CN103179756B - LED (light-emitting diode) linear constant current drive controller with wide input voltage range - Google Patents
LED (light-emitting diode) linear constant current drive controller with wide input voltage range Download PDFInfo
- Publication number
- CN103179756B CN103179756B CN201310088782.4A CN201310088782A CN103179756B CN 103179756 B CN103179756 B CN 103179756B CN 201310088782 A CN201310088782 A CN 201310088782A CN 103179756 B CN103179756 B CN 103179756B
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- semiconductor
- oxide
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to the field of LED (light-emitting diode) driving circuit design, and provides an LED linear constant current drive controller, with a wide input voltage range, and an LED driving device. The controller samples voltage output by a rectifying and filtering circuit through a voltage sampling circuit; if the voltage value is too high or too low, the voltage is regulated through a voltage regulation circuit, and then is output to an light-emitting diode unit which is served as load, so that normal breakover of the light-emitting diode unit is guaranteed, wide-range control to the voltage input to the rectifying and filtering circuit is also realized, and the controller is safe and reliable. Compared with a constant current drive controlling circuit of the existing flyback or DC-DC (direct current to direct current) buck-boost switching power supply, the LED linear constant current drive controller has the advantages that as a linear driving mode is adopted, an input circuit and an output circuit belong to an identical circuit, and the structure is simpler; and compared with the existing linear LED linear constant current driving control circuit, the LED linear constant current drive controller has the advantages that wide-range control to input voltage is realized, the applicability is higher, and circuits can not be burnt when the input voltage is too high.
Description
Technical field
The invention belongs to LED drive circuit design field, particularly relate to a kind of LED linear constant current driving governor and the LED drive device with wide input voltage range.
Background technology
At present, LED drive device has two kinds of implementations:
A kind of is the constant current Drive and Control Circuit of the Switching Power Supply class of inverse-excitation type or DC-DC buck.Owing to there is the energy-storage travelling wave tube such as transformer or inductance in this kind of circuit topological structure, the importation of circuit and output is made to be the current circuits separated, output voltage (namely as the voltage sum of the LED unit of load) is not by the restriction of input voltage, so input voltage can realize wide region change.But this kind of constant current Drive and Control Circuit complex structure, the circuit board volume taken is large, and cost is high, is unfavorable for producing and promoting.
Another kind is linear LED constant current Drive and Control Circuit.Existing linear LED constant current Drive and Control Circuit as shown in Figure 1, it comprises the rectifier bridge carrying out rectification process to input voltage Vac, be made up of diode D1, diode D2, diode D3 and diode D4, the voltage of rectifier bridge output is carried out to the electric capacity C1 of filtering process, and the LED unit as load is carried out to the constant-current controller of current constant control.Visible, the energy-storage travelling wave tube such as transless or inductance in such topological structure, thus importation and output coexist in a current circuit.When voltage sum as the LED unit of load must be less than input voltage amplitude, LED unit could be kept to have electric current to pass through, voltage due to LED unit is fixing, therefore input voltage amplitude can not lower than the voltage at LED unit two ends, thus make input voltage cannot realize wide region change.Simultaneously for fixing LED unit, if input voltage is too high, the loss of constant-current controller can be caused to strengthen, when working long hours, even can burn out constant-current controller, further limit the excursion of input voltage.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of LED linear constant current driving governor with wide input voltage range, be intended to solve in existing linear LED constant current Drive and Control Circuit, the amplitude of input voltage need be not less than the voltage at the LED unit two ends as load, and must not be too high in order to avoid circuit burnout, the problem of wide region change cannot be realized.
The embodiment of the present invention is achieved in that a kind of LED linear constant current driving governor with wide input voltage range, described in there is wide input voltage range LED linear constant current driving governor comprise:
Voltage sampling circuit, for sampling in LED drive device, the voltage that exports of current rectifying and wave filtering circuit, and exports sampled result signal;
Voltage regulator circuit, for according to described sampled result signal, after regulating, exports to the positive input terminal of the light emitting diode as load to the size of the voltage that described current rectifying and wave filtering circuit exports;
Constant-current control circuit, for carrying out current constant control to described light emitting diode.
Another object of the embodiment of the present invention is to provide a kind of LED drive device, comprises current rectifying and wave filtering circuit, and described LED drive device also comprises the LED linear constant current driving governor as above with wide input voltage range.
The voltage that the LED linear constant current driving governor of what the embodiment of the present invention provided have wide input voltage range is exported by voltage sampling circuit sampling current rectifying and wave filtering circuit, if its magnitude of voltage is too high or too low, after then adjusted by voltage regulator circuit, export to the light emitting diode as load, thus when ensureing light emitting diode normally, also achieve the wide region of the input voltage being input to current rectifying and wave filtering circuit adjustable, and safe and reliable.Relative to the constant current Drive and Control Circuit of the Switching Power Supply class of existing inverse-excitation type or DC-DC buck, this LED linear constant current driving governor with wide input voltage range have employed linear drive mode, input circuit and output loop are the same circuit, and thus structure is simpler; Relative to existing linear LED constant current Drive and Control Circuit, the wide region that this LED linear constant current driving governor with wide input voltage range achieves input voltage is adjustable, and application is stronger, and can not be too high and burn circuit due to input voltage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the linear LED constant current Drive and Control Circuit that prior art provides;
Fig. 2 is the circuit theory diagrams with the LED linear constant current driving governor of wide input voltage range that the embodiment of the present invention provides;
Fig. 3 is the circuit theory diagrams of voltage regulator circuit in Fig. 2;
Fig. 4 is the circuit diagram of voltage sampling circuit in Fig. 2;
Fig. 5 is the circuit diagram of voltage selecting circuit in Fig. 3;
Fig. 6 is the circuit diagram of constant-current control circuit in Fig. 2;
Fig. 7 is the circuit diagram of light emitting diode in Fig. 2.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
For prior art Problems existing, the present invention proposes a kind of LED linear constant current driving governor with wide input voltage range, its voltage exported by voltage sampling circuit sampling current rectifying and wave filtering circuit, if its magnitude of voltage is too high or too low, after then adjusted by voltage regulator circuit, export to the light emitting diode as load.
Fig. 2 shows the circuit theory with the LED linear constant current driving governor of wide input voltage range that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.
Specifically, the LED linear constant current driving governor of what the embodiment of the present invention provided have wide input voltage range comprises: voltage sampling circuit 12, the input of voltage sampling circuit 12 connects the output of current rectifying and wave filtering circuit, for sampling in LED drive device, the voltage Vinp that exports of current rectifying and wave filtering circuit, and export sampled result signal; Voltage regulator circuit 11, the input of voltage regulator circuit 11 connects the output of voltage sampling circuit 12, the power end of voltage regulator circuit 11 connects the output of current rectifying and wave filtering circuit, the output of voltage regulator circuit 11 connects the positive input terminal as the light emitting diode of load, for according to sampled result signal, after the size of the voltage Vinp that current rectifying and wave filtering circuit exports is regulated, export to the positive input terminal of light emitting diode; Constant-current control circuit 13, the negative input end of the input connecting luminous diode unit of constant-current control circuit 13, for carrying out current constant control to light emitting diode.
The LED linear constant current driving governor of what the embodiment of the present invention provided have wide input voltage range to be sampled the voltage that current rectifying and wave filtering circuit exports by voltage sampling circuit 12, if its magnitude of voltage is too high or too low, after then adjusted by voltage regulator circuit 11, export to the light emitting diode as load, thus when ensureing light emitting diode normally, also achieve the wide region of the input voltage being input to current rectifying and wave filtering circuit adjustable, and safe and reliable.Relative to the constant current Drive and Control Circuit of the Switching Power Supply class of existing inverse-excitation type or DC-DC buck, this LED linear constant current driving governor with wide input voltage range have employed linear drive mode, input circuit and output loop are the same circuit, and thus structure is simpler; Relative to existing linear LED constant current Drive and Control Circuit, the wide region that this LED linear constant current driving governor with wide input voltage range achieves input voltage is adjustable, and application is stronger, and can not be too high and burn circuit due to input voltage.
