CN202977969U - Efficient protection circuit of laser coupling power source - Google Patents
Efficient protection circuit of laser coupling power source Download PDFInfo
- Publication number
- CN202977969U CN202977969U CN 201220624612 CN201220624612U CN202977969U CN 202977969 U CN202977969 U CN 202977969U CN 201220624612 CN201220624612 CN 201220624612 CN 201220624612 U CN201220624612 U CN 201220624612U CN 202977969 U CN202977969 U CN 202977969U
- Authority
- CN
- China
- Prior art keywords
- laser
- resistance
- triode
- coupling power
- base stage
- 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
Links
Images
Abstract
The utility model discloses an efficient protection circuit of a laser coupling power source. The efficient protection circuit includes a first power source VCC which adds power to a laser LD; a current-limiting fuse FUSE1 and a first resistor R1 which are connected in series are arranged between the laser LD and the first power source VCC; the first resistor R1 is connected to an emitter of a PNP triode Q1; and a collector of the Q1 is connected with the laser LD. The efficient protection circuit can well protect the laser coupling power source.
Description
Technical field
The utility model relates to a kind of efficient protective circuit of laser coupling power.
Background technology
At present, in the time of laser coupling (comprising TOSA, BOSA etc.), need to power up device.
A lot of laser Coupling devices on market are to power up this piece of defencive function not well established, generally only have punching or the electrostatic-proof function of letting slip commonly used, and the protection effect not comprehensively, reliable.
The utility model content
The utility model provides a kind of efficient protective circuit of laser coupling power, and this circuit has good circuit protection effect.
It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking: a kind of efficient protective circuit of laser coupling power; comprise the first power supply VCC that powers up to laser LD; be provided with current-limiting fuse FUSE1 and first resistance R 1 of series connection between described laser LD and the first power supply VCC; and the first resistance R 1 is connected to the emitter of PNP triode Q1, and the collector electrode of Q1 is connected with described laser LD.
Further preferred structure is also to be provided with a Transient Suppression Diode D6, the other end ground connection of described Transient Suppression Diode D6 at collector electrode and the described laser LD of described Q1.
Further preferred structure is, the base stage of described PNP triode Q1 connects a second source VCC2, and described second source VCC is connected to again the collector electrode of a NPN triode Q2, and the base stage of this triode Q2 is connected on the delivery outlet of single-chip microcomputer, and its emitter connects ground.
Further preferred structure is to be provided with one the 4th resistance R 4 between the base stage of described triode Q2 and the delivery outlet of single-chip microcomputer, and to be provided with one the 5th resistance between R4 and ground, the base stage of the described triode Q2 of other end connection of the 5th resistance.
Further preferred structure is, is provided with the second resistance R 2 and the 3rd resistance R 3 between the collector electrode of described second source VCC and described NPN triode Q2, and described the second resistance R 2 part that is connected with the 3rd resistance R 3 is connected with the base stage of described PNP triode Q1.
After the utility model has been taked such scheme, for the laser coupling power, good circuit protection effect is arranged.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from specification, perhaps understand by implementing the utility model.The purpose of this utility model and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Below in conjunction with accompanying drawing, the utility model is described in detail, so that above-mentioned advantage of the present utility model is clearer and more definite.
Fig. 1 is the schematic diagram of the efficient protective circuit of the utility model laser coupling power.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.
As shown in Figure 1; the efficient protective circuit of the utility model laser coupling power; can be in the laser coupling process, the protection comprehensively and effectively that powers up to laser can better prevent surge, overshoot, ESD, hot plug and the misoperation etc. that easily go out in circuit.
Its cardinal principle is: eliminate to the full extent surge, overshoot, ESD, hot plug and misoperation etc., and, multiple protective circuit, the validity of the single protection of reinforcement, the risk of reduction uncertain factor.
Wherein, a kind of principle of thought of protecting is, when powering up moment to laser, due to the characteristic of electronic devices and components, can produce overshoot, surge; May there be higher static in operational environment in addition; And laser has 2-6 pin, if can cause the laser damage of internal device after wrong.
As shown in Figure 1; the efficient protective circuit of described laser coupling power; comprise the first power supply VCC (being the application's laser coupling circuit) that powers up to laser LD; be provided with current-limiting fuse FUSE1 and first resistance R 1 of series connection between described laser LD and the first power supply VCC; and the first resistance R 1 is connected to the emitter of PNP triode Q1, and the collector electrode of Q1 is connected with described laser LD.
Collector electrode and described laser LD at described Q1 also are provided with a Transient Suppression Diode D6, the other end ground connection of described Transient Suppression Diode D6.
The base stage of described PNP triode Q1 connects a second source VCC2, and described second source VCC is connected to again the collector electrode of a NPN triode Q2, and the base stage of this triode Q2 is connected on the delivery outlet of single-chip microcomputer, and its emitter connects ground.
Be provided with one the 4th resistance R 4 between the base stage of described triode Q2 and the delivery outlet of single-chip microcomputer, and be provided with one the 5th resistance between R4 and ground, the other end of the 5th resistance connects the base stage of described triode Q2.
Be provided with the second resistance R 2 and the 3rd resistance R 3 between the collector electrode of described second source VCC and described NPN triode Q2, and described the second resistance R 2 part that is connected with the 3rd resistance R 3 is connected with the base stage of described PNP triode Q1.
Specifically, wherein FUSE is a kind of from recovery type fuse, and R1 and Q1 form current-limiting circuit, and R2, R3, Q2, R4, R5 and MCU control and form Intelligent switching circuit, and D6 is the transient state killer tube.LD is the laser of reception coupling.
When connecting electricity moment can produce overshoot the time, MCU will control not conducting of Q1, and the while, D6 can effectively control the phenomenon of surge, when having too high voltages to occur, D6 directly arrives GND with voltage turn-on, and the GND of circuit directly is connected with the earth, also effectively electrostatic leakage is gone out.When laser occur abnormal, such as the pin wrong, perhaps band point plug etc., MCU can turn-off Q1 moment, the protection laser.R1 and Q1 form current-limiting circuit and the current maxima in circuit can be limited in the scope of setting; can be automatically after surpassing by, in case the also electric current in supervisory circuit simultaneously of FUSE in addition is too high; can moment produce infinitely great internal resistance, protect to the full extent laser.
Left side VCC is the 5V dc power anode, and effect is the general supply that powers up to laser; FUSE1 is 110mA current limliting resettable fuse, and effect is the electric current in limiting circuit, makes its maximum be no more than protection range; R1 is 6.8 Ohmic resistances, and effect is dividing potential drop when the electric current in circuit is very large; Q1 is 8550, and effect is to come conducting or the cut-off of control circuit by controlling base voltage; LPV is the output IO mouth of single-chip microcomputer, and effect is to provide high-low level; R4 is 4.7K, and effect is to protect the power consumption of single-chip I/O mouth output in normal range (NR); R5 is 4.7K, acts on the same with R4; Q2 is 8050, and the voltage of R3 lower end is controlled in effect, makes its cut-off or arrives ground; R3 is 1K, effect and R2 dividing potential drop, and during to ground, dividing potential drop obtains 2.5V and supplies with the Q1 base stage; R2 is 1K, acts on same R3; The VCC of low order end is 5V, and effect is to Q1 base stage power supply general supply; D6 Transient Suppression Diode, effect are that the magnitude of voltage at protection LD two ends is no more than protection voltage, and when voltage surpassed, moment was received ground with electric current; LD is the schematic diagram of laser, is used for external laser.
After the utility model has been taked such scheme, for the laser coupling power, good circuit protection effect is arranged.
It should be noted that at last: the above only is preferred embodiment of the present utility model, be not limited to the utility model, although with reference to previous embodiment, the utility model is had been described in detail, for a person skilled in the art, it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. the efficient protective circuit of a laser coupling power; comprise the first power supply VCC that powers up to laser LD; it is characterized in that; be provided with current-limiting fuse FUSE1 and first resistance R 1 of series connection between described laser LD and the first power supply VCC; and the first resistance R 1 is connected to the emitter of PNP triode Q1, and the collector electrode of Q1 is connected with described laser LD.
2. the efficient protective circuit of laser coupling power according to claim 1, is characterized in that, also is provided with a Transient Suppression Diode D6, the other end ground connection of described Transient Suppression Diode D6 at collector electrode and the described laser LD of described Q1.
3. the efficient protective circuit of described laser coupling power according to claim 1 and 2; it is characterized in that; the base stage of described PNP triode Q1 connects a second source VCC2; and described second source VCC is connected to again the collector electrode of a NPN triode Q2; the base stage of this triode Q2 is connected on the delivery outlet of single-chip microcomputer, and its emitter connects ground.
4. the efficient protective circuit of laser coupling power according to claim 3; it is characterized in that; be provided with one the 4th resistance R 4 between the base stage of described triode Q2 and the delivery outlet of single-chip microcomputer; and be provided with one the 5th resistance between R4 and ground, the other end of the 5th resistance connects the base stage of described triode Q2.
5. the efficient protective circuit of laser coupling power according to claim 3; it is characterized in that; be provided with the second resistance R 2 and the 3rd resistance R 3 between the collector electrode of described second source VCC and described NPN triode Q2, and described the second resistance R 2 part that is connected with the 3rd resistance R 3 is connected with the base stage of described PNP triode Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624612 CN202977969U (en) | 2012-11-13 | 2012-11-13 | Efficient protection circuit of laser coupling power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624612 CN202977969U (en) | 2012-11-13 | 2012-11-13 | Efficient protection circuit of laser coupling power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202977969U true CN202977969U (en) | 2013-06-05 |
Family
ID=48518997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220624612 Expired - Fee Related CN202977969U (en) | 2012-11-13 | 2012-11-13 | Efficient protection circuit of laser coupling power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202977969U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793185A (en) * | 2016-11-28 | 2017-05-31 | 林桂清 | A kind of heater of utilization ceramic material |
| CN108270196A (en) * | 2016-12-30 | 2018-07-10 | 武汉奇致激光技术股份有限公司 | A kind of crossed for photon aesthetic equipment can protective device and its control method |
-
2012
- 2012-11-13 CN CN 201220624612 patent/CN202977969U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793185A (en) * | 2016-11-28 | 2017-05-31 | 林桂清 | A kind of heater of utilization ceramic material |
| CN108270196A (en) * | 2016-12-30 | 2018-07-10 | 武汉奇致激光技术股份有限公司 | A kind of crossed for photon aesthetic equipment can protective device and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101867168B (en) | Power protecting circuit and LED lamp | |
| CN204965104U (en) | Air conditioner and last electricity and current foldback circuit of intelligence power module thereof | |
| CN104218539A (en) | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply | |
| CN202373957U (en) | Over-voltage and under-voltage protection circuit | |
| CN106972769A (en) | A kind of light current electrical load overvoltage crowbar | |
| CN108039695B (en) | Overvoltage crowbar | |
| CN105633905A (en) | Overvoltage and under-voltage protection circuit | |
| CN103545803A (en) | Protective device of equipment power source interface circuit | |
| CN209462021U (en) | A kind of reverse connection preventing over-pressure safety device, earphone and USB charging unit | |
| CN201629569U (en) | Over-voltage protection circuit of USB interface | |
| CN204068678U (en) | A kind of Switching Power Supply output over-voltage protection and thermal-shutdown circuit | |
| CN203734283U (en) | Power supply protection circuit and power supply device | |
| CN202977969U (en) | Efficient protection circuit of laser coupling power source | |
| CN104779577A (en) | Over-current protection circuit | |
| CN101697410B (en) | Short-circuit protection circuit adopted in battery charger circuit | |
| CN204738991U (en) | Fan control and protection circuit | |
| CN203456859U (en) | Short-circuit protection circuit | |
| CN102709870A (en) | Power supply protection circuit and electronic product | |
| CN103325523B (en) | Electromagnet protection circuit | |
| CN204835485U (en) | Excess temperature protection circuit of UPS charger | |
| CN205141638U (en) | Switching power supply output short circuit disconnection protection circuit | |
| CN203387159U (en) | Short circuit protection circuit of triode voltage stabilizing circuit | |
| CN208753961U (en) | A kind of negative voltage protection circuit of power input over-voltage | |
| CN206060723U (en) | Communicating circuit between AGV circuit boards | |
| CN207251245U (en) | A kind of charge protector |
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: 20130605 Termination date: 20161113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |