CN206237642U - A kind of constant-current supply of the various electric currents output for LED lamp - Google Patents
A kind of constant-current supply of the various electric currents output for LED lamp Download PDFInfo
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- CN206237642U CN206237642U CN201621268350.7U CN201621268350U CN206237642U CN 206237642 U CN206237642 U CN 206237642U CN 201621268350 U CN201621268350 U CN 201621268350U CN 206237642 U CN206237642 U CN 206237642U
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- current supply
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- 238000005070 sampling Methods 0.000 claims abstract description 26
- 239000004065 semiconductor Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000009514 concussion Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
A kind of constant-current supply of various electric currents output for LED lamp, it includes a DC/DC control module, an over-voltage detection circuit, a current sampling resistor, at least one output current translation circuit, and at least one overvoltage protection resistance.The output current translation circuit includes a switch, the metal-oxide-semiconductor that a grid is electrically connected with switch, and a current transformation sample resistance.The overvoltage protection resistant series are between described two voltage sampling resistors and the grid of metal-oxide-semiconductor.Constant-current supply of the present utility model can complete the output of various current values using described output current translation circuit, such that it is able to adapt to different LED loads so that a power supply can apply various occasions, both reduce production cost, resource is also saved, while being additionally favorable for the use of user.And due to the use of the overvoltage protection resistance, can avoid becoming big due to the power output of DC/DC control modules 10, and the damage or disaster hidden-trouble that may excessively cause that cause to generate heat.
Description
Technical field
The utility model is related to a kind of applied current field of lamp lighting, particularly a kind of for the various of LED lamp
The constant-current supply of electric current output.
Background technology
In general daily life, all visible various lighting apparatus everywhere, for example, fluorescent lamp, street lamp, desk lamp, art
Lamp etc..In above-mentioned lighting apparatus, traditionally major part is using osram lamp as illuminating source.In recent years, due to science and technology
Make rapid progress, by the use of light emitting diode (LED) as illuminating source.Notably, in addition to lighting apparatus, for general traffic number
Will, billboard, car light etc., are also changed to use light emitting diode as illuminating source.Using light emitting diode as luminous light
Source, it is advantageous in that power saving, and brightness is bigger, therefore in the upper gradually generalization of use.
But LED lamp is used as a kind of dc power losser, when being powered for it using civil power, generally typically will be by
The civil power is converted to the direct current that suitable LED lamp is used, or constant pressure, or constant current.In the prior art, by civil power
Wheel is changed to the galvanic power component generally DC/DC control modules that suitable LED lamp is used.The DC/DC control modules are
A kind of integrated circuit, it is internally provided with oscillator and copped wave module, controls its dutycycle to change using its internal concussion part
Become the size of output voltage, so as to reach the purpose of power output conversion.For example, allowing 10V to pass through in a time period, separately
10V is not allowed to pass through (be equal to 0v) in one time period.And there is an electric capacity to be filtered in output end, as long as electric capacity is sufficiently large,
Its result is equal to for that middle impulse waveform to carry out calculus, and exports a DC waveform of 5V.Existing DC/DC
Control module has many function inputs, such as overvoltage protection input, feedback input end etc..However, in actual use,
Because the difference of load, be using the constant-current supply of different current values, if a power supply only one of which current value, this is not only
The waste of resource can be caused, also very big cost can be caused to production, therefore, either user still produces commercial city and is desirable to
There is the output of multiple different current values in a constant-current supply.
Utility model content
In view of this, the utility model provide it is a kind of can provide the output of various current values for many of LED lamp
The constant-current supply of electric current output is planted, to solve above-mentioned technical problem.
A kind of constant-current supply of various electric currents output for LED lamp, it includes one for the constant electricity of controlled output
The DC/DC control modules of flow valuve, an over-voltage detection circuit being electrically connected with the DC/DC control modules, one is connected on
Current sampling resistor in the loop of the constant-current supply, at least one output current in parallel with the current sampling resistor becomes
Change circuit, and at least one is electrically connected at overvoltage protection between the output current translation circuit and over-voltage detection circuit
Resistance.The DC/DC control modules have over-voltage protecting function.The output current translation circuit includes a switch, one
The metal-oxide-semiconductor that grid is electrically connected with switch, an and drain electrode for being electrically connected at the metal-oxide-semiconductor is defeated with the constant-current supply
Current transformation sample resistance between going out.The source ground of the metal-oxide-semiconductor.The over-voltage detection circuit includes two electricity of series connection
Pressure sample resistance.The overvoltage protection input of the DC/DC control modules is electrically connected between two voltage connection sample resistance.Institute
Overvoltage protection resistant series are stated between described two voltage sampling resistors and the grid of metal-oxide-semiconductor.Each output current is converted
Circuit is all electrically connected with an overvoltage protection resistance.
Compared with prior art, constant-current supply of the present utility model can be completed using described output current translation circuit
The output of various current values, such that it is able to adapt to different LED loads a so that power supply can apply various occasions, both drop
Low production cost, also saves resource, while being additionally favorable for the use of user.And making due to the overvoltage protection resistance
With, can avoid becoming big due to the power output of DC/DC control modules 10, and the damage or fire that may excessively cause that cause to generate heat
Calamity hidden danger.
Brief description of the drawings
Below in conjunction with Description of Drawings embodiment of the present utility model, wherein：
A kind of principle frame of the constant-current supply of various electric currents output for LED lamp that Fig. 1 is provided for the utility model
Figure
Fig. 2 is a kind of circuit diagram of the constant-current supply of various electric currents output for LED lamp of Fig. 1.
Fig. 3 is a kind of simplified electrical circuit diagram of the constant-current supply of various electric currents output for LED lamp of Fig. 2.
Specific embodiment
Specific embodiment of the utility model is further elaborated below based on accompanying drawing.It should be appreciated that
Explanation to the utility model embodiment herein is not used to limit protection domain of the present utility model.
Fig. 1 to Fig. 2 is referred to, it is a kind of for LED lamp that the first embodiment that it is provided for the utility model is provided
The theory diagram and circuit diagram of the constant-current supply 100 of various electric current outputs.The perseverance of the various electric currents output for LED lamp
Stream power supply 100 includes a DC/DC control module 10 for being used for controlled output constant current value, and one controls with the DC/DC
The over-voltage detection circuit 20 that module 10 is electrically connected with, a current sampling electricity being connected in the loop of the constant-current supply 100
30, at least one output circuit translation circuits 40 in parallel with the current sampling resistor 30 are hindered, and at least one electrically connects
It is connected on the overvoltage protection resistance 50 between the output current translation circuit 40 and over-voltage detection circuit 20.It is understood that
The constant-current supply 100 also includes other some functional modules, is such as electrically connected at the front end of the DC/DC control modules 10
The transformer of input is to be supplied to the suitable voltage of DC/DC control modules 10, and rectification circuit, filter circuit, under-voltage protection are electric
Road etc., it is the technology known by those skilled in the art, be will not be repeated here.Simultaneously in the circuit shown in Fig. 1, also not
Above-mentioned circuit module is shown again, but had been shown in circuit diagram in fig. 2.
Fig. 3 can be in the lump referred to, for the ease of read circuit figure, Fig. 3 is the simplified electrical circuit diagram of Fig. 2, and Fig. 2 is electricity in kind
Lu Tu.The DC/DC control modules 10 include a DC/DC control chip N4, and some coordinate DC/DC control chips N4
The peripheral circuit of work.The DC/DC control chips N4 is known as described in those skilled in the art, its internal specific electricity
Line structure and operation principle are just no longer described in detail herein, and it has many inputs, such as voltage input end (VDD pin), and power is opened
Close output end (SW pin), overvoltage protection input (OVP pin), and constant current feedback input end (FB pin) etc..The peripheral circuit
For providing suitable working environment for the DC/DC control chips N4, as shown in Fig. 2 the electric capacity, the electricity that are electrically connected with EN pin
Resistance element, is that also VSS pin and INGND are grounded in order to the DC/DC control chips N4 can work.
