CN113078803B - Continuous power supply circuit of semiconductor laser - Google Patents
Continuous power supply circuit of semiconductor laser Download PDFInfo
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- CN113078803B CN113078803B CN202110495807.7A CN202110495807A CN113078803B CN 113078803 B CN113078803 B CN 113078803B CN 202110495807 A CN202110495807 A CN 202110495807A CN 113078803 B CN113078803 B CN 113078803B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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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Abstract
The invention discloses a semiconductor laser continuous power supply circuit which comprises a first power supply module, a second power supply module, a driving circuit and a linear power device, wherein two different voltages, namely a first voltage and a second voltage, can be obtained by arranging the two power supply modules, the first voltage is used for supplying power to the driving circuit, the second voltage is used for supplying power to the linear power device and a laser, and the second voltage is smaller than the first voltage, so that the difference between the power supply voltage of the linear power device and the working voltage of the laser can be greatly reduced, the power consumption of the linear power device is further reduced, the power supply efficiency of the laser is improved, and the heating of the laser power supply circuit is reduced.
Description
Technical Field
The invention relates to the field of power electronics, in particular to a semiconductor laser continuous power supply circuit.
Background
In the prior art, in order to ensure that a laser can output stable laser, a linear constant current source is generally used for providing a constant continuous current for the laser, and the linear constant current source and the laser use the same power supply voltage, so that under the condition, the conversion efficiency of the linear constant current source is lower and the heating is obvious. Specifically, when the linear constant current source is used to supply power to the laser, since the linear constant current source includes the driving circuit and the linear power device, and the operating voltage of the driving circuit is higher than the operating voltage of the laser, the output voltage (i.e., the supply voltage) of the power supply is not less than the voltage that the driving circuit can normally operate, and at this time, the linear power device consumes a voltage that is a difference portion between the output voltage of the power supply and the operating voltage of the laser. For example, when the output voltage of the power supply is 5V, that is, the supply voltage of the linear constant current source is 5V, and the working voltage of the laser is 2.2V, the voltage of 2.8V (5-2.2) is consumed on the linear power device, so that the efficiency of the linear constant current source is lower, the power consumption is larger, and the linear power device is easy to generate heat.
Disclosure of Invention
The invention aims to provide a semiconductor laser continuous power supply circuit which can greatly reduce the difference between the power supply voltage of a linear power device and the working voltage of a laser, thereby reducing the power consumption of the linear power device, improving the power supply efficiency of the laser and reducing the heating of the laser power supply circuit.
In order to solve the above technical problems, the present invention provides a continuous power supply circuit for a semiconductor laser, comprising:
the first power supply module is used for outputting a first voltage to supply power for the driving circuit;
the second power supply module is used for outputting a second voltage to supply power for the linear power device and the laser, and the second voltage is smaller than the first voltage;
the driving circuit is connected with the output end of the first power supply module at the power supply end and is used for sending a driving signal to the linear power device when the first voltage is received;
the power supply end is connected with the second power supply module, and the control end is connected with the linear power device of the output end of the driving circuit and is used for outputting constant current to enable the laser to work with the constant current when the second voltage and the driving signal are received.
Preferably, the driving circuit includes:
the current sampling module is connected with the output end of the linear power device and is used for collecting the output current of the linear power device;
the input end is connected with the output end of the current sampling module, and the output end is connected with the control end of the linear power device, and the control module is used for outputting a driving signal to the linear power device according to the difference value between the target current preset by a user and the output current so as to carry out closed-loop control on the output current of the linear power device.
Preferably, the driving circuit further comprises an amplifying module connected with the output end of the current sampling module, and the amplifying module is used for amplifying the output current to be within the input range of the control module.
Preferably, the current sampling module comprises a sampling resistor, wherein a first end of the sampling resistor is respectively connected with the output end of the linear power device and the input end of the control module, and a second end of the sampling resistor is grounded;
the control module is specifically configured to output the driving signal to the linear power device according to a difference value between a target voltage preset by a user and a voltage of an input end of the control module, so as to perform closed-loop control on an output current of the linear power device.
Preferably, the amplifying module comprises a first resistor, a second resistor and a first operational amplifier;
the first end of the first resistor is connected with the first input end of the first operational amplifier and the first end of the second resistor respectively, the other end of the first resistor is connected with the output end of the first operational amplifier, the second end of the second resistor is grounded, and the second input end of the first operational amplifier is connected with the first end of the sampling resistor.
Preferably, the control module is a second operational amplifier;
the first input end of the second operational amplifier is connected with the target voltage output device, the second input end of the second operational amplifier is connected with the output end of the current sampling module, and the output end of the second operational amplifier is connected with the control end of the linear power device.
Preferably, the linear power device is a controllable switch;
the first end of the controllable switch is connected with the output end of the second power supply module, the second end of the controllable switch is connected with the second end of the sampling resistor, and the control end of the controllable switch is connected with the output end of the driving circuit.
Preferably, the controllable switch is an NMOS, wherein a gate of the NMOS is a control terminal of the controllable switch, a source of the NMOS is a first terminal of the controllable switch, and a drain of the NMOS is a second terminal of the controllable switch.
Preferably, the first power supply module comprises a power supply module;
the second power supply module comprises a power supply conversion module, wherein one end of the power supply conversion module is connected with the output end of the power supply module, and the other end of the power supply conversion module is connected with the power supply end of the linear power device and is used for converting the first voltage into the second voltage so as to supply power for the linear power device.
Preferably, the method further comprises:
and the filtering module is connected with the output end of the power supply module and is used for filtering ripple waves in the power supply output by the power supply module.
The invention provides a semiconductor laser continuous power supply circuit, which comprises a first power supply module, a second power supply module, a driving circuit and a linear power device, wherein two different voltages, namely a first voltage and a second voltage, can be obtained by arranging the two power supply modules, the first voltage is used for supplying power to the driving circuit, the second voltage is used for supplying power to the linear power device and the laser, and the second voltage is smaller than the first voltage, so that the difference between the power supply voltage of the linear power device and the working voltage of the laser can be greatly reduced, the power consumption of the linear power device is further reduced, the power supply efficiency of the linear power device is improved, and the heating of the power supply circuit of the linear power source laser is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a semiconductor laser continuous power supply circuit according to the present invention;
FIG. 2 is a schematic diagram of a driving circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a filtering module according to the present invention.
Detailed Description
The invention provides a semiconductor laser continuous power supply circuit, which can greatly reduce the difference between the power supply voltage of a linear power device and the working voltage of a laser, further reduce the power consumption of the linear power device, thereby improving the power supply efficiency of the laser and reducing the heating of the laser power supply circuit.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a block diagram of a continuous power supply circuit of a semiconductor laser according to the present invention, the circuit includes:
a first power supply module 1 for outputting a first voltage to supply power to the driving circuit 5;
the second power supply module 2 is used for outputting a second voltage to supply power to the linear power device 3 and the laser 4, and the second voltage is smaller than the first voltage;
the driving circuit 5, the power supply end of which is connected with the output end of the first power supply module 1, is used for sending a driving signal to the linear power device 3 when receiving the first voltage;
the power supply end is connected with the second power supply module 2, and the control end is connected with the linear power device 3 of the output end of the driving circuit 5, and is used for outputting constant current to enable the laser 4 to work with constant current when receiving the second voltage and the driving signal.
The laser 4 in the prior art uses a linear constant current source to provide a constant current for the laser 4 so as to make the laser 4 stably work, wherein the linear constant current source comprises a driving circuit 5 and a linear power device 3, if the linear constant current source and the laser 4 are powered by the same power supply voltage, the working voltage of the laser 4 is greater than that of the linear constant current source, and at this time, the difference between the power supply voltage and the working voltage of the laser 4 is consumed on the linear power device 3, so that the power consumption of the linear power device 3 is greater, and the heat generation is serious.
For solving the technical problem, the design thought of the application is as follows: the driving circuit 5, the linear power device 3 and the laser 4 are respectively powered by different power supply voltages, so that the power consumption on the linear power device 3 is smaller, and the heating phenomenon is reduced.
Based on this, this application provides two kinds of power supply module, including first power supply module 1 and second power supply module 2 respectively, and the first voltage of first power supply module 1 output is greater than the second voltage of second power supply module 2 output, use first power supply module 1 to supply power for drive circuit 5, use second power supply module 2 to supply power for linear power device 3 and laser instrument 4, and can guarantee that linear power device 3 and laser instrument 4 can normally work, at this moment, can reduce the difference between the power supply voltage of linear power device 3 and the operating voltage of laser instrument 4, and then reduce the consumption of linear power device 3, thereby improve the efficiency of linear power device 3, reduce the heating of linear power source.
It should be noted that, the working voltage of the laser 4 in the present application may be, but not limited to, 2.2V, at this time, the second voltage may be, but not limited to, 2.6V, the first supply voltage may be, but not limited to, 5V, and through the semiconductor laser continuous power supply circuit in the present application, the voltage consumed on the linear power device 3 in the present application is reduced from 2.8V to 0.4V, thereby improving the efficiency of the linear power device 3 and reducing the heating phenomenon. The linear power device 3 in the present application may be, but not limited to, a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) transistor, and the control signal of the output of the driving circuit 5 needs to make the MOS transistor operate in a linear region at this time, so that the MOS transistor outputs a constant current.
In summary, the semiconductor laser continuous power supply circuit in the application reduces the difference between the power supply voltage of the linear power device 3 and the working voltage of the laser 4, and further reduces the power consumption of the linear power device 3, thereby improving the efficiency of the linear power device 3 and reducing the heat generation of the linear power source.
Based on the above embodiments:
as a preferred embodiment, the driving circuit 5 includes:
the current sampling module is connected with the output end of the linear power device 3 and is used for collecting the output current of the linear power device 3;
the input end is connected with the output end of the current sampling module, and the output end is connected with the control end of the linear power device 3, and the control module is used for outputting a driving signal to the linear power device 3 according to the difference value between the target current and the output current preset by a user so as to carry out closed-loop control on the output current of the linear power device 3.
In view of the fact that the laser 4 needs to be stably output when the laser 4 is operated, the control circuit output from the driving circuit 5 needs to stably output a constant current from the linear power device 3. In order to output stable constant current, the driving current in the present application is to perform closed-loop control on the constant current output by the linear power device 3, specifically, in the present application, the output current of the linear power device 3 is sampled, and then the control module outputs a driving signal according to the sampled current and the target current, where the driving signal can make the output current of the linear power device 3 stable at the target current, so as to keep the laser 4 stable.
It can be seen that when the driving circuit 5 includes a current sampling module and a control module, closed-loop control of the output current of the linear power device 3 is realized, so that the linear power device is kept stable, and the implementation manner is simple and reliable.
As a preferred embodiment, the driving circuit 5 further comprises an amplifying module connected to the output of the current sampling module for amplifying the output current into the input range of the control module.
Considering that the range of the output current of the linear power device 3 collected by the current sampling module may be relatively small, the current control accuracy may be reduced.
In order to solve the technical problem, the output end of the current sampling module is further provided with an amplifying module for amplifying the output current of the current sampling module, so that the control module can stably receive the output current of the linear power device 3 obtained by sampling of the current sampling module.
It can be seen that the amplification module in this embodiment can ensure stable control of the driving circuit 5 on the linear power device 3 and stable operation of the laser 4.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a driving circuit according to the present invention.
As a preferred embodiment, the current sampling module comprises a sampling resistor with a first end connected with the output end of the linear power device 3 and the input end of the control module respectively and a second end grounded;
the control module is specifically configured to output a driving signal to the linear power device 3 according to a difference between a target voltage preset by a user and a voltage at an input end of the control module, so as to perform closed-loop control on an output current of the linear power device 3.
Specifically, the current sampling module in the present application is a sampling resistor, and is configured to collect an output current of the linear power device 3, and convert the collected output current into a voltage through the resistor, and under the condition of the implementation manner, the control module specifically performs closed-loop control on the output current of the linear power device 3 according to the target output voltage and the output voltage of the sampling resistor, so that the output current of the linear power device 3 remains stable.
When the linear power device 3 is a MOS transistor, the driving signal is a voltage.
Of course, the current sampling module in the present application may be, but not limited to, a sampling resistor, or may be other implementation manners, as long as the output current of the linear power device 3 can be collected, and the present application is not limited herein.
It can be seen that when the current sampling module is a sampling resistor, sampling of the output current of the linear power device 3 can be achieved, and the control module can also perform closed-loop control on the output current of the linear power device 3 according to the output voltage of the sampling resistor.
As a preferred embodiment, the amplifying module includes a first resistor, a second resistor and a first operational amplifier;
the first end of the first resistor is connected with the first input end of the first operational amplifier and the first end of the second resistor respectively, the other end of the first resistor is connected with the output end of the first operational amplifier, the second end of the second resistor is grounded, and the second input end of the first operational amplifier is connected with the first end of the sampling resistor.
Specifically, when the amplifying module in the present application is the above implementation manner, the amplification factor= (first resistor+second resistor)/second resistor may adjust the resistance values of the first resistor and the second resistor according to the required amplification factor, so that the input range of the control module is satisfied. The type of the first operational amplifier is not particularly limited herein as long as the corresponding function can be realized.
Of course, the amplifying module in the present application may be, but not limited to, the above-mentioned implementation manner, or may be other implementation manners, which are not particularly limited herein.
Therefore, the signal output by the current sampling module can be amplified by the implementation mode, the resistance values of the first resistor and the second resistor can be adjusted according to the required amplification factor, and in addition, the cost of the resistor is lower, and the implementation mode is simpler.
As a preferred embodiment, the control module is a second operational amplifier;
the first input end of the second operational amplifier is connected with the target voltage output device, the second input end of the second operational amplifier is connected with the output end of the current sampling module, and the output end of the second operational amplifier is connected with the control end of the linear power device 3.
The present embodiment is directed to providing a specific implementation manner of the control module, specifically, the operational amplifier in the present embodiment may generate a driving signal according to the target voltage of the first output terminal and the voltage of the second output terminal, and when the linear power device 3 is a MOS transistor, the driving signal may be, but not limited to, a voltage signal, or may be another signal.
The type of the second operational amplifier in the present application is not particularly limited herein, and the power supply voltage of the second operational amplifier may be, but not limited to, 5V as long as the corresponding function can be achieved. Furthermore, the power supply terminal of the second operational amplifier may be, but not limited to, provided with two capacitors for filtering, wherein the first terminals of the two capacitors C1 and C2 are respectively connected to the output terminal of the second operational amplifier, and the second terminals are both grounded.
It should be noted that, a resistor may be connected between the output end of the second operational amplifier and the gate of the MOS transistor, so as to ensure the reliability of the power supply system.
Of course, the specific implementation of the control module is not limited to the above example, but may be other implementations, and the application is not specifically limited herein.
It can be seen that the above implementation manner can implement the function of the control module to control the linear power device 3, and the implementation manner is simple and reliable.
As a preferred embodiment, the linear power device 3 is a controllable switch;
the first end of the controllable switch is connected with the output end of the second power supply module 2, the second end of the controllable switch is connected with the second end of the sampling resistor, and the control end of the controllable switch is connected with the output end of the driving circuit 5.
As a preferred embodiment, the controllable switch is an NMOS (Negative-Metal-Oxide-Semiconductor Field-Effect Transistor, an N-channel-Metal-Oxide semiconductor field effect transistor), wherein the gate of the NMOS is the control terminal of the controllable switch, the source of the NMOS is the first terminal of the controllable switch, and the drain of the NMOS is the second terminal of the controllable switch.
The embodiment aims to provide a specific implementation manner of the linear power device 3, specifically, the linear power device 3 may be a controllable switch capable of outputting a constant current, and considering that the operating current of the MOS transistor is a constant current when the MOS transistor is operated in a linear region after being turned on, therefore, the controllable switch in the present application may be, but is not limited to, an NMOS transistor, the driving signal is a voltage signal, and the voltage signal and the power supply voltage (i.e., the second voltage) of the NMOS transistor make the NMOS transistor operate in the linear region after being turned on, that is, the NMOS transistor provides the constant current for the laser 4 at this time.
In addition, a zener diode is further arranged between the output end of the second power supply module 2 and the first end of the NMOS, wherein the anode of the zener diode is connected with the first end of the NMOS tube, and the cathode of the zener diode is respectively connected with the power supply end of the laser 4 and the output end of the second power supply module 2 for preventing external electrostatic interference, thereby avoiding unstable operation of the laser 4 due to external interference.
Of course, the specific implementation of the linear power device 3 in the present application is not limited to the above example, but may be other devices capable of outputting a constant current, which is not limited in the present application.
Therefore, the NMOS tube can realize the function of outputting constant current of the linear power device 3, and the realization mode is simple and reliable.
As a preferred embodiment, the first power supply module 1 comprises a power supply module;
the second power supply module 2 includes a power conversion module with one end connected to the output end of the power supply module and the other end connected to the power supply end of the linear power device 3, and is configured to convert the first voltage into a second voltage to supply power to the linear power device 3 and the laser 4.
Specifically, in order to reduce the use of the power supply module, the first power supply module 1 in the present application includes a power supply module for outputting a first voltage to supply power to the driving circuit 5, where the first voltage may be, but is not limited to, 5V, and the second power supply module 2 converts the first voltage output by the power supply module into a second voltage using a power conversion module to supply power to the laser 4 and the linear power device 3. The second voltage here may be, but is not limited to, 2.6V.
The specific implementation of the power conversion module in this embodiment is not particularly limited, so long as the first voltage can be converted into the second voltage, and the application is not limited.
The values of the first voltage and the second voltage are not limited to the above examples, and are not limited thereto.
In summary, the power supply module and the power conversion module in the embodiment can realize the functions of the first power supply module 1 and the second power supply module 2, and only one power supply module is needed, so that the range of the first voltage output by the power supply module can be increased, and the power supply module is not limited by the output voltage of the power supply module.
As a preferred embodiment, further comprising: and the filtering module is connected with the output end of the power supply module and is used for filtering ripple waves in the power supply output by the power supply module.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of a filtering module according to the present invention, wherein L2 and C8 form an LC filter circuit, and both C9 and C10 play a role in filtering.
In addition, a diode is further arranged between the output end of the power supply module and the input end of the filtering module, and is used for preventing energy stored in the capacitor from flowing backwards into the power supply module when the power supply module does not output power supply, so that the power supply module is prevented from being damaged.
Therefore, the filtering module can avoid the influence of ripple on the power supply system and improve the working stability of the power supply system.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A semiconductor laser continuous power supply circuit, comprising:
the first power supply module is used for outputting a first voltage to supply power for the driving circuit;
the second power supply module is used for outputting a second voltage to supply power for the linear power device and the laser, and the second voltage is smaller than the first voltage;
the driving circuit is connected with the output end of the first power supply module at the power supply end and is used for sending a driving signal to the linear power device when the first voltage is received;
the linear power device is connected with the output end of the driving circuit and is used for outputting constant current to enable the laser to work with the constant current when receiving the second voltage and the driving signal;
the driving circuit includes:
the current sampling module is connected with the output end of the linear power device and is used for collecting the output current of the linear power device;
the input end is connected with the output end of the current sampling module, and the output end is connected with the control end of the linear power device, and the control module is used for outputting a driving signal to the linear power device according to the difference value between the target current preset by a user and the output current so as to carry out closed-loop control on the output current of the linear power device.
2. A semiconductor laser continuous mode power supply circuit as in claim 1, wherein said drive circuit further comprises an amplifying module coupled to an output of said current sampling module for amplifying said output current into an input range of said control module.
3. The semiconductor laser continuous power supply circuit according to claim 2, wherein the current sampling module comprises a sampling resistor with a first end connected with the output end of the linear power device and the input end of the control module respectively, and a second end grounded;
the control module is specifically configured to output the driving signal to the linear power device according to a difference value between a target voltage preset by a user and a voltage of an input end of the control module, so as to perform closed-loop control on an output current of the linear power device.
4. A semiconductor laser continuous mode power supply circuit as in claim 3, wherein said amplifying means comprises a first resistor, a second resistor and a first operational amplifier;
the first end of the first resistor is connected with the first input end of the first operational amplifier and the first end of the second resistor respectively, the other end of the first resistor is connected with the output end of the first operational amplifier, the second end of the second resistor is grounded, and the second input end of the first operational amplifier is connected with the first end of the sampling resistor.
5. A semiconductor laser continuous mode power supply circuit as claimed in claim 3 wherein said control module is a second operational amplifier;
the first input end of the second operational amplifier is connected with the target voltage output device, the second input end of the second operational amplifier is connected with the output end of the current sampling module, and the output end of the second operational amplifier is connected with the control end of the linear power device.
6. A semiconductor laser continuous mode power supply circuit as claimed in claim 1 wherein the linear power device is a controllable switch;
the first end of the controllable switch is connected with the output end of the second power supply module, the second end of the controllable switch is connected with the second end of the current sampling module, and the control end of the controllable switch is connected with the output end of the driving circuit.
7. A semiconductor laser continuous mode power supply circuit as in claim 6, wherein said controllable switch is an NMOS, wherein a gate of said NMOS is a control terminal of said controllable switch, a source of said NMOS is a first terminal of said controllable switch, and a drain of said NMOS is a second terminal of said controllable switch.
8. A semiconductor laser continuous mode power supply circuit as claimed in any one of claims 1 to 7 wherein said first power supply module comprises a power supply module;
the second power supply module comprises a power supply conversion module, wherein one end of the power supply conversion module is connected with the output end of the power supply module, and the other end of the power supply conversion module is connected with the power supply end of the linear power device and is used for converting the first voltage into the second voltage so as to supply power for the linear power device.
9. A semiconductor laser continuous mode power supply circuit as in claim 8, further comprising:
and the filtering module is connected with the output end of the power supply module and is used for filtering ripple waves in the power supply output by the power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110495807.7A CN113078803B (en) | 2021-05-07 | 2021-05-07 | Continuous power supply circuit of semiconductor laser |
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|---|---|---|---|
| CN202110495807.7A CN113078803B (en) | 2021-05-07 | 2021-05-07 | Continuous power supply circuit of semiconductor laser |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000200941A (en) * | 1998-12-29 | 2000-07-18 | Konica Corp | Semiconductor laser drive circuit |
| CN110048605A (en) * | 2019-04-04 | 2019-07-23 | 上海空间电源研究所 | A kind of high power laser constant current source driving circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005268338A (en) * | 2004-03-16 | 2005-09-29 | Matsushita Electric Ind Co Ltd | Laser drive circuit |
| JP2006351945A (en) * | 2005-06-17 | 2006-12-28 | Ricoh Co Ltd | Semiconductor laser drive circuit |
| JP4772469B2 (en) * | 2005-11-18 | 2011-09-14 | ローム株式会社 | Semiconductor laser drive circuit, light emitting device, and disk device |
| JP2012243891A (en) * | 2011-05-18 | 2012-12-10 | Sony Corp | Semiconductor laser driving circuit and semiconductor laser device |
| CN104485577A (en) * | 2014-12-11 | 2015-04-01 | 中国科学院半导体研究所 | Rechargeable battery powered type driving power supply for portable quantum cascade laser |
| CN104600855B (en) * | 2014-12-30 | 2017-02-01 | 南京航空航天大学 | Laser driving power supply and method for realizing power signal composite transmission thereof |
| CN106209255B (en) * | 2016-06-16 | 2018-09-07 | 青岛海信宽带多媒体技术有限公司 | Optical module and its laser bias circuit Poewr control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000200941A (en) * | 1998-12-29 | 2000-07-18 | Konica Corp | Semiconductor laser drive circuit |
| CN110048605A (en) * | 2019-04-04 | 2019-07-23 | 上海空间电源研究所 | A kind of high power laser constant current source driving circuit |
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