Fig. 3 further illustrates the circuit theory of voltage regulator circuit 11 in Fig. 2.
Particularly, voltage regulator circuit 11 can comprise: voltage selecting circuit 111, booster circuit 112 and/or reduction voltage circuit 113, voltage selecting circuit 111, the input of voltage selecting circuit 111 connects the output of voltage sampling circuit 12 as the input of voltage regulator circuit 11, the power end of voltage selecting circuit 111 connects the output of current rectifying and wave filtering circuit as the power end of voltage regulator circuit, the output of voltage selecting circuit 111 connects the positive input terminal as the light emitting diode of load as the output of voltage regulator circuit 11, the control end of voltage selecting circuit 111 connects booster circuit 112 and/or reduction voltage circuit 113, voltage selecting circuit 111 is for according to sampled result signal, if the voltage Vinp that current rectifying and wave filtering circuit exports is less than the second preset value, the voltage Vinp then controlling booster circuit 112 pairs of current rectifying and wave filtering circuits outputs carries out boosting process, and the voltage after process of being boosted by booster circuit 112 exports to the positive input terminal of light emitting diode, and/or according to sampled result signal, if the voltage Vinp that current rectifying and wave filtering circuit exports is greater than the first preset value, the voltage Vinp that then controlled hypotension circuit 113 pairs of current rectifying and wave filtering circuits export carries out step-down process, and the voltage after reduction voltage circuit 113 step-down process is exported to the positive input terminal of light emitting diode, voltage selecting circuit 111 is also for according to sampled result signal, if the voltage Vinp that current rectifying and wave filtering circuit exports is not more than the first preset value and is not less than the second preset value, the then direct positive input terminal voltage Vinp that current rectifying and wave filtering circuit exports being exported to light emitting diode.
Fig. 4 shows the circuit of voltage sampling circuit 12 in Fig. 2.
Particularly, voltage sampling circuit 12 can comprise: resistance R1, resistance R2, resistance R3, comparator U1 and comparator U2.Wherein, resistance R3, resistance R2 and resistance R1 are connected between the output of current rectifying and wave filtering circuit and ground successively, and one end of not being connected with resistance R2 of resistance R3 is as the input of voltage sampling circuit 12; One end that resistance R3 is connected with resistance R2 connect simultaneously the in-phase end of comparator U1+, the end of oppisite phase of comparator U1-connect the first reference voltage V rh; One end that resistance R2 is connected with resistance R1 connect simultaneously the in-phase end of comparator U2+, the end of oppisite phase of comparator U2-connect the second reference voltage V rl; The output of comparator U1 and the output of comparator U2 jointly as voltage sampling circuit 12 output and be connected the input of voltage selecting circuit 111.
Fig. 5 shows the circuit of voltage selecting circuit 111 in Fig. 3.
