CN109524876A - A kind of program control type impedance self-adaptive laser diode drive module - Google Patents
A kind of program control type impedance self-adaptive laser diode drive module Download PDFInfo
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Abstract
本发明的一种程控式阻抗自适应激光二极管驱动模块属于电子设备的技术领域，主要结构有单片机模块(1)、数模转换模块(2)、功率输出模块(3)、负载判断模块(4)、延时补偿模块(5)、电压跟踪模块(6)和断电保护模块(8)等。本发明在工作时能够主动适应负载的变化，具有效率高、负载适应范围宽、安全性高、可靠性高等优点。
A program-controlled impedance adaptive laser diode driving module of the present invention belongs to the technical field of electronic equipment, and mainly comprises a single-chip microcomputer module (1), a digital-to-analog conversion module (2), a power output module (3), and a load judgment module (4). ), a delay compensation module (5), a voltage tracking module (6), a power failure protection module (8), and the like. The invention can actively adapt to the change of the load during operation, and has the advantages of high efficiency, wide load adaptation range, high safety and high reliability.
Description
Technical field
The invention belongs to the technical fields of electronic equipment.In particular to a kind of program control type impedance self-adaptive laser diode drives
Dynamic model block.
Background technique
The advantages that optical fiber laser is high-efficient with its, good heat dissipation, good beam quality, structure are simple, small in size, light weight quilt
It is widely used in the fields such as national defence, military project, high-precision industrial processes.Optical fiber laser basic composition is pumping source, fiber gain
Medium and optical resonator.Wherein pumping source is the most basic component of entire fiber ring laser system, to fiber ring laser system
Overall performance have an important influence.Pumping source is mainly by high power semiconductor laser diode and driving and controlling circuits structure
At since semiconductor laser diode is a kind of high power density and with the device of high quantum efficiency, for surge
Ability to bear is poor, and the minor change of driving current will lead to output performance parameter (such as excitation wavelength, noiseproof feature, mode
Bounce) and Output optical power very big variation, these variation directly affects pumping source export laser quality.Therefore, in reality
The driving and controlling circuits of noise spectra of semiconductor lasers have high requirement in.Specifically, to driving and controlling circuits
Major requirement it is as follows: 1, the stability of driving current wants high；2, have and power on surge protection, overcurrent protection, overtemperature prote etc.
Perfect safeguard measure；3, efficiency wants high, and in one timing of electro-optical efficiency of laser diode, driver own efficiency can shadow
The whole efficiency of entire Optical Maser System is rung, therefore internal drive loss wants as small as possible；4, since laser diode passes through
Often worked with array manner, thus its equivalent impedance be it is uncertain, when the equivalent impedance of laser array changes, drive
Dynamic device is wanted actively adapt to the variation of load.
With the immediate prior art of the application be Patent No. ZL200710056012.6 Chinese patent " it is high-power swash
Optical diode driver " (this seminar earlier application).The patent is non-linear using final stage field-effect tube (also referred to as metal-oxide-semiconductor)
Feature keeps the stability of output driving current big using profound and negative feedbck technology by the way that output electric current is sampled and is fed back
It is big to improve, meanwhile, which also achieves the functions such as soft start protection, current-limiting protection.
But there is also shortcomings for the scheme in above-mentioned patent:
Firstly, driver load adaptability disclosed in ZL200710056012.6 is poor.When the laser diode driven
The equivalent impedance of (or array) will lead to final stage control electric current output metal-oxide-semiconductor when increasing enters saturation region, and then leads to maximum
Output electric current declines rapidly, cannot keep constant current driving；And when load equivalent impedance reduces Shi Zehui, to enter metal-oxide-semiconductor under-voltage
Area's (because load is small, the voltage that load both ends generate is also small, referred to as under-voltage in the art), since metal-oxide-semiconductor and load exist together
In one series loop, and metal-oxide-semiconductor is nonlinear device, therefore to cause metal-oxide-semiconductor to automatically take on circuit more for the reduction of load voltage
Remaining voltage, and then the internal power consumption of metal-oxide-semiconductor is caused to steeply rise, and this power consumption belongs to " by-product " of driver, to being
System hundred is harmful and none is sharp: the increase of one side pipe power consumption can be such that tube temperature sharply increases and increase the risk (drop that pipe is burnt out
The service life of low instrument), on the other hand cannot adjust power supply in time when the load leads to the effect of entire driver
Rate is greatly lowered, and causes the waste of power, this is very unfavorable when Optical Maser System is used for mobile device.Because
When working on mobile platform, in order to guarantee the cruise duration of system, efficiency is often the Xiang Zhibiao for needing emphasis to consider.
Secondly, ZL200710056012.6 does not have the defencive function of overcurrent power-off and overtemperature power-off, once current limliting module is lost
It will lead to the risk that output driving current is more than safe current when effect, cause the damage of driven laser diode.
To sum up, existing laser diode actuation techniques also need further perfect.
Summary of the invention
The technical problem to be solved by the present invention is to, for disadvantage of the existing technology, provide one kind can impedance it is adaptive
The laser diode drive answered, when the equivalent impedance of the laser diode or diode laser matrix that are driven changes
When, the parameter of internal drive can be automatically adjusted, to adapt to the impedance variations of load, keeps high efficiency, and it is disconnected to have overcurrent
The multiple security protections function such as electricity and overtemperature power-off.
Specific technical solution of the invention is:
A kind of program control type impedance self-adaptive laser diode drive module, structure have front panel 15, program control module 10, monolithic
Machine module 1, D/A converter module 2, power output module 3, analog-to-digital conversion module 11, soft-start module 12 and power management module
14；It is characterized in that, there are also load judgment module 4, delay compensation module 5, voltage tracking module 6, overcurrent judgment modules for structure
7, power failure protection module 8, overtemperature judgment module 9 and reference voltage module 13；Wherein, single-chip microcontroller 1 respectively with program control module 10, mould
Number conversion module 11, D/A converter module 2 are connected, and D/A converter module 2 is connected with power output module 3, soft-start module 12
It is connected with power output module 3, power output module 3 judges with analog-to-digital conversion module 11, load judgment module 4, overcurrent respectively
Module 7 is connected, and reference voltage module 13 is connected with load judgment module 4, and load judgment module 4 is connected with delay compensation module 5,
Delay compensation module 5 is connected with voltage tracking module 6, and voltage tracking module 6 is connected with power output module 3, and overcurrent judges mould
Block 7, overtemperature judgment module 9 are connected with power failure protection module 8, power failure protection module 8 respectively with power output module 3 and voltage
Tracking module 6 is connected；Power management module 14 is the circuit that mains AC can be converted into DC voltage, is provided for each module
Tri- kinds of DC voltages of Vcc, Vcc/2, Vdd；
The structure of the power output module 3 are as follows: one end of the switch of relay EK1 is as power output module 3
First input terminal, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and the as power output module 3
One output end is denoted as port PWR-out1, and a termination power Vdd of the coil of relay EK1, the other end is as power output
Second input terminal of module 3 is denoted as port PWR-in2, and the grid of field-effect tube Q1 is connected with the output end of amplifier U1A, source
Second output end of the pole as power output module 3, is denoted as port PWR-out2, and a termination amplifier U1A's of resistance R1 is same
Phase input terminal, and the third input terminal as power output module 3 are denoted as port PWR-in3, the other end conduct of resistance R1
4th input terminal of power output module 3, is denoted as port PWR-in4, is connected with the input terminal of D/A converter module 2, amplifier
The inverting input terminal of U1A is connected with one end of one end of capacitor C1 and resistance R2, the output of the other end and amplifier U1A of capacitor C1
End is connected, the output of one end, the end of slide wire and amplifier U1B of slide rheostat W1 of the other end and slide rheostat W1 of resistance R2
End is connected, and the other end of slide rheostat W1 is connected with one end of resistance R3, and the reverse phase of the other end and amplifier U1B of resistance R3 is defeated
Enter end to be connected with one end of resistance R4, the other end ground connection of resistance R4, the non-inverting input terminal and one end phase of resistance Rs of amplifier U1B
Connect, and the third output end as power output module 3, is denoted as port PWR-out3, the other end ground connection of resistance Rs；
The structure of the load judgment module 4 are as follows: the non-inverting input terminal of amplifier U2A as load judgment module 4
One input terminal, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module 3, the reverse phase of amplifier U2A is defeated
Enter end to be connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and one end of resistance R6 and amplifier U3A
Non-inverting input terminal be connected, the other end of resistance R6 ground connection, the one of the output end of amplifier U3A and one end of resistance R8 and resistance R9
End be connected, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, the other end of resistance R7 and
The inverting input terminal of amplifier U2B is connected with the output end of amplifier U2B, and the non-inverting input terminal of amplifier U2B is as load judgment module 4
Second input terminal, be denoted as port Vjdg-in2, be connected with the port PWR-out2 of power output module 3, resistance R9's is another
One end is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination power Vcc/2 of resistance R10, amplifier
The output end of U3B is connected with one end of resistance R12, and the output end as load judgment module 4, is denoted as port Vjdg-out,
It is connected with the input terminal of delay compensation module 5, one end phase of the other end of resistance R12 and the inverting input terminal of amplifier U3B and R11
Even, the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, and amplifier U4B's is same mutually defeated
Enter end to be connected with the end of slide wire of slide rheostat W2, one end ground connection of slide rheostat W2, the other end is as load judgment module 4
Third input terminal, be denoted as port Vjdg-in3, be connected with the output end of reference voltage module 13；
The structure of the reference voltage module 13 are as follows: a termination power Vcc of resistance R51, the other end and two pole of pressure stabilizing
The cathode of pipe D6 is connected with one end of slide rheostat W6, the anode of zener diode D6 and another termination of slide rheostat W6
The end of slide wire on ground, slide rheostat W6 is connected with the non-inverting input terminal of amplifier U7B, the inverting input terminal and amplifier U7B of amplifier U7B
Output end be connected, and the output end of module 13 as the reference voltage is denoted as port Vref-out, with load judgment module 4
Port Vjdg-in3 is connected；
The structure of the delay compensation module 5 are as follows: one end of resistance R13 is connected with one end of resistance R18, and as prolonging
When compensating module 5 input terminal, be denoted as port Vdly-in, be connected with the port Vjdg-out of load judgment module 4, resistance R13
The other end be connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal of amplifier U4A and resistance R14
One end be connected, another termination power Vcc/2 of resistance R14, the output end and resistance of the other end of resistance R15 and amplifier U4A
One end of R16 is connected, the other end of resistance R16 and one end, one end of resistance R21 and the anti-phase input of amplifier U5A of resistance R17
End is connected, and the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module 5, is denoted as
Port Vdly-out is connected with second input terminal of voltage tracking module 6, and the non-inverting input terminal of amplifier U5A is with resistance R22's
One end is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and one end, the capacitor C2 of resistance R20
One end be connected with the output end of amplifier U5B, the anti-phase input of the other end of the other end of resistance R20 and capacitor C2, amplifier U5B
The other end of end and resistance R18 are connected, the non-inverting input terminal of a termination amplifier U5B of resistance R19, another termination Vcc/2；
The structure of the voltage tracking module 6 is termination power Vcc/2 of resistance R23, the other end and amplifier U6A
Reverse input end be connected, the non-inverting input terminal of amplifier U6A is connected with one end of one end of resistance R24, resistance R25, resistance R24
The other end be connected with the output end of amplifier U6A, the other end of resistance R25 is connected with the output end of amplifier U6B, resistance R26's
One end is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B；One end of resistance R27 and amplifier
The noninverting input of U6B is connected, another termination power Vcc/2；One end of capacitor C3 and one end of resistance R28 are with amplifier U6B's
Reverse input end is connected, and the other end is connected with the output end of amplifier U6B, one end phase of the output end and resistance R29 of amplifier U6B
Even, the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and first input as voltage tracking module 6
End, is denoted as port Vflw-in1, is connected with second output end of power failure protection module 8；One end of resistance R30 and amplifier U7A
Noninverting input be connected, second input terminal of the other end as voltage tracking module 6 is denoted as port Vflw-in2, and prolongs
When compensating module 5 port Vdly-out be connected；One end of resistance R31 is connected with the reverse input end of amplifier U7A, another termination
Power Vcc/2；The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects power Vcc, source
Pole connects one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end and electrolytic capacitor of inductance L1
The anode of C4, the anode of electrolytic capacitor C5, one end of capacitor C6, one end of capacitor C7 are connected, and as voltage tracking module 6
Output end, be denoted as port Vflw-out, be connected with the port PWR-in1 of power output module 3；The cathode of electrolytic capacitor C4,
The other end of the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 is grounded；
The structure of the overcurrent judgment module 7 is that the noninverting input of amplifier U9A is as the defeated of overcurrent judgment module 7
Enter end, is denoted as port OC-in, is connected with the port PWR-out3 of power output module 3；One end of resistance R35 is with amplifier U9A's
Reverse input end is connected, other end ground connection；One end of resistance R36 is connected with the reverse input end of amplifier U9A, the other end and sliding
One end of rheostat W3 is connected；The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A and amplifier U9B's is same
It is connected to input terminal；A termination power Vdd of slide rheostat W4, other end ground connection, the reversed input of end of slide wire and amplifier U9B
End is connected；Output end of the output end of amplifier U9B as overcurrent judgment module 7, is denoted as port OC-out, with power failure protection module
An input terminal be connected；
The structure of the power failure protection module 8 is that two input terminals of NAND gate U8A are respectively as power failure protection module
8 two input terminals, are denoted as port BRK-in1 and port BRK-in2, and respectively with the output end of overcurrent judgment module 7, overtemperature
The output end of judgment module 9 is connected, and an input terminal of the output termination NAND gate U8B of NAND gate U8A, NAND gate U8B's is another
The output end of one input termination NAND gate U8C, an input terminal and field effect of the output termination NAND gate U8C of NAND gate U8B
Should pipe Q3 grid, NAND gate U8C another input termination capacitor C8 one end and resistance R33 one end, resistance R33's is another
One end of one termination switch K1 and one end of resistance R32, another termination power Vdd of resistance R32, the other end and electricity of switch K1
The other end for holding C8 is grounded；The source electrode of field-effect tube Q3 is grounded, one end of resistance R34 as power failure protection module 8 first
A output end is denoted as port BRK-out1, and is connected with the port PWR-in2 of power output module 3, the other end of resistance R34
The drain electrode of field-effect tube Q3, and second output end as power failure protection module 8 are connect, port BRK-out2, port are denoted as
BRK-out2 is connected with the port Vflw-in1 of the port PWR-in3 of power output module 3 and voltage tracking module 6 simultaneously；
The structure of the overtemperature judgment module 9 is that the cathode of zener diode D2 meets power supply Vdd, and anode connects amplifier
The non-inverting input terminal of U10B, inverting input terminal and one end of capacitor C9, one end of resistance R38 and the diode Q4 of amplifier U10B
Emitter-base bandgap grading is connected, the output end of another termination amplifier U10B of another termination power Vdd of resistance R38, capacitor C9 and resistance R39's
One end, the base stage of another termination triode Q4 of resistance R39, the inverting input terminal phase of the collector and amplifier U10A of triode Q4
Even, an and input terminal as overtemperature judgment module 9, is denoted as port OT-in1, and one end of resistance R37 is same with amplifier U10B's
Phase input terminal is connected, another input terminal of the other end as overtemperature judgment module 9 is denoted as port OT-in2, port OT-in1,
Port OT-in2 is connected with two terminals of the thermistor input port 1411 in front panel 15 respectively；Slide rheostat W5's
One end is connected with power supply Vdd, and other end ground connection, end of slide wire is connected with the noninverting input of amplifier U10A；The output of amplifier U10A
The output end as overtemperature judgment module 9 is held, OT-out is denoted as, is connected with another input terminal of power failure protection module 8.
The structure of the front panel 15 includes: RS232 interface 151, power switch 152, start switch 153, reset by
Button 154, current output interface 155, thermistor input interface 156.
In a kind of program control type impedance self-adaptive laser diode drive module of the invention, the power Vcc, power supply
Vcc/2, power supply Vdd distinguish preferred 48V, 24V and 5V.
In a kind of program control type impedance self-adaptive laser diode drive module of the invention, the delay compensation module
5 circuit parameter is preferably as follows: resistance R13, R14 4K, R15 40K, R16, R21 20K, R17, R20 10K, R18,
R19 is 1K, and R22 5.1K, capacitor C2 are 5PF.
The utility model has the advantages that
1, the present invention is cooperated using load judgment module, delay compensation module and voltage tracking module, realizes driving
Device is to the adaptive of load impedance, so that load impedance is in wide variation, driver can safe and stable, efficiently work
Make.
2, the present invention is in design (calculated) load judgment module, and using special non-destructive testing technology, neither influencing, power is defeated
The output electric current of module does not influence to realize effective judgement to load variation under the premise of actual loading again out.
3, the present invention have power-off protection function, by output electric current and laser. operating temperature double monitoring, when
It is more than rapid rupturing duty output mould after safe temperature that electric current, which is exported, more than the operating temperature of preset safety value or laser
The current supply circuit of block, and the control signal of power output module and voltage tracking module is locked to 0 simultaneously, it realizes to system
Multi-faceted protection, substantially increase the safety of system.
4, power-off protection of the invention uses unidirectional trigger mechanism, once power-off protection is triggered, after needing debugging
Hand-reset could normally export electric current, to prevent power failure protection module perseveration near safety value, further improve
The safety of system.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is front panel schematic layout pattern of the invention.
Fig. 3 is the schematic diagram of power output module 3 of the invention.
Fig. 4 is the schematic diagram of load judgment module 4 of the invention.
Fig. 5 is the schematic diagram of delay compensation module 5 of the invention.
Fig. 6 is the schematic diagram of voltage tracking module 6 of the invention.
Fig. 7 is the schematic diagram of overcurrent judgment module 7 of the invention.
Fig. 8 is the schematic diagram of power failure protection module 8 of the invention.
Fig. 9 is the schematic diagram of overtemperature judgment module 9 of the invention.
Figure 10 is the schematic diagram of soft-start module 12 of the invention.
Figure 11 is the schematic diagram of reference voltage module 13 of the invention.
Specific embodiment
The working principle of the invention is described further below by specific embodiment, parameter marked in attached drawing is
The preferred parameter that each embodiment is selected, rather than the limitation of the protection scope to this patent.
The overall structure of the invention of embodiment 1
Overall structure of the invention is as shown in Figure 1, a kind of program control type impedance self-adaptive laser diode drive module, structure
Have one-chip computer module 1, D/A converter module 2, power output module 3, load judgment module 4, delay compensation module 5, voltage with
Track module 6, overcurrent judgment module 7, power failure protection module 8, overtemperature judgment module 9, program control module 10, analog-to-digital conversion module 11,
Soft-start module 12, reference voltage module 13, power management module 14 and front panel 15；Wherein, single-chip microcontroller 1 respectively with program-controlled mould
Block 10, analog-to-digital conversion module 11, D/A converter module 2 are connected, and D/A converter module 2 is connected with power output module 3, soft start
Module 12 is connected with power output module 3, power output module 3 respectively with analog-to-digital conversion module 11, load judgment module 4, mistake
It flows judgment module 7 to be connected, reference voltage module 13 is connected with load judgment module 4, load judgment module 4 and delay compensation module
5 are connected, and delay compensation module 5 is connected with voltage tracking module 6, and voltage tracking module 6 is connected with power output module 3, overcurrent
Judgment module 7, overtemperature judgment module 9 are connected with power failure protection module 8, power failure protection module 8 respectively with power output module 3
It is connected with voltage tracking module 6；Power management module 14 is the circuit that mains AC can be converted into DC voltage, is each mould
Block provides tri- kinds of DC voltages of Vcc, Vcc/2, Vdd.
The power output module of the invention of embodiment 2
The basic circuit diagram of the power output module 3 as shown in figure 3, one end of the switch of relay EK1 as function
First input terminal of rate output module 3, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and as power
First output end of output module 3, is denoted as port PWR-out1, a termination power Vdd of the coil of relay EK1, another
Second input terminal as power output module 3 is held, is denoted as port PWR-in2, the grid of field-effect tube Q1 is with amplifier U1A's
Output end is connected, and second output end of the source electrode as power output module 3 is denoted as port PWR-out2, one end of resistance R1
The non-inverting input terminal of amplifier U1A, and the third input terminal as power output module 3 are connect, port PWR-in3, resistance are denoted as
Four input terminal of the other end of R1 as power output module 3, is denoted as port PWR-in4, defeated with D/A converter module 2
Enter end be connected, the inverting input terminal of amplifier U1A is connected with one end of one end of capacitor C1 and resistance R2, the other end of capacitor C1 and
The output end of amplifier U1A is connected, one end of the other end of resistance R2 and slide rheostat W1, the end of slide wire of slide rheostat W1 and
The output end of amplifier U1B is connected, and the other end of slide rheostat W1 is connected with one end of resistance R3, the other end and fortune of resistance R3
The inverting input terminal for putting U1B is connected with one end of resistance R4, the other end of resistance R4 ground connection, the non-inverting input terminal of amplifier U1B with
One end of resistance Rs is connected, and the third output end as power output module 3, is denoted as port PWR-out3, resistance Rs's
Other end ground connection.
Power output module 3 converts voltage to corresponding output electricity under the control for the voltage that digital analog converter 2 exports
Stream is extremely loaded by the output of current output interface 155 of front panel 15.
The load judgment module of the invention of embodiment 3
The schematic circuit of the load judgment module 4 is as shown in figure 4, the non-inverting input terminal of amplifier U2A is sentenced as load
First input terminal of disconnected module 4, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module 3, amplifier
The inverting input terminal of U2A is connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and the one of resistance R6
End is connected with the non-inverting input terminal of amplifier U3A, the other end ground connection of resistance R6, the output end of amplifier U3A and one end of resistance R8
It is connected with one end of resistance R9, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, resistance
The other end of R7 is connected with the output end of the inverting input terminal of amplifier U2B and amplifier U2B, the non-inverting input terminal conduct of amplifier U2B
Second input terminal of load judgment module 4, is denoted as port Vjdg-in2, the port PWR-out2 phase with power output module 3
Even, the other end of resistance R9 is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination electricity of resistance R10
The output end of source Vcc/2, amplifier U3B are connected with one end of resistance R12, and the output end as load judgment module 4, are denoted as holding
Mouthful Vjdg-out, is connected with the input terminal of delay compensation module 5, the other end of resistance R12 and the inverting input terminal of amplifier U3B and
One end of R11 is connected, and the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, amplifier
The non-inverting input terminal of U4B is connected with the end of slide wire of slide rheostat W2, and one end ground connection of slide rheostat W2, the other end is as negative
The third input terminal for carrying judgment module 4, is denoted as port Vjdg-in3, is connected with the output end of reference voltage module 13.
When the load that the present invention is driven changes, since present invention output is constant current, load two will lead to
End voltage changes, and the field-effect tube in power output module 3 itself is shared since its non-linear behavior can then adjust
Voltage, therefore (i.e. power is defeated by port Vjdg-in1, Vjdg-in2 detection both ends field-effect tube Q1 for the load judgment module 4
Port PWR-out1 and PWR-out2 in module 3 out) voltage change realize to load variation judgement: load become larger when,
It loads both end voltage to increase, and then the voltage at the both ends Q1 becomes smaller；When load becomes smaller, load both end voltage becomes smaller, Q1 both end voltage
Then become larger.Since Q1 and load are in together in an output loop, flow through the electric current of Q1 minor change can all influence it is defeated
The stability of the electric current extremely loaded out, therefore requirement cannot influence to flow through the electricity of Q1 as far as possible when detecting on Q1 both end voltage
Stream, load judgment module 4 of the invention had both guaranteed that the detection to Q1 both end voltage reached using the design of high impedance non-destructive testing
Very high degree of precision, and guarantee not influence to flow through the electric current of Q1 completely when detection voltage.The voltage at the both ends Q1 detected and port
Reference voltage (coming from reference voltage module 13) at Vjdg-in3 is compared and asks poor, and difference determines rear class voltage-tracing
The module voltage to be adjusted.
The reference voltage module of the invention of embodiment 4
The schematic circuit of the reference voltage module 13 is as shown in figure 11, a termination power Vcc of resistance R51, another
End is connected with one end of the cathode of zener diode D6 and slide rheostat W6, the anode and slide rheostat of zener diode D6
The other end of W6 is grounded, and the end of slide wire of slide rheostat W6 is connected with the non-inverting input terminal of amplifier U7B, and the reverse phase of amplifier U7B is defeated
Enter end to be connected with the output end of amplifier U7B, and the output end of module 13 as the reference voltage, is denoted as port Vref-out, and it is negative
The port Vjdg-in3 for carrying judgment module 4 is connected.
The delay compensation module of the invention of embodiment 5
Since there are delay effects for inductance, the capacitance network in the voltage tracking module 6 of rear class, in load judgment mould
Block 4 detects that the final voltage tracking module 6 that changes to of load makes inevitably certain prolong is adaptively adjusted
When, therefore this invention takes compensation of delay designs, eliminate the delay by delay compensation module 5, make voltage tracking module 6
Voltage adaptation adjustment is completely in the detection of load judgment module 4 to work asynchronously, to realize accurate effective control.It is described
Delay compensation module 5 schematic circuit as shown in figure 5, one end of resistance R13 is connected with one end of resistance R18, and as prolonging
When compensating module 5 input terminal, be denoted as port Vdly-in, be connected with the port Vjdg-out of load judgment module 4, resistance R13
The other end be connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal of amplifier U4A and resistance R14
One end be connected, another termination power Vcc/2 of resistance R14, the output end and resistance of the other end of resistance R15 and amplifier U4A
One end of R16 is connected, the other end of resistance R16 and one end, one end of resistance R21 and the anti-phase input of amplifier U5A of resistance R17
End is connected, and the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module 5, is denoted as
Port Vdly-out is connected with second input terminal of voltage tracking module 6, and the non-inverting input terminal of amplifier U5A is with resistance R22's
One end is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and one end, the capacitor C2 of resistance R20
One end be connected with the output end of amplifier U5B, the anti-phase input of the other end of the other end of resistance R20 and capacitor C2, amplifier U5B
The other end of end and resistance R18 are connected, the non-inverting input terminal of a termination amplifier U5B of resistance R19, another termination Vcc/2.
The voltage tracking module of the invention of embodiment 6
The schematic circuit of the voltage tracking module 6 as shown in fig. 6, resistance R23 termination power Vcc/2, it is another
End is connected with the reverse input end of amplifier U6A, non-inverting input terminal and one end of resistance R24, one end of resistance R25 of amplifier U6A
It is connected, the other end of resistance R24 is connected with the output end of amplifier U6A, the output end phase of the other end and amplifier U6B of resistance R25
Even, one end of resistance R26 is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B；Resistance R27
One end be connected with the noninverting input of amplifier U6B, another termination power Vcc/2；One end of capacitor C3 and one end of resistance R28
It is connected with the reverse input end of amplifier U6B, the other end is connected with the output end of amplifier U6B, the output end and resistance of amplifier U6B
One end of R29 is connected, and the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and as voltage tracking module 6
First input terminal, is denoted as port Vflw-in1, is connected with second output end of power failure protection module 8；One end of resistance R30
It is connected with the noninverting input of amplifier U7A, second input terminal of the other end as voltage tracking module 6 is denoted as port Vflw-
In2 is connected with the port Vdly-out of delay compensation module 5；One end of resistance R31 is connected with the reverse input end of amplifier U7A,
Another termination power Vcc/2；The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects electricity
Source Vcc, source electrode connect one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end of inductance L1 with
The anode of electrolytic capacitor C4, the anode of electrolytic capacitor C5, one end of capacitor C6, one end of capacitor C7 are connected, and as voltage
The output end of tracking module 6 is denoted as port Vflw-out, is connected with the port PWR-in1 of power output module 3；Electrolytic capacitor
The cathode of C4, the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 the other end be grounded.
Voltage tracking module 6 is output to power output mould after automatically adjusting the voltage vcc that power management module 14 provides
The port PWR-in1 of block 3, the power voltage of the electric current output loop as power output module 3, the voltage can follow load
Variation, when load changes, so that redundancy or not will not both occur because of load reduction in the voltage PWR-in1 of port at
Can be insufficient because load becomes larger, it works in always " critical state ", ensure that the maximal efficiency of whole system.
The overcurrent judgment module of the invention of embodiment 7
The schematic circuit of the overcurrent judgment module 7 is as shown in fig. 7, the noninverting input of amplifier U9A is sentenced as overcurrent
The input terminal of disconnected module 7, is denoted as port OC-in, is connected with the port PWR-out3 of power output module 3；One end of resistance R35
It is connected with the reverse input end of amplifier U9A, other end ground connection；One end of resistance R36 is connected with the reverse input end of amplifier U9A,
The other end is connected with one end of slide rheostat W3；The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A
And the noninverting input of amplifier U9B is connected；A termination power Vdd of slide rheostat W4, other end ground connection, end of slide wire and amplifier
The reverse input end of U9B is connected；Output end of the output end of amplifier U9B as overcurrent judgment module 7, is denoted as port OC-out,
It is connected with an input terminal of power failure protection module.
The module real-time detection power output module output current value, and with the (sliding of You Tuzhong of the safety value of setting
Rheostat W3 setting) it is compared, when the electric current of reality output is more than the safety value of setting, can be exported by port OC-out
Over-current signal executes de-energizing actions for triggering power failure protection module 8.
The power failure protection module of the invention of embodiment 8
The schematic circuit of power failure protection module 8 of the invention is as shown in figure 8, two input terminals of NAND gate U8A are made respectively
For two input terminals of power failure protection module 8, be denoted as port BRK-in1 and port BRK-in2, and respectively with overcurrent judgment module
7 output end, the output end of overtemperature judgment module 9 are connected, an input terminal of the output termination NAND gate U8B of NAND gate U8A,
The output end of another input termination NAND gate U8C of NAND gate U8B, one of the output termination NAND gate U8C of NAND gate U8B
The grid of input terminal and field-effect tube Q3, NAND gate U8C another input termination capacitor C8 one end and resistance R33 one
End, one end of another termination switch K1 of resistance R33 and one end of resistance R32, another termination power Vdd of resistance R32, switch
The other end of K1 and the other end of capacitor C8 are grounded；The source electrode of field-effect tube Q3 is grounded, and one end of resistance R34 is protected as power-off
First output end for protecting module 8, is denoted as port BRK-out1, and be connected with the port PWR-in2 of power output module 3, electricity
The drain electrode of another termination field-effect tube Q3 of R34, and second output end as power failure protection module 8 are hindered, port is denoted as
BRK-out2, port BRK-out2 simultaneously with the port PWR-in3 of power output module 3 and the port of voltage tracking module 6
Vflw-in1 is connected.
Two input ports of the module monitor " over-current signal " and overtemperature judgment module 9 of overcurrent judgment module 7 respectively
" overtemperature signal ", wherein can trigger de-energizing actions when thering is any one signal high level occur, i.e. control field-effect tube Q3
Conducting, port BRK-out1 is connected with the port PWR-in2 in power output module 3, by triggering power output module 3 after
Electric appliance EK1 disconnects switch, cuts off the energy source in output current loop；And port BRK-out2 simultaneously with power output mould
The port PWR-in3 of block 3, the port Vflw-in1 of voltage tracking module 6 are connected, and make at port PWR-in3, port Vflw-in1
Voltage is restricted to 0 simultaneously, while having cut off the control voltage of power output module 3 and voltage tracking module 6, further increases
The validity and safety of power-off.Power failure protection module 8 also takes unidirectional irreversible triggering mode simultaneously, once power-off letter
Number occur triggering de-energizing actions, even if power-off signal disappears, off-position will not be released at once, but need to pass through hand
It is dynamic to press switch K1 (reset button 154 i.e. on front panel 15) off-position be released, to prevent trigger signal in safety
Value Near The Critical Point triggers repeatedly.
The overtemperature judgment module of the invention of embodiment 9
The schematic circuit of the overtemperature judgment module 9 is as shown in figure 9, the cathode of zener diode D2 meets power supply Vdd, just
Pole connects the non-inverting input terminal of amplifier U10B, inverting input terminal and one end of capacitor C9, one end and two of resistance R38 of amplifier U10B
The emitter-base bandgap grading of pole pipe Q4 is connected, the output end of another termination amplifier U10B of another termination power Vdd of resistance R38, capacitor C9 and
One end of resistance R39, the base stage of another termination triode Q4 of resistance R39, the collector of triode Q4 are anti-with amplifier U10A's
Phase input terminal is connected, and an input terminal as overtemperature judgment module 9, is denoted as port OT-in1, one end of resistance R37 and fortune
The non-inverting input terminal for putting U10B is connected, another input terminal of the other end as overtemperature judgment module 9 is denoted as port OT-in2,
Port OT-in1, port OT-in2 are connected with two terminals of the thermistor input port 1411 in front panel 15 respectively；It is sliding
One end of dynamic rheostat W5 is connected with power supply Vdd, and other end ground connection, end of slide wire is connected with the noninverting input of amplifier U10A；Fortune
Output end of the output end of U10A as overtemperature judgment module 9 is put, OT-out is denoted as, it is defeated with another of power failure protection module 8
Enter end to be connected.
Laser can generate heat when being driven, and can lead if improper use (as cooling system failure, driving current are excessive etc.)
It causes the die temperature of laser persistently to increase, and then burns out laser, therefore can all integrate a heat inside most of laser
Quick resistance is used to monitor the temperature of laser, and the present invention provides overtemperature power down function, port OT-in1 and port OT-in2 divide
It is not connected with two terminals of the thermistor input port 156 on front panel 15 and (needs not distinguish between positive and negative anodes), heat when use
Quick resistance input port 156 is connected with the thermistor that driven laser is internally integrated, with the temperature of detection laser, when
When temperature is more than safety value (the You Tuzhong slide rheostat W5 setting) of setting, overtemperature signal is exported by port OT-out, with
It triggers power failure protection module 8 and executes de-energizing actions.Improve the safety of system.
The soft-start module of the invention of embodiment 10
In order to reduce the impact for powering on electric current to laser, need to take soft starting mode in laser driver, it is soft
Starting can refer to existing conventional techniques and be designed, it is possible to use structure provided in this embodiment, schematic circuit such as Figure 10 institute
Show, one end and the resistance R41 of a termination power Vdd and resistance R40 of switch K2 (start button 153 i.e. on front panel 15)
One end, the anode of another terminating diode D3 of resistance R40, one end of resistance R43 and resistance R44 one end, resistance R41's
One end of another terminating resistor R42 and the inverting input terminal of amplifier U11A, the other end ground connection of resistance R42, resistance R44's is another
End ground connection, the non-inverting input terminal of another termination amplifier U11A of resistance R43, the cathode of another terminating diode D3 of switch K2 and
One end of resistance R45, another termination ground connection of resistance R45, the positive power source terminal ground connection of amplifier U11A, negative supply termination power Vdd
With one end of resistance R48, the emitter of another termination triode Q6 of resistance R48, the collector of triode Q6 connects field-effect tube
The grid of Q7 and one end of resistance R50 and one end of capacitor C11, the other end of resistance R50 and another termination of capacitor C11
Ground, the source electrode ground connection of field-effect tube Q7, the output end to drain as soft-start module 12 are denoted as port SST-out, it is defeated to connect power
The port PWR-in3 of module 3 out, PWR-in3, the other end of the source S connecting resistance R62 of field-effect tube and capacitor C11's is another
End and ground, one end of the base stage connecting resistance R49 of triode Q6, the output end and electricity of another termination amplifier U11A of resistance R49
One end of R47 is hindered, the source electrode of the drain electrode of another termination field-effect tube Q5 of resistance R47, field-effect tube Q5 is grounded, and grid connects two poles
The anode of pipe D4, one end of capacitor C10, the cathode of diode D5 and resistance R46 one end, the other end of resistance R46 and two
The plus earth of pole pipe D5, the cathode of diode D4 and another termination power Vdd of capacitor C10.
The front panel of the invention of embodiment 11
The structure of front panel 15 of the invention is as shown in Figure 2, comprising: RS232 interface 151, power switch 152, starting are opened
Close 153, reset button 154, current output interface 155, thermistor input interface 156.In use, the program control module of the present apparatus
10 can be communicated by the RS232 interface 151 on front panel 15 with host computer, to realize that long-range control, electric current output connect
Mouth 155 is for laser output driving current, thermistor input interface 156 to be used to receive the thermistor feedback of laser
Signal carries out temperature monitoring.
Claims (3)
1. a kind of program control type impedance self-adaptive laser diode drive module, structure has front panel (15), program control module (10), list
Piece machine module (1), D/A converter module (2), power output module (3), analog-to-digital conversion module (11), soft-start module (12) and
Power management module (14)；It is characterized in that, there are also load judgment modules (4), delay compensation module (5), voltage-tracing for structure
Module (6), overcurrent judgment module (7), power failure protection module (8), overtemperature judgment module (9) and reference voltage module (13)；Its
In, single-chip microcontroller (1) is connected with program control module (10), analog-to-digital conversion module (11), D/A converter module (2) respectively, digital-to-analogue conversion
Module (2) is connected with power output module (3), and soft-start module (12) is connected with power output module (3), power output module
(3) it is connected respectively with analog-to-digital conversion module (11), load judgment module (4), overcurrent judgment module (7), reference voltage module
(13) it is connected with load judgment module (4), load judgment module (4) is connected with delay compensation module (5), delay compensation module
(5) it is connected with voltage tracking module (6), voltage tracking module (6) is connected with power output module (3), overcurrent judgment module
(7), overtemperature judgment module (9) is connected with power failure protection module (8), power failure protection module (8) respectively with power output module
(3) it is connected with voltage tracking module (6)；Power management module (14) is the electricity that mains AC can be converted into DC voltage
Road provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module；
The structure of the power output module (3) are as follows: one end of the switch of relay EK1 is as power output module (3)
First input terminal, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and as power output module (3)
First output end, is denoted as port PWR-out1, a termination power Vdd of the coil of relay EK1, and the other end is defeated as power
Second input terminal of module (3) out is denoted as port PWR-in2, the output end phase of the grid and amplifier U1A of field-effect tube Q1
Even, second output end of the source electrode as power output module (3) is denoted as port PWR-out2, a termination amplifier of resistance R1
The non-inverting input terminal of U1A, and the third input terminal as power output module (3), are denoted as port PWR-in3, resistance R1's
Four input terminal of the other end as power output module (3), is denoted as port PWR-in4, defeated with D/A converter module (2)
Enter end be connected, the inverting input terminal of amplifier U1A is connected with one end of one end of capacitor C1 and resistance R2, the other end of capacitor C1 and
The output end of amplifier U1A is connected, one end of the other end of resistance R2 and slide rheostat W1, the end of slide wire of slide rheostat W1 and
The output end of amplifier U1B is connected, and the other end of slide rheostat W1 is connected with one end of resistance R3, the other end and fortune of resistance R3
The inverting input terminal for putting U1B is connected with one end of resistance R4, the other end of resistance R4 ground connection, the non-inverting input terminal of amplifier U1B with
One end of resistance Rs is connected, and the third output end as power output module (3), is denoted as port PWR-out3, resistance Rs
The other end ground connection；
The structure of the load judgment module (4) are as follows: the non-inverting input terminal of amplifier U2A as load judgment module (4)
One input terminal, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module (3), the reverse phase of amplifier U2A
Input terminal is connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and one end of resistance R6 and amplifier
The non-inverting input terminal of U3A is connected, the other end ground connection of resistance R6, the output end of amplifier U3A and one end of resistance R8 and resistance R9
One end be connected, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, and resistance R7's is another
End is connected with the output end of the inverting input terminal of amplifier U2B and amplifier U2B, and the non-inverting input terminal of amplifier U2B is as load judgment
Second input terminal of module (4), is denoted as port Vjdg-in2, is connected with the port PWR-out2 of power output module (3), electricity
The other end of resistance R9 is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination power of resistance R10
The output end of Vcc/2, amplifier U3B are connected with one end of resistance R12, and the output end as load judgment module (4), are denoted as holding
Mouth Vjdg-out, is connected with the input terminal of delay compensation module (5), the other end of resistance R12 and the inverting input terminal of amplifier U3B
It is connected with one end of R11, the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, fortune
The non-inverting input terminal for putting U4B is connected with the end of slide wire of slide rheostat W2, one end ground connection of slide rheostat W2, other end conduct
The third input terminal of load judgment module (4), is denoted as port Vjdg-in3, the output end phase with reference voltage module (13)
Even；
The structure of the reference voltage module (13) are as follows: a termination power Vcc of resistance R51, the other end and zener diode
The cathode of D6 is connected with one end of slide rheostat W6, the anode of zener diode D6 and another termination of slide rheostat W6
The end of slide wire on ground, slide rheostat W6 is connected with the non-inverting input terminal of amplifier U7B, the inverting input terminal and amplifier U7B of amplifier U7B
Output end be connected, and the output end of module (13) as the reference voltage is denoted as port Vref-out, with load judgment module
(4) port Vjdg-in3 is connected；
The structure of the delay compensation module (5) are as follows: one end of resistance R13 is connected with one end of resistance R18, and as delay
The input terminal of compensating module (5), is denoted as port Vdly-in, is connected with the port Vjdg-out of load judgment module (4), resistance
The other end of R13 is connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal and resistance of amplifier U4A
One end of R14 is connected, another termination power Vcc/2 of resistance R14, the other end of resistance R15 and the output end and electricity of amplifier U4A
The one end for hindering R16 is connected, and the other end of resistance R16 and the reverse phase of one end of resistance R17, one end of resistance R21 and amplifier U5A are defeated
Entering end to be connected, the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module (5),
It is denoted as port Vdly-out, is connected with second input terminal of voltage tracking module (6), the non-inverting input terminal and electricity of amplifier U5A
The one end for hindering R22 is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and the one of resistance R20
It holds, one end of capacitor C2 is connected with the output end of amplifier U5B, the other end of resistance R20 and the other end, the amplifier U5B of capacitor C2
Inverting input terminal and resistance R18 the other end be connected, resistance R19 one termination amplifier U5B non-inverting input terminal, another termination
Vcc/2；
The structure of the voltage tracking module (6) is that termination power Vcc/2 of resistance R23, the other end is with amplifier U6A's
Reverse input end is connected, and the non-inverting input terminal of amplifier U6A is connected with one end of one end of resistance R24, resistance R25, resistance R24's
The other end is connected with the output end of amplifier U6A, and the other end of resistance R25 is connected with the output end of amplifier U6B, and the one of resistance R26
End is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B；One end of resistance R27 and amplifier
The noninverting input of U6B is connected, another termination power Vcc/2；One end of capacitor C3 and one end of resistance R28 are with amplifier U6B's
Reverse input end is connected, and the other end is connected with the output end of amplifier U6B, one end phase of the output end and resistance R29 of amplifier U6B
Even, the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and first input as voltage tracking module (6)
End, is denoted as port Vflw-in1, is connected with second output end of power failure protection module (8)；One end of resistance R30 and amplifier
The noninverting input of U7A is connected, and second input terminal of the other end as voltage tracking module (6) is denoted as port Vflw-in2,
It is connected with the port Vdly-out of delay compensation module (5)；One end of resistance R31 is connected with the reverse input end of amplifier U7A, separately
One termination power Vcc/2；The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects power supply
Vcc, source electrode connect one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end and electricity of inductance L1
Solve the anode of capacitor C4, the anode of electrolytic capacitor C5, one end of capacitor C6, capacitor C7 one end be connected, and as voltage with
The output end of track module (6), is denoted as port Vflw-out, is connected with the port PWR-in1 of power output module (3)；Electrolysis electricity
The other end for holding the cathode of C4, the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 is grounded；
The structure of the overcurrent judgment module (7) is that the noninverting input of amplifier U9A is as the defeated of overcurrent judgment module (7)
Enter end, is denoted as port OC-in, is connected with the port PWR-out3 of power output module (3)；One end of resistance R35 and amplifier U9A
Reverse input end be connected, the other end ground connection；One end of resistance R36 is connected with the reverse input end of amplifier U9A, the other end and cunning
One end of dynamic rheostat W3 is connected；The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A and amplifier U9B's
Noninverting input is connected；A termination power Vdd of slide rheostat W4, other end ground connection, end of slide wire are reversed defeated with amplifier U9B's
Enter end to be connected；Output end of the output end of amplifier U9B as overcurrent judgment module (7), is denoted as port OC-out, with power-off protection
One input terminal of module is connected；
The structure of the power failure protection module (8) is that two input terminals of NAND gate U8A are respectively as power failure protection module
(8) two input terminals, are denoted as port BRK-in1 and port BRK-in2, and respectively with the output end of overcurrent judgment module (7),
The output end of overtemperature judgment module (9) is connected, an input terminal of the output termination NAND gate U8B of NAND gate U8A, NAND gate
The output end of another input termination NAND gate U8C of U8B, an input terminal of the output termination NAND gate U8C of NAND gate U8B
With the grid of field-effect tube Q3, one end of another input termination capacitor C8 of NAND gate U8C and one end of resistance R33, resistance
One end of another termination switch K1 of R33 and one end of resistance R32, another termination power Vdd of resistance R32, switch K1's is another
The other end of one end and capacitor C8 are grounded；The source electrode of field-effect tube Q3 is grounded, and one end of resistance R34 is as power failure protection module
(8) first output end is denoted as port BRK-out1, and is connected with the port PWR-in2 of power output module (3), resistance
The drain electrode of another termination field-effect tube Q3 of R34, and second output end as power failure protection module (8), are denoted as port
BRK-out2, port BRK-out2 simultaneously with the port PWR-in3 of power output module (3) and the end of voltage tracking module (6)
Mouth Vflw-in1 is connected；
The structure of the overtemperature judgment module (9) is that the cathode of zener diode D2 meets power supply Vdd, and anode meets amplifier U10B
Non-inverting input terminal, one end, one end of resistance R38 and the emitter-base bandgap grading of diode Q4 of the inverting input terminal of amplifier U10B and capacitor C9
It is connected, the one of the output end of another termination amplifier U10B of another termination power Vdd of resistance R38, capacitor C9 and resistance R39
End, the base stage of another termination triode Q4 of resistance R39, the inverting input terminal phase of the collector and amplifier U10A of triode Q4
Connect, and an input terminal as overtemperature judgment module (9), is denoted as port OT-in1, one end of resistance R37 is with amplifier U10B's
Non-inverting input terminal is connected, another input terminal of the other end as overtemperature judgment module (9) is denoted as port OT-in2, port OT-
In1, port OT-in2 are connected with two terminals of the thermistor input port (1411) in front panel (15) respectively；Sliding becomes
One end of resistance device W5 is connected with power supply Vdd, and other end ground connection, end of slide wire is connected with the noninverting input of amplifier U10A；Amplifier
Output end of the output end of U10A as overtemperature judgment module (9), is denoted as OT-out, with power failure protection module (8) another
Input terminal is connected；
The structure of the front panel (15) includes: RS232 interface (151), power switch (152), starts switch (153), is multiple
Position button (154), current output interface (155), thermistor input interface (156).
2. a kind of program control type impedance self-adaptive laser diode drive module according to claim 1, which is characterized in that institute
The power Vcc stated, power Vcc/2, power supply Vdd are respectively 48V, 24V and 5V.
3. a kind of program control type impedance self-adaptive laser diode drive module according to claim 1, which is characterized in that institute
The circuit parameter for the delay compensation module (5) stated is as follows: resistance R13, R14 4K, R15 40K, R16, R21 20K, R17,
R20 is 10K, R18, R19 1K, R22 5.1K, and capacitor C2 is 5pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598203.XA CN109524876B (en) | 2018-12-26 | 2018-12-26 | A Programmable Impedance Adaptive Laser Diode Driver Module |
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| CN105528009A (en) * | 2015-12-29 | 2016-04-27 | 吉林大学 | Portable bi-directional constant current source module |
| CN106444945A (en) * | 2016-09-05 | 2017-02-22 | 吉林大学 | Digital program-control constant current source |
| CN106486963A (en) * | 2016-11-25 | 2017-03-08 | 西安微电子技术研究所 | A radiation-resistant self-recovery overcurrent/short circuit protection circuit for satellites |
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| US20040160879A1 (en) * | 2000-11-10 | 2004-08-19 | Pioneer Corporation | Recording apparatus for use with optical recording medium and method thereof |
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| CN104300788A (en) * | 2014-10-24 | 2015-01-21 | 电子科技大学 | An adaptive voltage regulation circuit |
| CN105404347A (en) * | 2015-12-29 | 2016-03-16 | 吉林大学 | Dual-loop feedback constant-current source circuit |
| CN105528009A (en) * | 2015-12-29 | 2016-04-27 | 吉林大学 | Portable bi-directional constant current source module |
| CN106444945A (en) * | 2016-09-05 | 2017-02-22 | 吉林大学 | Digital program-control constant current source |
| CN106486963A (en) * | 2016-11-25 | 2017-03-08 | 西安微电子技术研究所 | A radiation-resistant self-recovery overcurrent/short circuit protection circuit for satellites |
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