CN203387749U - MOS fault protection line - Google Patents
MOS fault protection line Download PDFInfo
- Publication number
- CN203387749U CN203387749U CN201320527187.1U CN201320527187U CN203387749U CN 203387749 U CN203387749 U CN 203387749U CN 201320527187 U CN201320527187 U CN 201320527187U CN 203387749 U CN203387749 U CN 203387749U
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- CN
- China
- Prior art keywords
- mos
- resistance
- diode
- fault protection
- protection line
- Prior art date
- 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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses an MOS fault protection line and belongs to the technical field of electronic illumination. The MOS fault protection line mainly comprises an alternating-current power supply, a bridge rectifier, a fuse, a transformer, a switch tube, a resistor, and a control IC. The MOS fault protection line also comprises a diode. The anode of the diode is connected with one end of the resistor while the cathode of the diode is connected with the other end, which is grounded, of the resistor, and thus, a forward-direction parallel connection relationship of the resistor and the diode is established. The MOS fault protection line is provided with the protective resistor and the control IC cannot be burnt and smoke. At the same time, the MOS fault protection line is simple so that the production technology is simple, the production efficiency is increased, and the production cost is reduced.
Description
Technical field
The utility model relates to the electrical lighting technical field, particularly a kind of MOS error protection circuit.
Background technology
Along with the fast development of LED light fixture technology is increasingly mature with application, the pith that the LED driving power can luminescence display as the LED light fixture, its technical development is swift and violent.But LED driving power technology is compared the traditional switch power supply; want cube little; simple in circuits; thereby cause the route protection deficiency; cause when the practical application of LED light fixture, the switching tube of LED driving power (MOSFET) short circuit of breaking down, now the LED driving power will there will be the naked light of smoldering; cause the LED light fixture to work, can't reach the requirement of Safety Approval simultaneously.
As shown in Figure 1, after switching tube (MOSFET) short trouble, alternating current (AC), through heap (BD1), transformer (TRANSFORMER), the switching tube (MOSFET) of passing a bridge, then directly is added to resistance (RS) upper, last ground connection; The LED driving power is due to the restriction that is subject to volume simultaneously, resistance (RS) adopts several SMD resistance to be formed in parallel usually, cause underpower, short circuit current can combust resistance (RS), when resistance (RS) combust be blown after large electric current can be through controlling IC to ground, to control IC and burn out, the LED driving power is burned, and finally cause the LED light fixture to work; Simultaneously this kind of LED driving power needs larger space, therefore causes the space limited in the LED lamp interior can't miniaturization.
Summary of the invention
In order to solve above-mentioned existing technical deficiency and defect, the purpose of this utility model is to provide a kind of MOS error protection circuit.
The purpose of this utility model is achieved by the following technical solution:
A kind of MOS error protection circuit, mainly comprise alternating current (AC), bridge heap (BD1), fuse (FUSE), transformer (TRANSFORMER), switching tube (MOSFET), resistance (RS) and control IC; Also comprise a diode (D1), the positive pole of described diode (D1) is connected with an end of resistance (RS), and its negative pole is connected with the other end of resistance (RS) ground connection, forms forward relation in parallel of resistance (RS) and diode (D1).
As the optional technical scheme of the utility model, described resistance (RS) can adopt single plug-in unit resistance also can adopt the parallel connection of many SMD resistance.
In sum, MOS error protection circuit provided by the utility model, the beneficial effect had:
1, guarantee resistance (RS) and control IC can not be burned and smolder.
2, thereby the simple formation of circuit production technology is simple, has improved production efficiency, has reduced production cost.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is prior art scheme circuit.
The schematic diagram that Fig. 2 is a kind of embodiment of the utility model MOS error protection circuit.
Description of reference numerals: AC: alternating current; FUSE: fuse; BD1: bridge heap; TRANSFORMER: transformer; MOSFET: switching tube; RS: resistance; D1: diode.
Embodiment
Below by embodiment also by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.Following with reference to accompanying drawing, the explanation to execution mode of the present utility model is intended to present general inventive concept of the present utility model is made an explanation, and not should be understood to a kind of restriction of the present utility model.
Shown in accompanying drawing 2; the utility model provides a kind of MOS error protection circuit, comprises alternating current (AC), fuse (FUSE), bridge heap (BD1), transformer (TRANSFORMER), switching tube (MOSFET), resistance (RS), diode (D1).
As shown in Fig. 2 embodiment, described bridge heap (BD1) four interfaces, first interface is connected with fuse (FUSE) end, the second interface earth terminal, the 3rd interface is connected with an end of alternating current (AC), and the 4th interface is connected with transformer (TRANSFORMER); The other end of described fuse (FUSE) is connected with the other end of alternating current (AC).Described switching tube (MOSFET) has three contacts, the first contact is connected with a wherein contact of controlling IC, the second contact is connected with described transformer (TRANSFORMER), and the 3rd contact is connected with another contact, an end of described resistance (RS) and the positive pole of described diode of described control IC simultaneously; Earth terminal after the other end of described resistance (RS) is connected with the negative pole of described diode, form forward relation in parallel of described resistance (RS) and described diode (D1).
In the utility model, described resistance (RS) can be plug-in unit resistance or the parallel connection of many SMD resistance; In embodiment as shown in Figure 2, described resistance (RS) adopts plug-in unit resistance.
As shown in Figure 2; after switching tube (MOSFET) breaks down short circuit; electric current is through bridge heap (BD1), transformer (TRANSFORMER), switching tube (MOSFET); then directly be added to resistance (RS) diode (D1) to the ground end; now diode (D1) can be by the unit clamper at resistance (RS) two ends in the 1.1V left and right; thereby the loss power of guaranteeing resistance (RS) is very little; protective resistance (RS) can not be burned; large electric current can directly blow fuse (FUSE), and further protection control IC can not be burnt.Therefore, after fuse (FUSE) is blown, can replace easily another intact fuse, thereby reduce the loss of LED driving power, guarantee that the LED light fixture can work in time.
The above embodiment has only expressed preferred implementation of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims and embodiment.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (2)
1. a MOS error protection circuit, mainly comprise alternating current (AC), bridge heap (BD1), fuse (FUSE), transformer (TRANSFORMER), switching tube (MOSFET), resistance (RS) and control IC; It is characterized in that, also comprise a diode (D1), the positive pole of described diode (D1) is connected with an end of resistance (RS), and its negative pole is connected with the other end of resistance (RS) ground connection, forms forward relation in parallel of resistance (RS) and diode (D1).
2. MOS error protection circuit according to claim 1, is characterized in that, described resistance (RS) can adopt single plug-in unit resistance also can adopt the parallel connection of many SMD resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527187.1U CN203387749U (en) | 2013-08-28 | 2013-08-28 | MOS fault protection line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320527187.1U CN203387749U (en) | 2013-08-28 | 2013-08-28 | MOS fault protection line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387749U true CN203387749U (en) | 2014-01-08 |
Family
ID=49876194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320527187.1U Expired - Fee Related CN203387749U (en) | 2013-08-28 | 2013-08-28 | MOS fault protection line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203387749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415123A (en) * | 2013-08-28 | 2013-11-27 | 深圳市东方之星电源有限公司 | MOS fault protection circuit |
-
2013
- 2013-08-28 CN CN201320527187.1U patent/CN203387749U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415123A (en) * | 2013-08-28 | 2013-11-27 | 深圳市东方之星电源有限公司 | MOS fault protection circuit |
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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: 20140108 Termination date: 20160828 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |