CN205749735U - A kind of LED driver test load circuit - Google Patents
A kind of LED driver test load circuit Download PDFInfo
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- CN205749735U CN205749735U CN201620555197.XU CN201620555197U CN205749735U CN 205749735 U CN205749735 U CN 205749735U CN 201620555197 U CN201620555197 U CN 201620555197U CN 205749735 U CN205749735 U CN 205749735U
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Abstract
The utility model discloses a kind of LED driver test load circuit, include input module, amplification module and display module, wherein, described input module, include the first input end A being connected with the equipment of being detected and the second input B, for obtaining voltage and current parameter the output detections signal of detected equipment；Described amplification module, includes multiple direct current amplifier, couples and in response to input module, receives detection signal, for being amplified detection signal；Described display module, includes some light emitting diodes, couples and in response to amplification module, carries out judging the current parameters power of detected equipment by the light on and off number of light emitting diode；Solve and existing detection relatively complicated is added the problem that money is more expensive.
Description
Technical field
This utility model relates to technical field of measurement and test, more specifically, it relates to a kind of LED driver test load electricity
Road.
Background technology
LED driver, refers to that the power supply driving LED luminous or LED module assembly normally works adjusts electronic device.Due to
The on state characteristic of LED PN junction determines, the voltage and current mobility scale of its adaptable power supply is the narrowest, is just off slightly from
Possibly cannot light LED or luminous efficiency seriously reduces, or reduction of service life even burns chip.Existing power frequency electric
Source and common battery supply are all not suitable for directly feeding LED, and LED driver is exactly that this LED that can order about is in optimum voltage
Or the electronic building brick worked under current status.
The detection of existing LED driver generally requires and uses specific detecting instrument, relatively complicated same during operation
Time expensive.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide a kind of LED driver test load
Circuit, solves and existing relatively complicated detection is added the problem that money is more expensive.
For achieving the above object, this utility model provides following technical scheme:
A kind of LED driver test load circuit, includes input module, amplification module and display module, wherein,
Described input module, includes the first input end A being connected with the equipment of being detected and the second input B, is used for obtaining
Take voltage and current parameter the output detections signal of detected equipment；
Described amplification module, includes multiple direct current amplifier, couples and in response to input module, receives detection signal,
For detection signal is amplified；
Described display module, includes some light emitting diodes, couples and in response to amplification module, passes through light emitting diode
Light on and off number carry out the current parameters power of detected equipment is judged.
Further, switch element, described switch element it are coupled with between described first input end A and the second input B
Including closing that the switchblade knife coupled with first input end A and the some and switchblade knife that couples with the second input B coordinate
Close contact, between described different Guan Bi contacts and first input end A, be coupled with the resistance of different resistance.
Further, described amplification module includes crystal triode VQ1, crystal triode VQ2, crystal triode VQ3
With crystal triode VQ4,
Described crystal triode VQ1 and crystal triode VQ3 constitutes the first straight Rhizoma Nelumbinis formula direct current amplifier；
Described crystal triode VQ2 and crystal triode VQ4 constitutes the second straight Rhizoma Nelumbinis formula direct current amplifier.
Further, short interruption alarm module it is coupled with between described switch element and input module.
Further, described short interruption alarm module includes the second operational amplifier U2, the second operational amplifier U2
One in-phase input end is connected with supply voltage by the second slide rheostat VR2, and the first outfan connects has short-circuit alarming to connect
Mouth S3；Second outfan of described second operational amplifier U2 and the second in-phase input end phase of described 3rd operational amplifier U3
Connect；Second reverse input end of described 3rd operational amplifier U3 is connected with supply voltage by the 3rd slide rheostat VR3
Connecing, its second outfan connects breaking alarming interface S4.
Further, described input module is provided with the diode for providing overload protection.
Further, the inflow of the luminous number of the brightness of described light emitting diode and light emitting diode and input module
Electric current is directly proportional.
The beneficial effects of the utility model are, A, the B in circuit is current input terminal to be measured, transistor VQ1, VQ3 with
VQ2, VQ4 separately constitute the common emitter direct coupled type direct current amplifier of two groups, light emitting diode VD1 ~ VD5 and VD6 ~ VD10 conduct
The display components and parts of both direction electric current, when tested electric current flows to B from input A, transistor VQ2 base potential reduces, work
Making electric current to decline, VQ4 ends therewith then, and light emitting diode VD6 ~ VD10 is the most luminous without operating current.And at this moment VQ1 base
Electrode potential raises, and makes VQ1, VQ3 be in magnifying state, has enough electric currents to flow through the colelctor electrode of VQ3, and light emitting diode VD1 ~
VD5 conductive luminous shows.The brightness of light emitting diode and luminous number are approximately in proportion with the electric current of input person who lives in exile.The most defeated
Entering electric current hour, the number of lumination of light emitting diode is few and brightness is the least；When input current is big, show the individual of luminous diode
Number is many and brightness is big.When input current changes from small to large, luminous order is VD1, VD2 ~ VD5, and brightness is accordingly by little
Become big；When input current changes from big to small, the brightness of light emitting diode is the most dimmed until extinguishing, order be VD5, VD4 ~
VD1, the most lively, directly perceived.When input current B flows to A, the operating current of transistor VQ1, VQ3 declines, light emitting diode
VD1 ~ VD5 is the most luminous, and VQ3, VQ4 are in magnifying state, light emitting diode VD6 ~ VD10 luminescence display, and its process is with aforementioned
Process is identical.Worked accordingly by VQ1, VQ3, VD1 ~ VD6 with VQ2, these both sides of VQ4, VD6 ~ VD10, demonstrate brightly
The size and Orientation of tested electric current.For meeting lecture experiment needs, it is also provided with 3 range gears available, and has two poles
Tube overload protection.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present embodiment；
Fig. 2 is the input module circuit theory diagrams of the present embodiment；
Fig. 3 is the amplification module circuit theory diagrams of the present embodiment；
Fig. 4 is the display module circuit theory diagrams of the present embodiment；
Fig. 5 is the short interruption alarm module of the present embodiment.
Reference: 110, input module；111, switch element；210, amplification module；310, display module；410, short circuit
Breaking alarming module.
Detailed description of the invention
Referring to the drawings embodiment is described further.
Referring to figs. 1 through Fig. 5, in LED driver test load circuit, mainly include input module 110, amplification module
210 and display module 310, wherein, described input module 110, include the first input end A being connected with the equipment of being detected and
Two input B, for obtaining voltage and current parameter the output detections signal of detected equipment；Amplification module 210, includes
Multiple direct current amplifiers, couple and in response to input module 110, receive detection signal, for being amplified detection signal；Aobvious
Show module 310, include some light emitting diodes, couple and in response to amplification module 210, by the light on and off of light emitting diode
Number carries out judging the current parameters power of detected equipment.
Being coupled with switch element 111 between first input end A and the second input B, described switch element 111 includes and the
Switchblade knife that one input A couples and the Guan Bi contact that the some and switchblade knife coupled with the second input B coordinates, institute
State the resistance being coupled with different resistance between different Guan Bi contact and first input end A.
Amplification module 210 includes crystal triode VQ1, crystal triode VQ2, crystal triode VQ3 and crystal three pole
Pipe VQ4, crystal triode VQ1 and crystal triode VQ3 constitute the first straight Rhizoma Nelumbinis formula direct current amplifier；Crystal triode VQ2 and crystalline substance
Body audion VQ4 constitutes the second straight Rhizoma Nelumbinis formula direct current amplifier；Short circuit it is coupled with disconnected between switch element 111 and input module 110
Road alarm module 410；Short interruption alarm module 410 includes the second operational amplifier U2, and the second operational amplifier U2 first is same
Phase input is connected with supply voltage by the second slide rheostat VR2, and the first outfan connects short-circuit alarming interface S3；
Second outfan of described second operational amplifier U2 is connected with second in-phase input end of described 3rd operational amplifier U3；
Second reverse input end of described 3rd operational amplifier U3 is connected with supply voltage by the 3rd slide rheostat VR3, its
Second outfan connects breaking alarming interface S4；Input module 110 is provided with the diode for providing overload protection；Luminous
The brightness of diode and the luminous number of light emitting diode are directly proportional to the inflow current of input module 110.
A, B in circuit is current input terminal to be measured.Transistor VQ1, VQ3 and VQ2, VQ4 separately constitute sending out altogether of both sides
Emitter-base bandgap grading direct coupled type direct current amplifier, light emitting diode VD1 ~ VD5 and VD6 ~ VD10 is as the display components and parts of both direction electric current.
When tested electric current flows to B from input A, transistor VQ2 base potential reduces, and operating current declines, and VQ4 cuts therewith then
Only, light emitting diode VD6 ~ VD10 is the most luminous without operating current.And at this moment VQ1 base potential raises, VQ1, VQ3 is made to be in
Magnifying state, has enough electric currents to flow through the colelctor electrode of VQ3, and light emitting diode VD1 ~ VD5 conductive luminous shows.Light emitting diode
Brightness and luminous number approximately in proportion with the electric current of input person who lives in exile.I.e. input current hour, lumination of light emitting diode
Number few and brightness is the least；When input current is big, the number of the diode that display is luminous is many and brightness is big.Input current is from little
To when changing greatly, luminous order is VD1, VD2 ~ VD5, and brightness is changed from small to big accordingly；Input current changes from big to small
Time, the brightness of light emitting diode is the most dimmed, and until extinguishing, order is VD5, VD4 ~ VD1, the most lively, directly perceived.When input electricity
When stream B flows to A, the operating current of transistor VQ1, VQ3 declines, and light emitting diode VD1 ~ VD5 is the most luminous, and VQ3, VQ4 are in
Magnifying state, light emitting diode VD6 ~ VD10 luminescence display, its process is identical with aforementioned process.By VQ1, VQ3, VD1 ~ VD6
Work accordingly with these both sides of VQ2, VQ4, VD6 ~ VD10, demonstrate the size and Orientation of tested electric current brightly.Drill for meeting
Show experiment needs, be also provided with 3 range gears available, and have diode overload protection.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. a LED driver test load circuit, is characterized in that: include input module (110), amplification module (210) and
Display module (310), wherein,
Described input module (110), includes the first input end A being connected with the equipment of being detected and the second input B, is used for obtaining
Take voltage and current parameter the output detections signal of detected equipment；
Described amplification module (210), includes multiple direct current amplifier, couples and in response to input module (110), receives detection
Signal, for being amplified detection signal；
Described display module (310), includes some light emitting diodes, couples and in response to amplification module (210), by luminescence
The light on and off number of diode carries out judging the current parameters power of detected equipment.
A kind of LED driver test load circuit the most according to claim 1, is characterized in that: described first input end A with
Be coupled with switch element between second input B, described switch element include the switchblade knife that couples with first input end A and
The Guan Bi contact that the some and switchblade knife coupled with the second input B coordinates, described different Guan Bi contacts and first input end A
Between be coupled with the resistance of different resistance.
A kind of LED driver test load circuit the most according to claim 1, is characterized in that: described amplification module (210)
Include crystal triode VQ1, crystal triode VQ2, crystal triode VQ3 and crystal triode VQ4,
Described crystal triode VQ1 and crystal triode VQ3 constitutes the first straight Rhizoma Nelumbinis formula direct current amplifier；
Described crystal triode VQ2 and crystal triode VQ4 constitutes the second straight Rhizoma Nelumbinis formula direct current amplifier.
A kind of LED driver test load circuit the most according to claim 1, is characterized in that: switch element and input mould
Short interruption alarm module (410) it is coupled with between block (110).
A kind of LED driver test load circuit the most according to claim 4, is characterized in that: short interruption alarm module
(410) including the second operational amplifier U2, second operational amplifier U2 the first in-phase input end passes through the second slide rheostat VR2
Being connected with supply voltage, second operational amplifier U2 the first outfan connects short-circuit alarming interface S3；Second operation amplifier
Second outfan of device U2 and second in-phase input end of the 3rd operational amplifier U3 are connected；The of 3rd operational amplifier U3
Two reverse input ends are connected with supply voltage by the 3rd slide rheostat VR3, the 3rd operational amplifier U3 the second outfan
Connect and have breaking alarming interface S4.
A kind of LED driver test load circuit the most according to claim 1, is characterized in that: described input module (110)
It is provided with the diode for providing overload protection.
A kind of LED driver test load circuit the most according to claim 1, is characterized in that: described light emitting diode
The luminous number of brightness and light emitting diode is directly proportional to the inflow current of input module (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620555197.XU CN205749735U (en) | 2016-06-08 | 2016-06-08 | A kind of LED driver test load circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620555197.XU CN205749735U (en) | 2016-06-08 | 2016-06-08 | A kind of LED driver test load circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749735U true CN205749735U (en) | 2016-11-30 |
Family
ID=57359974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620555197.XU Active CN205749735U (en) | 2016-06-08 | 2016-06-08 | A kind of LED driver test load circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749735U (en) |
-
2016
- 2016-06-08 CN CN201620555197.XU patent/CN205749735U/en active Active
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