CN109358695A - A kind of loaded self-adaptive constant-current source device - Google Patents
A kind of loaded self-adaptive constant-current source device Download PDFInfo
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- CN109358695A CN109358695A CN201811598180.2A CN201811598180A CN109358695A CN 109358695 A CN109358695 A CN 109358695A CN 201811598180 A CN201811598180 A CN 201811598180A CN 109358695 A CN109358695 A CN 109358695A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Abstract
A kind of loaded self-adaptive constant-current source device of the invention belongs to the technical field of electronic equipment, and primary structure has electric current setup module (1), clipping setup module (2), power output module (3), load judgment module (4), delay compensation module (5), voltage tracking module (6) and power failure protection module (8) etc..The present invention can actively adapt to the variation of load at work, with high-efficient, adaptive load range is wide, highly-safe, high reliability.
Description
Technical field
The invention belongs to the technical fields of electronic equipment.In particular to a kind of loaded self-adaptive constant-current source device.
Background technique
Constant-current source is in many fields such as LED drives, laser drives, sensor driving, the drivings of various glow discharge sources
Inside there is important application.The basic principle of constant-current source circuit be usually utilize the nonlinear characteristic of triode or field-effect tube with
And profound and negative feedbck technology, make the control for exporting current controlled voltage processed, the electricity of load is kept flow through when loading and changing
It flows constant.In constant-current source circuit, the stability of electric current and the efficiency of circuit are two vital parameters.
It is that Chinese patent filed in this seminar on December 29th, 2015 is " a kind of double with the immediate prior art of the present invention
Ring feeds back constant-current source circuit " (application number: 201511008766.5), which increases one on the basis of common constant-current source
Feedback loop effectively increases the stability of output electric current and the reliability of circuit work.But with other prior art constant currents
Source circuit is the same, which there is a problem of to adaptive load ability difference.Specifically, a constant-current source circuit can only drive one
Kind of fixed load, or only allow to be supported on very a small range variation, cause to control when loading and increasing the triode of electric current into
Enter to saturation region, and then maximum output current is caused to decline (can not continue to keep controllably output constant current) rapidly, and when negative
So that triode is entered under-voltage area when carrying reduction, (because load is small, the voltage that load both ends generate is also small, in the art
It is referred to as under-voltage), since triode and load exist together in a series loop, and triode is nonlinear device, therefore loads electricity
The reduction of pressure causes triode to automatically take on the extra voltage in circuit, and then the internal power consumption of triode is caused to steeply rise, and
The internal power consumption of triode belongs to " by-product " of circuit, and to the evil of system hundred, none is sharp: the increase of one side pipe power consumption can make
Tube temperature sharply increases and increases the risk (service life of lowering apparatus) that pipe is burnt out, on the other hand when the load
Power supply cannot be adjusted in time causes the efficiency of entire circuit to be greatly lowered, this is when constant-current source is used for mobile device
It is very unfavorable.Because when working on a mobile platform, in order to guarantee the cruise duration of system, efficiency often needs emphasis to examine
The index considered.In addition, there is no overcurrent power-off protection function in technical solution disclosed in above-mentioned patent, once current limliting module
It will lead to the risk that output electric current is more than limitation electric current (generally maximum safe current) when failure, cause the damage of load or instrument
It is bad.
Therefore existing constant current source technology also needs to be optimized.
Summary of the invention
The technical problem to be solved by the present invention is to it is permanent to provide a kind of loaded self-adaptive for disadvantage of the existing technology
Stream source device is capable of the parameter of auto-adjusting circuit itself when load impedance changes, and is become with adapting to the impedance of load
Change, keeps high efficiency, and have the function of overcurrent power-off protection.