The over-voltage detection circuit 20 is used to be provided for the DC/DC control modules 10 loop of whole constant-current supply 100
In voltage swing signal, with due course by the DC/DC control chips N4 trigger overvoltage protection switch so that right
Whole circuit carries out overvoltage protection.The over-voltage detection circuit 20 is electrical with the high level end of the output of DC/DC control modules 10
Connection, and including two voltage sampling resistor R42, R43 of series connection.This two the one of voltage sampling resistor R42, R43 of series connection
End is electrically connected with the high level output end of the constant-current supply 100, other end ground connection.According to general voltage sampling principle, institute
The OVP pin for stating DC/DC control chips N4 are electrically connected between described two sample resistance R42, R43.Under normal circumstances, plus
The voltage as sampling voltage on the sample resistance R43 is loaded in, because one end ground connection of sample resistance R43, voltage is 0.When
Voltage is raised in loop, and sampling voltage also raises, when more than over-pressed threshold set by the DC/DC control chips N4, should
Just switch-off power output switching terminal, i.e. SW pin turn off whole circuit loop to DC/DC control chips N4.
The current sampling resistor 30, i.e. resistance R51, it is connected in the loop of the constant-current supply 100, for obtaining
Size of current in the whole loop, and the current value is returned into the DC/DC control chips N4, i.e. DC/DC control chips
The constant current feedback input end of N4 is FB pin.According to the feedback, the DC/DC control chips N4 can control or adjust what it was exported
Current value is consistent, so as to reach the purpose of output constant current.Therefore, the constant current feedback input end and the one of current sampling resistor 30
End is electrically connected with.The DC/DC control chips N4 is damaged in order to ensure input voltage not to be too big, the constant current feed back input
End is the protective resistance R45 that also connected between FB pin and current sampling resistor 30.It is simple in order to sample, the resistance R51's
The other end is grounded, therefore, flow through the electric current I of R511=VFB/R51。
The output current translation circuit 40 is in parallel with the current sampling resistor 30, and switchs N5, one including one
The metal-oxide-semiconductor Q55 that grid is electrically connected with switch N5, and a drain electrode for being electrically connected at the metal-oxide-semiconductor Q5 and the constant current
Current transformation sample resistance R55 between the output of power supply 100.It is, of course, understood that in order to allow the output current to become
The normal work of circuit 40 is changed, it also includes some other function element, such as current-limiting resistance R71 can make metal-oxide-semiconductor stay open shape
Voltage-stabiliser tube D52 of state etc..To those skilled in the art, when have selected above-mentioned output current translation circuit 40, such as open
N5, metal-oxide-semiconductor Q55, resistance R55, and its electric connection method are closed, in order to it be able to will necessarily be added above-mentioned with normal work
Function component.Also, it should be noted that as shown in Fig. 2 the N5 be a kind of toggle switch, as the K1-1 and K1-2 that closes
When, Ze Gai K1 roads conducting, when close K2-1 and K2-2 when, then K2 roads conducting, by that analogy.It is understood, however, that described
Therein one or more can be simultaneously turned on or closed by K1 roads to K4 roads simultaneously, to obtain different outputs.The metal-oxide-semiconductor
The source ground of Q55, when switching N5 and disconnecting, the grid of metal-oxide-semiconductor Q55 is low level, therefore metal-oxide-semiconductor Q55 is turned off, the perseverance
The electric current flowed in the whole loop of power supply 100 is still I1.And when switch N5 closes, the grid of metal-oxide-semiconductor Q55 is high level,
Metal-oxide-semiconductor Q55 is turned on, and equivalent to short circuit, the electric current in the whole loop of the constant-current supply 100 will flow through resistance R55, thereon
The current value I of loading2=VFBCurrent value in/R55, therefore the whole loop of the constant-current supply 100 is I1With I2Sum.Cause
This, the current value in the whole loop of the constant-current supply 100 becomes big, reaches the purpose of current transformation.It is envisioned that
In the constant-current supply 100, multiple output current translation circuits 40, such as two can be included.The plurality of output current becomes
Change circuit 40 to be connected in parallel, so that the current value in the whole loop of the constant-current supply 100 is I1With flow through each
The sum of the electric current of current transformation sample resistance.When using switch N5 to switch each output current translation circuit 40, just can be with
The output of various different current values is obtained, reaching a constant-current supply 100 there can be the purpose of various outputs.