Particularly, voltage selecting circuit 111 can comprise: the metal-oxide-semiconductor Q5 of metal-oxide-semiconductor Q4, N raceway groove of metal-oxide-semiconductor Q3, N raceway groove of metal-oxide-semiconductor Q2, N raceway groove of metal oxide semiconductor field effect tube (hereinafter referred to as metal-oxide-semiconductor) Q1, N raceway groove of N raceway groove, with door U3, inverter U4, NOR gate U5 and NOR gate U6.Wherein, the drain electrode of the metal-oxide-semiconductor Q4 of N raceway groove, the drain electrode of the metal-oxide-semiconductor Q3 of N raceway groove are connected with the drain electrode of the metal-oxide-semiconductor Q1 of N raceway groove, and the common output connecting current rectifying and wave filtering circuit; The source electrode of the metal-oxide-semiconductor Q5 of N raceway groove, the source electrode of the metal-oxide-semiconductor Q3 of N raceway groove are connected with the source electrode of the metal-oxide-semiconductor Q2 of N raceway groove, and the positive input terminal of common connecting luminous diode unit; The grid of the metal-oxide-semiconductor Q4 of N raceway groove connects the grid of the metal-oxide-semiconductor Q5 of N raceway groove, and the output of common connection and door U3; The grid of the metal-oxide-semiconductor Q1 of N raceway groove connects the grid of the metal-oxide-semiconductor Q2 of N raceway groove, and the common output connecting NOR gate U6; The grid of the metal-oxide-semiconductor Q3 of N raceway groove connects the output of NOR gate U5; An input of NOR gate U5 and an input of NOR gate U6 is connected with an input of door U3, and the common output connecting voltage sampling circuit 12, with reference to figure 4, then connect the output of comparator U1; The input of inverter and another input of NOR gate U6 is connected with another input of door U3, and the common output connecting voltage sampling circuit 12, with reference to figure 4, then connect the output of comparator U2; The output of inverter U4 connects another input of NOR gate U5; The source electrode of the metal-oxide-semiconductor Q4 of N raceway groove is connected the source electrode of the metal-oxide-semiconductor Q1 of step-down voltage 113, N raceway groove with the drain electrode of the metal-oxide-semiconductor Q5 of N raceway groove and is connected booster circuit 112 with the drain electrode of the metal-oxide-semiconductor Q2 of N raceway groove.
Fig. 6 shows the circuit of constant-current control circuit 13 in Fig. 2.
Particularly, constant-current control circuit 13 comprises: the metal-oxide-semiconductor Q6 of error amplifier U7, N raceway groove and resistance R4.Wherein, the end of oppisite phase of in-phase end+connection the 3rd reference voltage V r3 of error amplifier U7, error amplifier U7-by resistance R4 ground connection, the output of error amplifier U7 connects the grid of the metal-oxide-semiconductor Q6 of N raceway groove; The drain electrode of the metal-oxide-semiconductor Q6 of N raceway groove is as the negative input end of the input connecting luminous diode unit of constant-current control circuit 13; The source electrode of the metal-oxide-semiconductor Q6 of N raceway groove connect the end of oppisite phase of error amplifier U7-.
Fig. 7 shows the circuit of light emitting diode in Fig. 2.
In the embodiment of the present invention, light emitting diode as load can comprise at least one group of light-emitting diode group, if when light emitting diode comprises two groups or more light-emitting diode group, this two groups or more light-emitting diode group connection parallel with one another.Each light-emitting diode group comprises again at least one light-emitting diode, if when light-emitting diode group comprises two or more light-emitting diode, these two or more light-emitting diode head and the tail connect in turn.The anode of light-emitting diode group is as the positive input terminal of light emitting diode, and the negative electrode of light-emitting diode group is as the negative input end of light emitting diode.
In the embodiment of the present invention, booster circuit 112 can adopt existing charge pump construction to realize, and can adopt one or more levels boost configuration, and concrete structure is known in this field, is not repeated herein; Reduction voltage circuit 113 can adopt existing linear voltage regulator structure, and concrete structure is known in this field, is not repeated herein.Below in conjunction with Fig. 4 to Fig. 7, describe the operation principle of foregoing circuit in detail:
Suppose that the first preset value is VH, the second preset value is VL, and has VH>VL.For voltage sampling circuit 12, when the output voltage Vinp of current rectifying and wave filtering circuit is lower than the second preset value VL, namely electric resistance partial pressure lower than comparator U2 end of oppisite phase-the second reference voltage V rl time, the output level EN1 of comparator U2 is low level (being designated as 0), now the output voltage Vinp of current rectifying and wave filtering circuit is lower than the first preset value VH, electric resistance partial pressure lower than comparator U1 end of oppisite phase-the first reference voltage V rh, therefore the output level EN2 of comparator U1 is low level (being designated as 0), then the sampled result signal that voltage sampling circuit 12 exports is 00; When the output voltage Vinp of current rectifying and wave filtering circuit is less than or equal to the first preset value VH and to be more than or equal to the second preset value be VL, namely electric resistance partial pressure lower than comparator U1 end of oppisite phase-the first reference voltage V rh, therefore the output level EN2 of comparator U1 is low level (being designated as 0), and electric resistance partial pressure higher than comparator U2 end of oppisite phase-the second reference voltage V rl time, therefore the output level EN1 of comparator U2 is high level (being designated as 1), then the sampled result signal that voltage sampling circuit 12 exports is 10; When the output voltage Vinp of current rectifying and wave filtering circuit is higher than the first preset value VH, namely electric resistance partial pressure higher than comparator U1 end of oppisite phase-the first reference voltage V rh, therefore the output level EN2 of comparator U1 is high level (being designated as 1), now the output voltage Vinp of current rectifying and wave filtering circuit is higher than the second preset value VL, namely electric resistance partial pressure higher than comparator U2 end of oppisite phase-the second reference voltage V rl, therefore the output level EN1 of comparator U2 is high level (being designated as 1), then the sampled result signal that voltage sampling circuit 12 exports is 11.
For voltage regulator circuit 11, when sampled result signal is 00, the metal-oxide-semiconductor Q1 of the N raceway groove of voltage selecting circuit 111 inside and the metal-oxide-semiconductor Q2 conducting of N raceway groove, the voltage V1a of output voltage Vinp after the metal-oxide-semiconductor Q1 of N raceway groove transmits of current rectifying and wave filtering circuit is input to booster voltage 112, after the voltage V1a of booster circuit 112 to input does boosting process, output voltage V1b outputs to the positive input terminal Voutp of light emitting diode through the metal-oxide-semiconductor Q2 of N raceway groove.When sampled result signal is 10, the metal-oxide-semiconductor Q3 conducting of the inner N raceway groove of voltage selecting circuit 111, the output voltage Vinp of current rectifying and wave filtering circuit outputs to the positive input terminal Voutp of light emitting diode through the metal-oxide-semiconductor Q3 of N raceway groove.When sampled result signal is 11, the metal-oxide-semiconductor Q4 of the inner N raceway groove of voltage selecting circuit 111 and the metal-oxide-semiconductor Q5 conducting of N raceway groove, the voltage V2a of output voltage Vinp after the metal-oxide-semiconductor Q4 of N raceway groove transmits of current rectifying and wave filtering circuit is input to step-down voltage 113, after reduction voltage circuit 113 pairs of input voltages do step-down process, output voltage V2b outputs to the positive input terminal Voutp of light emitting diode through the metal-oxide-semiconductor Q5 of N raceway groove.By the process of voltage regulator circuit 11, the output voltage Vinp of light-emitting diode list current rectifying and wave filtering circuit can be made to be change between VH and the second preset value VL at the first preset value, thus the wide region realizing input voltage is adjustable, and ensure that circuit can not be burned due to too high voltage fluctuation.
For constant-current control circuit 13, the value of the 3rd reference voltage V r3 wherein and the resistance of resistance R4 determine the constant current operation electric current of light emitting diode, suppose that this constant current operation electric current is I
led, then I is had
led=Vr3/R4.
The embodiment of the present invention additionally provides a kind of LED drive device, comprises current rectifying and wave filtering circuit as shown in Figure 1, and has the LED linear constant current driving governor of wide input voltage range as above, is not repeated herein.
The LED linear constant current driving governor of what the embodiment of the present invention provided have wide input voltage range to be sampled the voltage that current rectifying and wave filtering circuit exports by voltage sampling circuit 12, if its magnitude of voltage is too high or too low, after then adjusted by voltage regulator circuit 11, export to the light emitting diode as load, thus when ensureing light emitting diode normally, also achieve the wide region of the input voltage being input to current rectifying and wave filtering circuit adjustable, and safe and reliable.Relative to the constant current Drive and Control Circuit of the Switching Power Supply class of existing inverse-excitation type or DC-DC buck, this LED linear constant current driving governor with wide input voltage range have employed linear drive mode, input circuit and output loop are the same circuit, and thus structure is simpler; Relative to existing linear LED constant current Drive and Control Circuit, the wide region that this LED linear constant current driving governor with wide input voltage range achieves input voltage is adjustable, and application is stronger, and can not be too high and make and burn circuit due to input voltage.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can control to be correlated with by program completes, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. there is a LED linear constant current driving governor for wide input voltage range, it is characterized in that, described in there is wide input voltage range LED linear constant current driving governor comprise:
Voltage sampling circuit, input connects the output of current rectifying and wave filtering circuit in LED drive device, for the voltage that this current rectifying and wave filtering circuit of sampling exports, and exports sampled result signal;
Voltage regulator circuit, input connects the output of described voltage sampling circuit, power end connects the output of current rectifying and wave filtering circuit, output connects the positive input terminal as the light emitting diode of load, for according to described sampled result signal, after the size of the voltage that described current rectifying and wave filtering circuit exports is regulated, export to the positive input terminal of described light emitting diode;
Constant-current control circuit, input connects the negative input end of described light emitting diode, for carrying out current constant control to described light emitting diode;
Described voltage regulator circuit comprises voltage selecting circuit, and described voltage regulator circuit also comprises booster circuit and/or reduction voltage circuit;
Described voltage selecting circuit is used for according to described sampled result signal, if the voltage that described current rectifying and wave filtering circuit exports is less than the second preset value, then control described booster circuit and boosting process is carried out to the voltage that described current rectifying and wave filtering circuit exports, and the voltage after described booster circuit boosting process is exported to the positive input terminal of described light emitting diode, and/or according to described sampled result signal, if the voltage that described current rectifying and wave filtering circuit exports is greater than the first preset value, then control described reduction voltage circuit and step-down process is carried out to the voltage that described current rectifying and wave filtering circuit exports, and the voltage after described reduction voltage circuit step-down process is exported to the positive input terminal of described light emitting diode,
Described voltage selecting circuit comprises: the metal-oxide-semiconductor Q5 of metal-oxide-semiconductor Q4, N raceway groove of metal-oxide-semiconductor Q3, N raceway groove of metal-oxide-semiconductor Q2, N raceway groove of metal-oxide-semiconductor Q1, N raceway groove of N raceway groove, with door U3, inverter U4, NOR gate U5 and NOR gate U6;
The drain electrode of the drain electrode of the metal-oxide-semiconductor Q4 of described N raceway groove, the metal-oxide-semiconductor Q3 of described N raceway groove is connected with the drain electrode of the metal-oxide-semiconductor Q1 of described N raceway groove, and the common output connecting described current rectifying and wave filtering circuit; The source electrode of the source electrode of the metal-oxide-semiconductor Q5 of described N raceway groove, the metal-oxide-semiconductor Q3 of described N raceway groove is connected with the source electrode of the metal-oxide-semiconductor Q2 of described N raceway groove, and the common positive input terminal connecting described light emitting diode; The grid of the metal-oxide-semiconductor Q4 of described N raceway groove connects the grid of the metal-oxide-semiconductor Q5 of described N raceway groove, and common connection is described and the output of door U3; The grid of the metal-oxide-semiconductor Q1 of described N raceway groove connects the grid of the metal-oxide-semiconductor Q2 of described N raceway groove, and the common output connecting described NOR gate U6; The grid of the metal-oxide-semiconductor Q3 of described N raceway groove connects the output of described NOR gate U5; Describedly be connected an input of described NOR gate U5 and an input of described NOR gate U6 with an input of door U3, and the common output connecting described voltage sampling circuit; Describedly be connected the input of described inverter U4 and another input of described NOR gate U6 with another input of door U3, and the common output connecting described voltage sampling circuit; The output of described inverter U4 connects another input of described NOR gate U5; The source electrode of the metal-oxide-semiconductor Q4 of described N raceway groove is connected described step-down voltage with the drain electrode of the metal-oxide-semiconductor Q5 of described N raceway groove, and the source electrode of the metal-oxide-semiconductor Q1 of described N raceway groove is connected described booster circuit with the drain electrode of the metal-oxide-semiconductor Q2 of described N raceway groove.
2. there is the LED linear constant current driving governor of wide input voltage range as claimed in claim 1, it is characterized in that, described voltage selecting circuit is also for according to described sampled result signal, if the voltage that described current rectifying and wave filtering circuit exports is not more than the first preset value and is not less than the second preset value, then the direct positive input terminal voltage that described current rectifying and wave filtering circuit exports being exported to described light emitting diode.
3. have the LED linear constant current driving governor of wide input voltage range as claimed in claim 1, it is characterized in that, described voltage sampling circuit comprises: resistance R1, resistance R2, resistance R3, comparator U1 and comparator U2;
Between the output that described resistance R3, described resistance R2 and described resistance R1 are connected on described current rectifying and wave filtering circuit successively and ground; One end that described resistance R3 is connected with described resistance R2 connects the in-phase end of described comparator U1 simultaneously, and the end of oppisite phase of described comparator U1 connects the first reference voltage; One end that described resistance R2 is connected with described resistance R1 connects the in-phase end of described comparator U2 simultaneously, and the end of oppisite phase of described comparator U2 connects the second reference voltage; The output of described comparator U1 is connected the input of described voltage selecting circuit with the output of described comparator U2.
4. have the LED linear constant current driving governor of wide input voltage range as claimed in claim 1, it is characterized in that, described constant-current control circuit comprises: the metal-oxide-semiconductor Q6 of error amplifier U7, N raceway groove and resistance R4;
The in-phase end of described error amplifier U7 connects the 3rd reference voltage, and the end of oppisite phase of described error amplifier U7 is by described resistance R4 ground connection, and the output of described error amplifier U7 connects the grid of the metal-oxide-semiconductor Q6 of described N raceway groove; The drain electrode of the metal-oxide-semiconductor Q6 of described N raceway groove connects the negative input end of described light emitting diode; The source electrode of the metal-oxide-semiconductor Q6 of described N raceway groove connects the end of oppisite phase of described error amplifier U7.
5. there is the LED linear constant current driving governor of wide input voltage range as claimed in claim 1, it is characterized in that, described light emitting diode comprises at least one group of light-emitting diode group parallel with one another, and each light-emitting diode group comprises the light-emitting diode that at least one head and the tail connects in turn.
6. a LED drive device, comprises current rectifying and wave filtering circuit, it is characterized in that, described LED drive device also comprises the LED linear constant current driving governor with wide input voltage range as described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088782.4A CN103179756B (en) | 2013-03-19 | 2013-03-19 | LED (light-emitting diode) linear constant current drive controller with wide input voltage range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088782.4A CN103179756B (en) | 2013-03-19 | 2013-03-19 | LED (light-emitting diode) linear constant current drive controller with wide input voltage range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103179756A CN103179756A (en) | 2013-06-26 |
| CN103179756B true CN103179756B (en) | 2015-06-24 |
Family
ID=48639299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310088782.4A Active CN103179756B (en) | 2013-03-19 | 2013-03-19 | LED (light-emitting diode) linear constant current drive controller with wide input voltage range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103179756B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538252B (en) * | 2015-01-04 | 2016-08-31 | 河南中云创光电科技股份有限公司 | Drive circuit for catalyst |