Specific technical solution of the invention is:
A kind of loaded self-adaptive constant-current source device, structure have front panel 12, electric current setup module 1, clipping setup module 2,
Power output module 3, driver module 9, power management module 11；It is characterized in that, structure there are also reference voltage module 10,
Load judgment module 4, delay compensation module 5, voltage tracking module 6, overcurrent judgment module 7, power failure protection module 8；Wherein, electric
Stream setup module 1 is connected with clipping setup module 2, and clipping setup module 2 also drives mould with power output module 3 and display respectively
Block 9 is connected, and power output module 3 is connected with driver module 9, load judgment module 4, overcurrent judgment module 7 respectively, reference
Voltage module 10 is connected with load judgment module 4, and 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 and power-off protection
Module 8 is connected, and power failure protection module 8 is connected with power output module 3 and voltage tracking module 6 respectively；Power management module 11
Mains AC can be converted into the circuit of DC voltage, provide Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module；
The structure of the clipping setup module 2 are as follows: input terminal of the one end of resistance R42 as clipping setup module 2, note
Make port CL-in, the non-inverting input terminal of another termination amplifier U11B and the anode of diode D3, the cathode of diode D3 connects amplifier
The output end of U10A and one end of resistance R41, the inverting input terminal of another termination amplifier U10A of resistance R41, amplifier U10A's
Non-inverting input terminal is connected with the one end resistance R40, and the other end of resistance R40 is connected with the sliding end of slide rheostat W6, and sliding becomes
A termination power Vdd of device W6, other end ground connection are hindered, the inverting input terminal of amplifier U11B is connected with one end of resistance R43, resistance
The other end of R43 is connected with the output end of amplifier U11B, output end of the output end of amplifier U11B as clipping setup module 2,
It is denoted as port CL-out, meets the port PWR-in4 of power output module 3；
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 output end of clipping setup 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 10；
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
8 input terminal is connected；
The structure of the power failure protection module 8 is that two input terminals of NAND gate U8A are connected, and is denoted as port BRK-in,
As the input terminal of power failure protection module 8, be connected with the output end of overcurrent judgment module 7, the output of NAND gate U8A termination with it is non-
An input terminal of door U8B, the output end of another input termination NAND gate U8C of NAND gate U8B, the output of NAND gate U8B
The grid of an input terminal and field-effect tube Q3 of NAND gate U8C is terminated, another input termination capacitor C8's of NAND gate U8C
One end of one end and resistance R33, one end of another termination switch K1 of resistance R33 and one end of resistance R32, resistance R32's is another
The other end of one termination power Vdd, switch K1 and the other end of capacitor C8 are grounded；The source electrode of field-effect tube Q3 is grounded, resistance
First output end of the one end of R34 as power failure protection module 8, is denoted as port BRK-out1, and with power output module 3
Port PWR-in2 is connected, the drain electrode of another termination field-effect tube Q3 of resistance R34, and second as power failure protection module 8
Output end, is denoted as port BRK-out2, port BRK-out2 simultaneously with the port PWR-in3 of power output module 3 and voltage with
The port Vflw-in1 of track module 6 is connected；
The structure of the driver module 9 is, one end ground connection of resistance R44, one end of another terminating resistor R45 and
The inverting input terminal of amplifier U11A, a fixing end of another termination slide rheostat W7 of resistance R45, the same phase of amplifier U11A
An input terminal of the input terminal as driver module 9, is denoted as port DIS-in1, the output end phase with clipping setup module 2
Even, for sample clipping setup module 2 setting cut-off current, amplifier U11A output termination slide rheostat W7 end of slide wire and
A selection end of switch SW1, one end ground connection of resistance R46, one end of another terminating resistor R47 and the reverse phase of amplifier U12B are defeated
Enter end, the non-inverting input terminal of a fixing end of another termination slide rheostat W8 of resistance R47, amplifier U12B is driven as display
Another input terminal of dynamic model block 9, is denoted as port DIS-in2, the port PWR-out3 with power output module 3, for sampling
The current value of 3 reality output of power output module, the end of slide wire and switch SW1 of the output termination slide rheostat W8 of amplifier U12B
Another selection end, the negative supply termination power Vdd of amplifier U12B, positive power source terminal ground connection, the common end of switch SW1 is as display
The output end of drive module 9, is denoted as DIS-out, connects the signal input part of the digital watch 123 in front panel 12, light-emitting diodes
The anode of pipe D4 meets power supply Vdd, and cathode connects a selection end of switch SW2, and the anode of light emitting diode D5 meets power supply Vdd, yin
Pole connects another selection end of switch SW2, one end of the public terminating resistor R48 of switch SW2, the other end ground connection of resistance R48；
The structure of the reference voltage module 10 are as follows: a termination power Vcc of resistance R49, the other end and two pole of pressure stabilizing
The cathode of pipe D6 is connected with one end of slide rheostat W9, the anode of zener diode D6 and another termination of slide rheostat W9
The end of slide wire on ground, slide rheostat W9 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 10 as the reference voltage is denoted as port Vref-out, with load judgment module 4
Port Vjdg-in3 is connected；
The structure of the front panel 12 includes: display selection 121, power switch 122, digital watch 123, limitation electric current
127, reset button 128, current output terminal mouth are arranged in indicator light 124, output alternator indicator 125, clipping setting 126, electric current
129。
In a kind of loaded self-adaptive constant-current source device of the invention, the power Vcc, power Vcc/2, power supply Vdd
Preferred 48V, 24V and 5V respectively.
In a kind of loaded self-adaptive constant-current source device of the invention, the circuit parameter of the delay compensation module 5 is excellent
Select as follows: resistance R13, R14 4K, R15 40K, R16, R21 20K, R17, R20 10K, R18, R19 1K, R22 are
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 electric current
Source is to the adaptive of load impedance, so that load impedance, in wide variation, the device of the invention can be safe and stable, high
The work of effect ground.
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 has overcurrent power-off protection function, when exporting electric current more than preset safety value, cuts off function rapidly
The current supply circuit of rate output module, and the control signal of power output module and voltage tracking module is locked to 0 simultaneously, it is real
Now to the multi-faceted protection of system, the safety of system is substantially increased.
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 electric current setup module 1 of the invention.
Fig. 4 is the schematic diagram of clipping setup module 2 of the invention.
Fig. 5 is the schematic diagram of power output module 3 of the invention.
Fig. 6 is the schematic diagram of load judgment module 4 of the invention.
Fig. 7 is the schematic diagram of delay compensation module 5 of the invention.
Fig. 8 is the schematic diagram of voltage tracking module 6 of the invention.
Fig. 9 is the schematic diagram of overcurrent judgment module 7 of the invention.
Figure 10 is the schematic diagram of power failure protection module 8 of the invention.
Figure 11 is the schematic diagram of driver module 9 of the invention.
Figure 12 is the schematic diagram of reference voltage module 10 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, have electric current setup module 1, clipping setup module 2, power output module
3, load judgment module 4, delay compensation module 5, voltage tracking module 6, overcurrent judgment module 7, power failure protection module 8, display
Drive module 9, reference voltage module 10, power management module 11, front panel 12；Wherein, electric current setup module 1 and clipping are arranged
Module 2 is connected, and clipping setup module 2 is also connected with power output module 3 and driver module 9 respectively, power output module 3
It is connected respectively with driver module 9, load judgment module 4, overcurrent judgment module 7, reference voltage module 10 and load judgment
Module 4 is connected, and load judgment module 4 is connected with delay compensation module 5, and delay compensation module 5 is connected with voltage tracking module 6,
Voltage tracking module 6 is connected with power output module 3, and overcurrent judgment module 7 is connected with power failure protection module 8, power-off protection mould
Block 8 is connected with power output module 3 and voltage tracking module 6 respectively；Mains AC can be converted by power management module 11
The circuit of DC voltage provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module.
The electric current setup module of the invention of embodiment 2
Electric current setup module 1 of the invention belongs to the prior art, can carry out conventional design according to actual needs, can also be with
Using structure as shown in Figure 3, a termination power Vdd of resistance R37, the cathode of another termination zener diode D2 and sliding become
Hinder a fixing end of device W5, the plus earth of zener diode D2, another fixing end ground connection of slide rheostat W5, resistance
The end of slide wire of a termination slide rheostat W5 of R38, the non-inverting input terminal of another termination amplifier U10B, the reverse phase of amplifier U10B are defeated
Enter one end of terminating resistor R39, the output end of another termination amplifier U10B of resistance R39, and as the defeated of electric current setup module 1
Outlet is denoted as port CSet-out, is connected with the input terminal of clipping setup module 2.
Wherein slide rheostat W5 is located on front panel 12, is the electric current setting 127 in front panel 12, is slided by changing
Rheostat W5 can control the output voltage of electric current setup module, the final output electric current for influencing power output module 3.
The clipping setup module of the invention of embodiment 3
Clipping setup module 2 of the invention belongs to the prior art, can carry out conventional design according to actual needs, can also be used
Structure provided in this embodiment, as shown in figure 4, input terminal of the one end of resistance R42 as clipping setup module 2, is denoted as port
CL-in, the non-inverting input terminal of another termination amplifier U11B and the anode of diode D3, the cathode of diode D3 connect amplifier U10A's
One end of output end and resistance R41, the inverting input terminal of another termination amplifier U10A of resistance R41, amplifier U10A's is same mutually defeated
Enter end to be connected with the one end resistance R40, the other end of resistance R40 is connected with the sliding end of slide rheostat W6, slide rheostat W6
A termination power Vdd, other end ground connection, the inverting input terminal of amplifier U11B is connected with one end of resistance R43, resistance R43's
The other end is connected with the output end of amplifier U11B, and output end of the output end of amplifier U11B as clipping setup module 2 is denoted as holding
Mouth CL-out, meets the port PWR-in4 of power output module 3.
Wherein slide rheostat W6 is located on front panel 12, is the clipping setting 126 in front panel 12, is slided by changing
The amplitude limit value (depending on the load parameter to be driven) of a safety can be set in rheostat W6, when electric current setup module 1 exports
Voltage be less than this amplitude limit value when, set by the control voltage that clipping setup module 2 is output to power output module 3 equal to electric current
The voltage (not changing amplitude) of the output of module 1 is set, and when the voltage that electric current setup module 1 exports is greater than this amplitude limit value, output
Control voltage to power output module 3 is limited to this amplitude limit value and no longer by the control of electric current setup module 1, and then makes function
The current value of rate output module output is limited to a fixed value without being further increased by electric current setup module 1.This hair
It is bright to realize that simple and reliable for structure, power loss is small to the Current limited Control of output by limitation control voltage.
The power output module of the invention of embodiment 4
The basic circuit diagram of the power output module 3 as shown in figure 5, 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, the inverting input terminal of amplifier U1A
It is connected with one end of one end of capacitor C1 and resistance R2, the other end of capacitor C1 is connected with the output end of amplifier U1A, resistance R2's
The other end is connected with the output end of one end of slide rheostat W1, the end of slide wire of slide rheostat W1 and amplifier U1B, slides variable resistance
The other end of device W1 is connected with one end of resistance R3, the other end of resistance R3 and the inverting input terminal of amplifier U1B and resistance R4's
One end is connected, and the other end ground connection of resistance R4, the non-inverting input terminal of amplifier U1B is connected with one end of resistance Rs, and as power
The third output end of output module 3 is denoted as port PWR-out3, the other end ground connection of resistance Rs.
Power output module 3 converts voltage to corresponding output under the control for the voltage that clipping setup module 2 exports
Electric current is extremely loaded by the output of current output terminal mouth 123 of front panel 12.
The load judgment module of the invention of embodiment 5
The schematic circuit of the load judgment module 4 is as shown in fig. 6, 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 10.
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 10) 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 6
The schematic circuit of the reference voltage module 10 is as shown in figure 12, a termination power Vcc of resistance R49, another
End is connected with one end of the cathode of zener diode D6 and slide rheostat W9, the anode and slide rheostat of zener diode D6
The other end of W9 is grounded, and the end of slide wire of slide rheostat W9 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 10 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 7
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 fig. 7, 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 8
The schematic circuit of the voltage tracking module 6 as shown in figure 8, 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 11 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 9
The schematic circuit of the overcurrent judgment module 7 is as shown in figure 9, 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 the input terminal of power failure protection module 8.
The current value of module real-time detection power output module output, and with the safety value of setting (by the sliding in figure
Rheostat W4 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 10
The schematic circuit of power failure protection module 8 of the invention is as shown in Figure 10, and two input terminals of NAND gate U8A are connected,
It is denoted as port BRK-in, as the input terminal of power failure protection module 8, is connected with the output end of overcurrent judgment module 7, NAND gate
An input terminal of the output termination NAND gate U8B of U8A, the output of another input termination NAND gate U8C of NAND gate U8B
End, the grid of an input terminal and field-effect tube Q3 of the output termination NAND gate U8C of NAND gate U8B, NAND gate U8C's is another
One end of a input termination capacitor C8 and one end of resistance R33, one end of another termination switch K1 of resistance R33 and resistance R32
One end, another termination power Vdd of resistance R32, the other end of switch K1 and the other end of capacitor C8 are grounded；Field-effect tube
The source electrode of Q3 is grounded, and first output end of the one end of resistance R34 as power failure protection module 8 is denoted as port BRK-out1, and
It is connected with the port PWR-in2 of power output module 3, the drain electrode of another termination field-effect tube Q3 of resistance R34, and as power-off
Second output end of protective module 8 is denoted as port BRK-out2, port BRK-out2 while the end with power output module 3
Mouth PWR-in3 is connected with the port Vflw-in1 of voltage tracking module 6.
" over-current signal " of the module monitors overcurrent judgment module 7 can trigger disconnected when over-current signal is effective (high level)
Electronic work, i.e. control field-effect tube Q3 conducting, port BRK-out1 are connected with the port PWR-in2 in power output module 3, will
The relay EK1 triggered in power output module 3 disconnects switch, cuts off the energy source in output current loop；And port
BRK-out2 is connected with the port Vflw-in1 of the port PWR-in3 of power output module 3, voltage tracking module 6 simultaneously, makes to hold
Voltage is restricted to 0 simultaneously at mouth PWR-in3, port Vflw-in1, while having cut off power output module 3 and voltage-tracing mould
The control voltage of block 6 further improves the validity and safety of power-off.Power failure protection module 8 also takes unidirectionally simultaneously
Irreversible triggering mode, even if power-off signal disappears, will not solve at once once power-off signal occurs triggering de-energizing actions
Except off-position, but need that power-off could be released by manually actuated switch K1 (reset button 128 i.e. on front panel 12)
State, to prevent trigger signal from triggering repeatedly in safety value Near The Critical Point.
The driver module of the invention of embodiment 11
The schematic circuit of driver module 9 is as shown in figure 11, one end ground connection of resistance R44, another terminating resistor R45's
The inverting input terminal of one end and amplifier U11A, a fixing end of another termination slide rheostat W7 of resistance R45, amplifier U11A
An input terminal of the non-inverting input terminal as driver module 9, be denoted as port DIS-in1, it is defeated with clipping setup module 2
Outlet is connected, for sampling the cut-off current of the setting of clipping setup module 2, the cunning of the output termination slide rheostat W7 of amplifier U11A
One selection end of line end and switch SW1, one end ground connection of resistance R46, one end of another terminating resistor R47 and amplifier U12B's
Inverting input terminal, a fixing end of another termination slide rheostat W8 of resistance R47, the non-inverting input terminal conduct of amplifier U12B
Another input terminal of driver module 9, is denoted as port DIS-in2, the port PWR-out3 with power output module 3, uses
In the current value of 3 reality output of sampled power output module, the end of slide wire of the output termination slide rheostat W8 of amplifier U12B and
Another selection end switch SW1, the negative supply termination power Vdd of amplifier U12B, positive power source terminal ground connection, the common end of switch SW1
As the output end of driver module 9, it is denoted as DIS-out, connects the signal input part of the digital watch 123 in front panel 12,
The anode of light emitting diode D4 meets power supply Vdd, and cathode connects a selection end of switch SW2, and the anode of light emitting diode D5 connects electricity
Source Vdd, cathode connect another selection end of switch SW2, and one end of the public terminating resistor R48 of switch SW2, resistance R48's is another
One end ground connection.
Driver module 9 provides the driving and selection of display signal for front panel, wherein switch SW1 and switch SW2 structure
At a double-point double-throw switch, i.e., selection 121 is shown in front panel 12, may be selected by this switch " limitation electric current " or " practical
Output electric current ", which is sent to digital watch 123, to be shown.
The front panel of the invention of embodiment 12
The structure of the front panel 12 is as shown in Figure 2, comprising: display selection 121, power switch 122, digital watch
123, alternator indicator 124, output alternator indicator 125, clipping setting 126, electric current setting 127, current output terminal mouth are limited
129, reset button 128.
The display selection 121 is that a double-pole double throw being made of switch SW1 and SW2 in driver module 9 is opened
It closes, for controlling the display of digital watch 123 limitation electric current or actual output current, the power switch 122 is whole device
Battery main switch, the digital watch 123 is a digital voltmeter, and signal input part connects the display driving mould
The port DIS-out of block 9, the limitation alternator indicator 124, output alternator indicator 125 are two light emitting diodes, point
Be not the light emitting diode D4 and D5 in driver module 9, be used to refer to digital watch 123 it is currently displayed be limitation electricity
Stream or actual output current, the clipping setting 126, electric current setting 127 are the knobs that two resistance values are 100k Ω
Slide rheostat is the slide rheostat in the slide rheostat W6 and electric current setup module 1 in clipping setup module 2 respectively
W5, is respectively intended to setting limitation electric current and actual output current value, the current output terminal mouth 129 are connecing for a two-phase
Mouthful, positive and negative electrode is connected with port PWR-out2, the port PWR-out3 in power output module 3 respectively, for producing the present apparatus
Raw driving current exports the laser diode driven to needs, and the reset button 128 is the power failure protection module 8
In switch K1.
Claims (3)
1. a kind of loaded self-adaptive constant-current source device, structure has front panel (12), electric current setup module (1), clipping setup module
(2), power output module (3), driver module (9), power management module (11)；It is characterized in that, there are also refer to for structure
Voltage module (10), load judgment module (4), delay compensation module (5), voltage tracking module (6), overcurrent judgment module (7),
Power failure protection module (8)；Wherein, electric current setup module (1) is connected with clipping setup module (2), and clipping setup module (2) is also divided
Be not connected with power output module (3) and driver module (9), power output module (3) respectively with driver module
(9), load judgment module (4), overcurrent judgment module (7) are connected, reference voltage module (10) and load judgment module (4) phase
Even, load judgment module (4) is connected with delay compensation module (5), and delay compensation module (5) is connected with voltage tracking module (6),
Voltage tracking module (6) is connected with power output module (3), and overcurrent judgment module (7) is connected with power failure protection module (8), breaks
Electric protection module (8) is connected with power output module (3) and voltage tracking module (6) respectively；Power management module (11) can incite somebody to action
Mains AC is converted into the circuit of DC voltage, provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module；
The structure of the clipping setup module (2) are as follows: input terminal of the one end of resistance R42 as clipping setup module (2), note
Make port CL-in, the non-inverting input terminal of another termination amplifier U11B and the anode of diode D3, the cathode of diode D3 connects amplifier
The output end of U10A and one end of resistance R41, the inverting input terminal of another termination amplifier U10A of resistance R41, amplifier U10A's
Non-inverting input terminal is connected with the one end resistance R40, and the other end of resistance R40 is connected with the sliding end of slide rheostat W6, and sliding becomes
A termination power Vdd of device W6, other end ground connection are hindered, the inverting input terminal of amplifier U11B is connected with one end of resistance R43, resistance
The other end of R43 is connected with the output end of amplifier U11B, output of the output end of amplifier U11B as clipping setup module (2)
End, is denoted as port CL-out, meets the port PWR-in4 of power output module (3)；
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 clipping setup module (2)
Outlet 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 (10)
Even；
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
The input terminal of module (8) is connected；
The structure of the power failure protection module (8) is that two input terminals of NAND gate U8A are connected, and are denoted as port BRK-in, is made
For the input terminal of power failure protection module (8), be connected with the output end of overcurrent judgment module (7), the output of NAND gate U8A termination with
An input terminal of NOT gate U8B, the output end of another input termination NAND gate U8C of NAND gate U8B, NAND gate U8B's is defeated
The grid of an input terminal and field-effect tube Q3 of NAND gate U8C, another input termination capacitor C8 of NAND gate U8C are terminated out
One end and resistance R33 one end, one end of another termination switch K1 of resistance R33 and one end of resistance R32, resistance R32's
The other end of another termination power Vdd, switch K1 and the other end of capacitor C8 are grounded；The source electrode of field-effect tube Q3 is grounded, electricity
First output end of the one end as power failure protection module (8) for hindering R34, is denoted as port BRK-out1, and with power output mould
The port PWR-in2 of block (3) is connected, the drain electrode of another termination field-effect tube Q3 of resistance R34, and as power failure protection module
(8) second output end is denoted as port BRK-out2, port BRK-out2 while the port with power output module (3)
PWR-in3 is connected with the port Vflw-in1 of voltage tracking module (6)；
The structure of the driver module (9) is one end ground connection of resistance R44, one end of another terminating resistor R45 and fortune
The inverting input terminal of U11A is put, a fixing end of another termination slide rheostat W7 of resistance R45, amplifier U11A's is same mutually defeated
Enter an input terminal of the end as driver module (9), is denoted as port DIS-in1, the output end with clipping setup module (2)
It is connected, for sampling the cut-off current of clipping setup module (2) setting, the slip of the output termination slide rheostat W7 of amplifier U11A
One selection end at end and switch SW1, one end of resistance R46 are grounded, and one end of another terminating resistor R47 and amplifier U12B's is anti-
Phase input terminal, a fixing end of another termination slide rheostat W8 of resistance R47, the non-inverting input terminal of amplifier U12B is as aobvious
Another input terminal for showing drive module (9), is denoted as port DIS-in2, the port PWR-out3 with power output module (3),
For the current value of sampled power output module (3) reality output, the slip of the output termination slide rheostat W8 of amplifier U12B
End and another selection end switch SW1, the negative supply termination power Vdd of amplifier U12B, positive power source terminal ground connection, the public affairs of switch SW1
Output end of the end as driver module (9) altogether, is denoted as DIS-out, connects the letter of the digital watch (123) in front panel (12)
Number input terminal, the anode of light emitting diode D4 meet power supply Vdd, and cathode connects a selection end of switch SW2, light emitting diode D5's
Anode meets power supply Vdd, and cathode connects another selection end of switch SW2, one end of the public terminating resistor R48 of switch SW2, resistance
The other end of R48 is grounded；
The structure of the reference voltage module (10) are as follows: a termination power Vcc of resistance R49, the other end and zener diode
The cathode of D6 is connected with one end of slide rheostat W9, the anode of zener diode D6 and another termination of slide rheostat W9
The end of slide wire on ground, slide rheostat W9 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 (10) as the reference voltage is denoted as port Vref-out, with load judgment module
(4) port Vjdg-in3 is connected；
The structure of the front panel (12) includes: display selection (121), power switch (122), digital watch (123), limitation
(127), reset button are arranged in alternator indicator (124), output alternator indicator (125), clipping setting (126), electric current
(128), current output terminal mouth (129).
2. a kind of loaded self-adaptive constant-current source device according to claim 1, which is characterized in that the power Vcc, electricity
Source Vcc/2, power supply Vdd are respectively 48V, 24V and 5V.
3. a kind of loaded self-adaptive constant-current source device according to claim 1, which is characterized in that the compensation of delay mould
The circuit parameter of block (5) is 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.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6917187B2 (en) * | 2002-11-21 | 2005-07-12 | Rohm Co., Ltd. | Stabilized DC power supply device |
| DE102004033980A1 (en) * | 2004-07-14 | 2006-02-16 | Infineon Technologies Ag | Control of an electrical load such as a light emitting diode has load current measured and compared with reference |
| CN101763128A (en) * | 2009-12-03 | 2010-06-30 | 深圳市大族激光科技股份有限公司 | Constant current source |
| CN104300788A (en) * | 2014-10-24 | 2015-01-21 | 电子科技大学 | Self-adaptation voltage regulator 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 |
| CN105843315A (en) * | 2016-05-11 | 2016-08-10 | 国神光电科技（上海）有限公司 | Constant current source control method and constant current source circuit |
| CN106207730A (en) * | 2016-09-05 | 2016-12-07 | 吉林大学 | A kind of high stability laser pumping source with overheat protection function |
| 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 kind of star Flouride-resistani acid phesphatase self-recovering type excessively stream/short-circuit protection circuit |
| CN107193314A (en) * | 2017-06-26 | 2017-09-22 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
-
2018
- 2018-12-26 CN CN201811598180.2A patent/CN109358695B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6917187B2 (en) * | 2002-11-21 | 2005-07-12 | Rohm Co., Ltd. | Stabilized DC power supply device |
| DE102004033980A1 (en) * | 2004-07-14 | 2006-02-16 | Infineon Technologies Ag | Control of an electrical load such as a light emitting diode has load current measured and compared with reference |
| CN101763128A (en) * | 2009-12-03 | 2010-06-30 | 深圳市大族激光科技股份有限公司 | Constant current source |
| CN104300788A (en) * | 2014-10-24 | 2015-01-21 | 电子科技大学 | Self-adaptation voltage regulator 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 |
| CN105843315A (en) * | 2016-05-11 | 2016-08-10 | 国神光电科技（上海）有限公司 | Constant current source control method and constant current source circuit |
| CN106207730A (en) * | 2016-09-05 | 2016-12-07 | 吉林大学 | A kind of high stability laser pumping source with overheat protection function |
| 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 kind of star Flouride-resistani acid phesphatase self-recovering type excessively stream/short-circuit protection circuit |
| CN107193314A (en) * | 2017-06-26 | 2017-09-22 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage |
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