CN205320340U - Silicon controlled rectifier dimming circuit - Google Patents
Silicon controlled rectifier dimming circuit Download PDFInfo
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- CN205320340U CN205320340U CN201620062310.0U CN201620062310U CN205320340U CN 205320340 U CN205320340 U CN 205320340U CN 201620062310 U CN201620062310 U CN 201620062310U CN 205320340 U CN205320340 U CN 205320340U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract description 13
- 229910052710 silicon Inorganic materials 0.000 title abstract description 13
- 239000010703 silicon Substances 0.000 title abstract description 13
- 230000008033 biological extinction Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 26
- 230000001012 protector Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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Abstract
The utility model discloses a silicon controlled rectifier dimming circuit, silicon controlled rectifier dimming circuit includes power module, rectifier module, the module of adjusting luminance and constant -current module, power module is used for providing an input voltage, the module of adjusting luminance is connected with the power module electricity, the module of adjusting luminance is used for exporting power module carries out phase cut for rectifier module's input voltage and adjusts luminance in order realizing, rectifier module is connected with the module electricity of adjusting luminance, rectifier module is used for carrying out the rectification with output Rectifier voltage with the voltage of the module output of adjusting luminance, constant -current module is connected with the rectifier module electricity, be used for driving the load, and the feasible electric current that flows through the load is the constatn value, silicon controlled rectifier dimming circuit still includes: the module of releasing is connected with rectifier module and constant -current module electricity, the module of releasing is used for according to the big minor tune -up of electric current that flows past constant -current module electric current or the shutoff of the module module of releasing of releasing of flowing through to the adjust luminance extinction current of module work of the electric current that the module of releasing is flow through to the messenger and the electric current sum more than or equal to who flows through constant -current module.
Description
Technical field
The utility model relates to electronic technology field, especially especially, relates to a kind of thyristor regulating optical circuit.
Background technology
It is the LED driving power for compatible electronic controllable silicon dimmer that controllable silicon light modulation class LED drives chip. Current existing method is the light modulation scheme based on Switching Power Supply, but Switching Power Supply can exist following defect: 1) device is more, the more difficult small size of accomplishing; 2) conduct radiation is not easy to reach requirement; 3) cost is high, cost performance is low; 4) temperature of bleeder is not controlled, easily causes fault, and then causes whole system normally to work.
Therefore, need a kind of novel thyristor regulating optical circuit badly to address the above problem.
Utility model content
The purpose of this utility model is, for problems of the prior art, a kind of thyristor regulating optical circuit is provided, its by silicon controlled On current is provided and in conjunction with peripheral circuit to realize dynamic adjustment silicon controlled holding circuit, thereby obtain lower driving cost, better compatible. And, there is the feature of reliable, stable and high performance-price ratio.
To achieve these goals, the utility model provides a kind of thyristor regulating optical circuit, described thyristor regulating optical circuit comprises a power module, one rectification module, one light-adjusting module and a constant flow module, described power module is in order to provide an input voltage, described light-adjusting module is electrically connected with described power module, described light-adjusting module carries out cut to realize light modulation for the input voltage of described power module being exported to described rectification module, described rectification module is electrically connected with described light-adjusting module, described rectification module is for carrying out rectification with output commutating voltage by the voltage of described light-adjusting module output, described constant flow module is electrically connected with described rectification module, be used for driving load, and the electric current that makes to flow through load is steady state value, described thyristor regulating optical circuit comprises: the module of releasing, be electrically connected with described rectification module and constant flow module respectively, the described module of the releasing module of releasing for the electric current of the module of releasing described in flowing through according to the size of current adjustment of flowing through constant flow module or described in turn-offing, so that the electric current of the module of releasing described in flowing through and the electric current sum that flows through described constant flow module are more than or equal to the extinction current of described light-adjusting module work.
In an embodiment of the present utility model, the module of releasing described in described constant flow module is electrically connected to by one first resistance.
In an embodiment of the present utility model, described in the module of releasing comprise: a MOS transistor and an operational amplifier; The grid of described MOS transistor is electrically connected to the output of described operational amplifier, and the source electrode of described MOS transistor is electrically connected to the electrode input end of described operational amplifier, and the drain electrode of described MOS transistor is electrically connected to described rectification module; The negative input of described operational amplifier connects a reference voltage.
In an embodiment of the present utility model, the drain electrode of described MOS transistor is electrically connected to described rectification module by one second resistance.
In an embodiment of the present utility model; the described module of releasing further comprises an over-temperature protection unit; the negative input of the operational amplifier of the module of releasing described in described over-temperature protection unit is electrically connected to; described over-temperature protection unit is in order to the temperature of the module of releasing described in detecting, and when described in release when the temperature of module is greater than a design temperature threshold value and send an overheat protector signal to the module of releasing.
In an embodiment of the present utility model; described over-temperature protection unit comprises a current source; described current source is electrically connected with the negative input of described operational amplifier; described current source for when described in release the temperature of module while being greater than a design temperature threshold value, described current source provides the extremely negative input of described operational amplifier of an electric current.
In an embodiment of the present utility model, described constant flow module and described in the module of releasing be arranged on same chip.
In an embodiment of the present utility model, described constant flow module and described in the module of releasing be separately positioned on different chips.
Brief description of the drawings
Fig. 1 is the frame diagram of thyristor regulating optical circuit described in the utility model;
Fig. 2 is the circuit connection diagram of thyristor regulating optical circuit described in the utility model.
Detailed description of the invention
The detailed description of the invention of thyristor regulating optical circuit the utility model being provided below in conjunction with accompanying drawing elaborates.
Shown in Figure 1, the utility model provides a kind of thyristor regulating optical circuit, and described thyristor regulating optical circuit comprises a power module 10, a rectification module 30, a light-adjusting module 20 and a constant flow module 40.
Described power module 10 comprises an AC power, and described power module 10 is in order to provide an input voltage.
Described light-adjusting module 20 is electrically connected with described power module 10, described light-adjusting module 20 comprises a controllable silicon dimmer 21, and described controllable silicon dimmer 21 carries out cut to realize light modulation for the input voltage of described power module 10 being exported to described rectification module 30.
Described rectification module 30 is electrically connected with described light-adjusting module 20, and described rectification module 30 carries out rectification with output commutating voltage for the voltage that described light-adjusting module 20 is exported. In the present embodiment, described rectification module 30 comprises a rectifier bridge, and wherein said rectifier bridge comprises one first diode D1, one second diode D2, one the 3rd diode D3 and one the 4th diode D4; The negative pole of described the first diode D1 is connected with the negative electricity of described the second diode D2, the positive pole of described the second diode D2 is connected with the negative electricity of described the 3rd diode D3, the positive pole of described the 3rd diode D3 is electrically connected with the positive pole of described the 4th diode D4, and the negative pole of described the 4th diode D4 is electrically connected with the positive pole of described the first diode D1.
Described constant flow module 40 is electrically connected with described rectification module 30, and for driving load, and the electric current that makes to flow through load is steady state value.
Described thyristor regulating optical circuit comprises: the module 50 of releasing, be electrically connected with described rectification module 30 and constant flow module 40 respectively, the described module 50 of the releasing module 50 of releasing for the electric current of the module 50 of releasing described in flowing through according to the size of current adjustment of flowing through constant flow module 40 or described in turn-offing, so that the electric current of the module 50 of releasing described in flowing through is more than or equal to the electric current sum that flows through described constant flow module 40 extinction current that described light-adjusting module 20 is worked.
Circuit connecting relation and the operation principle of thyristor regulating optical circuit will be illustrated below.
Referring to Fig. 2 and in conjunction with shown in Fig. 1, in the present embodiment, the module 50 of releasing described in described constant flow module 40 is electrically connected to by one first resistance R 1.
The described module 50 of releasing comprises: a MOS transistor M1 and an operational amplifier OP1. The grid of described MOS transistor M1 is electrically connected to the output of described operational amplifier OP1, the source electrode of described MOS transistor M1 is electrically connected to the electrode input end of described operational amplifier OP1, and the drain electrode of described MOS transistor M1 is electrically connected to described rectification module 30 by one second resistance R 2. Certainly,, in other parts embodiment, the drain electrode of described MOS transistor M1 also can directly be electrically connected to described rectification module 30. The negative input of described operational amplifier OP1 meets a reference voltage V ref. The electrode input end of described operational amplifier OP1 is electrically connected to described constant flow module 40 by described the first resistance R 1.
Optionally; the described module 50 of releasing further comprises an over-temperature protection unit 51; the negative input of the operational amplifier OP1 of the module 50 of releasing described in described over-temperature protection unit 51 is electrically connected to; described over-temperature protection unit 51 is in order to the temperature of the module 50 of releasing described in detecting, and when described in release when the temperature of module 50 is greater than a design temperature threshold value and send an overheat protector signal to the module 50 of releasing. Alternatively, over-temperature protection unit 51 outside of module 5 of releasing described in also can being arranged on.
Furthermore; described over-temperature protection unit 51 comprises a current source (not shown); described current source is electrically connected with the negative input of described operational amplifier OP1; described current source for when described in release the temperature of module 50 while being greater than a design temperature threshold value, described current source provides the extremely negative input of described operational amplifier OP1 of an electric current.
To illustrate the operation principle of thyristor regulating optical circuit below:
The electrode input end of the operational amplifier OP1 of the described module 50 of releasing is electrically connected to described constant flow module 40 by the first resistance R 1. The negative input of described operational amplifier OP1 connects a reference voltage V ref. Described operational amplifier OP1 obtains the both end voltage of the first resistance R 1 according to the size of current that flows through constant flow module 40, and after operation amplifier, provide to the grid of described MOS transistor M1, change along with the variation of the output voltage of described operational amplifier OP1 so flow through the electric current of described MOS transistor M1, thereby the electric current of the module 50 of releasing described in making to flow through is more than or equal to the electric current sum that flows through described constant flow module 40 extinction current that described light-adjusting module 20 is worked.
In the time of the light modulation angle less (LED lamp is darker) of the controllable silicon dimmer 21 in described light-adjusting module 20, the electric current that flows through described constant flow module 40 is less, and the floating voltage that described constant flow module 40 offers described the first resistance R 1 reduces. Because the reference voltage V ref of described operational amplifier OP1 is constant, and to make the positive-negative input end voltage matches of described operational amplifier OP1, so the pressure reduction at described the first resistance R 1 two ends needs to increase, described operational amplifier OP1 controls the electric current increase of flowing through described MOS transistor M1 accordingly. In the time flowing through the electric current of described MOS transistor M1 and increase, the electric current of the module 50 that can ensure to release described in flowing through still can be more than or equal to the electric current sum that flows through described constant flow module 40 extinction current that described light-adjusting module 20 is worked. That is the LED load in described constant flow module 40 also can keep normal operating conditions. That is to say, in the time flowing through the electric current of constant flow module 40 and reduce, for the extinction current that ensures that light-adjusting module 20 is worked, the described module 50 of releasing can detect the size of current that flows through described constant flow module 40, determine the output end voltage of described operational amplifier OP1 with this, and then realize and dynamically adjust the electric current that MOS transistor M1 flows through, the size of current of the module 50 of releasing described in wherein flowing through is inversely proportional to the size of current that flows through described constant flow module 40.
Otherwise when the light modulation angle of the controllable silicon dimmer 21 in described light-adjusting module 20 is when large (LED lamp is brighter), the electric current that flows through described constant flow module 40 is larger, the floating voltage that described constant flow module 40 offers described the first resistance R 1 increases. Because the reference voltage V ref of described operational amplifier OP1 is constant, and to make the positive-negative input end voltage matches of described operational amplifier, so the pressure reduction at described the first resistance R 1 two ends need to reduce, the electric current that described MOS transistor M1 is flow through in described operational amplifier OP1 control accordingly reduces. In the time flowing through the electric current of described MOS transistor M1 and reduce, the electric current of the module 50 that also can ensure to release described in flowing through still can be more than or equal to the electric current sum that flows through described constant flow module 40 extinction current that described light-adjusting module 20 is worked. Like this, meet the loss of module 50 of releasing described in not only can reducing under the extinction current condition that described light-adjusting module 20 works, and promoting the efficiency of whole circuit.
Less and described rectification module 30 output voltages when lower in light modulation angle, the extinction current that mainly provides controllable silicon dimmer 21 to work by the described module 50 of releasing to described light-adjusting module 20 are provided. In light modulation angle, larger and described rectification module 30 output voltages are when higher, described in release module 50 adjust release described in flowing through the electric current of module 50 or even turn-off described in the module 50 of releasing, to promote overall efficiency.
In addition, the built-in over-temperature protection unit 51 of the module of releasing described in 50 can be monitored the temperature of the whole module 50 of releasing. In the time that being greater than a design temperature threshold value, temperature sends an overheat protector signal to the module 50 of releasing. So; utilize the built-in current source of described over-temperature protection unit 51 and the negative input of an electric current to described operational amplifier OP1 is provided; make so the output voltage of described operational amplifier OP1 be less than the threshold voltage of described MOS transistor M1; thereby turn-off described MOS transistor M1; the described module 50 of releasing is also turned off; so, can avoid system temperature too high.
Therefore, thyristor regulating optical circuit of the present utility model can effectively solve the problems of the prior art, and for example, switching mode light modulation scheme is difficult to accomplish small size; Number of devices is many, and cost is high; The common module 50 of releasing can not detection of dynamic temperature; And need additional device for solving conduct radiation.
In addition, in the present embodiment, described constant flow module 40 and described in the module 50 of releasing can be arranged on respectively different chips, wherein constant flow module 40 can be arranged at LED and drive chip, as BP5131X series, linear LED drives chip, and the linear LED of BP5132X series drives chip. Certainly, in other parts embodiment, described constant flow module 40 and described in the module 50 of releasing can be arranged on same chip.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a thyristor regulating optical circuit, described thyristor regulating optical circuit comprises a power module, one rectification module, one light-adjusting module and a constant flow module, described power module is in order to provide an input voltage, described light-adjusting module is electrically connected with described power module, described light-adjusting module carries out cut to realize light modulation for the input voltage of described power module being exported to described rectification module, described rectification module is electrically connected with described light-adjusting module, described rectification module is for carrying out rectification with output commutating voltage by the voltage of described light-adjusting module output, described constant flow module is electrically connected with described rectification module, be used for driving load, and the electric current that makes to flow through load is steady state value, it is characterized in that, described thyristor regulating optical circuit comprises:
One module of releasing, be electrically connected with described rectification module and constant flow module respectively, the described module of the releasing module of releasing for the electric current of the module of releasing described in flowing through according to the size of current adjustment of flowing through constant flow module or described in turn-offing, so that the electric current of the module of releasing described in flowing through and the electric current sum that flows through described constant flow module are more than or equal to the extinction current of described light-adjusting module work.
2. thyristor regulating optical circuit according to claim 1, is characterized in that, the module of releasing described in described constant flow module is electrically connected to by one first resistance R 1.
3. thyristor regulating optical circuit according to claim 1, is characterized in that, described in the module of releasing comprise: a MOS transistor and an operational amplifier; The grid of described MOS transistor is electrically connected to the output of described operational amplifier, and the source electrode of described MOS transistor is electrically connected to the electrode input end of described operational amplifier, and the drain electrode of described MOS transistor is electrically connected to described rectification module; The negative input of described operational amplifier connects a reference voltage.
4. thyristor regulating optical circuit according to claim 3, is characterized in that, the drain electrode of described MOS transistor is electrically connected to described rectification module by one second resistance.
5. thyristor regulating optical circuit according to claim 1; it is characterized in that; the described module of releasing further comprises an over-temperature protection unit; the negative input of the operational amplifier of the module of releasing described in described over-temperature protection unit is electrically connected to; described over-temperature protection unit is in order to the temperature of the module of releasing described in detecting, and when described in release when the temperature of module is greater than a design temperature threshold value and send an overheat protector signal to the module of releasing.
6. thyristor regulating optical circuit according to claim 5; it is characterized in that; described over-temperature protection unit comprises a current source; described current source is electrically connected with the negative input of described operational amplifier; described current source for when described in release the temperature of module while being greater than a design temperature threshold value, described current source provides the extremely negative input of described operational amplifier of an electric current.
7. thyristor regulating optical circuit according to claim 1, is characterized in that, described constant flow module and described in the module of releasing be arranged on same chip.
8. thyristor regulating optical circuit according to claim 1, is characterized in that, described constant flow module and described in the module of releasing be separately positioned on different chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620062310.0U CN205320340U (en) | 2016-01-22 | 2016-01-22 | Silicon controlled rectifier dimming circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620062310.0U CN205320340U (en) | 2016-01-22 | 2016-01-22 | Silicon controlled rectifier dimming circuit |
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| CN205320340U true CN205320340U (en) | 2016-06-15 |
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| CN201620062310.0U Active CN205320340U (en) | 2016-01-22 | 2016-01-22 | Silicon controlled rectifier dimming circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111083828A (en) * | 2019-12-27 | 2020-04-28 | 安徽乐图电子科技有限公司 | Silicon controlled rectifier dimming circuit, dimming method and LED driving circuit applying silicon controlled rectifier dimming circuit and dimming method |
| CN111432526A (en) * | 2020-04-13 | 2020-07-17 | 昂宝电子（上海）有限公司 | Control system and method for power factor optimization of L ED lighting system |
-
2016
- 2016-01-22 CN CN201620062310.0U patent/CN205320340U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111083828A (en) * | 2019-12-27 | 2020-04-28 | 安徽乐图电子科技有限公司 | Silicon controlled rectifier dimming circuit, dimming method and LED driving circuit applying silicon controlled rectifier dimming circuit and dimming method |
| CN111432526A (en) * | 2020-04-13 | 2020-07-17 | 昂宝电子（上海）有限公司 | Control system and method for power factor optimization of L ED lighting system |
| US11997772B2 (en) | 2020-04-13 | 2024-05-28 | On-Bright Electronics (Shanghai) Co., Ltd. | Systems and methods for controlling power factors of led lighting systems |
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Address after: 5 room 504-511, room 2, Lane 666, Zhang Heng Road, Pudong New Area, China (Shanghai) free trade zone, Shanghai, China () Patentee after: Shanghai semiconducto Limited by Share Ltd Address before: 201204 Zhang Heng road Shanghai, Pudong New Area Zhangjiang hi tech Park Lane 666 No. 2 floor 504-511 room 5 Patentee before: Shanghai Bright Power Semiconductor Co.,Ltd. |