CN207427518U - A kind of three-stage dimming control circuit of LED light - Google Patents
A kind of three-stage dimming control circuit of LED light Download PDFInfo
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- CN207427518U CN207427518U CN201721382114.2U CN201721382114U CN207427518U CN 207427518 U CN207427518 U CN 207427518U CN 201721382114 U CN201721382114 U CN 201721382114U CN 207427518 U CN207427518 U CN 207427518U
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Abstract
The utility model is related to a kind of three-stage dimming control circuits of LED light, include the LED of two firewires, a zero curve and two groups of difference brightness, access has one group of LED and driving power between every firewire and zero curve；Every group of driving power is made of current rectifying and wave filtering circuit and constant-current circuit, the input terminal of current rectifying and wave filtering circuit is connected with wherein a firewire and zero curve, the output terminal of current rectifying and wave filtering circuit connects the positive terminal of one of which LED all the way, and another way is connected by constant-current circuit with LED negative terminals.The three-stage dimming control circuit of LED light provided by the utility model, driving power is only made of current rectifying and wave filtering circuit and constant-current circuit used by every group of LED, it can equally realize the three-stage dimming of LED light, so that the structure of driving power significantly simplifies, the quantity of component is reduced, manufacture cost is minimized, and the volume of LED light can also reduce, and be conducive to the structure design of lamp body.
Description
Technical field
The utility model is related to the three-stage dimming control circuits of technical field of LED illumination, specifically a kind of LED light.
Background technology
The purpose of three-stage dimming circuit in conventional incandescent is to adjust three kinds of different brightness
Light uses three input lines（Two firewires and a zero curve）, two pieces different brightness filament, made by switch
The filament light-emitting of single difference brightness makes two filaments while shines, and thus obtains three kinds of different luminosity, so as to
Realize the light modulation of three kinds of different brightness.
With the development of LED technology, LED light effect be continuously improved and incandescent lamp quit listing, LED has largely replaced such
Incandescent lamp, because not changing the mode of connection of original switch in replacement process, in the LED light for using three-stage dimming pattern,
Since the voltages or electric current of single group LED and double group LED exist different, therefore every group of LED need to be used alone a driving power, two groups
LED needs to realize three-stage dimming using two driving powers.Since two driving powers are required to be placed in LED lamp,
Therefore so that LED lamp becomes larger brings difficulty to design.
A kind of three-stage dimming LED lamp circuit as disclosed in Chinese patent CN201621161990.8, it is different using two groups
LED, every group of LED be respectively adopted a driving power, and each driving power includes being connected to every group between firewire and zero curve
The anti-lightning strike circuit that is made of varistor, the rectifying circuit being made of rectifier bridge, be made of inductance, resistance and capacitance it is anti-dry
It disturbs circuit and the BUCK being made of constant current chip and peripheral circuit decompressions control circuit is formed, and pass through adjusting switch point
Single group or double groups of LED is not made to shine and realize three-stage dimming.Above-mentioned driving power is there are complicated, and component is more, and volume is big,
The problem of lamp body is difficult to accommodate and cost is higher.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the utility model discloses a kind of three-stage dimming controls of LED light
Circuit has the characteristics that simple in structure, component is less, small, lamp design is simple, of low cost and assembling is simple.
To achieve these goals, technical solution is used by the utility model：
A kind of three-stage dimming control circuit of LED light includes the LED of two firewires, a zero curve and two groups of difference brightness,
Access has one group of LED and driving power between every firewire and zero curve；Every group of driving power is by rectifying and wave-filtering
Circuit and constant-current circuit are formed, and the input terminal of current rectifying and wave filtering circuit is connected with wherein a firewire and zero curve, current rectifying and wave filtering circuit
Output terminal connect the positive terminal of one of which LED all the way, another way is connected by constant-current circuit with LED negative terminals.
The current rectifying and wave filtering circuit includes rectifier bridge, electrolytic capacitor and bleeder resistance, and the ac terminal of rectifier bridge connects respectively
Connect wherein a firewire and zero curve, the positive terminal of the positive output terminals connection one of which LED of rectifier bridge, electrolytic capacitor and
Bleeder resistance is connected in parallel across between the leading-out terminal of rectifier bridge.