| CN108633141A (en) * | 2018-06-30 | 2018-10-09 | 深圳市必拓电子股份有限公司 | One kind imitating linear LED drive circuit |
| CN108770132B (en) * | 2018-07-23 | 2023-11-03 | 深圳市明微电子股份有限公司 | LED full-voltage high-efficiency linear driving circuit |
| CN112399675A (en) * | 2020-12-01 | 2021-02-23 | 欧普照明股份有限公司 | Voltage control circuit and LED lighting system |
| CN113824314A (en) * | 2021-08-11 | 2021-12-21 | 北京新忆科技有限公司 | Charge pump circuit and control method thereof |
| CN114189961B (en) * | 2021-11-18 | 2023-08-11 | 浙江大华技术股份有限公司 | Current control circuit and monitoring equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100941509B1 (en) * | 2009-06-30 | 2010-02-10 | 주식회사 실리콘마이터스 | Reference voltage generation device, control device comprising the reference voltage generation device and led light emitting device using the control device |
| CN102014537B (en) * | 2009-09-14 | 2014-04-02 | 深圳市航嘉驰源电气股份有限公司 | Drive circuit of LED lamp |
| KR100948098B1 (en) * | 2009-09-29 | 2010-03-16 | 선광에이앤씨 주식회사 | Lighting circuit and protection device of led lighting apparatus and method for the same |
| JP5639389B2 (en) * | 2010-06-24 | 2014-12-10 | 株式会社光波 | LED driving device and LED lighting device |
| JP5537286B2 (en) * | 2010-06-28 | 2014-07-02 | パナソニック株式会社 | LED lighting device |
| CN102497695A (en) * | 2011-11-18 | 2012-06-13 | 上海晶丰明源半导体有限公司 | LED linear constant current control circuit and LED linear circuit |
| CN102364569B (en) * | 2011-11-21 | 2015-11-18 | 中航华东光电有限公司 | A kind of linear constant current Drive and Control Circuit and light-emitting diode display thereof |
| CN202799315U (en) * | 2012-09-18 | 2013-03-13 | 张翌 | Overshoot-free light-emitting diode (LED) linear constant current drive circuit |
-
2013
- 2013-03-19 CN CN201310088782.4A patent/CN103179756B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103179756A (en) | 2013-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103179756B (en) | LED (light-emitting diode) linear constant current drive controller with wide input voltage range | |
| CN103108470B (en) | Dynamic linear control light emitting diode (LED) driver circuit | |
| CN102474189B (en) | Low-cost electric source circuit and method | |
| CN103298195B (en) | Power supply for illumination and luminaire | |
| CN102255526B (en) | AC-DC power supply conversion chip and power switching circuit | |
| CN107094329A (en) | Led drive circuit | |
| TW202007064A (en) | Bidirectional DC-DC converter | |
| CN104349548A (en) | Lighting device and luminaire | |
| CN103458557A (en) | LED drive control circuit and LED lamp | |
| CN105357814A (en) | Peak current detection circuit and method for LED constant current driving circuit | |
| CN203072226U (en) | Dynamic-linear-control LED driving circuit | |
| CN103179755B (en) | A kind of LED linear constant current driving governor with High Power Factor | |
| CN201860261U (en) | Boost circuit | |
| CN205319941U (en) | Double - circuit voltage conversion control chip , double - circuit voltage conversion ware and electronic electric energy meter | |
| CN203289692U (en) | LED linear constant current driving controller with wide input voltage range and LED driving device | |
| CN203233572U (en) | High power factor LED linearity constant current driving controller and LED driving device | |
| CN101951150A (en) | Switch direct-current boosted circuit, boosted device and LED illuminating system | |
| CN101969723B (en) | Non-light-coupled two-stage light-emitting diode (LED) driver circuit with high power factor | |
| CN101997436B (en) | Multi-output fly-back power supply and secondary side rear voltage stabilizing circuit | |
| CN103889123A (en) | LED dimming circuit and LED lamp | |
| CN105811755A (en) | Step-down switching voltage regulator for improving transient response | |
| CN205726532U (en) | For controlling device and the system of diode | |
| CN203596744U (en) | LED array interface circuit comprising three-winding coupling inductor | |
| CN203632549U (en) | Energy-feedback LED array interface circuit | |
| CN102055324A (en) | Power control device and method using integral circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |