output end of the main switching power circuit and is used for monitoring power output in real time, and when a load is short-circuited, the switching power supply is switched off in time and the state of the power supply is locked by the protection trigger locking circuit, thereby avoiding safety accidents, such as high temperature, and the like, caused by the overload of the power supply.
Description
Technical field
The utility model belongs to Switching Power Supply structure-design technique field.
Background technology
Traditional Switching Power Supply, its control chip generally all are that the former limit of transformer peak current is carried out periodic sampling, monitors and realize real-time control.But under high voltage, be difficult to accomplish that whole voltage range internal power protection point is consistent, or output shortwave electric current is bigger than normal during high input voltage, or machine has been driven not in heavy duty during low input.A kind of in addition overpower protection method commonly used is to carry out output end current sampling, and sampling structure and set point compare, and just lets protective circuit play a role after reaching set point, still exists complicated circuit, the weak point that cost is higher relatively.
Summary of the invention
The purpose of the utility model provides the thorough and lower-cost Switching Power Supply of a kind of protection effect.
The technical scheme that realizes the utility model purpose is: a kind of Switching Power Supply comprises housing that is provided with radome and the circuit module that is positioned at radome; It is characterized in that: said circuit module comprises the main switch power circuit with positive voltage output end and negative voltage output; The output of said main switch power circuit links to each other with a short circuit observation circuit; The output of said short-circuit detecting circuit is connected with a protection and triggers lock-in circuit, realizes the locking to the main switch power circuit state; Input at the main switch power circuit also is provided with an actuator and a standby power, and control end one end of said final controlling element connects the output of standby power, and the other end links to each other through triggering lock-in circuit with drive circuit and said protection.
The utility model is through setting up short-circuit detecting circuit at the output of main switch power supply; Output is monitored to power supply in real time; When load is short-circuited; Promptly be the off switch power supply and trigger lock-in circuit through protection power supply status is locked, avoid because power supply transships the generation of the security incidents such as high temperature that cause.
Description of drawings
Fig. 1 is a kind of block diagram of the utility model.
Embodiment
(embodiment 1)
Fig. 1 is a kind of block diagram of the utility model, has shown a kind of concrete occupation mode of the utility model.
Present embodiment is a kind of Switching Power Supply, comprises housing that is provided with radome and the circuit module that is positioned at radome; Said circuit module comprises the main switch power circuit with positive voltage output end and negative voltage output; The output of said main switch power circuit links to each other with a short circuit observation circuit; The output of said short-circuit detecting circuit is connected with a protection and triggers lock-in circuit, realizes the locking to the main switch power circuit state; Input at the main switch power circuit also is provided with an actuator and a standby power, and control end one end of said final controlling element connects the output of standby power, and the other end links to each other through triggering lock-in circuit with drive circuit and said protection.
Present embodiment is through setting up short-circuit detecting circuit at the output of main switch power supply; Output is monitored to power supply in real time; When load is short-circuited; Promptly be the off switch power supply and trigger lock-in circuit through protection power supply status is locked, avoid because power supply transships the generation of the security incidents such as high temperature that cause.
Obviously, the foregoing description of the utility model only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these connotations that belong to the utility model are extended out or change still belong to the protection range of the utility model.
Claims (1)
1. a Switching Power Supply comprises housing that is provided with radome and the circuit module that is positioned at radome; It is characterized in that: said circuit module comprises the main switch power circuit with positive voltage output end and negative voltage output; The output of said main switch power circuit links to each other with a short circuit observation circuit; The output of said short-circuit detecting circuit is connected with a protection and triggers lock-in circuit, realizes the locking to the main switch power circuit state; Input at the main switch power circuit also is provided with an actuator and a standby power, and control end one end of said final controlling element connects the output of standby power, and the other end links to each other through triggering lock-in circuit with drive circuit and said protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203424572U CN202206296U (en) | 2011-09-14 | 2011-09-14 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203424572U CN202206296U (en) | 2011-09-14 | 2011-09-14 | Switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202206296U true CN202206296U (en) | 2012-04-25 |
Family
ID=45970391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203424572U Expired - Fee Related CN202206296U (en) | 2011-09-14 | 2011-09-14 | Switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202206296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746343A (en) * | 2013-12-13 | 2014-04-23 | 四川格来消防电器设备有限公司 | Switching power supply circuit of firefighting emergency power supply |
-
2011
- 2011-09-14 CN CN2011203424572U patent/CN202206296U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746343A (en) * | 2013-12-13 | 2014-04-23 | 四川格来消防电器设备有限公司 | Switching power supply circuit of firefighting emergency power supply |
| CN103746343B (en) * | 2013-12-13 | 2016-08-31 | 四川格来消防电器设备有限公司 | A kind of switching power circuit of fire-fighting emergency power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20120914 |