Fuse resistance is connected between the firewire and the AC input terminal of rectifier bridge.
The constant-current circuit includes current constant control chip and sampling resistor, and current constant control chip includes three wire connection terminals,
First wire connection terminal is connected with the negative terminal of LED, and the second wire connection terminal is connected and is grounded with the negative output terminals of rectifier bridge,
3rd wire connection terminal is connected with one end of sampling resistor, and the other end of sampling resistor is connected with the second wire connection terminal.
The three-stage dimming control circuit of LED light provided by the utility model, used by every group of LED driving power only by
Current rectifying and wave filtering circuit and constant-current circuit are formed, and can equally realize the three-stage dimming of LED light so that the structure of driving power is significantly
Simplify, the quantity of component is reduced, and manufacture cost is minimized, and the volume of LED light can also reduce, and the structure for being conducive to lamp body is set
Meter.
The utility model is further elaborated below by way of the drawings and specific embodiments.
Description of the drawings：
Fig. 1 is the three-stage dimming electric operation control circuit figure of the utility model.
Specific embodiment：
The three-stage dimming control circuit of a kind of LED light provided by the utility model, as shown in Figure 1, including the first firewire
L1, the second firewire L2, zero curve N, first group of LED1 and second group of LED2, wherein, zero curve N is the public output of two firewires.
One group of LED and driving power is accessed between every firewire and zero curve N.The structure of two driving powers is identical, by
Current rectifying and wave filtering circuit and constant-current circuit are formed.Wherein, current rectifying and wave filtering circuit includes rectifier bridge, electrolytic capacitor and bleeder resistance, permanent
Current circuit includes current constant control chip and sampling resistor, and the specific connection relation of foregoing circuit is illustrated with reference to Fig. 1 as follows：
The input terminal of first firewire L1 is electrically connected with city, the input terminal of output terminal and fuse F1
Connection, the output terminal of fuse F1 are connected with the ac input end of the first rectifier bridge BD1, the first rectifier bridge BD1's
Positive output end is connected with the anode of the anode of electrolytic capacitor CD1, one end of bleeder resistance R2 and first group of LED1, electrolytic capacitor
The cathode of CD1, the other end of bleeder resistance R2 are connected with the negative output terminal of the first rectifier bridge BD1, the cathode of first group of LED1 with
The 1st foot connection of first current constant control chip U1, the 2nd foot of the first current constant control chip U1 and bearing for the first rectifier bridge BD1 are defeated
Outlet is connected and is grounded, and the 3rd foot is connected with one end of sampling resistor R1, the other end of sampling resistor R1 and the first rectifier bridge BD1
Negative output terminal connection.Zero curve N input terminals are electrically connected with city, and one end of output and the ac input end of the first rectifier bridge BD1 connect
It connects, the other end of output is connected with the ac input end of the second rectifier bridge BD2, the positive output end of the second rectifier bridge BD2 and electrolysis
The anode connection of the anode of capacitance CD2, one end of bleeder resistance R3 and second group of LED2, the cathode of electrolytic capacitor CD2 are released
The other end of resistance R3 is connected with the negative output terminal of the second rectifier bridge BD2, the cathode and the second current constant control core of second group of LED2
The 1st foot connection of piece U2, the 2nd foot of the second current constant control chip U2 are connected and are grounded with the negative output terminal of the second rectifier bridge BD2,
3rd foot is connected with one end of sampling resistor R4, and the other end of sampling resistor R4 is connected with the negative output terminal of the second rectifier bridge BD2,
Second firewire L2 input terminals are electrically connected with city, and output terminal is connected with the input terminal of fuse F2, the output terminal of fuse F2 and
The ac input end connection of two rectifier bridge BD2.
Fuse in foregoing circuit is accessed between firewire and rectifier bridge input terminal, can prevent that input current is excessive and burns
Component in bad subsequent conditioning circuit.
Two groups of LED in foregoing circuit are two groups of different LED of brightness, and every group of independent shine can
The adjusting of low-light level and middle brightness, the adjusting of two groups of achievable high brightness that shine simultaneously are realized respectively.When zero curve N with
When first firewire L1 or the second firewire L2 are linked into alternating current, alternating current is inputted from firewire L1 or L2 after current rectifying and wave filtering circuit will
Then AC conversion exports to current constant control chip by first group or second group of LED into direct current, passes through current constant control core
Piece exports constant dc to zero curve N-terminal, realizes the light modulation of low-light level or middle brightness.When zero curve N and two firewires L1 and L2 are same
When being linked into alternating current, alternating current is inputted from every firewire input terminal, by respective current rectifying and wave filtering circuit, every group of LED and perseverance
Output constant current direct current to public zero curve exports N-terminal after flow control chip, realizes high brightness light modulation.
Above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, those of ordinary skill in the art couple
Other modifications or equivalent substitution that the technical solution of the utility model is made, without departing from technical solutions of the utility model
Spirit and scope should all cover in the right of the utility model.
Claims (4)
1. a kind of three-stage dimming control circuit of LED light includes the LED of two firewires, a zero curve and two groups of difference brightness, often
Access has one group of LED and driving power between root firewire and zero curve, it is characterised in that：Every group of driving power by
Current rectifying and wave filtering circuit and constant-current circuit are formed, and the input terminal of current rectifying and wave filtering circuit is connected with wherein a firewire and zero curve, rectification
The output terminal of filter circuit connects the positive terminal of one of which LED all the way, and another way passes through constant-current circuit and LED negative terminals
It is connected.
2. a kind of three-stage dimming control circuit of LED light according to claim 1, it is characterised in that：The rectifying and wave-filtering
Circuit includes rectifier bridge, electrolytic capacitor and bleeder resistance, and the ac terminal of rectifier bridge connects wherein a firewire and zero curve respectively,
The positive terminal of the positive output terminals connection one of which LED of rectifier bridge, electrolytic capacitor and bleeder resistance are connected in parallel across whole
Between the leading-out terminal for flowing bridge.
3. a kind of three-stage dimming control circuit of LED light according to claim 2, it is characterised in that：The firewire with it is whole
Fuse resistance is connected between the AC input terminal of stream bridge.
4. a kind of three-stage dimming control circuit of LED light according to claim 2, it is characterised in that：The constant-current circuit
Including current constant control chip and sampling resistor, current constant control chip includes three wire connection terminals, and the first wire connection terminal and LED's is negative
Extreme son is connected, and the second wire connection terminal is connected and is grounded with the negative output terminals of rectifier bridge, the 3rd wire connection terminal and sampling electricity
One end of resistance is connected, and the other end of sampling resistor is connected with the second wire connection terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721382114.2U CN207427518U (en) | 2017-10-25 | 2017-10-25 | A kind of three-stage dimming control circuit of LED light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721382114.2U CN207427518U (en) | 2017-10-25 | 2017-10-25 | A kind of three-stage dimming control circuit of LED light |
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| Publication Number | Publication Date |
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| CN207427518U true CN207427518U (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721382114.2U Active CN207427518U (en) | 2017-10-25 | 2017-10-25 | A kind of three-stage dimming control circuit of LED light |
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| CN (1) | CN207427518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267403A (en) * | 2019-07-01 | 2019-09-20 | 中山市企美照明电器有限公司 | A kind of LED track lamp energy-saving control system |
-
2017
- 2017-10-25 CN CN201721382114.2U patent/CN207427518U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267403A (en) * | 2019-07-01 | 2019-09-20 | 中山市企美照明电器有限公司 | A kind of LED track lamp energy-saving control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190801 Address after: 312300 Zhejiang Province, Shaoxing city Shangyu District of Tongjiang City Street Road No. 208 Co-patentee after: Zhejiang Yankon Lighting Electrical Group Co., Ltd. Patentee after: ZHEJIANG SUNSHINE MEIJIA LIGHTING CO., LTD. Co-patentee after: Zhejiang Sunny City Lighting Engineering Ltd. Address before: 312300 Zhejiang Province, Shaoxing city Shangyu District of Tongjiang City Street Road No. 208 Co-patentee before: Zhejiang Yankon Lighting Electrical Group Co., Ltd. Patentee before: ZHEJIANG SUNSHINE MEIJIA LIGHTING CO., LTD. |
|
| TR01 | Transfer of patent right |