CN216122214U - DC-DC laser constant current driving module and parallelly-connected output driving source composed of same - Google Patents
DC-DC laser constant current driving module and parallelly-connected output driving source composed of same Download PDFInfo
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- CN216122214U CN216122214U CN202122709712.9U CN202122709712U CN216122214U CN 216122214 U CN216122214 U CN 216122214U CN 202122709712 U CN202122709712 U CN 202122709712U CN 216122214 U CN216122214 U CN 216122214U
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Abstract
The utility model discloses a DC-DC laser constant current driving module and a parallel output driving source composed of the same, wherein the module comprises an AC/DC power supply, a control signal generation module, a signal isolation transmission module, a processor, three paths of BUCK modules, an input voltage sampling module, an auxiliary power supply, an output current sampling module, an output voltage sampling module, an EEPROM memory and a parallel selection switch; the DC-DC laser constant current driving source capable of being output in parallel comprises a plurality of paths of DC-DC laser constant current driving modules, wherein parallel selection switches of the DC-DC laser constant current driving modules are connected together to share the same AC/DC power supply and the same control signal generating module. When a single DC-DC laser constant current driving module can not meet the power of the laser pumping source, two or more DC-DC laser constant current driving modules are used in parallel, so that the current requirement of a client on a higher-power pumping source can be met.
Description
Technical Field
The utility model relates to a laser driving source, in particular to a DC-DC laser constant current driving module and a parallel output driving source composed of the same.
Background
The laser is a device capable of emitting laser, the semiconductor laser is one of the lasers, and the laser has the advantages of small volume, light weight, high power and low price, and can be widely applied to the fields of medical treatment, industrial manufacturing, communication and the like. With the development of technology, the power of the laser pump source is increased, and the power of the constant current drive source matched with the power is also required to be increased. Laser pumping sources of different manufacturers are different, and the special driving source designed and developed for each different pumping source cannot meet the current market demand.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: in order to solve the problems, the utility model provides a DC-DC laser constant current driving module and a parallel output driving source composed of the same, wherein the module adopts a 3-path BUCK staggered parallel technology to realize that the single-path power is maximized; the output of the modules is connected in parallel, so that the current requirement of a client on a higher-power pump source can be met; through communicating with the upper computer and writing the protection conditions such as input and output of a single module into the EEPROM, the quick adaptation among different customers can be met, and the customers can be helped to put products into the market more quickly.
The technical scheme of the utility model is as follows:
the DC-DC laser constant current driving module comprises an AC/DC power supply, a control signal generation module, a signal isolation transmission module, a processor, three paths of BUCK modules, an input voltage sampling module, an auxiliary power supply, an output current sampling module, an output voltage sampling module, an EEPROM memory and a parallel connection selection switch;
the AC/DC power supply is respectively connected with the input ends of the three paths of BUCK modules, and is also connected with the processor through the input voltage sampling module and the auxiliary power supply;
the control signal generation module is connected with the processor through the signal isolation transmission module, and the processor is respectively connected with the control ends of the three BUCK modules;
the output ends of the three BUCK modules are respectively connected with an external laser pumping source, and the laser pumping sources are respectively connected with the processor through an output current sampling module and an output voltage sampling module;
the EEPROM memory and the parallel selection switch are respectively connected with the processor, and the parallel selection switch is used for switching the DC-DC laser constant current driving module to operate in a single mode or in parallel.
Preferably, the phases of the driving signals among the three BUCK modules are respectively different by 120 degrees.
Preferably, the input voltage sampling module samples the input voltages of the three BUCK modules; the output current sampling module samples the output currents of the three BUCK modules; the output voltage sampling module is used for sampling the voltage output by the three BUCK modules; the three sampling modules respectively send sampling signals to the processor.
Preferably, the control signal generation module is a device for externally adjusting a current switch, a current magnitude and a pulse of the laser; the signal isolation transmission module establishes connection between the control signal and the processor through an optical coupler, an isolation operational amplifier or an isolation communication chip, and prestores various protection values in a memory EEPROM for use.
Preferably, the AC/DC power supply is a high-power stabilized power supply, and provides a maximum working voltage exceeding the semiconductor laser after being electrified.
Preferably, the processor firstly performs system self-check, determines whether the working mode, the load and the functions of the functional components are normal, receives an instruction of an external control signal, and provides three paths of PWM waves with a phase difference of 120 degrees for the three paths of BUCK modules respectively.
Preferably, the BUCK module comprises a fast high-voltage MOS transistor, a SiC diode, a power inductor and a filter capacitor, wherein a drain electrode of the fast high-voltage MOS transistor is connected with the AC/DC power output, a source electrode of the fast high-voltage MOS transistor is connected with a cathode of the SiC diode and the power inductor, an anode of the SiC diode is connected with a cathode of the AC/DC power output, and the other end of the power inductor is connected with the output filter capacitor.
Preferably, the processor adjusts the duty ratio according to the current feedback of the output current sampling module to stabilize the output current; the processor performs voltage limiting protection according to voltage feedback of the output voltage sampling module; the processor also performs various abnormal protections according to the information collected by the three sampling modules.
The DC-DC laser constant current driving source capable of being output in parallel comprises a plurality of paths of DC-DC laser constant current driving modules, wherein the input end and the input end of each path of DC-DC laser constant current driving module are connected in parallel, the output end of each path of DC-DC laser constant current driving module is connected in parallel, and the parallel selection switches of each path of DC-DC laser constant current driving module are connected together to share the same AC/DC power supply and the same control signal generating module.
Preferably, when a single DC-DC laser constant current driving module cannot meet the power of the laser pumping source, two or more DC-DC laser constant current driving modules are used in parallel.
The utility model has the advantages that:
the utility model provides a DC-DC laser constant current driving module and a parallel output driving source composed of the same, wherein the module adopts a 3-path BUCK staggered parallel technology and a multi-path synchronous rectification step-down alternate conduction working mode to realize that the single-path power is maximized; the output of the modules is connected in parallel, so that the current requirement of a client on a higher-power pump source can be met; through communicating with the upper computer and writing the protection conditions such as input and output of a single module into the EEPROM, the quick adaptation among different customers can be met, and the customers can be helped to put products into the market more quickly.
Drawings
The utility model is further described with reference to the following figures and examples:
FIG. 1 is a schematic block diagram of a DC-DC laser constant current driving module of the present invention;
FIG. 2 is a schematic diagram of a BUCK module in an embodiment;
fig. 3 is a schematic block diagram of a DC-DC laser constant current driving source capable of parallel output according to the present invention.
Detailed Description
Example (b):
as shown in fig. 1, the DC-DC laser constant current driving module of the present invention includes an AC/DC power supply, a control signal generating module, a signal isolation transmission module, a processor, a three-way BUCK module, an input voltage sampling module, an auxiliary power supply, an output current sampling module, an output voltage sampling module, an EEPROM memory, and a parallel selection switch; the AC/DC power supply is respectively connected with the input ends of the three paths of BUCK modules, and is also connected with the processor through the input voltage sampling module and the auxiliary power supply; the control signal generation module is connected with the processor through the signal isolation transmission module, and the processor is respectively connected with the control ends of the three BUCK modules; the output ends of the three BUCK modules are respectively connected with an external laser pumping source, and the laser pumping sources are respectively connected with the processor through an output current sampling module and an output voltage sampling module; the EEPROM memory and the parallel selection switch are respectively connected with the processor, and the parallel selection switch is used for switching the DC-DC laser constant current driving module to operate in a single mode or in parallel.
The AC/DC power supply is a high-power voltage-stabilized power supply and provides the maximum working voltage exceeding the semiconductor laser after being electrified. The auxiliary power supply provides power supply for modules such as a processor.
The processor is a core component of the whole module, a PIC16F1779 device of Microchip company is adopted in the embodiment, an 8-bit mcu processor and a power control chip capable of supporting analog output are integrated in the device, and not only software programming control but also hardware fast adjustment are supported. The processor firstly carries out system self-check, judges whether the work mode, the load and the functions of all functional components are normal or not, receives an instruction of an external control signal, and provides three paths of PWM waves with phase difference of 120 degrees for the three paths of BUCK modules respectively.
The BUCK module is a main power device of the whole module, and as shown in fig. 2, the BUCK module comprises a fast high-voltage MOS transistor Q1, a SiC diode D1, a power inductor L1 and a filter capacitor C1, the drain of the fast high-voltage MOS transistor Q1 is connected with an AC/DC power output, the source is connected with the cathode of a SiC diode D1 and a power inductor L1, the anode of the SiC diode D1 is connected with the negative electrode of the AC/DC power output, and the other end of the power inductor L1 is connected with an output filter capacitor C1.
The synchronous BUCK module chops input voltage through the on and off of a fast high-voltage MOS tube Q1 and the follow current of a SiC diode D1, outputs pulse waves with certain frequency and duty ratio, and becomes smooth direct-current voltage for the load semiconductor laser module after passing through a power inductor L1 and a filter capacitor C1. The phases of the driving signals among the three BUCK modules are different by 120 degrees respectively, so that the three BUCK inductive currents are conducted in a staggered mode, and a staggered conduction working mode is realized.
The input voltage sampling module samples the input voltages of the three BUCK modules; the output current sampling module samples the output currents of the three BUCK modules; the output voltage sampling module is used for sampling the voltage output by the three BUCK modules; the three sampling modules respectively send sampling signals to the processor. The processor regulates the duty ratio according to the current feedback of the output current sampling module to stabilize the output current; the processor performs voltage limiting protection according to voltage feedback of the output voltage sampling module; the processor also performs various abnormal protections according to the information collected by the three sampling modules.
The control signal generation module is a device for regulating the current switch, the current magnitude and the pulse of the laser from the outside and supports communication modes such as pulse, simulation or 232. The signal isolation transmission module establishes connection between the control signal and the processor through an optical coupler, an isolation operational amplifier or an isolation communication chip, and prestores various protection values in a memory EEPROM for use.
As shown in fig. 3, the DC-DC laser constant current driving source capable of parallel output according to the present invention includes a plurality of DC-DC laser constant current driving modules, wherein the input end and the output end of each DC-DC laser constant current driving module are connected in parallel, and the output end of each DC-DC laser constant current driving module are connected in parallel, and the parallel selection switches of each DC-DC laser constant current driving module are connected together by a wire, and share the same AC/DC power supply and the same control signal generating module.
The parallel selection switch needs to be adjusted to a single-machine mode when the single-module operates. When a single DC-DC laser constant current driving module can not meet the power of a laser pumping source, two or more DC-DC laser constant current driving modules are used in parallel. And the output ends of the driving source modules are connected with a laser pumping source.
The purpose that the parallel switches are connected together is to realize the synchronization of current control signals and avoid the asynchronous current output among modules caused by the optical coupling delay.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the utility model are covered in the protection scope of the utility model.
Claims (4)
- The DC-DC laser constant current driving module is characterized by comprising an AC/DC power supply, a control signal generation module, a signal isolation transmission module, a processor, three BUCK modules, an input voltage sampling module, an auxiliary power supply, an output current sampling module, an output voltage sampling module, an EEPROM memory and a parallel selection switch;the AC/DC power supply is respectively connected with the input ends of the three paths of BUCK modules, and is also connected with the processor through the input voltage sampling module and the auxiliary power supply;the control signal generation module is connected with the processor through the signal isolation transmission module, and the processor is respectively connected with the control ends of the three BUCK modules;the output ends of the three BUCK modules are respectively connected with an external laser pumping source, and the laser pumping sources are respectively connected with the processor through an output current sampling module and an output voltage sampling module;the EEPROM memory and the parallel selection switch are respectively connected with the processor, and the parallel selection switch is used for switching the DC-DC laser constant current driving module to operate in a single mode or in parallel.
- 2. The DC-DC laser constant current driving module according to claim 1, wherein the phases of the driving signals of the three BUCK modules are respectively different by 120 °.
- 3. The DC-DC laser constant current driving module set according to claim 1, wherein the BUCK module set comprises a fast high voltage MOS tube, a SiC diode, a power inductor and a filter capacitor, a drain electrode of the fast high voltage MOS tube is connected with an AC/DC power output, a source electrode of the fast high voltage MOS tube is connected with a cathode of the SiC diode and the power inductor, an anode of the SiC diode is connected with a cathode of the AC/DC power output, and the other end of the power inductor is connected with the output filter capacitor.
- 4. The DC-DC laser constant current driving source capable of being output in parallel is characterized by comprising a plurality of paths of DC-DC laser constant current driving modules according to any one of claims 1 to 3, wherein the input end and the output end of each path of DC-DC laser constant current driving module are connected in parallel, the output end and the output end of each path of DC-DC laser constant current driving module are connected in parallel, and the parallel selection switches of each path of DC-DC laser constant current driving module are connected together to share the same AC/DC power supply and the same control signal generating module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122709712.9U CN216122214U (en) | 2021-11-08 | 2021-11-08 | DC-DC laser constant current driving module and parallelly-connected output driving source composed of same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122709712.9U CN216122214U (en) | 2021-11-08 | 2021-11-08 | DC-DC laser constant current driving module and parallelly-connected output driving source composed of same |
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| Publication Number | Publication Date |
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| CN216122214U true CN216122214U (en) | 2022-03-22 |
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| CN202122709712.9U Active CN216122214U (en) | 2021-11-08 | 2021-11-08 | DC-DC laser constant current driving module and parallelly-connected output driving source composed of same |
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2021
- 2021-11-08 CN CN202122709712.9U patent/CN216122214U/en active Active
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