However, being only current sampling resistor due to being fed back obtained by the constant current feedback input end of DC/DC control chips N4
The upper current value I of R511But, actually after switch N5 at least closes all the way, the output current value of the constant-current supply 100
Increase, therefore the power of output can also increase, so as to heating can be caused excessive and other each electronic components are damaged, or even draw
The security incidents such as ignition calamity.Therefore constant-current supply of the present utility model 100 is also electrically connected at the output current including one
Overvoltage protection resistance 50 between translation circuit 40 and over-pressed detection resistance 20, i.e. the resistance R60 of Fig. 2.Specifically, the overvoltage
Protective resistance 50 is connected between the centre of described two voltage sampling resistor R42, R43 and the grid of metal-oxide-semiconductor Q55.Specific work
It is that, when switching N5 and being all off, the grid voltage of metal-oxide-semiconductor Q55, close to 0, is low level, is off state as principle,
Also no electric current flows through on the overvoltage protection resistance 20.When switch N5 at least closes all the way, as described above, the constant current
The output current of power supply 100 increased, and the voltage of the grid of metal-oxide-semiconductor Q55 is increased to certain value, and in this circuit, it is increased to
The voltage stabilizing value of voltage-stabiliser tube D52, and in the presence of the voltage, there is a small control electric current to flow through the overvoltage protection resistance
50, so that adds additional a voltage drop on voltage sampling resistor R43, and then make the overvoltage guarantor of DC/DC control chips N4
The current potential for protecting input increases.It is assumed that the overvoltage protection resistance 50 is not electrically connected with, the mistake of the DC/DC control chips N4
The current potential of pressure protection input will start overvoltage protection when being 1.4 volts, and increased the overvoltage protection resistance 50 so that voltage
A voltage drop is adds additional on sample resistance R43, for only voltage sampling resistor R42, R43, is loaded thereon
Voltage be also not reaching to 1.4 volts the DC/DC control chips N4 will be made to start overvoltage protection so that the constant-current supply
While 100 maximum output current increases, maximum output voltage reduction, power output is restricted, so as to avoid hair
It is hot excessively to damage.The voltage for being loaded on the overvoltage protection resistance 50 simultaneously comes from the voltage of the grid point of metal-oxide-semiconductor Q55, its
Voltage is relevant with the circuit design of whole output current translation circuit 40, and can not be the random voltage for setting, and otherwise can
The constant-current supply 100 is set to be difficult to start or not work.It is envisioned that when the constant-current supply 100 includes that multiple is described
During output current translation circuit 40, each output current translation circuit 40 is electrically connected with an overvoltage protection resistance 50.
As it was previously stated, the DC/DC control chips N4 is to control its dutycycle defeated to change using its internal concussion part
Go out the size of voltage, thus its in a certain period, it is no power output, and for the stationarity of output, the Constant Electric Current
Also connected an accumulation of energy inductance L5 in the output end of the DC/DC control modules 10 in source 100.One end of the accumulation of energy inductance and mistake
Pressure detection circuit 20 is electrically connected with, and the other end is electrically connected with the power switch output end of DC/DC control chips N4.Meanwhile, institute
Stating constant-current supply 100 also includes a storage stream diode D50 being connected between one end of the accumulation of energy inductance L5 and ground, described
The minus earth of diode D50.
Compared with prior art, constant-current supply of the present utility model 100 can using described output current translation circuit 40
To complete the output of various current values, such that it is able to adapt to different LED loads so that a power supply can apply various fields
Close, both reduce production cost, resource is also saved, while being additionally favorable for the use of user.And due to overvoltage protection electricity
The use of resistance 50, can avoid becoming big due to the power output of DC/DC control modules 10, and cause to generate heat what may excessively be caused
Damage or disaster hidden-trouble.
Preferred embodiment of the present utility model is these are only, is not used to limit to protection domain of the present utility model, it is any
Modification, equivalent or improvement in the utility model spirit etc., all cover in right of the present utility model.
Claims (8)
1. a kind of constant-current supply that various electric currents for LED lamp are exported, the constant-current supply is defeated for controlling including one
Go out the DC/DC control modules of constant current value, the DC/DC control modules have over-voltage protecting function, it is characterised in that：It is described
Constant-current supply also includes an over-voltage detection circuit being electrically connected with the DC/DC control modules, and one is connected on the perseverance
Flow the current sampling resistor in the loop of power supply, at least one output current conversion electricity in parallel with the current sampling resistor
Road, and at least one overvoltage protection being electrically connected between the output current translation circuit and over-voltage detection circuit is electric
Resistance, the output current translation circuit includes a switch, the metal-oxide-semiconductor that a grid is electrically connected with switch, and an electricity
Property be connected to the metal-oxide-semiconductor drain electrode and the output of the constant-current supply between current transformation sample resistance, the metal-oxide-semiconductor
Source ground, the over-voltage detection circuit includes two voltage sampling resistors of series connection, the overvoltage guarantor of the DC/DC control modules
Shield input is electrically connected between two voltage connection sample resistance, and the overvoltage protection resistant series are in described two voltage samplings
Between resistance and the grid of metal-oxide-semiconductor, each output current translation circuit is electrically connected with an overvoltage protection resistance.
2. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 1 are exported, it is characterised in that：The DC/
DC control modules include a constant current feedback input end, and the constant current feedback input end electrically connects with one end of current sampling resistor
Connect.
3. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 2 are exported, it is characterised in that：The perseverance
Flow a protective resistance of also being connected between feedback input end and current sampling resistor.
4. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 1 are exported, it is characterised in that：The perseverance
Stream power supply is also connected an accumulation of energy inductance in the output end of the DC/DC control modules, one end and the overvoltage of the accumulation of energy inductance
Detection circuit is electrically connected with.
5. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 4 are exported, it is characterised in that：The perseverance
Stream power supply also includes a storage stream diode being connected between one end of the accumulation of energy inductance and ground, the negative electrode of the diode
Ground connection.
6. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 1 are exported, it is characterised in that：The perseverance
Stream power supply includes two output current translation circuits, and two output current translation circuits are connected in parallel.
7. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 6 are exported, it is characterised in that：Each
The overvoltage protection resistance being connected with the output current translation circuit is all electrically connected at each output current translation circuit
Between the grid and over-voltage detection circuit of metal-oxide-semiconductor.
8. the constant-current supply that the various electric currents for being used for LED lamp as claimed in claim 1 are exported, it is characterised in that：The mistake
Pressure detection circuit is electrically connected with the high level end of the output of DC/DC control modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621268350.7U CN206237642U (en) | 2016-11-23 | 2016-11-23 | A kind of constant-current supply of the various electric currents output for LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621268350.7U CN206237642U (en) | 2016-11-23 | 2016-11-23 | A kind of constant-current supply of the various electric currents output for LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN206237642U true CN206237642U (en) | 2017-06-09 |
Family
ID=58980703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621268350.7U Withdrawn - After Issue CN206237642U (en) | 2016-11-23 | 2016-11-23 | A kind of constant-current supply of the various electric currents output for LED lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106413201A (en) * | 2016-11-23 | 2017-02-15 | 赛尔富电子有限公司 | Constant-current power supply with various current outputs for LED lamps |
-
2016
- 2016-11-23 CN CN201621268350.7U patent/CN206237642U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106413201A (en) * | 2016-11-23 | 2017-02-15 | 赛尔富电子有限公司 | Constant-current power supply with various current outputs for LED lamps |
| CN106413201B (en) * | 2016-11-23 | 2024-04-09 | 赛尔富电子有限公司 | Constant-current power supply for outputting various currents of LED lamp |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170609 Effective date of abandoning: 20240409 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170609 Effective date of abandoning: 20240409 |