CN202587466U - Emergency switching circuit - Google Patents
Emergency switching circuit Download PDFInfo
- Publication number
- CN202587466U CN202587466U CN2012200385994U CN201220038599U CN202587466U CN 202587466 U CN202587466 U CN 202587466U CN 2012200385994 U CN2012200385994 U CN 2012200385994U CN 201220038599 U CN201220038599 U CN 201220038599U CN 202587466 U CN202587466 U CN 202587466U
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- resistance
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- battery
- negative pole
- led lamp
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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
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The embodiment of the utility model discloses an emergency switching circuit, which employs a field effect transistor for switching control, thereby avoiding the phenomenon that the traditional relay generates a heavy current at a switching contact when controlling switching, and prolonging the service life of the whole circuit; which employs a control chip for control, thereby effectively managing battery discharging; and additionally, which employs a ninth resistor to enable a battery to perform constant current discharging on an LED lamp, thereby effectively ensuring the work reliability of battery and being simple in operation.
Description
Technical field
The utility model relates to the LED lighting field, relates in particular to a kind of emergent commutation circuit.
Background technology
At present, the LED technology is progressively applied as a kind of novel illumination technology in the world.The LED switching power circuit is as a kind of universal basically circuit; It comprises structure as shown in Figure 1: LED lamp, main power supply circuits, lead-acid battery, battery charger and emergent commutation circuit; Wherein main power supply circuits and battery charger include EMI circuit, current rectifying and wave filtering circuit, main switch power converting circuit and secondary commutation filter circuit, also are provided with mains switch on the main power supply circuits.Because the emergent commutation circuit of prior art generally adopts relay to carry out switching controls, the double-throw contact electric current is bigger, and useful life is shorter, and can't effectively manage battery discharge, can't guarantee battery operated reliability.
The utility model content
The utility model embodiment technical problem to be solved is, a kind of emergent commutation circuit is provided, and effectively reducing the double-throw contact electric current, prolongs circuit useful life, and effectively manages battery discharge.
In order to solve the problems of the technologies described above; The utility model embodiment has proposed a kind of emergent commutation circuit; Comprise that input is anodal, import negative pole, anode, GND, LED lamp positive pole, LED lamp negative pole, transistor, FET and control chip; Said transistor comprises base stage, emitter and collector electrode, and said FET comprises grid, source electrode and drain electrode;
Said input positive pole links to each other with anode and LED lamp positive pole respectively;
Said input negative pole links to each other with GND and emitter respectively;
Said collector electrode links to each other with grid, and said emitter links to each other with source electrode, and said drain electrode links to each other with LED lamp negative pole, and said collector electrode links to each other with said emitter through first resistance;
Second resistance with receive said base stage through the 3rd resistance after the 3rd resistance is parallelly connected, said second resistance also links to each other with input is anodal, said the 3rd resistance also with import negative pole and link to each other;
Said control chip comprises through the 5th resistance and links to each other with said anode and link to each other with said GND with the first terminal of collection battery real-time voltage through the 6th resistance, and links to each other to compare second terminal of the said FET conducting of control with reference voltage according to said battery real-time voltage with said grid.
Further, said control chip also comprises through the 7th resistance and the 8th resistance and linking to each other with said input negative pole battery is carried out the 3rd terminal of constant current charge.
Further, said drain electrode links to each other so that battery is carried out constant-current discharge with said LED lamp negative pole through the 9th resistance.
The utility model embodiment adopts FET to control switching through a kind of emergent commutation circuit is provided, and produces the phenomenon of big electric current when having avoided traditional relay control to switch in double-throw contact, has prolonged the useful life of entire circuit; Adopt control chip to control, can effectively manage battery discharge; In addition, adopt the 9th resistance can also make battery, and then effectively guarantee battery operated reliability LED lamp constant-current discharge.
Description of drawings
Fig. 1 is the primary structure figure of the emergent commutation circuit of the utility model embodiment.
Fig. 2 is the circuit structure diagram of emergent commutation circuit when using of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment is elaborated to the utility model.
With reference to Fig. 1; The emergent commutation circuit of the utility model embodiment mainly comprises input positive pole 101, input negative pole 102, anode 103, GND 104, LED lamp positive pole 105, LED lamp negative pole 106, transistor Q2, FET Q1 and control chip U3; Transistor Q2 comprises base stage B, emitter E and collector electrode C; FET Q1 comprises grid G, source S and drain D, and wherein each element annexation is following:
Input negative pole 102 links to each other with GND 104 and emitter E respectively;
Collector electrode C links to each other with grid G, and emitter E links to each other with source S, and drain D links to each other with LED lamp negative pole 106, and collector electrode C links to each other with emitter E through first resistance R 45;
Second resistance R 43 is received base stage B with the 3rd resistance R 42 parallelly connected backs through the 3rd resistance R 60, and second resistance R 43 also links to each other with input anodal 101, and the 3rd resistance R 42 also links to each other with input negative pole 102;
Control chip U3 comprises through the 5th resistance R 68 and links to each other with anode 103 and link to each other with GND 104 with the first terminal 3 of collection battery real-time voltage through the 6th resistance R 50, and links to each other to compare second terminal 1 of control FET Q1 conducting with reference voltage according to the battery real-time voltage with grid G.
