CN205039397U - Semiconductor laser drive power supply with open circuit protection function - Google Patents
Semiconductor laser drive power supply with open circuit protection function Download PDFInfo
- Publication number
- CN205039397U CN205039397U CN201520698776.5U CN201520698776U CN205039397U CN 205039397 U CN205039397 U CN 205039397U CN 201520698776 U CN201520698776 U CN 201520698776U CN 205039397 U CN205039397 U CN 205039397U
- Authority
- CN
- China
- Prior art keywords
- circuit
- semiconductor laser
- current
- open circuit
- laser
- 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.)
- Active
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 19
- 230000001681 protective effect Effects 0.000 abstract 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The utility model provides a semiconductor laser drive power supply with open circuit protection function, contains AC -DC converting circuit, single -chip control circuit, comparison circuit, drive circuit, current feedback circuit, laser instrument and protective device, current -limiting circuit, characterized by: increased laser instrument open circuit protection circuit, the open circuit protection circuit is connected with single -chip control circuit, drive circuit, and the open circuit protection circuit includes operational amplifier, fixed resistance, controlling resistor, diode. The utility model discloses increase a circuit module who has the open circuit protection function on general semiconductor laser drive power supply's basis, restrained pulse current's when semiconductor laser opens a way and be closed in the twinkling of an eye production effectively, guaranteed semiconductor laser's safety.
Description
Art
The utility model relates to laser drive power technical field, especially relates to semiconductor laser drive power technical field.
Background technology
Semiconductor laser is the advantage such as wave-length coverage is wide, volume is little, long service life and being widely used because having.But the technical requirement of semiconductor laser to driving power is harshness very, as long as the current peak in laser loop exceedes its maximum current, chip of laser will permanently damage.The semiconductor laser drive power of linear transformation Theoretical Design general at present, comprises AC-DC change-over circuit, single chip machine controlling circuit, comparison circuit, drive circuit, current feedback circuit, current-limiting circuit, laser and protection device.Just have a kind of current-limiting function to the design in laser overcurrent protection, Current Limits can fix in the scope of setting when analog signal is modulated by this current-limiting function, serves certain defencive function.But when occurring that open circuit closes again instantaneously in semiconductor laser is because of the situation such as rosin joint, virtual connection, above-mentioned current-limiting function is just helpless, there will be the very high pulse current of a peak value in laser diode current loop in this case, laser occurs that the probability of permanent damage is very high.
Summary of the invention
The utility model adds a kind of circuit module with open circuit protecting function on the basis that general semiconductor laser drive power designs; when semiconductor laser occurs that open circuit closes again instantaneously; restrained effectively the generation of peak current, the safety of laser is served and effectively protects.
The scheme that the utility model adopts in its technical problem of solution is: general semiconductor laser drive power comprises AC-DC change-over circuit, single chip machine controlling circuit, comparison circuit, drive circuit, current feedback circuit, laser and protection device, current-limiting circuit.Feature of the present utility model is the increase in laser open loop protection circuit.Open loop protection circuit is connected with single chip machine controlling circuit, drive circuit.Open loop protection circuit comprises operational amplifier, fixed resistance, adjustable resistance, diode.The general principle realizing open-circuit-protection is: the core devices of drive circuit for laser is MOSFET (Metal-Oxide Semiconductor field-effect transistor); MOSFET is voltage-controlled device; as long as its coral pole tension is limited within the specific limits; drain-source current is just limited in certain scope; even if current peak also can not exceed limit value when semiconductor laser open circuit closes again instantaneously, achieve the safeguard protection to laser.
The beneficial effects of the utility model are: the generation that restrained effectively pulse current time closed instantaneously again after opening a way in the two poles of the earth line rosin joint of semiconductor laser, virtual connection and other situation, noise spectra of semiconductor lasers serves safeguard protection effect.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the utility model open loop protection circuit schematic diagram.
In figure, U1, U2 are operational amplifier, and U3 is D/A converter, and R1, R3, R4 are fixed resistance, and R2 is adjustable resistance, and D1 is diode, and Q1 is MOSFET.
Embodiment
In FIG, AC220V input, after AC-DC change-over circuit, is provide DC power supply to single chip machine controlling circuit on the one hand, is provide driving electric energy to drive circuit on the other hand.Single chip machine controlling circuit exports a road and arranges analog quantity to comparison circuit, and another road arranges analog quantity to open loop protection circuit.The analog quantity of output is added to the negative feedback end of comparison circuit by current feedback circuit.Analog quantity that what single-chip microcomputer provided by comparison circuit arranged and the analog quantity that current feedback circuit provides compare, and then export control voltage to the MOSFET of drive circuit.The positive pole of laser is connected with the output of AC-DC change-over circuit, and negative pole is connected with drive circuit.Current-limiting circuit is connected with drive circuit.Open loop protection circuit input is connected with single chip machine controlling circuit, and the other end is connected with drive circuit, to limit the grid voltage of the MOSFET of drive circuit, guarantees that laser diode current can exceed set point at no time, ensures the safety of laser.
In fig. 2, what single chip machine controlling circuit exported arranges the U1 that analog quantity is added to open loop protection circuit, and after impedance transformation, analog quantity is added on divider resistance R1, R2.Through the fine adjustment of adjustable resistance R2, then by analog input to U2.The analog quantity that U2 exports certain amplitude is connected with MOSFET (Q1) grid of drive circuit through D1, and the voltage magnitude that such MOSFET (Q1) grid ceiling voltage can export more than U2 at no time adds the conducting junction voltage of diode (D1).Ensure that the electric current in laser loop all can not exceed maximum set value under any state, effectively protect the safety of laser.
Claims (1)
1. one kind has the semiconductor laser driving power of open circuit protecting function; comprise AC-DC change-over circuit, single chip machine controlling circuit, comparison circuit, drive circuit, current feedback circuit, laser and protection device, current-limiting circuit; it is characterized in that: add laser open loop protection circuit; open loop protection circuit is connected with single chip machine controlling circuit, drive circuit, and open loop protection circuit comprises operational amplifier, fixed resistance, adjustable resistance, diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520698776.5U CN205039397U (en) | 2015-09-11 | 2015-09-11 | Semiconductor laser drive power supply with open circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520698776.5U CN205039397U (en) | 2015-09-11 | 2015-09-11 | Semiconductor laser drive power supply with open circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205039397U true CN205039397U (en) | 2016-02-17 |
Family
ID=55298268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520698776.5U Active CN205039397U (en) | 2015-09-11 | 2015-09-11 | Semiconductor laser drive power supply with open circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205039397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270791A (en) * | 2021-05-08 | 2021-08-17 | 武汉奇致激光技术股份有限公司 | Semiconductor laser power supply driving system |
-
2015
- 2015-09-11 CN CN201520698776.5U patent/CN205039397U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270791A (en) * | 2021-05-08 | 2021-08-17 | 武汉奇致激光技术股份有限公司 | Semiconductor laser power supply driving system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606895B (en) | A kind of overvoltage turn-off protection circuit | |
| CN105186444B (en) | A kind of power supply protection circuit | |
| CN102548073B (en) | IGBT (Insulated Gate Bipolar Transistor) drive circuit of electromagnetic induction heating equipment | |
| CN106384933A (en) | Semiconductor laser driving power supply possessing open circuit protection function | |
| CN201515223U (en) | Power supply output overvoltage protective circuit | |
| CN205039397U (en) | Semiconductor laser drive power supply with open circuit protection function | |
| CN204887411U (en) | Intelligence audio frequency drive circuit | |
| CN102969704A (en) | Pre-charging circuit | |
| CN202043053U (en) | Switching power supply with under-voltage protection function | |
| CN203747633U (en) | IGBT driving circuit | |
| CN204600762U (en) | A kind of constant output power circuit and apply the ultrasonic cavitron of this circuit | |
| CN204424877U (en) | A kind of IGBT module Over Current Protection System | |
| CN202495761U (en) | Capacitor constant power discharge circuit | |
| CN206135859U (en) | Pulse width modulation circuit based on TL494 chip | |
| CN204205929U (en) | A kind of high-performance module switch power circuit with overvoltage protection | |
| CN204598412U (en) | A kind of LED drive power soft starting circuit | |
| CN203800836U (en) | CS short circuit protection circuit for switch power supply | |
| CN204205955U (en) | Possesses the LED power of short-circuit protection function | |
| CN202455252U (en) | IGBT driving circuit of megawatt wind power converter | |
| CN202435636U (en) | IGBT drive circuit of electromagnetic induction heating equipment | |
| CN209267426U (en) | A kind of integrated multipurpose IGBT control driving device | |
| CN209545140U (en) | A kind of current foldback circuit and inverter of light-coupled isolation | |
| CN206442174U (en) | A kind of artificial tree solar power system circuit | |
| CN202524062U (en) | Overcurrent protection device for power factor correction | |
| CN101872967A (en) | IGBT (Insulated Gate Bipolar Transistor) breakdown protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Chengyan Document name: payment instructions |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Chengyan Document name: Notice of Termination of Patent Rights |
|
| DD01 | Delivery of document by public notice |