In addition, control chip U3 also comprises through the 7th resistance R 5 and the 8th resistance R 66 and linking to each other battery is carried out the 3rd terminal 6 of constant current charge with input negative pole 102.
And drain D links to each other with LED lamp negative pole 106 battery being carried out constant-current discharge through the 9th resistance R 4, and then effectively guarantees battery operated reliability.
Face concrete an application of the emergent commutation circuit of above-mentioned the utility model embodiment down and carry out the principle explanation:
In the commutation circuit of should meeting an urgent need, R42 and R43 follow the tracks of input anodal 101 and whether input negative pole 102 has civil power, if civil power is arranged, meeting produces voltage on R42 and R43; Make the Q2 conducting through R60 again, thereby Q1 is ended, this moment, battery did not discharge to the LED lamp, and U3, R5 and R66 form constant-current circuit; Battery is carried out constant current charge, and when importing the mains failure of positive pole 101 and input negative pole 102 signs, R42 and R43 can not produce voltage, through R60 Q2 are ended; Whether Q1 can be decided by the reference voltage that U3 sets in conducting, and for example, when cell voltage was higher than the first reference voltage 11.5V, R68 and R50 can carry out the real-time voltage collection to battery; First reference voltage inner with U3 compares, and makes 1 pin of U3 can open a high level, makes the Q1 conducting through R46; Begin discharge this moment to LED, behind minimum voltage (second reference voltage) 9.5V that discharges into the battery qualification, 1 pin of U3 meeting output low level; Make Q1 end, battery does not discharge, thus the protection battery; The length of discharge time is relevant with battery capacity, and in addition, R4 control battery is to the electric current of LED discharge.
The above is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection range of the utility model.
Claims (3)
1. emergent commutation circuit; It is characterized in that; Comprise that input is anodal, import negative pole, anode, GND, LED lamp positive pole, LED lamp negative pole, transistor, FET and control chip; Said transistor comprises base stage, emitter and collector electrode, and said FET comprises grid, source electrode and drain electrode;
Said input positive pole links to each other with anode and LED lamp positive pole respectively;
Said input negative pole links to each other with GND and emitter respectively;
Said collector electrode links to each other with grid, and said emitter links to each other with source electrode, and said drain electrode links to each other with LED lamp negative pole, and said collector electrode links to each other with said emitter through first resistance;
Second resistance with receive said base stage through the 3rd resistance after the 3rd resistance is parallelly connected, said second resistance also links to each other with input is anodal, said the 3rd resistance also with import negative pole and link to each other;
Said control chip comprises through the 5th resistance and links to each other with said anode and link to each other with said GND with the first terminal of collection battery real-time voltage through the 6th resistance, and links to each other to compare second terminal of the said FET conducting of control with reference voltage according to said battery real-time voltage with said grid.
2. emergent commutation circuit as claimed in claim 1 is characterized in that, said control chip also comprises through the 7th resistance and the 8th resistance and linking to each other with said input negative pole battery is carried out the 3rd terminal of constant current charge.
3. emergent commutation circuit as claimed in claim 1 is characterized in that, said drain electrode links to each other so that battery is carried out constant-current discharge with said LED lamp negative pole through the 9th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200385994U CN202587466U (en) | 2012-02-07 | 2012-02-07 | Emergency switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200385994U CN202587466U (en) | 2012-02-07 | 2012-02-07 | Emergency switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202587466U true CN202587466U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200385994U Expired - Fee Related CN202587466U (en) | 2012-02-07 | 2012-02-07 | Emergency switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202587466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979666A (en) * | 2016-08-02 | 2016-09-28 | 惠勇 | Self-adaptive LED drive power supply |
-
2012
- 2012-02-07 CN CN2012200385994U patent/CN202587466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979666A (en) * | 2016-08-02 | 2016-09-28 | 惠勇 | Self-adaptive LED drive power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangxi province photoelectric Co., Ltd. Chi Chi Assignor: Shenzhen MTC Lighting Co.,Ltd. Contract record no.: 2014360000224 Denomination of utility model: Emergency switching circuit Granted publication date: 20121205 License type: Exclusive License Record date: 20140807 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20150207 |
|
| EXPY | Termination of patent right or utility model |